VERBESSERTES ELEKTROBLASFASERSPINNVERFAHREN

Particle filter system incorporating nanofibers

A filtration device including a filtration medium having a plurality of nanofibers of diameters less than 1 micron formed into a fiber mat in the presence of an abruptly varying electric field. The filtration device includes a support attached to the filtration medium and having openings for fluid flow therethrough. A device for making a filter material. The device includes an electrospinning element configured to electrospin a plurality of fibers from a tip of the electrospinning element, a collector opposed to the electrospinning element configured to collect electrospun fibers on a surface of the collector, and an electric field modulation device configured to abruptly vary an electric field at the collector at least once during electrospinning of the fibers. A method for making a filter material. The method provides a support having openings for fluid flow therethrough, electrospins nanofibers across an entirety of the openings, and abruptly varies an electric field at the collector ...

Electro-spinning nanofibres onto a moving wire card

A nano-fibre is electro-spun from a melt or solution, by means of an electric field between a spinneret or bubble surface and a moving collector comprising a wire card 13 of which the wires 13b are electrically connected. The collector 13 is preferably a woollen or worsted card drum, belt or flat card. Preferably, the spinneret or melt or solution is held at high potential and the wires earthed. A card wire 13, comprising electrically connected points or pins, is also claimed. A preferred card wire 13 comprises non-conductive material 41 with wires 13b soldered on a backing of conductive material 42. The method produces an aligned nanofibre web that can be made into strands, yarns, cable or rope or non-woven fabrics such as stitch bonded and stitch knitted fabric.

Electrostatically produced tubular structures

In apparatus comprising needles (l0), a mandrel (ll) and electrostatically charged plates (l2, l3, l4 and l5), variation of the electrostatic potential on the mandrel (ll) and the plates (l2, l3, l4 and l5) produces variation of the fibrous structure produced. In general, where the mandrel (ll) is significantly more attractive to the fibres, a microstructure of fibres of substantially uniform diameter is produced, these fibres being generally randomly orientated. Where the voltages on the mandrel (ll) and on the plates (l3 and l5) are varied to lessen the attraction of the mandrel (ll) relative to the plates (l3, l5) the fibrous structure is varied to produce fibres of a larger diameter than the original micro fibrous structure, this having a significant effect on characteristics of the fibrous structure.

ELECTROSTATICALLY PRODUCED STRUCTURES

Electrospinning

ORIENTED MESOUND OF NANO-TUBE FLEECES

PRODUCTION OF ELECTROSTATICALLY SPUN PRODUCTS

Preparation of products having a tubular portion comprising electrostatically spinning a fibreizable liquid, the electrostatic field being distorted by the presence of an auxiliary electrode, preferably so as to encourage the deposition of circumferential fibres.

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

Improved electroblowing fiber spinning process

Composite carbon fiber with molecular recognition effect

Improved electroblowing web formation process

ELECTROBLOWING WEB FORMATION PROCESS

METHOD AND APPARATUS FOR ALIGNING NANOWIRES DEPOSITED BY AN ELECTROSPINNING PROCESS

Embodiments of the invention generally include apparatus and methods for depositing nanowires in a predetermined pattern during an electrospinning process. An apparatus includes a nozzle for containing and ejecting a deposition material, and a voltage source coupled to the nozzle to eject the deposition material. One or more electric field shaping devices are positioned to shape the electric field adjacent to a substrate to control the trajectory of the ejected deposition material. The electric field shaping device converges an electric field at a point near the surface of the substrate to accurately deposit the deposition material on the substrate in a predetermined pattern. The methods include applying a voltage to a nozzle to eject an electrically-charged deposition material towards a substrate, and shaping one or more electric fields to control the trajectory of the electrically-charged deposition material. The deposition material is then deposited on the substrate in a predetermined ...

IMPROVED VASCULAR PROSTHESIS AND METHOD FOR PRODUCTION THEREOF

A vascular prosthesis comprising a first layer (12) having a predetermined first porosity and a second layer (14) having a predetermined second porosity, wherein the first layer (12) and the second layer (14) are each made of first and second electrospun polymer fibers.

Electrospinning

Among other things, fibers are electrospun using an electrospinning structure comprising a base and at least one emitting element on the base, a first electrode arranged at a distance from the free end of the at least one emitting element, and optionally a collection element between the at least one emitting element and the first electrode, the collection element being configured to collect the fibers. The at least one emitting element has a projecting free end. At least a portion of the base, the at least one emitting element, or both include a porous material. The first electrode is configured to cause fibers to be produced from the free end of the at least one emitting element.

Method for controlled electrospinning

An electrospinning apparatus and methodology is described that produces medical devices, such as scaffolds that induce the formation of a natural fibrous structure (primarily collagen and elastin) in a tissue-engineered medical device. The apparatus uses collection surfaces designed to manipulate or change the electrostatic field so that the electrospun fibers are arranged in desirable patterns that are similar to or mimic the fibrillar structure of an animal tissue. The manipulation results in fibers that are preferentially oriented in a predefined pattern. In addition, the interfiber space between the fibers and the fiber diameter are consistently within a predefined range. Using these techniques in conjunction with controlling polymer properties enables the production of a scaffold that has the structural and mechanical characteristics similar to the native tissue.

Electrospinning of fibres

A method for the production of an array of aligned fibres by electrospinning, which comprises forming a focused electrostatic field between a body having an orifice 4, maintained at a first electric potential, and a counter electrode 7, maintained at a second electric potential, the modulus of said second electric potential being greater than the modulus of said first electric potential, introducing a solution of a polymer in a volatile solvent into the electrostatic field through the orifice 4 such that the polymer solution flows from the orifice towards the counter electrode 7 in the form of a charged jet or stream, said jet or stream having a path length at least a portion of which is substantially straight, disposing a collector means 15 in the path of the jet or stream at a position within the substantially straight portion thereof at which the solvent has evaporated sufficiently for the jet or stream to solidify, and moving the collector means relative to the jet or stream to deposit ...

Electrospinning

PROCEDURE AND EQUIPMENT FOR THE PRODUCTION OF POLYMER FIBER COVERINGS BY ELECTRICAL SPIDERS

Medicated polymer-coated stent assembly

Polymer fiber tubular structure having improved kinking resistance

Biomedical patches with aligned fibers

A structure of aligned (e.g., radially and/or polygonally aligned) fibers, and systems and methods for producing and using the same. One or more structures provided may be created using an apparatus that includes one or more first electrodes that define an area and/or partially circumscribe an area. For example, a single first electrode may enclose the area, or a plurality of first electrode(s) may be positioned on at least a portion of the perimeter of the area. A second electrode is positioned within the area. Electrodes with rounded (e.g., convex) surfaces may be arranged in an array, and a fibrous structure created using such electrodes may include an array of wells at positions corresponding to the positions of the electrodes.

IMPROVED VASCULAR PROSTHESIS AND METHOD FOR PRODUCTION THEREOF

A vascular prosthesis comprising a first layer (12) having a predetermined first porosity and a second layer (14) having a predetermined second porosity, wherein the first layer (12) and the second layer (14) are each made of first and second electrospun polymer fibers.

METHOD AND APPARATUS FOR MANUFACTURING POLYMER FIBER SHELLS VIA ELECTROSPINNING

An apparatus for manufacturing a polymer fiber shell from liquefied polymer is provided. The apparatus includes: (a) a precipitation electrode being for generating the polymer fiber shell thereupon; (b) a dispenser, being at a first potential relative to the precipitation electrode so as to generate an electric field between the precipitation electrode and the dispenser, the dispenser being for: (i) charging the liquefied polymer thereby providing a charged liquefied polymer; and (ii) dispensing the charged liquefied polymer in a direction of the precipitation electrode; and (c) a subsidiary electrode being at a second potential relative to the precipitation electrode, the subsidiary electrode being for modifying the electric field between the precipitation electrode and the dispenser.

DEVICE AND METHOD TO PRODUCE NANOFIBERS AND CONSTRUCTS THEREOF

The present invention relates to a device and a method for producing polymer fibers, in particular to nozzle-less electrospinning devices and methods to produce fibers and constructs thereof, wherein the nanofibers are generated by using pulsed and/or bursted ultrasound.

Stereocomplex crystal polylactic acid nanofiber, bacteriostatic stereocomplex crystal polylactic acid nanofiber as well as preparation method and application thereof

Preparation method of cordyceps sinensis composite bioglass traditional Chinese medicinal repairing material

Electrospinning method for mass-preparing nanofibers by novel electrospinning device

Electrostatic spinning biological composite desulfurization film and preparation method thereof

Manufacture of artificial fibres

정렬된 섬유를 포함하는 생의학용 패치

... 본 발명은 정렬된 (예컨대 방사상 및/또는 다각형 정렬) 섬유의 구조물, 및 그의 제조 및 사용을 위한 시스템 및 방법에 관한 것이다. 제공되는 하나 이상의 구조는 영역을 한정하거나 및/또는 영역을 부분적으로 외접하는 하나 이상의 제1 전극을 포함하는 장치를 사용하여 생성될 수 있다. 예를 들면, 하나의 제1 전극이 영역을 에워쌀 수 있거나, 또는 복수의 제1 전극(들)이 영역 주위의 적어도 일부에 위치될 수 있다. 제2 전극은 영역 내에 위치된다. 둥근 (예컨대 볼록한) 표면을 가지는 전극이 배열되어 배치될 수 있으며, 그와 같은 전극을 사용하여 생성되는 섬유 구조는 전극의 위치에 상응하는 위치에 일련의 웰들을 포함할 수 있다.

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

ELECTROSPINNING APPARATUS AND METHODS OF USE THEREOF

The invention relates to an electrospinning apparatus and method of use thereof.

ORIENTED MESOTUBULAR AND NANTOTUBULAR NON-WOVENS

The invention relates to oriented non-wovens made of mesotubes and nanotubes (hollow fibres), wherein the tubes or hollow fibres are oriented with an inner diameter of 10 nm - 50 mm preferably in a single direction. The invention also relates to a method for the production thereof. The oriented hollow fibre non-wovens can be produced by coating oriented template fibre non-wovens made of degradable materials with non-degradable materials, whereby the degradable materials can be destroyed, for example, by thermal methods. The oriented template fibre non-wovens made of degradable materials can be produced by special electrospinning techniques. The oriented hollow fibre non-wovens can, for example, be used in separation engineering, catalysis, microelectronics, medical engineering, materials engineering or in the clothing industry.

ELECTROSPUN CACTUS MUCILAGE NANOFIBERS

Novel electrospun nanofibers and nanofibrous membranes, methods of manufacturing the same, and methods of using the same are provided. The nanofibers include a cactus mucilage, such as mucilage from -. An organic polymer can be added to the cactus mucilage before electrospinning. The nanofibrous membranes can be used in water filtration. 1. A method of producing an electrospun nanofiber , comprising:forming an electrospinning solution comprising a cactus mucilage and an organic polymer; andelectrospinning the electrospinning solution to form the electrospun nanofibril.2. The method according to claim 1 , wherein forming the electrospinning; solution comprises:dissolving the cactus mucilage in a first solvent to form a first solution;dissolving the organic polymer in a second solvent to form a second solution; andcombining the second solution and the first solution to form the electrospinning solution.3Opuntia ficusindica. The method according to claim 1 , wherein the cactus mucilage is -(Ofi) mucilage.4. The method according to claim 3 , wherein the organic polymer is polyvinyl alcohol (PVA).5. The method according to claim 1 , wherein the organic polymer is PVA claim 1 , chitosan claim 1 , polyethylene glycol (PEG) claim 1 , or poly lactic acid (PLA).6. The method according to claim 2 , wherein the first solvent comprises acetic acid claim 2 , and wherein the second solvent is water.7. The method according to claim 1 , wherein electrospinning; the solution comprises electrospinning the solution in an electric field of from about 1.5×10V/m to about 3.5×10V/m.8. The method according to claim 2 , wherein the electrospinning solution comprises the organic polymer and the cactus mucilage present in a ratio of either 70:30 or 50:50 (polymer:mucilage).9. The method according to claim 1 , wherein the cactus mucilage has a linear repeating chain of (1→4)-linked β-D-galacturonic acid and an α(1→2)-linked L-rhamnose with trisaccharide side chains of β(1→6)-linked D-galactose ...

Glossy member and method of producing the member

Provided is a glossy member, including: a polymer substrate; and a polymer fiber assembly disposed on the polymer substrate, in which: the polymer fiber assembly has polymer fibers oriented in a given direction; an absolute value of a difference between an average solubility parameter of a constituent material for the polymer substrate and an average solubility parameter of a polymer material of the polymer fibers is less than 5 (J/cm3)1/2; the polymer fibers have an orientation degree of 90% or more; the polymer fibers have fiber diameters of 0.05 μm or more and 5 μm or less; and in at least part of a repeating unit structure in the polymer material, a dipole moment is 0 D or more and 3.50 D or less, and an absolute value of a SOMO is 9 eV or more and 12 eV or less.

DEVICE AND METHOD FOR PRODUCING AN ANISOTROPIC FIBRE FRAMEWORK BY ELECTROSPINNING

An Electrospinning Device and Configuration Method

Improved vascular prosthesis and method for production thereof

Electrostatic spinning device internally provided with electrode in vacuum environment and electrostatic spinning method

Modified composite nanofiber membrane of cardanol and preparation method and application of membrane on enzyme immobilization

Preparation method of three-dimensional nanofiber membrane used for filtering out PM2.5

Electrostatic micro-fluidic control spinning device and spinning process

Device for the manufacture of artificial fibres

nonwoven fibrous structures and method of production thereof

método de produção de uma bandagem hemostática utilizando um objeto rotativo

METHOD FOR APPLYING A THREAD PATTERN TO A FLAT SUBSTRATE, APPARATUS THEREFOR, AND FLAT SUBSTRATE COMPRISING AN APPLIED THREAD PATTERN

Disclosed is a method for applying a thread pattern composed of fine fibers or fiber strands obtained by means of electrospinning to a flat, particularly web-shaped, substrate. In said method, the substrate is displaced relative to a thread spinning electrode (16) in at least one direction of the system of coordinates in accordance with the desired pattern during the thread spinning process, and the fiber or the fiber strands (nanofiber strand 22) is/are fixed to the substrate (12) in at least some points.

ELECTROSPINNING DEVICE AND METHOD FOR APPLYING POLYMER TO TISSUE

An electrosurgical electrospinning device is presented including a reservoir having a polymer solution disposed therein, the reservoir cooperating with a dispensing apparatus configured to dispense the polymer solution from the reservoir. The electrosurgical electrospinning device further includes a plurality of nozzles connected to the reservoir, each nozzle of the plurality of nozzles including a plurality of needles and a blow-spraying mechanism for blowing gas around each nozzle of the plurality of nozzles when the polymer solution is dispensed from the plurality of needles. The gas from the blow-spraying mechanism and the polymer solution from the plurality of needles are coaxially applied directly onto tissue at voltages of less than or equal to 3 kV. 1. An electrosurgical electrospinning device , comprising:a reservoir having a polymer solution disposed therein, the reservoir cooperating with a dispensing apparatus configured to dispense the polymer solution from the reservoir;a plurality of nozzles connected to the reservoir, each nozzle of the plurality of nozzles including a plurality of needles; anda blow-spraying mechanism for blowing gas around each nozzle of the plurality of nozzles when the polymer solution is dispensed from the plurality of needles;wherein the gas from the blow-spraying mechanism and the polymer solution from the plurality of needles are coaxially applied directly onto tissue at voltages of less than or equal to 3 kV.2. The electrosurgical electrospinning device according to claim 1 , wherein the plurality of nozzles are arranged in a linear configuration.3. The electrosurgical electrospinning device according to claim 1 , wherein the plurality of nozzles are arranged in a circular configuration.4. The electrosurgical electrospinning device according to claim 1 , wherein the plurality of nozzles are arranged as an array.5. The electrosurgical electrospinning device according to claim 1 , wherein the electrospinning device operates at ...

FABRICATION OF NANOFIBER REINFORCED STRUCTURES FOR TISSUE ENGINEERING

Disclosed are composite arrays and methods of forming the arrays. Composite arrays include a hydrogel-forming polymeric network and a network of electrospun fibers embedded within the polymeric network. For instance, the polymeric network can include one or more extracellular matrix proteins. The network of electrospun fibers can describe an open configuration that incorporates sufficient space between adjacent fibers to allow for cellular ingrowth between and among individual fibers. Disclosed composite arrays can be utilized as a supporting scaffold for living cells, for instance in development of bioengineered tissue constructs.

Controlled electrospinning of fibers

An electrospinning apparatus for spinning polymer fibers from a fluid delivered by a jet supply device, which apparatus comprises at least one collector of a plurality of collectors in electrical communication with an electrode of the jet supply device. Collectors are insulated from each other. At least one collector comprises a stretcher adapted to stretch polymer fibers. The stretcher is an integral part of at least one collector. A controller controls sequence and time duration at which collectors are in electrical communication with the electrode of the jet supply device creating a non-woven polymer fabric or weaving polymer fibers into a fabric. The electrospinning apparatus comprises a rotator adapted to rotate the stretcher.

Improvements in synthetic vascular grafts

A synthetic vascular graft has an inner porous layer, an intermediate substantially non-porous layer (20) and a porous outer layer, in the preferred embodiment the graft being formed by continuous electrostatic spinning.

METHODS FOR ELECTROSPIN COATING AND LAMINATING OF ENDOLUMINAL PROSTHESES

СПОСОБ ПРОИЗВОДСТВА ПОЛИМЕРНЫХ НАНОВОЛОКОН И ЛИНЕЙНАЯ СИСТЕМА ИЗ ПОЛИМЕРНЫХ НАНОВОЛОКОН, ПОЛУЧЕННАЯ ЭТИМ СПОСОБОМ

Изобретение касается способа производства полимерных нановолокон, при котором формование полимерных нановолокон осуществляется под действием силы электрического поля на раствор или расплав полимера, находящийся на поверхности волокнообразующего электрода, около которой для электростатического формования волокна поочередно создается электрическое поле между волокнообразующим электродом (1), на который подается переменное напряжение, и ионами (30, 31) воздуха и/или газа, образовавшимися и/или подведенными в окружающее его пространство, без использования противоэлектрода, причем в зависимости от фазы переменного напряжения на волокнообразующем электроде (1) формуются полимерные нановолокна с противоположным электрическим зарядом и/или с участками с противоположным электрическим зарядом, которые после своего возникновения под действием электростатических сил группируются, образуя линейную систему в виде миниатюрного жгута или полосы, которая свободно движется в пространстве от волокнообразующего ...

УСТРОЙСТВО ДЛЯ ПРОИЗВОДСТВА НАНОВОЛОКОН ЭЛЕКТРОСТАТИЧЕСКИМ МЕТОДОМ ФОРМОВАНИЯ ВОЛОКНА ИЗ ПОЛИМЕРНОЙ МАТРИЦЫ

... 1. Устройство для производства нановолокон электростатическим методом формования волокна из полимерной матрицы (51) в пространстве формования волокна, в котором расположены осадительный электрод (2) и волокнообразующий электрод, между которыми создано электрическое поле высокой напряженности, при этом устройство содержит по крайней мере одно электрическое устройство (7), соединенное с устройством для генерирования и/или обработки электрических импульсов напряжения, отличающееся тем, что электрическое устройство (7) расположено в пространстве формования волокна и соединено с одной обмоткой трансформатора (8, 11), электрическая прочность изоляции которой рассчитана на высокое напряжение, причем трансформатор расположен вне электрического поля, а вторая обмотка трансформатора (8, 11) соединена с устройством для генерирования и/или обработки электрических импульсов напряжения, размещенным вне пространства формования волокна. ! 2. Устройство по п.1, отличающееся тем, что электрическое устройство ...

Electrospinning of fibres

Nanfibres

IMPROVED VASKULARPROTHESE AND PROCEDURE FOR YOUR PRODUCTION

PORTABLE ELECTRICAL SPIN DEVICE

Electrospinning apparatus, methods of use, and uncompressed fibrous mesh

Embodiments of the present disclosure provide electrospinning devices, methods of use, uncompressed fibrous mesh, and the like, are disclosed.

Method and apparatus for making fibers

METHOD FOR PRODUCING CARBON NANOFIBER SUPPORTING METAL FINE PARTICLE

A main object of the present invention is to provide a method for producing a carbon nanofiber supporting a metal fine particle in which the metal fine particles are supported in high dispersion and sintering of the metal fine particles is restrained. The present invention attains the object by providing a method for producing a carbon nanofiber supporting a metal fine particle comprising a step of: spinning a material composition which contains a nitrogen-containing polymer, including a nitrogen element and capable of forming a carbon nanofiber, and an organometallic compound by an electro spinning process, and the spinning is conducted under a condition which keeps the nitrogen element remained to the carbon nanofiber and allows the formation of the carbon nanofiber.

ELECTROSTATICALLY PRODUCED STRUCTURES AND METHODS OF MANUFACTURING THEREOF

IMPROVEMENTS IN ELECTROSTATICALLY PRODUCED STRUCTURES AND METHODS OF MANUFACTURING THEREOF. In apparatus comprising needles (10), a mandrel (11) and electrostatically charged plates (12, 13, 14 and 15), variation of the electrostatic potential on the mandrel (11) and the plates (12, 13, 14 and 15) produces variation of the fibrous structure produced. In general, where the mandrel (11) is significantly more attractive to the fibres, a microstructure of fibres of substantially uniform diameter is produced, these fibres being generally randomly orientated. Where the voltages on the mandrel (11) and on the plates (13 and 15) are varied to lessen the attraction of the mandrel (11) relative to the plates (13, 15) the fibrous structure is varied to produce fibres of a larger diameter than the original micro fibrous structure, this having a significant effect on characteristics of the fibrous structure.

Method for preparing multifunctional PVA nano balls using electrostatic spinning machine

Red and green fluorescence double-anisotropy conductive flexible composite film and preparation method thereof

Nanofiber membrane for air sterilization and purification and preparation method

나노파이버 제조 방법 및 장치

... 전계 방사의 개시 시나 정지 시의 불안정한 방사 제트에 기인하는 불량품을 없앤 나노파이버 제조 방법 및 장치를 제공한다. 폴리머를 용매에 용해시킨 용액(25)을, 노즐(16)의 선단으로부터 내보내어, 선단 개구(16b)에 테일러콘(44)을 형성한다. 전원부(62)에 의하여, 용액(25)과 컬렉터의 사이에 전압을 가하여, 테일러콘(44)으로부터 컬렉터(50)에 방사 제트(45)를 분출한다. 전계 방사의 개시나 정지 시에는, 차폐 부재(48)를 방사 제트(45)의 분출 에어리어(42)에 삽입하여, 불안정한 방사 제트나 나노파이버를 받아낸다. 전계 방사의 개시 시나 정지 시의 불안정한 방사 제트가 제품이 되지 않아, 불량품의 발생이 억제된다.

METHOD OF MANUFACTURING FIBROUS HEMOSTATIC BANDAGES

A method of manufacturing a sturdy and pliable fibrous hemostatic dressing by making fibers that maximally expose surface area per unit weight of active ingredients as a means for aiding in the clot forming process and as a means of minimizing waste of active ingredients. The method uses a rotating object to spin off a liquid biocompatible fiber precursor, which is added at its center. Fibers formed then deposit on a collector located at a distance from the rotating object creating a fiber layer on the collector. An electrical potential difference is maintained between the rotating disk and the collector. Then, a liquid procoagulation species is introduced at the center of the rotating disk such that it spins off the rotating disk and coats the fibers.

ELECTROBLOWING WEB FORMATION PROCESS

An improved electroblowing process is provided for forming a fibrous web of nanofibers wherein polymer stream is issued from a spinning nozzle in a spinneret with the aid of a forwarding gas stream, passes an electrode and a resulting nanofiber web is collected on a collector. The process includes applying a high voltage to the electrode and grounding the spinneret such that an electric field is generated between the spinneret and the electrode of sufficient strength to impart an electrical charge on the polymer as it issues from the spinning nozzle.

IMPROVED ELECTROBLOWING WEB FORMATION PROCESS

An improved electroblowing process is provided for forming a fibrous web of nanofibers wherein polymer stream is issued from a spinning nozzle in a spinneret with the aid of a forwarding gas stream, passes an electrode and a resulting nanofiber web is collected on a collector. The process includes applying a high voltage to the spinneret and grounding the electrode such that an electric field is generated between the spinneret and the electrode of sufficient strength to impart an electrical charge on the polymer as it issues from the spinning nozzle.

Electroblowing web formation process

An improved electroblowing process is provided for forming a fibrous web of nanofibers wherein polymer stream is issued from a spinning nozzle in a spinneret with the aid of a forwarding gas stream, passes an electrode and a resulting nanofiber web is collected on a collector. The process includes applying a high voltage to the electrode and grounding the spinneret such that an electric field is generated between the spinneret and the electrode of sufficient strength to impart an electrical charge on the polymer as it issues from the spinning nozzle.

NANOFIBER MANUFACTURING APPARATUS AND METHOD OF MANUFACTURING NANOFIBERS

Provided is a nanofiber manufacturing apparatus including an effusing body (115) having an effusing hole (118) which allows the solution (300) to effuse in a given direction, a charging electrode (128) which is conductive and is disposed at a given distance from the effusing body (115), a charging power supply (122) configured to apply a given voltage between the effusing body (115) and the charging electrode (128), and a determining unit (102) configured to determine a flight path of the solution (300) and the nanofibers such that a length of the flight path C is longer than a shortest path length B which is a length of a shortest imaginary path connecting an end opening (119) of the effusing hole (118) and an accumulation part A on which the nanofibers (301) are accumulated.

СПОСОБ ПРОИЗВОДСТВА ПОЛИМЕРНЫХ НАНОВОЛОКОН И ЛИНЕЙНАЯ СИСТЕМА ИЗ ПОЛИМЕРНЫХ НАНОВОЛОКОН, ПОЛУЧЕННАЯ ЭТИМ СПОСОБОМ

APPARATUS FOR PRODUCING NANOFIBER UTILIZING ELECTROSPINNING AND NOZZLE PACK FOR THE APPARATUS

Electrospinning apparatus and nanofibers produced therefrom

Provided herein are gas and/or temperature assisted electrospinning apparatus, processes, components and polymer nanofibers.

IMPROVED VASCULAR PROSTHESIS AND METHOD FOR PRODUCTION THEREOF

A vascular prosthesis comprising a first layer (12) having a predetermined first porosity and a second layer (14) having a predetermined second porosity, wherein the first layer (12) and the second layer (14) are each made of first and second electrospun polymer fibers.

METHOD AND APPARATUS FOR CONTROLLED ALIGNMENT AND DEPOSITION OF BRANCHED ELECTROSPUN FIBER

A method for separating out nano-scale fiber threads from many fiber branches and controlling alignment and deposition of the fiber threads on a substrate, comprising: electrospinning at least synthetic polymer fiber streams from an electrically charged syringe needle; controlling the fiber using at least one electrically charged metallic disk rotating about an axis positioned below the needle; capturing the fiber using electrically grounded collector; extracting a single or plurality of fiber branch threads from the fiber streams, wherein the single or plurality of fiber branch threads is attracted to and intercepted by the collector shape, and depositing the single or plurality of fiber branch threads as substantially aligned fiber on the collector.

PRODUCTION OF ELECTROSTATICALLY SPUN PRODUCTS

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

A structure of aligned (e.g., radially and/or polygonally aligned) fibers, and systems and methods for producing and using the same. One or more structures provided may be created using an apparatus that includes one or more first electrodes that define an area and/or partially circumscribe an area. For example, a single first electrode may enclose the area, or a plurality of first electrode(s) may be positioned on at least a portion of the perimeter of the area. A second electrode is positioned within the area. Electrodes with rounded (e.g., convex) surfaces may be arranged in an array, and a fibrous structure created using such electrodes may include an array of wells at positions corresponding to the positions of the electrodes.

METHOD FOR PRODUCING CARBON NANOFIBER SUPPORTING METAL FINE PARTICLE

The invention aims mainly to provide a process for the production of carbon nanofiber carrying metal microparticles which makes it possible to form a carbon nanofiber carrying metal microparticles at high dispersion with the metal microparticles inhibited from sintering. A process for the production of carbon nanofiber carrying metal microparticles, characterized by comprising the spinning step of electrospinning a raw material composition comprising both a nitrogen-containing and carbon nanofiber-forming nitrogenous polymer and an organometallic compound under such conditions as to make the nitrogen retained in a carbon nanofiber and to enable the formation of a carbon nanofiber.

Improved electroblowing fiber spinning process

Disclosed is a fiber spinning process which provides an uncharged, electrically conductive polymer-containing liquid stream, issues said liquid stream in combination with a forwarding gas in a direction from at least one spinning nozzle in said spinneret, passes said liquid stream through an ion flow formed by corona discharge to impart electrical charge to the liquid stream, forms fine polymer fibers of said polymer and collects said fine polymer fibers.

Method for retrovirus removal

MANUFACTURING GRADIENT MATERIALS USING MAGNETICALLY-ASSISTED ELECTROSPINNING

Described are fibrous materials comprising a plurality of fibers having a longitudinal alignment gradient and/or a longitudinal composition gradient. Also described are methods of preparing the fibrous materials thereof and methods of treating organ or tissue damage with the fibrous materials.

THREE DIMENSIONAL STRUCTURES HAVING ALIGNED NANOFIBERS, METHODS OF MAKING SUCH STRUCTURES, APPARATUS FOR MAKING SUCH STRUCTURES, AND LAMINATED COMPOSITIONS OF MATTER INCLUDING ONE OR MORE LAYERS OF ALIGNED NANOFIBERS

Apparatus for producing a three dimensional nanofiber structure includes (1) at least two spaced electrodes; (2) a spinner adapted to rotate the at least two spaced electrodes; (3) a syringe assembly adapted to eject a polymer solution from a syringe of the syringe assembly towards the at least two spaced electrodes while the at least two spaced electrodes are rotated by the spinner; and (4) a power supply assembly for providing the two spaced electrodes at a first electric potential, and for providing the syringe at a second electric potential which is different from the first electric potential. A composition of matter may include (1) a least one layer of nanofibers in which a distribution of angles of fibers is “aligned;” and (2) at least one gel layer, wherein the at least one layer of microfibers and the at least one gel layer alternate to form a laminate.

Method and apparatus for manufacturing electrostatically spun structure

Electrostatic spinning method for producing tubular fibrous structures from fiberizable material wherein the fiberizable material is collected on an electrostatically charged mandrel wherein the fiberizable material takes different paths from the source to the mandrel to produce a structure of smaller diameter fibers randomly oriented, larger diameter fibers and/or bundles of fibers circumferentially oriented and elongated voids circumferentially oriented.

Fiber deposit production method, membrane production method, and membrane adhesion method

A fiber collection tool for collecting a fiber spun by electrospinning is described. The fiber collection tool has a size holdable by the hand of a user, and includes, in its interior, an electroconductive section. Preferably, the fiber collection tool further includes a surface section outside the electroconductive section. In a fiber deposit production method, a user collects, with the fiber collection tool, a fiber spun by the user by performing electrospinning using an electrospinning device having a size holdable by the hand of the user, and thereby produces a film including a deposit of the fiber on a surface of the fiber collection tool. The fiber collection tool, having the deposit formed thereon, is pressed against a surface of an object, and the deposit is transferred onto the surface of the object, to form a film including the fiber deposit on the surface of the object.

Способ получения нанонитей, содержащих смесь пентаоксида и диоксида ванадия

Изобретение относится к химической промышленности и нанотехнологии. Раствор пентаоксида ванадия и полимера готовят в два этапа. На первом этапе порошок пентаоксида ванадия растворяют в пероксиде водорода, для чего берут 36,5 мг пентаоксида ванадия на 1 мл пероксида водорода. Полученный раствор фильтруют. На втором этапе в упомянутый раствор добавляют высокомолекулярный поливинилпирролидон из расчета 0,12-0,20 г на 1 мл раствора. Затем проводят электроспиннинг подготовленного раствора при постоянном напряжении 12-18 кВ. Для получения смеси пентаоксида и диоксида ванадия полученные электроспиннингом нанонити отжигают в два этапа: на первом - в воздушной среде при температуре 370-420°С не менее 60 мин, а на втором - в инертной среде в присутствии щавелевой кислоты при температуре 530-570°С не менее 60 мин. Изобретение не только позволяет получить нанонити, содержащие смесь пентаоксида и диоксида ванадия, но и регулировать соотношение этих оксидов путём изменения количества щавелевой кислоты ...

УСТРОЙСТВО ДЛЯ ИЗГОТОВЛЕНИЯ НАНОВОЛОКНА, СПОСОБ ИЗГОТОВЛЕНИЯ НАНОВОЛОКНА И СТРУКТУРА, СФОРМОВАННАЯ ИЗ НАНОВОЛОКНА

Устройство для изготовления нановолокна 10 содержит: средство 11 для впрыскивания прядильного раствора, содержащее токопроводящее сопло 13 для впрыска запаса прядильного раствора для изготовления нановолокна; электрод 14, отстоящий от сопла 13; средство 101 для генерирования напряжения между соплом 13 и электродом 14; средство 15 для подачи воздушной струи, расположенное с возможностью направления воздушной струи между соплом 13 и электродом 14; и средство для сбора нановолокна. Средство 101 для создания напряжения генерирует напряжение таким образом, что сопло 13 служит положительным полюсом, а электрод 14 служит отрицательным полюсом. В целом вся поверхность электрода 14, обращенная к соплу 13, покрыта покрытием 17 с диэлектриком, открытым на поверхности. Диэлектрик, открытый на поверхности, имеет толщину, составляющую 0,8 мм или более. 6 н. и 12 з.п. ф-лы, 9 табл., 17 пр., 33 ил.

TRAGBARE ELEKTROSPINNVORRICHTUNG

Manufacturing vascular prostheses by electrostatic spinning

Apparatus for manufacturing synthetic vascular grafts by an electrostatic spinning process comprises a rotating mandrel (10), an array of capillary needles (11, 12, 13) arranged on a manifold (14) for directing polymer solution towards the mandrel (10) when electrostatically charged, and electrodes (18, 19) for influencing the electrostatic field experienced by the polymer solution. There are means for altering the electrostatic charge of the electrodes (18, 19). ...

Tissue scaffold

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

A structure of aligned (e.g., radially and/or polygonally aligned) fibers, and systems and methods for producing and using the same. One or more structures provided may be created using an apparatus that includes one or more first electrodes that define an area and/or partially circumscribe an area. For example, a single first electrode may enclose the area, or a plurality of first electrode(s) may be positioned on at least a portion of the perimeter of the area. A second electrode is positioned within the area. Electrodes with rounded (e.g., convex) surfaces may be arranged in an array, and a fibrous structure created using such electrodes may include an array of wells at positions corresponding to the positions of the electrodes.

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

A structure of aligned (e.g., radially and/or polygonally aligned) fibers, and systems and methods for producing and using the same. One or more structures provided may be created using an apparatus that includes one or more first electrodes that define an area and/or partially circumscribe an area. For example, a single first electrode may enclose the area, or a plurality of first electrode(s) may be positioned on at least a portion of the perimeter of the area. A second electrode is positioned within the area. Electrodes with rounded (e.g., convex) surfaces may be arranged in an array, and a fibrous structure created using such electrodes may include an array of wells at positions corresponding to the positions of the electrodes.

METHOD FOR THE AMBIENT-TEMPERATURE PRODUCTION OF MICRO- AND NANO-FIBRES OF LIGNIN AND OTHER RESINOUS COMPOUNDS

The invention relates to a method enabling the ambient-temperature spinning of lignins originating from Alcell- and Organosolv-type extraction processes. The invention also relates to a method and device for the ambient-temperature production of lignin fibres of micro- and nanometric diameter, by means of electrospinning and co-electrospinning. The resulting fibres can be single strand (electrospinning) and hollow or coaxial (co-electrospinning) fibres. The lignin fibres are transformed into carbon nanofibres after a suitable heat treatment.

DEVICE FOR PRODUCTION OF NANOFIBRES THROUGH ELECTROSTATIC SPINNING OF POLYMER MATRIX

The principle of the invention is the device for production of nanofibres through electrostatic spinning of polymer matrix in a spinning space, in which against each other there is positioned a collecting electrode and a spinning electrode, between which an electric field of high intensity is induced. Next to this, in the spinning space there is arranged at least one electrical device which is coupled with winding of a transformer (8, 11), which is insulated for high voltage, while the second winding of transformer (8, 11) is connected to the device for generating and/or evaluating of electric voltage pulses positioned outside the spinning space.

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

A structure of aligned (e.g., radially and/or polygonally aligned) fibers, and systems and methods for producing and using the same. One or more structures provided may be created using an apparatus that includes one or more first electrodes that define an area and/or partially circumscribe an area. For example, a single first electrode may enclose the area, or a plurality of first electrode(s) may be positioned on at least a portion of the perimeter of the area. A second electrode is positioned within the area. Electrodes with rounded (e.g., convex) surfaces may be arranged in an array, and a fibrous structure created using such electrodes may include an array of wells at positions corresponding to the positions of the electrodes.

Low-temperature preparation method for zinc oxide nanowire based on electrostatic spinning

Polyimide porous web, method for manufacturing the same, and electrolyte membrane comprising the same

Disclosed is a polyimide porous web with good porosity, good dimensional stability, and uniform pore; a method for manufacturing the same; and an electrolyte membrane with improved ion conductivity and good dimensional stability owing to ion conductors uniformly impregnated in the porous web, the polyimide porous web having a porosity of 60% to 90%, wherein not less than 80% of entire pores of the porous web have a pore diameter which differs from an average pore diameter of the porous web by not more than 1.5 μm.

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

A three-dimensional electrospun nanofiber scaffold for use in repairing a defect in a tissue substrate is provided. The scaffold includes a flexible deposited fiber network of varying density including a first and second set of set of electrospun fibers. The second set of electrospun fibers is coupled to the first. A first portion of the flexible deposited fiber network includes a higher density of fibers than a second portion of the flexible deposited fiber network, and the tensile strength of first portion is higher than that of the second portion. The scaffold is sufficiently flexible to facilitate application of scaffold to uneven surfaces of the tissue substrate, and enables movement of the scaffold by the tissue substrate. The first and second set of fibers are configured to degrade within three months after application, and each fiber of the deposited fiber network has a diameter of 1-1000 nanometers. 1. A three-dimensional electrospun nanofiber scaffold for use in repairing a defect in a tissue substrate , the three-dimensional electrospun nanofiber scaffold comprising: a first set of electrospun fibers comprising a first bioresorbable polymer, wherein the first bioresorbable polymer comprises polyglycolic acid; and', 'a second set of electrospun fibers comprising a second bioresorbable polymer, the second set of fibers coupled to the first set of fibers,', 'wherein the first bioresorbable polymer comprises a different composition from the second bioresorbable polymer,, 'a flexible deposited fiber network of varying density, the deposited fiber network comprisingwherein a first portion of the flexible deposited fiber network comprises a higher density of fibers than a second portion of the flexible deposited fiber network, and wherein the first portion comprises a higher tensile strength than the second portion;wherein the three-dimensional electrospun nanofiber scaffold is sufficiently flexible to facilitate application of the three-dimensional electrospun ...

Polymer Electrospinning Apparatus

The present invention relates to an apparatus for producing electrospun polymer fibres with a modified surface, processes for producing a polymer fibre with a modified surface, non-woven polymer fibre mats or meshes comprising an electrospun polymer fibre, including multi-layered electrospun polymer fibre meshes, and a kit including a directional plasma device. 1. A plasma-electrospinning apparatus comprising a polymer electrospinning device for producing a polymer fibre and a directional plasma device , the directional plasma device being a plasma torch or a plasma plume-generating device , whereby the directional plasma device is arranged so that , during operation , a polymer composition from the polymer electrospinning device passes through a plasma jet or plasma plume from the directional plasma device.2. The plasma-electrospinning apparatus according to claim 1 , wherein the directional plasma device is arranged so the plasma jet or plume extends at an angle more than 0° with respect to the overall direction of the jet of polymer composition along the polymer path from the polymer solution outlet to the polymer fibre collector.3. The plasma-electrospinning apparatus according to claim 1 , wherein the plasma electrode tip is arranged coaxially to the direction of the polymer path from the polymer composition outlet to the polymer fibre collector.4. The plasma-electrospinning apparatus according to claim 3 , wherein the plasma electrode is tubular and forms the gas carrier conduit claim 3 , and the electrospinning capillary tube is located within the gas carrier conduit/plasma electrode.5. A plasma-electrospinning apparatus according to where the polymer electrospinning device comprises at least two different plasma zones claim 1 , whereby the plasma zones are arranged so that claim 1 , during operation claim 1 , the polymer composition from the electrospinning device passes through at least two distinct plasmas.6. The plasma-electrospinning apparatus according ...

METHOD AND APPARATUS FOR ACCUMULATING CROSS-ALIGNED FIBER IN AN ELECTROSPINNING DEVICE

An apparatus for accumulating cross-aligned fiber in an electrospinning device, comprising a multiple segment collector including at least a first segment, a second segment, and an intermediate segment, the intermediate segment positioned between the first and second segment to collectively present an elongated cylindrical structure; at least one electrically chargeable edge conductor circumferentially resident on the first segment and circumferentially resident on the second segment; a connection point on the first segment and on the second segment, the connection points usable for mounting the elongated cylindrical structure on a drive unit to rotate around a longitudinal axis; the elongated cylindrical structure holding electrospun fiber substantially aligned with the longitudinal axis when the edge conductors are excited with a charge of opposite polarity relative to charged fiber, and attracting electrospun fiber on to its surface around the longitudinal axis at least when the edge conductors are absent a charge or grounded. 115-. (canceled)16. A method for accumulating cross-aligned fiber in an electrospinning device , comprising the steps:rotating a multiple segment collector in said electrospinning device, said collector including at least a first segment, a second segment, and an intermediate segment, said intermediate segment positioned between said first segment and said second segment to collectively present an elongated cylindrical structure, said cylindrical structure being rotated around a longitudinal axis proximate to at least one electrically charged fiber emitter;applying an electrical charge to at least one edge conductor circumferentially resident on said first segment, said at least one edge conductor electrically isolated from said intermediate segment, said electrical charge on said edge conductor being an opposite polarity relative to a charge applied to said at least one fiber emitter;applying an electrical charge to at least one edge ...

METHOD AND APPARATUS FOR FABRICATING A MULTIFUNCTION FIBER MEMBRANE

A method and apparatus for fabricating multifunction membranes comprising cross-aligned nanofiber in an electrospinning device, the method comprising providing a multiple segment collector including at least a first segment, a second segment, and an intermediate segment to collectively present an elongated cylindrical structure; electrically charging an edge conductor circumferentially resident on the first segment and on the second segment; rotating the elongated cylindrical structure on a drive unit around a longitudinal axis; the elongated cylindrical structure holding electrospun fiber substantially aligned with the longitudinal axis when the edge conductors are excited with a charge of opposite polarity relative to charged fiber, and attracting electrospun fiber on to its surface around the longitudinal axis at least when the edge conductors are absent a charge or grounded and a charged electrode is positioned opposite a fiber emitter; and repeating the process multiple times to form layers of nanofibers encapsulating agents of interest. 1. A method for fabricating a multifunction fiber membrane , comprising the steps:providing a multiple segment collector in said electrospinning device, said collector including at least a first segment, a second segment, and an intermediate segment, said intermediate segment positioned between said first segment and said second segment to collectively present an elongated cylindrical structure, said cylindrical structure being rotated around a longitudinal axis proximate to at least one electrically charged fiber emitter;applying an electrical charge to at least one edge conductor circumferentially resident on said first segment, said at least one edge conductor electrically isolated from said intermediate segment, said electrical charge on said edge conductor being an opposite polarity relative to a charge applied to said at least one fiber emitter;applying an electrical charge to at least one edge conductor circumferentially ...

BLOWING-ASSISTED ELECTROSPINNING

A method and an apparatus for fabricating nanofibrous articles is disclosed. The method may include providing a double-walled nozzle with an inner tube coaxially disposed within an outer tube. In addition, the double-walled nozzle is secured in front of a collector and an electrical field is applied between a tip of the double-walled nozzle and the collector. The method further includes preparing a spinning solution by dissolving a polymer in a solvent, mixing a vapor stream of the solvent with a stream of a pressurized gas with a predetermined ratio to obtain a pressurized solvent/gas stream feeding the spinning solution through the inner tube of the double-walled nozzle, and concurrently feeding the pressurized solvent/gas stream through the outer tube of the double-walled nozzle. The spinning solution and the pressurized solvent/gas stream may concurrently be discharged from the double-walled nozzle and drawn toward the collector being collected as nanofibrous articles on the collector. 1. A method for fabricating nanofibrous articles , the method comprising:preparing a spinning solution by dissolving a polymer in a solvent;mixing a vapor stream of the solvent with a stream of a pressurized gas at a predetermined ratio to obtain a pressurized solvent/gas stream;feeding the spinning solution through an inner tube of a double-walled nozzle;concurrently feeding the pressurized solvent/gas stream through an outer tube of the double-walled nozzle, wherein the inner tube is disposed coaxially within the outer tube;applying an electrical field between a tip of the double-walled nozzle and a collector, wherein the double-walled nozzle is secured in front of the collector;discharging the spinning solution and the pressurized solvent/gas stream concurrently from the double-walled nozzle; andproducing nanofibrous articles on the collector.2. The method of claim 1 , wherein the inner tube of the double-walled nozzle extends from a tip of the outer tube of the double-walled ...

METHODS AND SYSTEMS FOR ELECTROSPINNING USING LOW POWER VOLTAGE CONVERTER

An electrospinning system, method, and apparatus comprises a dual polarity high voltage power supply with much less power out for safe operation, a solution dispensing assembly held at high positive potential by the dual polarity power supply, a Corona discharge assembly held at high negative potential by the dual polarity power supply, and a drum collector held at ground potential wherein a solution is drawn from the solution dispensing assembly to the drum collector thereby forming a fiber mat. 1. An electrospinning system comprising:a power supply; a dispenser;', 'at least one spike affixed to a rotating cylinder; and', 'a conduit configured to allow a solution to flow through the dispenser; and, 'a circulation assembly connected to the power supply, the circulation assembly comprisinga collector wherein a solution is drawn from the circulation assembly to the collector via a potential difference between the dispenser and collector, forming a fiber mat on the collector.2. The electrospinning system of wherein the circulation assembly comprises:a solution tank;a pump; anda conduit connecting the pump to the dispenser.3. The electrospinning system of wherein the circulation assembly comprises:at least one internal groove formed in the dispenser, wherein the at least one spike affixed to the rotating cylinder passes through the internal groove to contact the solution.4. The electrospinning system of wherein the circulation assembly comprises:at least one slit formed in the dispenser, wherein the at least one spike affixed to the rotating cylinder passes through the slit.5. The electrospinning system of wherein the at least one spike affixed to a rotating cylinder further comprises:an array of spikes formed on the rotating cylinder.6. The electrospinning system of wherein each of the at least one spikes comprise needles.7. The electrospinning system of further comprising:a motor and a drive shaft configured to rotate the rotating cylinder.8. The electrospinning ...

ELECTROSPUN THREE-DIMENSIONAL NANOFIBROUS SCAFFOLDS WITH INTERCONNECTED AND HIERARCHICALLY STRUCTURED PORES

The invention relates to electrospun three-dimensional (3D) nanofibrous scaffolds (with controllable porosities as high as about 96%) and methods of preparing the same. The electrospun 3D scaffolds possess interconnected and hierarchically structured pores with sizes ranging from tens of nanometers to hundreds of micrometers. In embodiments, the 3D scaffolds can be biocompatible and/or biodegradable. In some embodiments, the 3D scaffolds can be conductive. In some embodiments, the 3D scaffolds can contain bioactive species. 1. A method for preparing a three-dimensional nanofibrous scaffold comprising:forming a three-dimensional nanofibrous agglomerate by thermally induced nanofiber self-agglomeration; andfreeze-drying the three-dimensional agglomerate to obtain a three-dimensional nanofibrous scaffold.2. The method of claim 1 , wherein said thermally induced nanofiber self-agglomeration is performed by steps comprising:obtaining a nanofibrous mat;grinding the nanofibrous mat to provide short nanofibers and/or tiny pieces of nanofibrous mat;filtering the short nanofibers and/or tiny pieces of nanofibrous mat;dispersing the short nanofibers and/or tiny pieces of nanofibrous mat into a liquid system;heating the liquid system at a temperature below the melting point of polymer to allow for nanofiber self-agglomeration to form a three-dimensional agglomerate;cooling the liquid system to stop the self-agglomeration.3. The method of claim 2 , wherein the nanofibrous mat is obtained by electrospinning a polymer to form a nanofibrous mat.4. The method of claim 3 , wherein the polymer is biocompatible and/or biodegradable.5. The method of claim 3 , wherein the polymer is selected from the group consisting of polycaprolactone claim 3 , polylactic acid claim 3 , polyglycolic acid claim 3 , poly(lactic-co-glycolic acid) claim 3 , poly(lactic acid-co-caprolactone) claim 3 , polyhydroxyalkanoate claim 3 , poly(3-hydroxybutyrate-co-3-hydroxyvalerate claim 3 , poly(ester urethane) ...

3D POLYMER NANOFIBER MEMBRANE COMPOSED OF 1D INDIVIDUAL POLYMER NANOFIBERS WHICH ARE QUASI-ALIGNED AND CROSS-LAMINATED LIKE GRID STRUCTURE WITH FUNCTIONS OF CONTROLLING PORE DISTRIBUTION AND SIZE, AND MANUFACTURING METHOD THEREOF

Disclosed is a 1D nanofibers quasi-aligned, grid structure cross-laminated, and pore distribution and size controlled 3D polymer nanofiber membrane, and manufacturing method thereof. A 3D polymer nanofiber membrane controlled in pore size and porosity is formed by employing an electrospinning pattern forming apparatus that includes double insulating blocks quasi-aligns nanofibers in a specific direction by transforming an electric field and includes a current collector rotatable in 90°. Additionally, the 3D polymer nanofiber membrane may be used for air filters, separator, water filters, cell culture membranes, and so on by allowing various properties thereto through a functional surface coating. 1. A 3D polymer nanofiber membrane composed of 1D individual polymer nanofibers which are quasi-aligned and cross-laminated like grid structure with functions of controlling pore distribution and size.2. The 3D polymer nanofiber membrane of claim 1 , wherein the 1D polymer nanofibers are ranged in diameters from 50 nm to 5 μm.3. The 3D polymer nanofiber membrane of claim 1 , wherein the 1D polymer nanofibers are ranged in lamination thicknesses from 5 to 200 μm.4. The 3D polymer nanofiber membrane of claim 1 , wherein the 1D polymer nanofibers are orthogonal or parallel each other claim 1 , or at least 80% of the 1D polymer nanofibers are different in angles equal to or less than 10° from adjacent 1D polymer nanofibers.5. The 3D polymer nanofiber membrane of claim 1 , wherein a polymer composed of the 1D polymer nanofibers is one or a mixture with two or more among polyurethane claim 1 , polyurethane copolymer claim 1 , cellulose acetate claim 1 , cellulose claim 1 , acetate butyrate claim 1 , cellulose derivative claim 1 , styrene-acrylonitrile (SAN) claim 1 , polyacrylonitrile (PAN) claim 1 , poly(vinyl acetate) (PVAc) claim 1 , polyvinylpyrrolidone (PVP) claim 1 , polyvinyl alcohol (PVA) claim 1 , polyethylene oxide (PEO) claim 1 , polyacrylic acid (PAA) claim 1 , ...

Biomedical patches with aligned fibers

A structure of aligned (e.g., radially and/or polygonally aligned) fibers, and systems and methods for producing and using the same. One or more structures provided may be created using an apparatus that includes one or more first electrodes that define an area and/or partially circumscribe an area. For example, a single first electrode may enclose the area, or a plurality of first electrode(s) may be positioned on at least a portion of the perimeter of the area. A second electrode is positioned within the area. Electrodes with rounded (e.g., convex) surfaces may be arranged in an array, and a fibrous structure created using such electrodes may include an array of wells at positions corresponding to the positions of the electrodes.

Electrospinning Apparatus and Methods of Use Thereof

The invention relates to an electrospinning apparatus and method of use thereof. 1. An electrospinning apparatus comprising(i) at least one spinneret comprising an electrified tip; and(ii) a collector comprising two rods and a platform connected to the two rods,wherein the two rods are configured to split an electric field between them.2. The electrospinning apparatus of claim 1 , wherein the split electric field is separated by an air insulator.3. The electrospinning apparatus of claim 1 , wherein the two rods are electrified with an opposite charge from the electrified tip.4. The electrospinning apparatus of claim 1 , wherein the two rods are separated from one another by about 1 cm or more.5. The electrospinning apparatus of claim 1 , wherein the two rods are separated from one another from about 1 cm to about 25 cm.6. The electrospinning apparatus of claim 1 , wherein the two rods are separated from one another from about 10 cm to about 20 cm.7. The electrospinning apparatus of claim 1 , wherein the two rods are grounded.8. The electrospinning apparatus of claim 1 , wherein the platform is configured to spin resulting in rotation of the two rods about the spinning axis of the platform.9. The electrospinning apparatus of claim 8 , wherein the platform comprises a bearing connected to the two rods.10. The electrospinning apparatus of claim 9 , wherein the bearing comprises an electrical conductor configured to allow electrical conductance to the two rods.11. The electrospinning apparatus of claim 9 , wherein the bearing comprises mercury.12. The electrospinning apparatus of claim 8 , wherein the two rods are configured to rotate at between 0 and 8000 RPM.13. The electrospinning apparatus of claim 12 , wherein the two rods are configured to rotate at between 0 and 4000 RPM.14. The electrospinning apparatus of claim 1 , wherein the two rods are stationary.15. The electrospinning apparatus of claim 1 , wherein the spinneret is selected from the group consisting of a ...

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

A multi-laminar electrospun nanofiber scaffold for use in repairing a defect in a tissue substrate is provided. The scaffold includes a first layer formed by a first plurality of electrospun polymeric fibers, and a second layer formed by a second plurality of electrospun polymeric fibers. The second layer is combined with the first layer. A first portion of the scaffold includes a higher density of fibers than a second portion of the scaffold, and the first portion has a higher tensile strength than the second portion. The scaffold is configured to degrade via hydrolysis after at least one of a predetermined time or an environmental condition. The scaffold is configured to be applied to the tissue substrate containing the defect, and is sufficiently flexible to facilitate application of the scaffold to uneven surfaces of the tissue substrate, and to enable movement of the scaffold by the tissue substrate. 1. A biomedical patch device for tissue repair , the biomedical patch device comprising:a first structure of fibers having electrospun nanofibers, the first structure of fibers configured to promote cell growth; anda second structure of fibers having electrospun nanofibers, the second structure of fibers configured to promote cell growth,the first structure of fibers comprising a different composition from the second structure of fibers;the biomedical patch device further comprising a surface, wherein the surface comprises a surface pattern configured to contact tissue,the surface pattern, the first structure of fibers, and the second structure of fibers configured to promote cell growth in one or more defined directions,the biomedical patch device sufficiently flexible to facilitate application of the biomedical patch device to uneven surfaces of the tissue,the biomedical patch device sufficiently flexible to enable movement of the biomedical patch device with the tissue, andwherein the first structure of fibers and the second structure of fibers are configured to ...

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

A multi-laminar electrospun nanofiber scaffold for use in repairing a defect in a tissue substrate is provided. The scaffold includes a first layer formed by a first plurality of electrospun polymeric fibers, and a second layer formed by a second plurality of electrospun polymeric fibers. The second layer is combined with the first layer. A first portion of the scaffold includes a higher density of fibers than a second portion of the scaffold, and the first portion has a higher tensile strength than the second portion. The scaffold is configured to degrade via hydrolysis after at least one of a predetermined time or an environmental condition. The scaffold is configured to be applied to the tissue substrate containing the defect, and is sufficiently flexible to facilitate application of the scaffold to uneven surfaces of the tissue substrate, and to enable movement of the scaffold by the tissue substrate. 1. A biomedical patch device for tissue repair , the biomedical patch device comprising: a first plurality of electrospun fibers comprising a first polymer, the first polymer comprising glycolic acid; and', 'a second plurality of electrospun fibers comprising a second polymer, the second polymer comprising caprolactone,', 'the first polymer comprising a different composition from the second polymer;, 'a structure of deposited electrospun fibers comprising a plurality of fibers, the plurality of fibers comprising a first direction substantially parallel to a plane of a surface of the biomedical patch; and', 'a second direction substantially perpendicular to the plane of the surface of the biomedical patch,, 'the plurality of fibers organized in a configuration to promote three-dimensional migration of cells in a plurality of defined directions, the plurality of directions comprisingthe surface of the biomedical patch comprising a surface pattern configured to contact tissue,the biomedical patch device sufficiently flexible to facilitate application of the biomedical ...

APPARATUS AND METHOD FOR FORMING THREE-DIMENSIONAL PATTERN USING ELECTROJETTING

An apparatus and method for forming a three-dimensional (3D) pattern using electrojetting, the apparatus including: a syringe tip having one end from which a polymer jet is discharged; a substrate that is disposed in a direction in which the polymer jet is discharged, and that forms an electric field between the substrate and the syringe tip; and a movement unit that moves the syringe tip or the substrate, wherein the polymer jet discharged from the syringe tip is moved relative to an upper side of the substrate and is stacked on the substrate. 1. An apparatus for forming a three-dimensional (3D) pattern using electrojetting , comprising:a syringe tip including one end from which a polymer jet is discharged;a substrate that is disposed in a direction in which the polymer jet is discharged, and that forms an electric field between the substrate and the syringe tip; anda movement unit that moves the syringe tip or the substrate,wherein the polymer jet discharged from the syringe tip is moved relative to an upper side of the substrate and is stacked on the substrate.2. The apparatus of claim 1 , wherein a distance between the syringe tip and the substrate is greater than 0 and is equal to or less than 200 μm.3. The apparatus of claim 1 , further comprising a voltage supplier that applies a voltage having a certain polarity to the substrate so that the substrate functions with an opposite polarity to that of the syringe tip.4. The apparatus of claim 3 , wherein the voltage supplier controls a magnitude of the voltage applied to the substrate to be 0 or equal to or less than 0.2 kV so that the polymer jet is not discharged from the syringe tip.5. The apparatus of claim 1 , wherein the movement unit vertically moves the syringe tip in an opposite direction to the discharge direction or vertically moves the substrate in the discharge direction so that the polymer jet is not discharged from the syringe tip.6. The apparatus of claim 1 , wherein the movement unit vertically ...

Novel carbon nanofiber and method of manufacture

A method of producing carbon nanofibers is disclosed that substantially impacts the carbon nanofibers' chemical and physical properties. Such carbon nanofibers include a semi-graphitic carbon material characterized by wavy graphite planes ranging from 0.1 nm to 1 nm and oriented parallel to an axis of a respective carbon nanofiber, the semi-graphitic carbon material also being characterized by an inclusion of 4 to 10 atomic percent of nitrogen heteroatoms, the nitrogen heteroatoms including a combined percentage of quaternary and pyridinic nitrogen groups equal to or greater than 60% of the nitrogen heteroatoms. The method of manufacture includes, for example, preparing a Polyacrylonitrile (PAN) based precursor solution, providing the PAN-based precursor solution to a spinneret and then performing an electro-spinning operation on the PAN-based precursor solution to create the one or more PAN-based nanofibers. The electro-spinning operation includes passing the PAN-based precursor solution from the spinneret to a collector at a distance between 1 cm to 30 cm while providing an Alternating Current (AC) voltage between the spinneret and the collector, the AC voltage including a frequency ranging from 20 Hz to 100,000 Hz and either a Peak-to-Peak (P-P) voltage ranging from 100 V to 30,000 V or a Root-Mean-Square (RMS) voltage ranging from 100 V to 30,000 V. Afterwards, post-electro-spinning operations, stabilizing treatments and pyrolysis treatments are performed. 1. A method of producing one or more carbon nanofibers , the carbon nanofibers including a semi-graphitic carbon material characterized by wavy graphite planes ranging from 0.1 nm to 1 nm and oriented parallel to an axis of a respective carbon nanofiber , the semi-graphitic carbon material also being characterized by an inclusion of 4 to 10 atomic percent of nitrogen heteroatoms , the nitrogen heteroatoms including a combined percentage of quaternary and pyridinic nitrogen groups equal to or greater than 60% ...

NANOFIBER PRODUCING APPARATUS AND METHOD OF PRODUCING NANOFIBERS

According to one embodiment, a nanofiber producing apparatus includes a portion to be deposited, an ejection unit, a power supply unit, an inspection unit and an adjusting unit. The portion to be deposited includes a first surface and a second surface. The second surface faces the first surface. The ejection unit ejects a raw material liquid toward the first surface. The power supply unit generates a potential difference between the ejection unit and the first surface. The inspection unit inspects a defect of the first surface. The adjusting unit is provided so as to face the second surface. The adjusting unit generates a potential in the second surface. 1. A nanofiber producing apparatus comprising:a portion to be deposited that includes a first surface and a second surface facing the first surface;an ejection unit that ejects a raw material liquid toward the first surface;a power supply unit that generates a potential difference between the ejection unit and the first surface;an inspection unit that inspects a defect of the first surface; andan adjusting unit that is provided so as to face the second surface, the adjusting unit generating a potential in the second surface.2. The apparatus according to claim 1 , further comprising a control unit that controls the adjusting unit claim 1 ,wherein the control unit determines a position of the adjusting unit with respect to the portion to be deposited based on a defect signal sent from the inspection unit.3. The apparatus according to claim 2 ,wherein the control unit controls the ejection unit and the power supply unit, andthe control unit determines a voltage value applied from the power supply unit and an amount of the raw material liquid ejected from the ejection unit based on the defect signal sent from the inspection unit.4. The apparatus according to claim 3 , wherein the control unit determines a position of the ejection unit with respect to the portion to be deposited based on the defect signal sent from the ...

Melt Differential Electrospinning Device and Process

A melt differential electrospinning device and process, the melt differential electrospinning device comprising a spinning nozzle (), a fiber receiving device (), a first high-voltage electrostatic generator (), a second high-voltage electrostatic generator (), a grounding electrode (), and n layers of electrode plates of a first electrode plate () and a second electrode plate (), n being an integer greater than or equal to 2; the spinning nozzle comprises a splitter plate (), a nut (), a spring spacer (), an air pipe positioning pin (), a screw (), a nozzle body positioning pin (), a nozzle body (), an air pipe (), a heating device (), a temperature sensor () and an inner cone nozzle (). The melt differential electrospinning process employs the melt differential electrospinning device, such that the polymer melt, under the effect of a wind field and an electric field, is uniformly distributed into a circle of dozens of Taylor cones along the conical surface end, and is further formed into dozens of jet flows and refined into nanofibers; and a plurality of melt differential electrospinning nozzles are installed below the splitter plate, thus realizing large-scale production of nanofibers, with a simple structure, and easy machining and assembly of components. 1. A melt differential electrospinning device , comprising:a spinning nozzle;a fiber receiving device;a first high-voltage electrostatic generator, a second high-voltage electrostatic generator and a grounding electrode;n layers of electrode plates including a first electrode plate and a second electrode plate, which are set under the spinning nozzle, with n being an integer greater than or equal to 2;wherein, the first electrode plate is an electrode plate with holes in the middle thereof, the spinning nozzle is connected with the grounding electrode, the first electrode plate is mounted at a certain distance under the spinning nozzle, the first electrode plate is connected with a high-voltage positive ...

NANOFIBER-BASED THERMOELECTRIC GENERATOR MODULE, METHOD FOR MANUFACTURING THE SAME, AND ELECTROSPINNING APPARATUS FOR MANUFACTURING NANOFIBERS THEREFORE

The present invention provides a method of manufacturing a nanofiber-based thermoelectric generator module, the method comprising: an electrode formation step of forming a plurality of electrodes and a plurality of second electrodes so as to be spaced apart from and opposite to each other in an alternately staggered arrangement relative to each other; a first nanofiber arrangement step of arranging a first nonofiber including an n-type or p-type semiconductor; and a second nanofiber arrangement step of arranging a second nonofiber including a semiconductor of a type different from the type of the semiconductor forming the first nanofiber, a nanofiber-based thermoelectric generator module manufactured by the method, and an electrospinning apparatus of manufacturing nanofibers for the nanofiber-based thermoelectric generator module. 1. A method of manufacturing a nanofiber-based thermoelectric generator module , the method comprising:an electrode formation step of forming a plurality of electrodes and a plurality of second electrodes so as to be spaced apart from and opposite to each other in an alternately staggered arrangement relative to each other;a first nanofiber arrangement step of arranging a first nonofiber including an n-type or p-type semiconductor, the first nanofiber being connected at one end thereof to the first electrode and connected at the other end thereof to a second electrode which is opposite to the first electrode; anda second nanofiber arrangement step of arranging a second nonofiber including a semiconductor of a type different from the type of the semiconductor forming the first nanofiber, the second nanofiber being connected at one end thereof to the first electrode and connected at the other end thereof to another second electrode which is opposite to the first electrode.2. The method according to claim 1 , wherein the first nanofiber arrangement step comprises:a first nanofiber pattern formation step of forming a first nanofiber pattern ...

Device and method to produce nanofibers and constructs thereof

The present invention relates to a device and a method for producing polymer fibers, in particular to nozzle-less electrospinning devices and methods to produce fibers and constructs thereof, wherein the nanofibers are generated by using pulsed and/or bursted ultrasound. 1. A device for producing polymer fiber , the device comprising ,an open chamber for a polymer medium,a voltage generating means including an electrode positioned in the open chamber, the voltage generating means configured to apply a voltage to the polymer medium,an ultrasound beam generating means including a signal generating means and an ultrasound transducer, wherein the signal generating means is configured to generate an ultrasound beam driving signal and wherein the ultrasound beam driving signal includes at least one of a pulse and a burst, andan electrically isolating and acoustically conducting membrane arranged between the open chamber and the ultrasound transducer.2. The device according to claim 1 , wherein the signal generating means further comprises a means configured to modify one or more of: a transducer voltage claim 1 , a transducer pulse/burst duration claim 1 , a transducer pulse repetition frequency claim 1 , a transducer frequency content claim 1 , a transducer signal acoustic linearity/non-linearity and transducer signal characteristics.3. The device according to claim 1 , wherein the device further comprises a sealed chamber between the membrane and the ultrasound transducer claim 1 , the sealed chamber including an electrically isolating and acoustically conducting material.4. The device according to claim 3 , wherein the device further comprises a means configured to circulate and/or to change the electrically isolating and acoustically conducting material in the sealed chamber.5. The device according to claim 3 , wherein the electrically isolating and acoustically conducting material is selected from oil claim 3 , and solid epoxy polymer.6. The device according to claim ...

AN ALTERNATING FIELD ELECTRODE SYSTEM AND METHOD FOR FIBER GENERATION

An electrode system for use in an AC-electrospinning process comprises an electrical charging component electrode and at least one of an AC field attenuating component and a precursor liquid attenuating component. The electrical charging component electrode is electrically coupled to an AC source that places a predetermined AC voltage on the electrical charging component electrode. In cases in which the electrode system includes the AC field attenuating component, it attenuates the AC field generated by the electrical charging component electrode to better shape and control the direction of the fibrous flow. In cases in which the electrode system includes the precursor liquid attenuating component, it serves to increase fiber generation, even if the top surface of the liquid precursor is not ideally shaped or is below a rim or lip of the reservoir that contains the liquid on the electrical charging component electrode. 1. An electrode system for use in an alternating current (AC)-electrospinning system , the electrode system comprising:an electrical charging component electrode, the electrical charging component electrode being electrically coupled to an AC source that delivers an AC signal to the electrical charging component electrode to place a predetermined AC voltage on the electrical charging component electrode; andat least one of an AC field attenuating component and a precursor liquid attenuating component.2. The electrode system of claim 1 , wherein the electrode system comprises the AC field attenuating component claim 1 , but not the precursor liquid attenuating component claim 1 , and wherein the predetermined AC voltage is also placed on the AC field attenuating component claim 1 , and wherein the AC field attenuating component attenuates an AC field created by the placement of the predetermined AC voltage on the electrical charging component electrode.3. The electrode system of claim 2 , wherein the electrical charging component electrode is doughnut- ...

Electrospinning apparatus and nanofibers produced therefrom

Provided herein are gas and/or temperature assisted electrospinning apparatus, processes, components and polymer nanofibers.

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

A structure of aligned (e.g., radially and/or polygonally aligned) fibers, and systems and methods for producing and using the same. One or more structures provided may be created using an apparatus that includes one or more first electrodes that define an area and/or partially circumscribe an area. For example, a single first electrode may enclose the area, or a plurality of first electrode(s) may be positioned on at least a portion of the perimeter of the area. A second electrode is positioned within the area. Electrodes with rounded (e.g., convex) surfaces may be arranged in an array, and a fibrous structure created using such electrodes may include an array of wells at positions corresponding to the positions of the electrodes. 1. (canceled)2. A fiber structure for repairing a void in a biological tissue , the fiber structure comprising an a set of one or more inner point(s) , a set of one or more inner area(s) extending from the one or more inner point(s) to a set of one or more inner perimeter(s) , and a set of one or more outer area(s) extending from the one or more inner perimeter(s) to a set of one or more outer perimeter(s) , wherein the one or more inner area(s) and the one or more outer area(s) at least partially overlap , the fiber structure comprising a first set of one or more substantially straight polymeric fiber sections extending from the inner point(s) to the inner perimeter(s) , and a second set of one or more substantially straight polymeric fiber sections extending from the inner perimeter(s) to the outer perimeter(s) ,wherein a spatial fiber density of the one or more inner area(s) is substantially the same as a spatial fiber density of the one or more outer area(s),wherein each of the first set of one or more of substantially straight polymeric fiber sections and the second set of one or more of substantially straight polymeric fiber sections comprise one or more fiber sections generated by depositing via electrospinning a first polymer ...

MANUFACTURING GRADIENT MATERIALS USING MAGNETICALLY-ASSISTED ELECTROSPINNING

Described are fibrous materials comprising a plurality of fibers having a longitudinal alignment gradient and/or a longitudinal composition gradient. Also described are methods of preparing the fibrous materials thereof and methods of treating organ or tissue damage with the fibrous materials. 1. A fibrous material comprising a plurality of polymer fibers , wherein the plurality of fibers has a longitudinal alignment gradient of more than 70% aligned to less than 35% aligned.2. The fibrous material of claim 1 , wherein the fibrous material has a longitudinal composition gradient.3. The fibrous material of claim 1 , wherein the plurality of polymer fibers comprises a polymer selected from the group consisting of hyaluronic acid claim 1 , polyethylene oxide claim 1 , polyglycolic acid claim 1 , polylactic acid claim 1 , PLGA claim 1 , polyolefin claim 1 , polyacrylonitrile claim 1 , polyurethane claim 1 , polycarbonate claim 1 , polycaprolactone claim 1 , polyvinyl alcohol claim 1 , cellulose claim 1 , silk claim 1 , polyaniline claim 1 , polystyrene claim 1 , chitosan claim 1 , nylon claim 1 , and combinations thereof.4. The fibrous material of claim 1 , wherein the polymer fiber comprises a metal nanoparticle.5. The fibrous material of claim 1 , wherein the fibrous material comprises a biomolecule claim 1 , a drug molecule or a combination thereof.6. The fibrous material of claim 1 , wherein the plurality of fibers has an average diameter of less than 5 μm.7. The fibrous material of claim 1 , wherein the plurality of polymer fibers comprises a first fiber and a second fiber.8. The fibrous material of claim 8 , wherein the first fiber and/or the second fiber is present at about 0.1% to about 95% by weight.9. The fibrous material of claim 8 , further comprising a third fiber.10. The fibrous material of claim 1 , wherein the longitudinal composition gradient comprises a biomolecule claim 1 , a drug molecule or a combination thereof.11. A method of preparing a fibrous ...

SYNTHETIC FILL MATERIALS HAVING COMPOSITE FIBER STRUCTURES

In some embodiments, the inventive subject matter relates to a fiber construct suitable for use as a fill material for insulation or padding, comprising: a primary fiber structure comprising a predetermined length of fiber; a secondary fiber structure, the secondary fiber structure comprising a plurality of relatively short loops spaced along a length of the primary fiber. In some embodiments, the inventive subject matter relates to insulative fiber structures that mimic the structure and scale of natural down and thereby provide similar properties. 1. A system for making a fiber construct , comprising:a first ejector coupled to a supply source for holding a flowable, fiber forming material for a primary fiber or secondary fiber;the first ejector being movable in a predetermined pattern relative to a second ejector for the other of primary fiber or secondary fiber so as to be capable of creating a composite fiber structure of the primary fiber and secondary fiber, and wherein in the predetermined pattern, the secondary fiber is disposed on the primary fiber in the plurality of loops; anda segmentation apparatus capable of segmenting the composite fiber into smaller units of fiber constructs wherein the average length of the segmented primary fiber is between 0.1 mm to 5 cm.2. The system of claim 1 , wherein the average length of the segmented primary fiber is between 5 mm to 70 mm.3. The system of claim 1 , wherein each loop of the plurality of loops consists of a single monofilament fiber and has a pair of spaced apart intersection points with the primary fiber claim 1 , wherein each of the intersection points of the primary fiber and the single monofilament fiber is spaced apart along a length of the primary fiber from the other intersection points of the primary fiber and the single monofilament fiber.4. The system of claim 3 , further comprising rollers configured to couple the primary fiber and the secondary fiber together at the intersection points by at least ...

Method of Manufacturing a Bundle of Electrospun Yarn and Manufacturing Equipment for the Same

An equipment of manufacturing a bundle of electrospun yarn has a vortex containing device and a bundles collecting device. The vortex containing device has a feeding end, an exporting end and a vortex generator. The vortex generator is mounted in and communicates with the vortex containing device to form a fluid vortex in the vortex containing device to provide a guiding force. The guiding force draws an electrospun fiber into the feeding end of the vortex containing device. The electrospun fiber is wound to form a bundle of electrospun yarn by the fluid vortex. The bundles collecting device is rotated to collect the bundle of electrospun yarn. 1. A manufacturing equipment for a bundle of electrospun yarn comprising a vortex containing device and a bundles collecting device , the vortex containing device having a feeding end , an exporting end and a vortex generator , the vortex generator being mounted in and communicating with the vortex containing device to form a fluid vortex in the vortex containing device to provide a guiding force to the vortex containing device , the guiding force lead an electrospun fiber continuously into the vortex containing device to wind to form a bundle of electrospun yarn , and the bundles collecting device rotatably connected to the vortex containing device to collect the bundle of electrospun yarn that is drawn out of the exporting end of the vortex containing device.2. The manufacturing equipment as claimed in claim 1 , wherein a winding speed of the bundles collecting device is between 20 cm/min˜300 cm/min to provide different diameters of the bundle of electrospun yarn.3. The manufacturing equipment as claimed in claim 1 , whereinthe manufacturing equipment has at least one electrospun device mounted above the vortex containing device; a bottom end; and', 'an electrospun liquid/melt stored in the at least one electrospun device, flowed out of the at least one electrospun device via the bottom end of the at least one electrospun ...

ULTRAFINE FIBER PRODUCTION METHOD

A method for producing ultrafine fibers of the present invention includes forming an electric field between an discharging nozzle from which a raw resin is discharged and a charging electrode which is disposed apart from the discharging nozzle, and supplying the raw resin which has been heated and melted into the electric field from the discharging nozzle to spin the raw resin. The raw resin is a resin mixture which contains a resin having a melting point and an additive, and satisfies a relation (I) below: 1. A method for producing ultrafine fibers , the method comprising:forming an electric field between a discharging nozzle from which a raw resin is discharged and a charging electrode which is disposed apart from the discharging nozzle, and supplying the raw resin which has been heated and melted into the electric field from the discharging nozzle to spin the raw resin, {'br': None, 'i': 'A/B≥', 'sup': '2', '1.0×10\u2003\u2003(I)'}, 'wherein the raw resin is a resin mixture which contains a resin having a melting point and an additive, and satisfies a relation (I) belowwherein A represents an absolute value (Ω) of electrical impedance of the raw resin at 50° C., andB represents an absolute value (Ω) of electrical impedance of the raw resin at a temperature 50° C. higher than a melting point of the raw resin.2. The method for producing ultrafine fibers according to claim 1 , wherein the discharging nozzle is earthed claim 1 , and the charging electrode is connected to a high-voltage generator.3. The method for producing ultrafine fibers according to claim 1 , wherein a collecting portion which collects fibers of the raw resin is disposed separately from the discharging nozzle and the charging electrode claim 1 , and the collecting portion is electrically connected.4. The method for producing ultrafine fibers according to claim 1 , wherein the method further comprising:preparing the raw resin by heating and melting the resin and the additive, followed by mixing the ...

Electrospun Fibers, Mats, and Methods of Making Fibers and Mat

Disclosed herein are methods of forming a fiber mat, involving forming an aqueous solution of at least one protein, at least one polysaccharide, and optionally a plasticizer, and electrospinning the aqueous solution onto a collector to form a mat.

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

A structure of aligned (e.g., radially and/or polygonally aligned) fibers, and systems and methods for producing and using the same. One or more structures provided may be created using an apparatus that includes one or more first electrodes that define an area and/or partially circumscribe an area. For example, a single first electrode may enclose the area, or a plurality of first electrode(s) may be positioned on at least a portion of the perimeter of the area. A second electrode is positioned within the area. Electrodes with rounded (e.g., convex) surfaces may be arranged in an array, and a fibrous structure created using such electrodes may include an array of wells at positions corresponding to the positions of the electrodes. 1. An artificial dura mater comprising at least a hydrophobic and biodegradable electrospun layer , wherein said layer comprises (a) at least one synthetic biomedical polymer and (b) fibers with a diameter of 1-1000 nm.2. The artificial dura mater according to claim 1 , wherein the polymer is selected from the group consisting of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) claim 1 , poly(lactic acid) (PLA) claim 1 , polyglycolic acid (PGA) claim 1 , PLA-PCL-PGA ternary copolymers claim 1 , hydroxyethyl-methacrylate hydrogel claim 1 , poly(ϵ-caprolactone) claim 1 , and combinations thereof.3. The artificial dura mater according to claim 1 , wherein the polymer is poly(lactic acid).4. The artificial dura mater according to claim 1 , wherein the artificial dura mater comprises at least two layers.5. The artificial dura mater according to claim 1 , wherein the artificial dura mater is in the form of a hydrogel.6. The artificial dura mater according to claim 1 , wherein the nanofibers have a diameter of from about 215 to about 225 nanometers.7. The artificial dura mater according to claim 1 , wherein the artificial dura mater further comprises a biological agent claim 1 , a growth factor claim 1 , a drug or a combination thereof.8. The ...

ELECTROSPINNING DEVICE

The present invention relates to an electrospinning device. The electrospinning device may apply the force of a supersonic flow acting at a predetermined angle with respect to an electrostatic force on a fiber discharged from an electrospinning nozzle to cause shearing stress on the fiber, thereby providing fibers having a very small diameter and collecting fibers having a finer diameter. Also, the electrospinning device may collect finer and more uniform fibers by adjusting the relative positions of the electrospinning nozzle for discharging the fiber and a gas spray nozzle for spraying a gas. 1. An electrospinning device comprising:an electrospinning nozzle configured to discharge a polymer spinning solution by being applied with a high voltage in such a manner that the polymer spinning solution forms a fiber;a high voltage generator configured to apply a high voltage to the electrospinning nozzle;a ground power source configured to form an electric field in a space between the electrospinning nozzle and the ground power source so that the fiber discharged from the electrospinning nozzle is induced to flow in a predetermined direction by an electrostatic force;a gas spray nozzle configured to spray a gas in one direction;a collector configured to collect the fiber discharged from the electrospinning nozzle thereon,wherein the collector is disposed at a position opposed to that of the gas spray nozzle along the flow direction of the gas sprayed from the gas spray nozzle, and the fiber discharged from the electrospinning nozzle is collected on the collector by the flow force of the gas sprayed from the gas spray nozzle.2. The electrospinning device according to claim 1 , wherein the ground power source is connected to the gas spray nozzle so that the fiber discharged from the electrospinning nozzle is induced to flow toward the gas spray nozzle by the electrostatic force.3. The electrospinning device according to claim 1 , wherein the ground power source is ...

NOVEL CARBON NANOFIBER AND METHOD OF MANUFACTURE

A method of producing carbon nanofibers is disclosed that substantially impacts the carbon nanofibers' chemical and physical properties. Such carbon nanofibers include a semi-graphitic carbon material characterized by wavy graphite planes ranging from 0.1 nm to 1 nm and oriented parallel to an axis of a respective carbon nanofiber, the semi-graphitic carbon material also being characterized by an inclusion of 4 to 10 atomic percent of nitrogen heteroatoms, the nitrogen heteroatoms including a combined percentage of quaternary and pyridinic nitrogen groups equal to or greater than 60% of the nitrogen heteroatoms. The method of manufacture includes, for example, preparing a Polyacrylonitrile (PAN) based precursor solution, providing the PAN-based precursor solution to a spinneret and then performing an electro-spinning operation on the PAN-based precursor solution to create the one or more PAN-based nanofibers. The electro-spinning operation includes passing the PAN-based precursor solution from the spinneret to a collector at a distance between 1 cm to 30 cm while providing an Alternating Current (AC) voltage between the spinneret and the collector, the AC voltage including a frequency ranging from 20 Hz to 100,000 Hz and either a Peak-to-Peak (P-P) voltage ranging from 100 V to 30,000 V or a Root-Mean-Square (RMS) voltage ranging from 100 V to 30,000 V. Afterwards, post-electro-spinning operations, stabilizing treatments and pyrolysis treatments are performed. 1. A method of producing one or more carbon nanofibers , the carbon nanofibers including a semi-graphitic carbon material characterized by wavy graphite planes ranging from 0.1 nm to 1 nm and oriented parallel to an axis of a respective carbon nanofiber , the semi-graphitic carbon material also being characterized by an inclusion of 4 to 10 atomic percent of nitrogen heteroatoms , the nitrogen heteroatoms including a combined percentage of quaternary and pyridinic nitrogen groups equal to or greater than 60% ...

Electrospinning device and method

An electrospinning device () is provided comprising: 1. An electrospinning device comprising:a container for holding a liquid comprising a polymer melt or a polymer solution;a nozzle arranged to outlet a stream of the liquid from the container;a collecting surface for collecting electro spun material coming from the nozzle during an electrospinning process so as to form a fibrous structure on the collecting surface;a voltage supply system arranged to create a voltage difference between the nozzle and the collecting surface,one or more electrostatic emitters arranged to locally distribute positive and/or negative ions onto the fibrous structure, andone or more rotatable bodies arranged to cause the collecting surface to face the nozzle and the electrostatic emitters in turn213064. The electrospinning device (; ) according to claim 1 , wherein the device comprises a rotatable cylindrical body () claim 1 , the surface of which forms the collecting surface ().3. The electrospinning device according to claim 1 , wherein the device comprises at least two rotatable bodies claim 1 , and a looped conveyer belt arranged around the two rotatable bodies claim 1 , wherein the surface of the belt forms the collecting surface.4. The electrospinning device according to claim 1 , wherein the collecting surface is arranged between the nozzle and the one or more electrostatic emitters.5. The electrospinning device according to claim 1 , wherein the electrostatic emitters are arranged in a row.6. The electrospinning device according to claim 5 , wherein the electrostatic emitters are arranged in an array.7. The electrospinning device according to claim 1 , wherein the electrostatic emitters are movable in a direction parallel to a rotation axis of the rotatable body or bodies.8. The electrospinning device according to claim 1 , wherein the electrostatic emitters comprise ion generators.9. The electrospinning device according to claim 1 , wherein the device comprises a control unit ...

ELECTRO HYDRODYNAMIC PRODUCTION METHOD AND SYSTEM

An improved electro hydrodynamic method is provided. The method comprises arranging () an electro hydrodynamic device inside an enclosure and distributing () positive and/or negative ions inside the enclosure during a charging period with a certain defined amount of power. The distribution of the positive and/or the negative ions inside the enclosure () is performed so that a predefined amount of charge is set on the interior of the enclosure (). Within a predetermined period of time after the charging period has ended, the electrospinning device is activated so as to create a product. Finally, the product is removed from the device. The present invention offers a solution for the problem of non-identical initial process conditions for an electro hydrodynamic process caused by any electric charges on the equipment. 1. An electro hydrodynamic production method , the method comprising:arranging an electro hydrodynamic device inside an enclosure;distributing positive and/or negative ions inside the enclosure during a charging period with a certain defined amount of power, wherein the distribution of the positive and/or the negative ions inside the enclosure is performed so that a predefined amount of charge is set on the interior of the enclosure;within a predetermined period of time after the charging period has ended, activating the electrospinning device so as to create a product;removing the product from the device.2. The method according to claim 1 , wherein the second claim 1 , third and fourth step of the method are repeated to create multiple products.3. The method according to claim 1 , wherein the method comprises:measuring charge on the electrohydrodynamic device and/or the enclosure, to obtain a charge parameter indicative of a measured charge;controlling the distribution of the positive and negative ions, using the charge parameter.4. The method according to claim 1 , wherein the method further comprises alternately generating the positive and negative ...

Method for Retrovirus Removal

A method for removing retroviruses from liquid samples and a nanofiber containing liquid filtration medium that simultaneously exhibits high liquid permeability and high microorganism retention is disclosed. Retroviruses are removed from a liquid by passing the liquid through a porous nanofiber containing filtration medium having a retrovirus LRV greater than about 6, and the nanofiber(s) has a diameter from about 10 nm to about 100 nm. The filtration medium can be in the form of a fibrous electrospun polymeric nanofiber liquid filtration medium mat. 1. A porous nanofiber filtration medium for removing retroviruses from a liquid sample , resulting in the full retention of retroviruses , comprising:a porous nanofiber filtration medium having a retrovirus Log Reduction Value (LRV) greater than about 6, a porosity from about 80% to about 95%, and a liquid permeability greater than about 100 LMH/psi,wherein the nanofiber has a fiber diameter from about 10 nm to about 100 nm.2. The medium of claim 1 , further comprising a mean flow bubble point claim 1 , as tested with isopropanol claim 1 , from about 100 to about 150 psi.3. The medium of claim 1 , having a thickness from about 1 um to about 500 um.4. The medium of claim 1 , having a thickness from about 1 um to about 50 um.5. The medium of claim 1 , formed by a process selected from the group consisting of electrospinning and electroblowing.6. The medium of claim 1 , wherein the retrovirus is Human Immunodeficiency Virus (HIV).7. The medium of claim 1 , wherein the retrovirus is Human T-cell leukemia virus (HTLV).8. The medium of claim 1 , wherein the nanofiber comprises a polymer selected from the group consisting of polyimide claim 1 , aliphatic polyamide claim 1 , aromatic polyamide claim 1 , polysulfone claim 1 , cellulose acetate claim 1 , polyether sulfone claim 1 , polyurethane claim 1 , poly(urea urethane) claim 1 , polybenzimidazole claim 1 , polyetherimide claim 1 , polyacrylonitrile claim 1 , poly(ethylene ...

ALIGNED FIBER AND METHOD OF USE THEREOF

A scaffold comprising an aligned fiber. Further, a scaffold comprising one or more electrospun fibers wherein a fast Fourier transform (FFT) analysis result of the fibers have adjacent major peaks with about 180° apart from each other. Also, methods for promoting differentiation of stem cells into osteoblasts, chondrocytes, ligament or tendon, the method comprising culturing the cells on the scaffold or aligned fiber in conditions suitable for the cell differentiation. 124-. (canceled)25. A method of treating a tissue defect comprising applying a scaffold comprising one or more electrospun fibers , wherein a fast Fourier transform (FFT) analysis result of the fibers have adjacent major peaks with about 180° apart from each other , and wherein the scaffold is in a form of one or more elongated sheets , to surround the tissue defect.26. A method of treating a tissue defect or gap comprising applying a scaffold comprising one or more electrospun fibers , wherein a fastlourier transform (FFT) analysis result of the fibers have adjacent major peaks with about 180° apart from each other , and wherein the scaffold is in the form of one or more elongated rolls , between the tissue defect or gap.27. A method of cell culture comprising culturing cells on a scaffold comprising one or more electrospun fibers , wherein a fast Fourier transform (FFT) analysis result of the fibers have adjacent major peaks with about 180° apart from each other in conditions suitable for the cell culture.28. The method of claim 27 , wherein the cells are selected from the group consisting of stem cells claim 27 , adipose derived stem cells claim 27 , dental pulp stem cells claim 27 , fibroblasts claim 27 , and dorsal root ganglia29. The method of claim 27 , wherein the cells are dorsal root ganglia.30. The method of claim 27 , wherein the cells are dorsal root ganglia claim 27 , and the fibers comprise heart basement membrane extract claim 27 , heart basement membrane extracellular matrix claim 27 ...

SYNTHETIC FILL MATERIALS HAVING COMPOSITE FIBER STRUCTURES

In some embodiments, the inventive subject matter relates to a fiber construct suitable for use as a fill material for insulation or padding, comprising: a primary fiber structure comprising a predetermined length of fiber; a secondary fiber structure, the secondary fiber structure comprising a plurality of relatively short loops spaced along a length of the primary fiber. In some embodiments, the inventive subject matter relates to insulative fiber structures that mimic the structure and scale of natural down and thereby provide similar properties 1. A bulk fill material , comprising a plurality of fiber constructs having sufficient loft and recovery so as to be suitable for padding and/or insulating applications , each construct comprising:a primary fiber structure comprising a predetermined length of fiber; anda secondary fiber structure, the secondary fiber structure comprising a plurality of loops spaced along a length of the primary fiber, the primary fiber structure and the secondary fiber structure being coupled together by bonding of materials, free of mechanical fasteners.2. The bulk fill material of wherein the primary fiber has a length of 0.1 mm to 5 cm claim 1 , or thereabout.3. The bulk fill material of wherein the primary fiber length is between 5 mm to 70 mm claim 2 , or thereabout.4. The bulk fill material of wherein the primary fiber has more than 20 loops.5. The bulk fill material of wherein the secondary fiber intersection points with the primary fiber are spaced from 10 μm to 150 μm apart claim 4 , or thereabout.6. The bulk fill material of wherein the secondary fiber loops have a maxima of 5 mm or less.7. The bulk fill material of wherein the secondary fiber loops have a maxima of between 100 μm to 1 mm claim 4 , or thereabout.8. The bulk fill material of wherein the secondary fiber loops have a maxima of between 300 μm-1000 μm claim 4 , or thereabout.9. (canceled)10. (canceled)11. The bulk fill material of wherein the primary fiber has a ...

Negative Polarity on the Nanofiber Line

A centrifugal spinning system and method for forming a fibrous web containing nanofibers, microfibers, or a combination thereof from a molten polymer composition or an aqueous spinning solution is provided. Through careful control over the arrangement of the system, a fibrous web can be formed that is relatively defect free. To help accomplish this feature, at least two centrifugal spinning chambers, each containing a charged forming plate, are utilized. To minimize the present of defects in the fibrous web, the charge applied to the first spinning chamber has a polarity that is opposite the polarity of the charge applied to the second spinning chamber. 1. A fiber-forming system for forming a fibrous web , the system comprising:a collection surface;a first fiber-forming device comprising a charged first forming plate positioned beneath the collection surface; anda second fiber-forming device comprising a charged second forming plate positioned beneath the collection surface, wherein the first forming plate and the second forming plate exhibit opposing charge polarities.2. The fiber-forming system of claim 1 , wherein the first fiber-forming device is a first centrifugal spinning chamber comprising a first rotating spin disk claim 1 , and the second fiber-forming device is a second centrifugal spinning chamber comprising a second rotating spin disk.3. The fiber-forming system of claim 1 , further comprising a first voltage source claim 1 , wherein the first voltage source is coupled to the first forming plate.4. The fiber-forming system of claim 1 , further comprising a second voltage source claim 1 , wherein the second voltage source is coupled to the second forming plate.5. The fiber-forming system of claim 1 , wherein the first forming plate and the second forming plate are perforated.6. The fiber-forming system of claim 1 , wherein the first forming plate has a positive charge and the second forming plate has a negative charge.7. The fiber-forming system of claim ...

METHOD AND APPARATUS FOR CONTROLLING FIBER CROSS-ALIGNMENT IN A NANOFIBER MEMBRANE

A method for controlling fiber cross-alignment in a nanofiber membrane, comprising: providing a multiple segment collector in an electrospinning device including a first and second segment electrically isolated from an intermediate segment positioned between the first and second segment, collectively presenting a cylindrical structure, rotating the cylindrical structure around a longitudinal axis proximate to an electrically charged fiber emitter; electrically grounding or charging edge conductors circumferentially resident on the first and second segment, maintaining intermediate collector electrically neutral; dispensing electrospun fiber toward the collector, the fiber attaching to edge conductors and spanning the separation space between edge conductors; attracting electrospun fiber attached to the edge conductors to the surface of the cylindrical structure, forming a first fiber layer; increasing or decreasing rotation speed of the cylindrical structure to alter the angular cross-alignment relationship between aligned nanofibers in adjacent layers, the rotation speed being altered to achieve a target relational angle. 1. A method for controlling fiber cross-alignment in a nanofiber membrane comprising the steps:providing a multiple segment collector in an electrospinning device, said collector including at least a first segment, a second segment, and an intermediate segment, said intermediate segment positioned between said first segment and said second segment to collectively present an elongated cylindrical structure, said cylindrical structure being rotated around a longitudinal axis proximate to at least one electrically charged fiber emitter;electrically grounding or charging at least one edge conductor circumferentially resident on said first segment while maintaining said intermediate collector electrically neutral, said at least one edge conductor electrically isolated from said intermediate segment, said electrical charge on said edge conductor when ...

MULTI-PHASE, VARIABLE FREQUECY ELECTROSPINNER SYSTEM

An apparatus for producing a fibrous material. The apparatus uses a first material source within which is disposed a first material and a second material source enclosing a second material. The first and second materials to be electrospun. A first and second tip attached to an end of the first and second material sources, with a collector spaced apart from the first and second material sources. A first and second electric field generator each produces a first and second signal each in the form of a sine wave and having a first and second frequency. The fibers are formed from the first and second materials as extracted from the respective first and second tips responsive to a first and second electric field generated between the respective first and second tips and the collector. 1. An apparatus for producing a fibrous material , comprising:a material source, a material to be electrospun disposed within the material source:a tip attached to an end of the material source;a collector spaced apart from the material source;an electric field generator producing a sine wave as a function of time and a frequency of the sine wave variable as a function of time; andthe apparatus for electrospinning fibers formed from the material as extracted from the tip responsive to an electric field generated by the electric filed generator between the tip and the collector.2. The apparatus of the collector configured to receive the fibers from the tip.3. The apparatus of further comprising a rotary mechanism configured to rotate at least one of the material source and the collector around a longitudinal axis defined by the material source.4. The apparatus of wherein the rotary mechanism is configured to rotate both the collector and the collector at different angular speeds.5. The apparatus of claim 3 , wherein the rotary mechanism is configured to rotate the material source and the collector in opposite angular directions.6. The apparatus of wherein the material source comprises a ...

Biomedical patches with aligned fibers

A multi-laminar electrospun nanofiber scaffold for use in repairing a defect in a tissue substrate is provided. The scaffold includes a first layer formed by a first plurality of electrospun polymeric fibers, and a second layer formed by a second plurality of electrospun polymeric fibers. The second layer is combined with the first layer. A first portion of the scaffold includes a higher density of fibers than a second portion of the scaffold, and the first portion has a higher tensile strength than the second portion. The scaffold is configured to degrade via hydrolysis after at least one of a predetermined time or an environmental condition. The scaffold is configured to be applied to the tissue substrate containing the defect, and is sufficiently flexible to facilitate application of the scaffold to uneven surfaces of the tissue substrate, and to enable movement of the scaffold by the tissue substrate.

DUAL DENSITY NANOFIBER MEDIA

The present invention generally relates to a dual density air filtration media that comprises a plurality of nanofibers layers formed from nanofibers having different fiber diameters. Due to the presence of these multiple nanofiber layers with different nanofiber diameters, the resulting filtration media of the present invention comprises a gradient density. In particular, the present invention uses a novel combination of two or more layers of nanofibers made via an electrospinning process, wherein the nanofiber layers made up from different fiber sizes are strategically applied to a cellulose or synthetic base material or substrate, to thereby maximize the filtration efficiency and dust holding capacity of the resulting filtration media. 1. A gradient filtration media , said filtration media comprising:(a) a filtration media substrate comprising a first influent surface and a first effluent surface;(b) a first nanofiber layer comprising a first nanofiber, wherein said first nanofiber layer comprises a second influent surface and a second effluent surface, wherein said first nanofiber layer at least partially coats said first influent surface of said filtration media substrate, wherein said first nanofiber comprises an average diameter of less than 1,000 nm; and(c) a second nanofiber layer comprising a second nanofiber, wherein said second nanofiber layer at least partially coats said second influent surface of said first nanofiber layer, wherein said second nanofiber comprises an average diameter that is greater than the average diameter of said first nanofiber.2. The gradient filtration media of claim 1 , wherein said first nanofiber layer and/or said second nanofiber layer are electrospun.3. The gradient filtration media of claim 2 , wherein said first nanofiber comprises an average diameter of at 1 nm and less than 700 nm claim 2 , wherein said second nanofiber comprises an average diameter of at least 250 nm.4. The gradient filtration media of claim 1 , wherein ...

GLOSSY MEMBER AND METHOD OF PRODUCING THE MEMBER

Provided is a glossy member, including: a polymer substrate; and a polymer fiber assembly disposed on the polymer substrate, in which: the polymer fiber assembly has polymer fibers oriented in a given direction; an absolute value of a difference between an average solubility parameter of a constituent material for the polymer substrate and an average solubility parameter of a polymer material of the polymer fibers is less than 5 (J/cm); the polymer fibers have an orientation degree of 90% or more; the polymer fibers have fiber diameters of 0.05 μm or more and 5 μm or less; and in at least part of a repeating unit structure in the polymer material, a dipole moment is 0 D or more and 3.50 D or less, and an absolute value of a SOMO is 9 eV or more and 12 eV or less. 1. A glossy member , comprising:a polymer substrate; anda polymer fiber assembly disposed on the polymer substrate,wherein:the polymer fiber assembly has polymer fibers oriented in a given direction;{'sup': 3', '1/2, 'an absolute value of a difference between an average solubility parameter of a constituent material for the polymer substrate and an average solubility parameter of a polymer material of the polymer fibers is less than 5 (J/cm);'}the polymer fibers have an orientation degree of 90% or more;the polymer fibers have fiber diameters of 0.05 μm or more and 5 μm or less; andin at least part of a repeating unit structure in the polymer material, a dipole moment is 0 D or more and 3.50 D or less, and an absolute value of a SOMO is 9 eV or more and 12 eV or less.2. The glossy member according to claim 1 , wherein the orientation degree of the polymer fibers is 95% or more.3. The glossy member according to claim 1 , wherein the fiber diameters of the polymer fibers are 0.05 μm or more and 1 μm or less.4. The glossy member according to claim 1 , wherein the constituent material for the polymer substrate and at least part of the polymer material comprise the same material.5. The glossy member according to ...

AN ELECTROSPINNING DEVICE AND CONFIGURATION METHOD

An electrospinning device is for manufacturing material that includes aligned nano-fibers. The device includes a rotor and more than one electrically conducting protrusions disposed on the surface of the rotor and spaced apart from one another. The protrusions are configured such that an electrostatic field created when a potential difference is applied between the rotor and a target is concentrated at the tips of the protrusions and decreases between neighboring protrusions. 1. An electrospinning device for manufacturing material comprising aligned nano-fibers , the electrospinning device comprising:a rotor; anda plurality of electrically conducting protrusions disposed on the surface of the rotor and spaced apart from one another, wherein the protrusions are configured such that an electrostatic field created when a potential difference is applied between the rotor and a target is concentrated at the tips of the protrusions and decreases between neighboring ones of the protrusions.2. The electrospinning device of claim 1 , wherein the protrusions are spaced apart such that any two neighboring protrusions are spaced apart by a distance equal to at least twice the height of either one of said two neighboring protrusions.3. The electrospinning device of claim 1 , wherein the protrusions each have an aspect ratio of at least 1:10.4. The electrospinning device of claim 1 , further comprising a brush member claim 1 , extending the full width of the rotor claim 1 , arranged to contact the protrusions when the rotor is rotated.5. The electrospinning device according to claim 1 , further comprising at least one field modifier electrically connected to the rotor for controlling the strength of the electrostatic field across the length of the rotor.6. The electrospinning device according to claim 5 , wherein a field modifier is arranged at each end of the rotor.7. The electrospinning device according to claim 6 , wherein the field modifiers are arranged co-axially with the ...

Electrospun Fiber Mats from Polymers Having a Low Tm, Tg, or Molecular Weight

Methods and apparatus for forming non-woven fiber mats from polymers and monomers that are traditionally difficult to use for fiber formation are shown and described. Applicable techniques include electrospinning and other traditional fiber formation methods. Suitable polymers and monomers include those having low molecular weight, a low melting point, and/or a low glass transition temperature. 1. A method for forming non-woven fiber mats comprising:mixing a low molecular weight polymer or monomer precursor with a cross-linking agent to form a solution;forming a fiber from the solution by directing the solution through an electric field towards a target; anddirecting a photon source at the fibers as they are formed and at the target so as to crosslink the solution in situ.2. The method of wherein the low molecular weight polymer or monomer precursor has a low T.3. The method of wherein the low molecular weight polymer or monomer precursor has a low T.4. The method of wherein the low molecular weight polymer or monomer precursor has a molecular weight below 10 claim 1 ,000.5. The method of wherein the low molecular weight polymer or monomer precursor has a molecular weight below 6 claim 1 ,000.6. The method of wherein the low molecular weight polymer or monomer precursor is unmodified.7. The method of wherein the low molecular weight polymer precursor is selected from the group consisting of: Poly (propylene-fumarate)-co-(propylene maleate); (PPFcPM); Poly (Butylene-fumarate) (PBF); Poly (Butylene-fumarate)-co(butylene maleate) (PBFcBM); and Poly (propylene-fumerate) (PPF) or a combination of the above polymers.8. The method of wherein the low molecular weight polymer precursor is PPF or PPFcM claim 7 , and the method further comprises synthesizing the PPF or PPFcM via step growth polycondensation reactions.9. The method of wherein the low molecular weight polymer precursor is selected from the group consisting of: Poly (propylene-fumarate)-co-(propylene maleate); ( ...

COAXIAL SEMICONDUCTIVE ORGANIC NANOFIBERS AND ELECTROSPINNING FABRICATION THEREOF

A coaxial nanocomposite including a core, which includes fibers of a first organic polymer, and a shell, which includes fibers of a second organic polymer, the first polymer and the second polymer forming a heterojunction. 2. The coaxial nanocomposite of claim 1 , wherein the coaxial nanocomposite is a fiber or a disk.3. The coaxial nanocomposite of claim 1 , wherein the heterojunction is a p-n junction.4. The coaxial nanocomposite of claim 1 , wherein the fibers of the first polymer comprise more than one distinct organic polymer.5. The coaxial nanocomposite of claim 1 , wherein the fibers of the first polymer comprise a blend of more than one organic polymer.6. The coaxial nanocomposite of claim 1 , wherein the fibers of the first polymer comprise a blend of p-type regioregular poly(3-hexylthiophene-2 claim 1 ,5-diyl) (P3HT) and polystyrene (PS).7. The coaxial nanocomposite of claim 6 , wherein the PS is present in an amount of about 6 wt % to about 8 wt % of the total weight of P3HT and PS.8. The coaxial nanocomposite of claim 1 , wherein the fibers of the second polymer comprise n-type poly(benzimidazobenzophenanthroline) (BBL).9. The coaxial nanocomposite of claim 1 , wherein the coaxial nanocomposite has a diameter between about 200 nm and about 3000 nm.10. The coaxial nanocomposite of claim 1 , wherein the core has a diameter of about 150 nm to about 250 nm and the shell has a diameter of about 25 nm to about 75 nm.11. A method of forming the coaxial nanocomposite of claim 1 , the method comprising:dissolving the first organic polymer in a first solvent to form a first mixture;dissolving the second organic polymer in a second solvent to form a second mixture; andelectrospinning the first mixture and the second mixture.12. The method of claim 11 , wherein the first organic polymer is a blend of P3HT and about 5 wt % to about 10 wt % PS and the first solvent is chloroform (CHCl).13. The method of claim 12 , wherein the first mixture comprises greater than or ...

METHOD AND MACHINERY FOR MAKING NANOFIBRES

Electrospinning from a melt or solution by means of an electric field between a fibre source such as a spinneret or a bubble surface and a moving collector comprising a wire card of which the wires are electrically connected. The spinneret or melt or solution may be held at high potential and the wires earthed. The method produces an aligned nanofibre web that can be made into strands, yarns, cable or rope or non-woven fabrics such as stitch bonded and stitch knitted fabric. 1. A method for making nanofibres comprising electrospinning from a melt or solution by means of an electric field between a fibre source and a moving collector comprising a wire card of which the wires are electrically connected.2. A method according to claim 1 , in which the fibre source comprises a spinneret or multiple spinnerets.3. A method according to claim 1 , in which the fibre source comprises a bubble surface.4. A method according to claim 1 , in which the fibre source is held at a high electric potential and the card wires are earthed.5. A method according to claim 1 , in which the card is in the form of a drum claim 1 , such as a woollen or worsted card drum.6. A method according to claim 1 , in which the card is in the form of a belt.7. A method according to claim 1 , in which a flat card is used.8. A method according to claim 1 , in which the card surface is placed at a distance from the spinneret and has a surface speed such that nanofibres are collected on the wires of the card and oriented in a parallel arrangement on the card surface along the direction in which it travels.9. A method according to claim 8 , in which the rate is such that the fibres have time fully to dry on the card surface before they are collected.10. A method according to claim 5 , in which at least some of the usual stripper and worker rollers are dispensed with.11. A method according to claim 5 , in which collection is effected using essentially a Swift roller with a fly comb.12. A method according to ...

METHOD AND APPARATUS FOR ALIGNING NANOWIRES DEPOSITED BY AN ELECTROSPINNING PROCESS

Embodiments of the invention generally include apparatus and methods for depositing nanowires in a predetermined pattern during an electrospinning process. An apparatus includes a nozzle for containing and ejecting a deposition material, and a voltage source coupled to the nozzle to eject the deposition material. One or more electric field shaping devices are positioned to shape the electric field adjacent to a substrate to control the trajectory of the ejected deposition material. The electric field shaping device converges an electric field at a point near the surface of the substrate to accurately deposit the deposition material on the substrate in a predetermined pattern. The methods include applying a voltage to a nozzle to eject an electrically-charged deposition material towards a substrate, and shaping one or more electric fields to control the trajectory of the electrically-charged deposition material. The deposition material is then deposited on the substrate in a predetermined pattern. 1. An apparatus for electrospinning a material on a substrate , comprising:a reservoir for containing a deposition material;a nozzle in fluid communication with the reservoir, the nozzle adapted to deliver the deposition material to a surface of a substrate;a substrate support movable relative the nozzle, the substrate support adapted to support the substrate adjacent to the nozzle;a voltage source coupled to the nozzle to apply an electric potential to the nozzle to eject the deposition material from the nozzle; andone or more coils positioned around a process region located between the nozzle and the substrate support, the one or more coils adapted to influence the trajectory of the deposition material ejected from the nozzle.2. The apparatus of claim 1 , further comprising a counter electrode positioned adjacent to the substrate on a side opposite of the nozzle claim 1 , wherein the counter electrode is coupled to the voltage source and is adapted to influence the ...

System for nano-coating a substrate

The system for nano-coating a substrate (10) includes a housing (12) having an upper, dispensing chamber (18) in which electrospraying or electrospinning can occur, a lower storage chamber, and a wall (16) that separates the dispensing chamber (18) from the storage chamber. The dispensing chamber (18) includes first and second panels (24a), (24b) and a moveable collector (20) between the first and second panels (24a), (24b). Solution dispensing nozzles (26) are disposed in apertures (45) in the panels (24a), (24b), and extend from a front surface of each panel (24a), (24b). A plurality of solution supply tubes (54) extend from a rear surface of each panel (24a), (24b) to a pump (34) in the lower housing. Inner panel channels (52) are defined within each panel (24a), (24b) between the tubes (54) and the nozzles (26).

Ultrafine Fiber Printing System

An ultrafine fiber printing system contains a moving deck having a nozzle seat that disposed on the moving deck. A pipe is installed in the nozzle seat and a nozzle is disposed at the bottom end of the pipe. The upper portion and the lower portion of the pipe are combined with a heat dissipating unit and heater respectively. The top end of the pipe is connected to a feed tube having an outer end being connected with a thread squeezer. A printing platform is disposed around the moving deck. The nozzle is connected to a static electricity supply and the fiber carrier is grounded. An electric field is formed between the nozzle and the fiber carrier. The droplets exported from the nozzle are stretched into ultrafine fibers to form a patterned fabric or product.

NOZZLE HEAD MODULE AND ELECTROSPINNING APPARATUS

According to one embodiment, a nozzle head module includes a nozzle head having a hole electing a source material liquid, the nozzle head being configured to have a first voltage and an electrode provided to be relatively movable with respect to the nozzle head, the electrode being configured to have a second voltage. The second voltage is of the same polarity as the first voltage.

FIBER SHEET AND METHOD FOR MANUFACTURING SAME

According to one embodiment, a fiber sheet includes a plurality of fibers. The plurality of fibers are in a closely-adhered state.

Methods for electrospin coating and laminating of endoluminal prostheses

Endoluminal and other as implantable prostheses are fabricated in electrospinning apparatus including a target and an applicator. A solution comprising a polymer and a solvent is directed to the target with a first electrical potential between the target and the applicator to produce a first set of fibers. The same or another solution is continued to be delivered through the applicator onto the target while applying a second electrical potential to produce a second set of fibers having a second solvent fraction, and the same or different solution may be delivered while applying a third potential difference to produce a laminated structure having at least three layers. By properly controlling the electrical potentials and solvent fractions, an adhesive layer can be formed to serve a glue or adhesive between the inner and outer layers, and a stent or other scaffold may be positioned between the inner and outer layers to form a covered stent or graft.

STRONG AND TOUGH CONTINUOUS NANOFIBERS

A method of fabricating a continuous nanofiber is described. The method includes preparing a solution of one or more polymers and one or more solvents and electrospinning the solution by discharging the solution through one or more liquid jets into an electric field to yield one or more continuous nanofibers. The electrospinning process (i) highly orients one or more polymer chains in the one or more continuous nanofibers along a fiber axis of the one or more continuous nanofibers, and (ii) suppresses polymer crystallization in the one or more continuous nanofibers. The one or more continuous nanofibers can have diameters below about 250 nanometers and exhibit an increase in fiber strength and modulus while maintaining strain at failure, resulting in an increase in fiber toughness. 113.-. (canceled)14. A continuous nanofiber for use in composites , the continuous nanofiber prepared by a process comprising the steps of:electrospinning a polymeric solution, the electrospinning comprising discharging, through one or more jets, the polymeric solution through an electric field to yield one or more fibers, and suppressing, during the electrospinning, crystal formation to obtain one or more continuous nanofibers having a diameter of below about 250 nanometers, the one or more continuous nanofibers exhibiting a toughness of about 500 MPa to about 600 MPa and a true strength of about 1500 MPa to about 1700 MPa.15. The continuous nanofiber of claim 14 , further comprising highly orienting one or more polymer chains by decreasing a diameter of one or more of the continuous nanofibers by introducing claim 14 , during the electrospinning process claim 14 , one or more jet instabilities using mechanical or electromagnetic perturbations.16. The continuous nanofiber of claim 14 , further comprising highly orienting one or more polymer chains to decrease a diameter of one or more of the continuous nanofibers by stretching one or more of the continuous nanofibers during or after ...

High melting point resin fibers and nonwoven fabric

Provided are: a high-melting-point resin fiber having heat resistance and solvent resistance, offering excellent workability/formability, and having a diameter of 4 μm or less; and a nonwoven fabric including the high-melting-point resin fiber. Also provided is a method for efficiently producing a high-melting-point resin fiber having a diameter of 4 μm or less, via laser melt electrospinning. The high-melting-point resin fiber according to the present invention includes a resin having a melting point of 250° C. or higher and has a diameter of 4 μm or less. In the high-melting-point resin fiber, the resin having a melting point of 250° C. or higher is preferably a PEEK. The fiber preferably has a degree of crystallinity of 30% or less.

METHOD FOR PRODUCTION OF POLYMERIC NANOFIBERS BY SPINNING OF SOLUTION OR MELT OF POLYMER IN ELECTRIC FIELD, AND A LINEAR FORMATION FROM POLYMERIC NANOFIBERS PREPARED BY THIS METHOD

The invention relates to a method for production of polymeric nanofibers, in which polymeric nanofibers are created due to the action of force of an electric field on solution or melt of a polymer, which is located on the surface of a spinning electrode, whereby the electric field for electrostatic spinning is created alternately between the spinning electrode (), to which is supplied alternating voltage, and ions () of air and/or gas generated and/or supplied to proximity of the spinning electrode (), whereby according to the phase of the alternating voltage on the spinning electrode () polymeric nanofibers with an electric charge of opposite polarity and/or with segments with an electric charge of opposite polarity are created, which after their creation cluster together under the influence of the electrostatic forces into linear formation in the form of a tow or a band, which moves freely in space in direction of gradient of the electric fields away from the spinning electrode (). The invention further relates to a linear formation from polymeric nanofibers fabricated by this method. 1. A method for production of polymeric nanofibers , in which polymeric nanofibers are created due to the action of force of an electric field on a solution or melt of a polymer , which is located on the surface of a spinning electrode , wherein the electric field for electrostatic spinning is created alternately between the spinning electrode , onto which is supplied alternating voltage , and ions of air and/or gas generated and/or supplied to the proximity of the spinning electrode , whereby according to the phase of the alternating voltage on the spinning electrode polymeric nanofibers with an electric charge of opposite polarity and/or with segments with an electric charge of opposite polarity are created , which after their creation cluster together under the influence of the electrostatic forces into a linear formation in the form of a tow or a band , which moves freely in ...

METHOD OF MANUFACTURING TRANSPARENT ELECTRODE USING ELECTROSPINNING METHOD, AND TRANSPARENT ELECTRODE FORMED USING SAME

The present invention provides a method of manufacturing a transparent electrode using an electrospinning method. The method of manufacturing a transparent electrode according to an embodiment of the present invention includes: spinning a nanomaterial and a polymer material together on a first substrate to form a coaxial double-layered fiber including the nanomaterial and the polymer material; and removing the polymer material from the coaxial double-layered fiber to form a transparent electrode including the nanomaterial. 1. A method of manufacturing a transparent electrode , the method comprising:spinning a nanomaterial and a polymer material together on a first substrate to form a coaxial double-layered fiber including the nanomaterial and the polymer material; andremoving the polymer material from the coaxial double-layered fiber to form a transparent electrode including the nanomaterial.2. The method of claim 1 , wherein the forming of the coaxial double-layered fiber comprises spinning the nanomaterial and the polymer material together using an electrospinning method.3. The method of claim 1 , wherein the forming of the coaxial double-layered fiber comprises implementing the coaxial double-layered fiber having a shape of a coaxial cylinder in which a nanomaterial layer formed from the nanomaterial is disposed inside the coaxial double-layered fiber and a polymer material layer formed from the polymer material is surrounded by the nanomaterial layer and disposed outside the nanomaterial layer.4. The method of claim 1 , wherein the coaxial double-layered fiber is implemented as a coaxial double-layered fiber having a shape of a coaxial cylinder in which a polymer material layer formed from the polymer material is disposed inside the coaxial double-layered fiber and a nanomaterial layer formed from the nanomaterial is surrounded by the polymer material layer and disposed outside the polymer material layer.5. The method of claim 1 , wherein the forming of the ...

ELECTRO-SPINNING TYPE PATTERN FORMING APPARATUS

Provided is an electro-spinning type pattern forming apparatus. The electro-spinning type pattern forming apparatus includes a nozzle, a stage, and a fiber guide part. The nozzle has a first voltage applied thereto and spins a spinning solution. The stage is disposed below the nozzle to support a substrate on which a pattern is to be formed and has a second voltage applied thereto. The fiber guide part is disposed between the nozzle and the stage, and transforms the electric field formed between the nozzle and the stage to apply a force, acting in a direction parallel to the stage, to nano-fibers spun from the nozzle. The electro-spinning type pattern forming apparatus can form a nano-fiber pattern arranged in one direction. 1. An electro-spinning type pattern forming apparatus comprising:a nozzle having a first voltage applied thereto and spinning a spinning solution;a stage disposed under the nozzle to support a substrate on which a pattern is to be formed and having a second voltage applied thereto; anda fiber guide part disposed between the nozzle and the stage and transforming an electric field formed between the nozzle and the stage to apply a force, acting in a direction parallel to the stage, to a nano-fiber spun from the nozzle,wherein the fiber guide part comprises first and second guide parts which are symmetrically disposed based on a virtual extension line extending in a vertical direction from an end portion of the nozzle to the stage and extend in a direction perpendicular to the extension line, andthe first and second guide parts are formed of a material having a relative dielectric permittivity of 50 or less.2. The electro-spinning type pattern forming apparatus of claim 1 , wherein the first and second guide parts are formed of one or more selected from a group consisting of polystyrene (e.g. claim 1 , Styrofoam) claim 1 , polytetrafluoroethylene (e.g. claim 1 , Teflon) claim 1 , wood claim 1 , plastics claim 1 , glass claim 1 , quartz claim 1 , ...

Biomedical patches with aligned fibers

A structure of aligned (e.g., radially and/or polygonally aligned) fibers, and systems and methods for producing and using the same. One or more structures provided may be created using an apparatus that includes one or more first electrodes that define an area and/or partially circumscribe an area. For example, a single first electrode may enclose the area, or a plurality of first electrode(s) may be positioned on at least a portion of the perimeter of the area. A second electrode is positioned within the area. Electrodes with rounded (e.g., convex) surfaces may be arranged in an array, and a fibrous structure created using such electrodes may include an array of wells at positions corresponding to the positions of the electrodes.

MAGNETOSPINNING APPARATUS AND METHODS OF USE

Embodiments of the present disclosure provide magneto-spinning apparatus, methods of use, magnetospun material (e.g., a fiber such as a magnetic fiber), and the like. 1. A magneto-spinning apparatus , comprisinga device that delivers a fiber precursor material, anda magnet positioned a distance from the device, wherein the fiber precursor material is drawn to the magnet to form a fiber.2. The magneto-spinning apparatus of claim 1 , further comprising one or more posts claim 1 , wherein the magnet and the one or more posts are positioned a distance from one another so that the fiber extends the distance between the magnet and the post upon movement of the magnet and/or the post.3. The magneto-spinning apparatus of claim 1 , wherein the magnet and the post are positioned on a structure.4. The magneto-spinning apparatus of claim 3 , wherein the magnet and a post are positioned a distance from one another on the structure so that as the structure moves claim 3 , the fiber spans the distance between the magnet and the post.5. The magneto-spinning apparatus of claim 4 , wherein the magnet and a post are positioned on opposite sides of the structure.6. The magneto-spinning apparatus of claim 1 , wherein the device includes a syringe.7. The magneto-spinning apparatus of claim 1 , wherein the fiber precursor material is a magnetic fiber precursor material.8. The magneto-spinning apparatus of claim 1 , wherein the fiber is a magnetic fiber.9. A method of forming a fiber claim 1 , comprising:drawing a fiber precursor material from an aperture of a device towards a magnet positioned a distance from the aperture to form a fiber; andmoving the magnet to extend the length of the fiber.10. The method of claim 9 , further comprising:moving the magnet so that the fiber wraps around a portion of a post positioned a distance from the magnet.11. The method of claim 10 , further comprising: moving the magnet claim 10 , post claim 10 , or both so that the fiber extends from the magnet to ...

MAGNETOSPINNING APPARATUS FOR LOW-MAGNETIC MATERIALS AND METHODS OF USE

Embodiments of the present disclosure provide magneto-spinning apparatus, methods of use, magnetospun material (e.g., a fiber such as a low- or non-magnetic fiber), and the like. 1. A magneto-spinning apparatus , comprisinga device that delivers a fiber precursor material, anda magnet positioned a distance from the device, wherein the fiber precursor material is drawn to the magnet to form a fiber.wherein the device is configured to deliver the fiber precursor material and a secondary material, wherein the device is configured so that the fiber precursor material and the secondary material are adjacent one another at a tip of the device.2. A method of forming a fiber , comprising:drawing a fiber precursor material from an aperture of a device towards a magnet positioned a distance from the aperture to form a fiber;dispensing a secondary material from a second aperture of the device so that the fiber precursor material is adjacent the secondary material;moving the magnet to extend the length of the fiber;moving the magnet so that the fiber wraps around a portion of a post positioned a distance from the magnet; andmoving the magnet, post, or both so that the fiber extends from the magnet to the post, is wrapped around a portion of the post, and extends back toward the magnet.3. The method of claim 2 , wherein the secondary material is a cross-linking agent.4. The method of claim 3 , further comprising:drawing the fiber precursor material through the cross-linking material towards a magnet positioned a distance from the aperture to form the fiber, wherein the cross-linking material cross-links the fiber precursor material.5. The method of claim 4 , wherein the fiber is a non-magnetic or low-magnetic fiber.6. The method of claim 3 , wherein the cross-linking material is selected from the group consisting of: a CaCl-water solution claim 3 , hexamethylene diamine claim 3 , and a combination thereof.7. The method of claim 2 , wherein the fiber precursor material includes a ...

Electrospinning head and electrospinning apparatus

In one embodiment, an electrospinning head has a nozzle unit and a control body. The nozzle unit is arranged opposite to a base material, is applied with a voltage, and thereby is capable of discharging a raw material liquid of fiber. The control body is arranged in the vicinity of the nozzle unit so as to extend to an outside of a spinning space between the base material and the nozzle unit. Further, the control body is applied with a voltage of the same polarity as the voltage to be applied to the nozzle unit, and thereby is capable of making an electric field to be generated at the periphery of the nozzle unit.

UNIFORM, HIGH BASIS WEIGHT NANOFIBER FABRICS FOR MEDICAL APPLICATIONS

Described herein are devices, compositions and methods relating to the production of high basis weight, non-woven nanofiber polymer fabrics. In certain embodiments, described herein are modifications to free-surface, needle-less or nozzle-less electrospinning devices that permit the production of such high basis weight, non-woven nanofiber polymer fabrics. Also described are the fabrics themselves and the fabrics including one or more biologically active agents to be released upon contact with a biological tissue. Such fabrics can incorporate biologically active agents in various combinations that permit, for example, burst and/or sustained release kinetics of one or more, preferably two or more biologically active agents. 2. The nozzle-less electrospinning device of claim 1 , further comprising a second shield comprised of a second insulating material member claim 1 , having a dielectric constant of at least 1.2 claim 1 , situated between the substrate and the collecting electrode and extending from the second end of the collecting electrode towards the first end of the collecting electrode such that a portion of the electric field is shielded by the second insulating material member and the gap of unshielded collecting electrode extends between an end of the first insulating material member and an end of the second insulating material member claim 1 , wherein the second shield further increases the uniform area of an electrospun polymer mat deposited on the substrate relative to the uniform area of a polymer mat deposited in the absence of the second shield.3. The nozzle-less electrospinning device of claim 1 , further comprising a first collimating shield comprised of a third insulating material member claim 1 , having a dielectric constant of at least 1.2 claim 1 , the first collimating shield supported and situated adjacent to the substrate and between the substrate and the electrospinning electrode claim 1 , the first collimating shield extending substantially ...

ALIGNED FIBER AND METHOD OF USE THEREOF

A scaffold comprising an aligned fiber. Further, a scaffold comprising one or more electrospun fibers wherein a fast Fourier transform (FFT) analysis result of the fibers have adjacent major peaks with about 180° apart from each other. Also, methods for promoting differentiation of stem cells into osteoblasts, chondrocytes, ligament or tendon, the method comprising culturing the cells on the scaffold or aligned fiber in conditions suitable for the cell differentiation. 1. A scaffold comprising one or more fibers comprising collagen , wherein the fibers are anisotropic based on a fast Fourier transform (FFT) analysis , and wherein the anisotropic fibers are crosslinked and comprise type I collagen in its triple helical structure.2. The scaffold according to claim 1 , wherein the scaffold is in a form of one or more elongated sheets.3. The scaffold according to claim 1 , wherein the scaffold is in a form of one or more elongated rolls.4. The scaffold according to claim 1 , wherein the crosslinked fibers comprise a cross-linking agent claim 1 , wherein the cross-linking agent is selected from the group consisting of 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) claim 1 , EDC/hyaluronic acid claim 1 , genipin claim 1 , and glutaraldehyde.5. The scaffold according to claim 4 , wherein the cross-linking agent is genipin.6. The scaffold according to claim 1 , wherein the anisotropic fibrous scaffold is implanted in a human patient to repair a tendon claim 1 , ligament or nerve defect.7. The scaffold according to claim 1 , wherein the scaffold has an average porosity from about 60% to about 95%.8. The scaffold according to claim 1 , wherein the scaffold has an average porosity from about 70% to about 90%.9. The scaffold according to claim 1 , wherein the scaffold further comprises bone matrix claim 1 , adipose extracellular matrix claim 1 , heart basement membrane extract claim 1 , heart basement membrane extracellular matrix claim 1 , placenta basement membrane ...

BIOMEDICAL PATCHES WITH ALIGNED FIBERS

A multi-laminar electrospun nanofiber scaffold for use in repairing a defect in a tissue substrate is provided. The scaffold includes a first layer formed by a first plurality of electrospun polymeric fibers, and a second layer formed by a second plurality of electrospun polymeric fibers. The second layer is combined with the first layer. A first portion of the scaffold includes a higher density of fibers than a second portion of the scaffold, and the first portion has a higher tensile strength than the second portion. The scaffold is configured to degrade via hydrolysis after at least one of a predetermined time or an environmental condition. The scaffold is configured to be applied to the tissue substrate containing the defect, and is sufficiently flexible to facilitate application of the scaffold to uneven surfaces of the tissue substrate, and to enable movement of the scaffold by the tissue substrate. 1. A multi-laminar electrospun nanofiber scaffold for use in repairing a defect in a tissue substrate , the multi-laminar electrospun nanofiber scaffold comprising:a first layer formed by a first plurality of electrospun polymeric fibers; anda second layer formed by a second plurality of electrospun polymeric fibers, wherein the second layer is combined with the first layer,wherein at least a first portion of the multi-laminar electrospun nanofiber scaffold comprises a higher density of fibers than a second portion of the multi-laminar electrospun nanofiber scaffold, wherein the first portion comprises a higher tensile strength than the second portion,wherein the multi-laminar electrospun nanofiber scaffold is configured to degrade via hydrolysis after at least one of a predetermined time or an environmental condition,wherein the multi-laminar electrospun nanofiber scaffold is configured to be applied to the tissue substrate containing the defect,wherein the multi-laminar electrospun nanofiber scaffold is sufficiently flexible to facilitate application of the multi ...

FIBER SHEET AND METHOD FOR MANUFACTURING SAME

According to one embodiment, a fiber sheet includes a plurality of fibers. The plurality of fibers are in a closely-adhered state. 17-. (canceled)8. A fiber sheet formed of deposited fibers , comprising:fibers including a bio-affinity material and an amid group; [{'b': 1', '2, 'the orientation degree parameter is R/R;'}, {'b': '1', 'R is a first absorbance ratio in a first polarization direction;'}, {'b': '2', 'R is a second absorbance ratio when an orientation of the fiber sheet has been rotated 90°;'}, {'b': 1', '2, 'R>R; and'}, {'b': 1', '2', '1', '2, 'sup': −1', '−1, 'the absorbance ratio is T/T, wherein T is an absorption intensity for a wave number of 1640 cm, and T is an absorption intensity for a wave number of 1540 cm.'}], 'an orientation degree parameter expressed by the following formulas being 1.1 or more when a surface of the fiber sheet is analyzed using a polarized FT-IR-ATR method9. The fiber sheet according to claim 8 , wherein the fibers include not less than 10 wt % of a bio-affinity material.10. A fiber sheet formed of deposited fibers claim 8 , comprising:fibers being in a closely-adhered state by a capillary force when a volatile liquid provided among the fibers is dried;{'b': 1', '2, 'claim-text': [{'b': 2', '1, '(1) F>F;'}, {'b': '1', '(2) F is 1 MPa or more; and'}, {'b': 2', '1, '(3) F/F is 2 or more.'}], 'all of following (1) to (3) being satisfied, wherein F is a tensile strength in a first direction of the fiber sheet, and F is a tensile strength in a second direction orthogonal to the first direction11. The fiber sheet according to claim 10 , wherein a portion of the fiber sheet is in a fused state. This application is based upon and claims the benefit of priority from the Japanese Patent Application No. 2016-053090, filed on Mar. 16, 2016, and the PCT Patent Application PCT/JP2016/075496, filed on Aug. 31, 2016; the entire contents of which are incorporated herein by reference.Embodiments of the invention relate to a fiber-oriented ...

CENTRIFUGAL ELECTROSTATIC SPINNING DEVICE AND CONTROLLABLE COLLECTING APPARATUS FOR SPINNING TRACK THEREOF

A controllable collecting apparatus for a spinning track of a centrifugal electrostatic spinning device. The spinning track controllable collecting apparatus includes a base part and a controller, where a collecting side of the base part is provided with a plurality of electrodes distributed in an array mode, a plurality of control interfaces of the controller are respectively used for controlling the corresponding electrodes to be electrified when started, and the controller can control each control interface to be started according to a predetermined sequence. The arrayed electrodes are arranged on the collecting side and are controlled to be switched on or off by the controller according to the predetermined sequence so that spun filaments are attached to the spinning track controllable collecting apparatus according to a predetermined track to effectively locate a spinning attachment track. That is, better filaments can be spun to achieve a better spinning effect. 1. A controllable collecting apparatus for a spinning track of a centrifugal electrostatic spinning device , comprising a base part and a controller , wherein a collecting side of the base part is provided with a plurality of electrodes distributed in an array mode , a plurality of control interfaces of the controller are respectively used for controlling the corresponding electrodes to be electrified when started , and the controller can control each control interface to be started according to a predetermined sequence.2. The controllable collecting apparatus for a spinning track of a centrifugal electrostatic spinning device according to claim 1 , further comprising a heating plate for heating the collecting side of the base part.3. The controllable collecting apparatus for a spinning track of a centrifugal electrostatic spinning device according to claim 2 , wherein the base part is a substrate claim 2 , the electrodes are inlaid on the collecting side of the substrate claim 2 , and the heating ...

Oriented meso and nanotube fleece

The invention relates to oriented non-wovens made of mesotubes and nanotubes (hollow fibres), wherein the tubes or hollow fibres are oriented with an inner diameter of 10 nm - 50 mm preferably in a single direction. The invention also relates to a method for the production thereof. The oriented hollow fibre non-wovens can be produced by coating oriented template fibre non-wovens made of degradable materials with non-degradable materials, whereby the degradable materials can be destroyed, for example, by thermal methods. The oriented template fibre non-wovens made of degradable materials can be produced by special electrospinning techniques. The oriented hollow fibre non-wovens can, for example, be used in separation engineering, catalysis, microelectronics, medical engineering, materials engineering or in the clothing industry.

Apparatus for electro-blowing or blowing-assisted electro-spinning technology and process for post treatment of electrospun or electroblown membranes

A spinneret format, an electric-field reversal format and a process for post-treatment of membranes formed from electro-spinning or electro-blowing are provided, including a cleaning method and apparatus for electro-blowing or blowing-assisted electro-spinning technology.

Patent DE50114962D1

FIBER DEPOSIT PRODUCTION METHOD, MEMBRANE PRODUCTION METHOD, AND MEMBRANE ADHESION METHOD

A fiber collection tool for collecting a fiber spun by electrospinning is described. The fiber collection tool has a size holdable by the hand of a user, and includes, in its interior, an electroconductive section. Preferably, the fiber collection tool further includes a surface section outside the electroconductive section. In a fiber deposit production method, a user collects, with the fiber collection tool, a fiber spun by the user by performing electrospinning using an electrospinning device having a size holdable by the hand of the user, and thereby produces a film including a deposit of the fiber on a surface of the fiber collection tool. The fiber collection tool, having the deposit formed thereon, is pressed against a surface of an object, and the deposit is transferred onto the surface of the object, to form a film including the fiber deposit on the surface of the object. 115-. (canceled)16. A method for producing a fiber deposit , the method comprising:collecting a fiber with a fiber collection tool, the fiber being spun by a user by performing electrospinning using an electrospinning device; andproducing a deposit of the fiber on a surface of the fiber collection tool,wherein: 'the user holds the fiber collection tool with a hand; or', 'the fiber collection tool includes, in its interior, an electroconductive section, and the electrospinning is performed in in a state wherethe user holds an electric conductor by a hand, and the electric conductor is in contact with the fiber collection tool.17. A method for producing a fiber deposit , comprising:collecting a fiber with a fiber collection tool, the fiber being spun by a user by performing electrospinning using an electrospinning device; andproducing a deposit of the fiber on a surface of the fiber collection tool,wherein:the fiber collection tool includes, in its interior, an electroconductive section, andthe electroconductive section of the fiber collection tool is made from a material deformable by ...

Polymer fiber, production method for same, and production device

apparatus having screw collector with sawtooth to manufacture polymer composite nano fiber and method using it

The present invention relates to a method and an apparatus for producing a polymer composite nanofiber, comprising a saw-toothed screw collector. According to the present invention, the apparatus comprises: a spinning needle part (10) discharging a polymer solution; a spiral screw part (20) having a tooth in a sawtooth shape; a winding guide part (30) guiding the winding of the fiber discharged from an end portion of the spiral screw part (20); a collector part (40) having a drum (410); and a high voltage power supply part (50) applying positive electrode (+) voltage to the spinning needle part (10) and further applying negative electrode (-) voltage to the collector part (40).

一种制作微纳纤维支架的静电喷纺设备和方法

本发明公开了一种制作微纳纤维支架的静电喷纺设备和方法，其中设备包括料斗，纤维喷嘴，以及接地的纤维接收器，所述喷嘴内轴向安装有与高压直流电源相连的金属圆柱细针；该制备方法使高分子溶液在高压气体的分散和驱动下形成微纳高分子溶液流，通过高压气体形成微纳纤维；直流高压电使空气电离并吸附到微纳高分子溶液流，与接收器形成静电差而产生静电力，静电力牵拉高分子链而提高链取向和结晶，通过静电力提高纤维力学性能；本发明加工速度明显高于静电纺丝，与气喷技术相当，并且得到的纤维力学性能优于传统气喷所得的微纳纤维；与传统静电纺丝工艺和传统气喷工艺相比，本发明所得的微纳纤维束更加疏松，孔隙率更高，更有利于细胞长入。

一种气流辅助静电纺丝喷头及其使用方法

本发明属于纳米纤维制备领域，特别是指一种气流辅助静电纺丝喷头及其使用方法。包括喷头主体，喷头本主体中部设有主储液室，储液室两侧设有储气室，喷头主体上方设有上端盖、左侧设有左端盖、右侧设有右端盖。本发明的一种气流辅助静电纺丝喷头制备的纳米纤维产量显著提高，能够实现纳米纤维纱线的产业化生产。并且值得一提的是在气流力的作用下，纤维直径明显变细，因此制备的纳米纤维应用更广泛。

Quasi-aligned 1D Polymer Nanofibers Grid structure Cross-Laminated, Pore distribution and Pore size controlled 3D Polymer Nanofibers Membrane and Manufacturing Method thereof

Disclosed are a three-dimensional polymer nanofiber membrane with controlled pore distribution and a pore size by stacking one-dimensional polymer nanofibers to be orthogonal in a quasi-aligned grid shape, and a manufacturing method thereof. The three-dimensional polymer nanofiber membrane capable of controlling the pore size and the pore density by using an electric radiation pattern forming apparatus including a dual insulating block capable of quasi-aligning a nanofiber in a specific direction by modifying an electric field, and a current collector capable of rotating at 90 can be formed. In addition, the membrane can be used for an air filter, a separation film, a water processing filter, a cell culture membrane, etc. by assigning various properties through functional surface coating.

一种3d打印精度控制系统

本发明公开一种3D打印精度控制系统，包括用于盛装熔融材料并产生射流的注射泵、接收所述注射泵产生的射流的打印板、用于在所述注射泵和打印板之间形成电场的电源件，以及设置在所述打印板上、用于检测纺丝电流值的电流计，和与所述电流计信号连接、用于根据其检测值控制所述电源件输出电压的控制器。本发明所公开的3D打印精度控制系统，通过电流计实时检测静电纺丝的电流值，并将其反馈给控制器，通过控制器控制电源件的输出电压，达到调节静电纺丝电流值的目的，使得静电纺丝电流值处于预设范围内，并且整体形成闭环控制，控制精度进一步提高。相比于现有技术，本发明能够提高生物支架打印精确度。

一种含微孔隙和纳米纤维复合结构的仿生组织工程支架及其制备方法

本发明公开了一种含微孔隙和纳米纤维复合结构的仿生组织工程支架及其制备方法。所述具有微孔隙和纳米纤维网络的仿生组织工程支架包括微孔隙和纳米纤维网络结构；所述微孔隙的孔径为20～200μm；所述纳米纤维网络的直径为10～2000nm，长度为1～100μm。本发明组织工程支架充分模拟了天然细胞外基质的结构特征，微孔为细胞长入支架提供了条件，较高的孔隙率利于氧和营养物质在之间内部的渗透和扩散；纳米纤维网络仿生细胞外基质的网络结构，能够促进细胞黏附、生长、增殖、分化和迁移。本发明制备方法很好地解决了现有传统的支架制备工艺的缺点，具有成为新的组织工程支架制备技术的潜力。

Method for retrovirus removal

액체 샘플로부터 레트로바이러스를 제거하는 방법 및 높은 액체 투과도와 높은 미생물 보유성을 동시에 나타내는 액체 여과 매질을 함유하는 나노섬유가 개시되어 있다. 상기 레트로바이러스는 약 6보다 큰 레트로바이러스 LRV를 갖는 여과 매질을 함유하는 다공성 나노섬유를 통하여 액체를 통과시키는 것에 의해 액체로부터 제거되며, 상기 나노섬유(들)은 약 10 nm 내지 약 100 nm의 직경을 갖는다. 상기 여과 매질은 섬유성 전기방사 중합체성 나노섬유 액체 여과매질 매트 형태일 수 있다. Disclosed are nanofibers containing a liquid filtration medium that simultaneously exhibits both high liquid permeability and high microbial retention, as well as methods of removing retroviruses from liquid samples. Wherein the retrovirus is removed from the liquid by passing the liquid through porous nanofibers containing a filtration medium having a retroviral LRV greater than about 6, the nanofiber (s) having a diameter of about 10 nm to about 100 nm Respectively. The filtration media may be in the form of a fibrous electrospun polymeric nanofiber liquid filtration media mat.

一种复合极化纤维膜制造装置

一种复合极化纤维膜制造装置，涉及复合纤维的喷印制造装置。设有直流高压电源、空气加热系统、气罩、主高压电源、放电极、液体导管、分液装置、纺丝针头、辅助高压电源、收卷装置、机架、抽气装置、铜网、深层极化负电极基座、深层极化负电极、深层极化正电极、深层极化正电极基座、预极化负电极基座、预极化负电极、传送带、放卷装置、预极化正电极、预极化正电极基座。所制得的复合极化纤维膜是一种透气性和致密性好的立体薄膜，可在不增加空气阻力情况下显著提高空气过滤效率，促进静电纺丝技术在驻极体过滤膜生产中的应用。

一种静电纺纳米纤维发生装置

本发明公开了一种静电纺纳米纤维发生装置，包括纤维发生器、纤维收集装置和高电压发生器，纤维发生器包括纺丝腔体、喷丝线槽和储液罐，喷丝线槽中间为狭缝，该狭缝连通纺丝腔体内部，储液罐连通纺丝腔体，喷丝线槽为迂回曲折结构；纤维收集装置置于喷丝线槽的正上方位置；高电压发生器具有高压端和接地端。本发明的一种静电纺纳米纤维发生装置，是以粘性液体为原料，利用静电纺丝原理生产纳米纤维的装置；现有技术相比，本发明的其核心为具有弯曲狭缝的纤维发生器，该纤维发生器不仅与有效地抑制了溶剂挥发引起的纺丝液浓度变化，从而大大提高了纳米纤维生产的稳定性，而且提高了所生产纳米纤维薄膜的均匀性和生产效率，适于纳米纤维的连续规模化生产。

Melatonin nerve conduit composition, nerve conduit, preparation method and application thereof

本发明提供了一种褪黑素神经导管组合物、神经导管及其制备方法和应用，所述组合物由生物可降解代谢的材料、褪黑素、生物相容粘附材料组成；利用3D打印或静电纺丝生物降解的材料和褪黑素共融或有机溶剂，成型各种生物医学应用的导管，导管成型后，根据需要在内壁打印或喷涂生物粘附物质层，诱导细胞在导管分化和生长。本发明提供了一种具有生物学所需要的导管支架，具有理想的生物医学功能材料，制备简单、成本低、质量容易控制、应用广等优点。大鼠坐骨神经缺损修复实验显示，本发明的褪黑素神经导管促进神经再生，提高再生神经成熟度和发挥作用的神经纤维数，促进坐骨神经功能恢复正常，且效果优于自体神经移植修复，具有很好的应用前景。

Method and device for producing in-situ electret fiber membrane

本发明公开了一种原位驻极纤维膜的生产方法和装置，采用气动将聚丙烯熔融料从喷丝孔喷出，形成熔体细丝；所述熔体细丝先穿过高压静电场，再被收集为聚丙烯非织布纤维膜。本方法在喷丝与收集之间建立一定强度的静电场，当聚丙烯等可极化材料的熔体经过喷丝孔进入静电场被极化后，由于熔体中聚合物分子链所带电荷相同，在极化空间内运动时熔体射流会不断发生劈裂，最终到达收集时即可得到比喷丝孔直径小很多的纤维，因此不再需要孔径极小的喷丝孔；同时，在熔体喷丝过程中既已完成了极化，因此无需再进行二次极化；本发明不仅降低了对喷丝板的要求，而且由于喷丝孔的孔径增大，生产过程中的喷孔堵塞现象极大程度降低，同时简化了工艺步骤。

It is a kind of for filtering the preparation method of the three-dimensional nanofiber membrane of PM2.5

一种用于过滤PM2.5的三维纳米纤维膜的制备方法，将聚甲基丙烯酸甲酯粉末溶解于有机溶剂中形成纺丝液；将纺丝液加入到储液罐中，并在接收电极板上附上一层无纺布，并控制所述接收电极板到发射极的距离为16～18cm；在发射极上施加32‑35kv的正电压，并在接收电极板施加‑20V～‑30V的第一负电压。并控制流速为1.6～1.8ml/h，温度为35～38℃、相对湿度为25％～35％，进行静电纺丝10～15min；保持所述正电压、流速、温度及湿度不变，在接收电极板施加‑35V～‑40V的第二负电压，进行静电纺丝10～15min获得所述三维纳米纤维膜。该产品呈蓬松的立体纤维结构，有助于实现高效过滤。

Electrospinning apparatus, supporting apparatus for supporting electrospinning apparatus, well aligned nanofibers and method for preparing the same

본 발명의 한 실시예에 따른 정렬된 나노 섬유를 제조하는 전기방사 장치는 고분자 용액을 토출하는 방사 노즐, 상기 방사 노즐로부터 토출되는 고분자 용액을 수집하여 나노 섬유를 제조하는 케이지 콜렉터, 그리고 상기 방사 노즐과 상기 케이지 콜렉터 사이에 위치하여 전류 흐름을 유도하는 제3의 극(pole)을 포함한다. An electrospinning apparatus for manufacturing aligned nanofibers according to an embodiment of the present invention includes a spinning nozzle for discharging a polymer solution, a cage collector for manufacturing nanofibers by collecting a polymer solution discharged from the spinning nozzle, and the spinning nozzle And a third pole positioned between the cage collector and inducing current flow.

The preparation method of efficient low-resistance multilayered structure Electrospun nano-fibers composite membrane

本发明公开了一种高效低阻多层结构静电纺丝纳米纤维复合膜及制备方法。多层结构静电纺丝纳米纤维复合膜，由基材、纳米纤维层和保护材料复合而成，其中，纳米纤维层由三层纳米纤维构成。本发明同时公开了多层结构静电纺丝纳米纤维复合膜的制备方法，对纺丝液配方及纺丝工艺进行改进，克服现有技术及产品的不足，通过线型电极静电纺丝的方法，简单、高效制备过滤效率高、阻力压降低、机械性能良好的空气过滤产品，具有较大的应用和产业化价值。

A kind of compound polarized fibers film manufacturing device

一种复合极化纤维膜制造装置，涉及复合纤维的喷印制造装置。设有直流高压电源、空气加热系统、气罩、主高压电源、放电极、液体导管、分液装置、纺丝针头、辅助高压电源、收卷装置、机架、抽气装置、铜网、深层极化负电极基座、深层极化负电极、深层极化正电极、深层极化正电极基座、预极化负电极基座、预极化负电极、传送带、放卷装置、预极化正电极、预极化正电极基座。所制得的复合极化纤维膜是一种透气性和致密性好的立体薄膜，可在不增加空气阻力情况下显著提高空气过滤效率，促进静电纺丝技术在驻极体过滤膜生产中的应用。

A kind of electromagnetic levitation type centrifuges electrostatic spinning apparatus

本发明涉及一种磁悬浮式离心纺丝装置，属于纺丝领域。主要包括红外加热管、磁悬浮小球、收集圆筒、磁悬浮底座、圆筒电极、三角夹持装置、高速旋转圆盘、支撑架和配重小球，磁悬浮小球为中空的球体，磁悬浮小球的上面有进料孔，磁悬浮小球的腰部附近有多圈的离心纺丝小孔，磁悬浮小球的下部有配重小球，收集圆筒的底面上放置磁悬浮底座，磁悬浮小球位于磁悬浮底座的正上方，磁悬浮小球上方的支撑架上依次安装有三角夹持装置、高速旋转圆盘和红外加热管，圆筒电极位于收集圆筒内壁的中间部位。空心金属小球上布满小孔，当给磁悬浮小球较大速度V时，磁悬浮小球内的熔体从小孔内甩出，进行离心纺丝，金属磁悬浮小球旋转过程中动能损失很少。

Electro-spinning apparatus using drum collector and method of manufacturing a transparent electrode using the same

In the electrospinning apparatus according to the present invention, since the nanofibers can be aligned in a certain direction by electrospinning the nanofibers to the rotating drum collector, a transparent electrode made of directional nanofibers can be manufactured. In addition, since auxiliary electrodes are provided inside the drum collector to concentrate the jet emitted from the spinning nozzle, the degree of alignment of the nanofibers can be further improved. Further, since the transparent electrode using the nanofibers of the grid pattern can be produced, the surface roughness and density of the transparent electrode can be precisely controlled. In addition, it is possible to provide a transparent electrode having a grid pattern having flexibility and stretchability by a simple and economical process, and the flexible display device or the flexible display device can be easily realized using the transparent electrode. Further, since the co-axial double-layer fiber is formed by spinning the nanomaterial and the polymer material together, and the polymer material is removed to provide the transparent electrode, the process is very simple and economical.

Portable electrostatic spinning equipment

本发明提供一种便携式静电纺丝设备，其包括注射筒体、推杆、封堵部件和单向节流部件。其中，推杆为空心结构，推杆的第二前端密封安装有单向节流部件。当第一腔体内的纺丝液用完，向外拉动推杆以增大第一腔体容积，从推杆上取下封堵部件，经推杆第二后端开口向推杆空心腔中注入纺丝液，空心腔内介质压力增大，单向节流部件开启，纺丝液由推杆空心腔进入第一腔体，实现纺丝液的注入或更换，操作简便；此外，还方便向推杆中加入消炎药等药粉，纺丝液注入时将药粉带入第一内腔，带有药粉的纺丝沉积在伤口上利于伤口消炎愈合；静电纺丝设备体积小，方便携带；使用时，方便随着患者伤口形状移动纺丝设备，根据伤口形状纺丝，实现伤口愈合。

Lithium battery negative electrode material Co3O4Preparation method of nano-fiber

本发明公开了一种锂电池负极材料Co 3 O 4 纳米纤维的制备方法，本发明以甲氧苄氨嘧啶(C 14 H 18 N 4 O 3 )有机配体、乙酸钴·四水合物为主要原料，采用了静电纺丝和控温烧结技术制备的Co 3 O 4 纳米纤维，在四氧化三钴纳米碳纤维的表面包覆一层碳，改善了金属氧化物在Li + 脱嵌过程中体积膨胀系数大、导电性差等缺点，具有高的可逆容量；纳米纤维具有量子尺寸效应，增大了材料与电解液的接触面积，为Li + 提供了更多的活性位点，缩短了Li + 的传输路径，提高了充放电过程中Li + 脱嵌速率，结构稳定，可逆性能良好，比容量高，在整个制备过程中，操作简单，成本低廉，设备投资少，适合批量生产。

A kind of electrostatic spinning electrode and batch prepare the device of nanofiber

本发明公开了一种静电纺丝电极及批量制备纳米纤维的装置，包括呈长条状的本体，所述本体的横截面的形状由底部向顶部逐渐收窄，在所述本体的顶端具有溶液的停留面，所述停留面沿本体的长度方向延伸。本发明用于纺丝的电极由底部向顶部逐渐收窄，可以在顶部形成更高的电场强度，其纺丝临界电压更低，能耗更低，并且纺丝电极的本体顶端具有停留面，纺丝溶液经涂覆后能停留在停留面上，从而保证纺丝器件的均匀性和连续性。本发明可应用于静电纺丝。

A kind of preparation method of aramid fiber composite diaphragm for lithium battery

本发明公开了一种芳纶锂电池复合隔膜的制备方法，包括以下步骤：（1）常温下将氯化锂粉末加入到N，N‑二甲基乙酰胺里，配成N，N‑二甲基乙酰胺/氯化锂混合溶剂；（2）将干燥好的PMIA加入到N，N‑二甲基乙酰胺/氯化锂混合溶剂中，配制浓度为15‑25wt%的PMIA纺丝溶液，其中溶液中氯化锂的浓度为1‑3wt%；（3）将配制好的PMIA纺丝溶液进行静电纺丝，处理液处理过的PET无纺布基材接收；（4）将纺丝完成后得到的纤维膜浸入40℃乙醇溶液静置1‑3min，干燥，机械辊压得到PMIA/PET复合隔膜。本发明可以方便地调整电纺工艺参数，有效地改变膜的孔隙率、纤维直径、孔径、厚度等重要特性以适应应用中的实际需要，从而获得高孔隙率、高吸液量的锂离子电池隔膜。

One kind is from nanofiber twisted yarn continuous preparation device and method

本发明涉及纺织加工技术领域，旨在提供一种自加捻纳米纤维纱线连续制备装置及方法。包括：包括垂直安装的电机，其底部的转轴通过联轴器连接金属材质的喷丝器；沿喷丝器的周向均匀布置多个喷丝孔；集束系统包括漏斗状集束器、风机和至少两个风淋头；漏斗状集束器通过电缆接至静电发生器的负极；在下沉部位的中心位置设有通孔，通孔、喷丝器和电机转轴位于同一竖向轴线上；喷丝器上各喷丝孔所处的平面与漏斗状集束器的平面部分平行布置；卷绕收集系统包括导纱罗拉和卷绕罗拉，导纱罗拉位于漏斗状集束器的通孔下方。本发明中采用静电离心纺制备纳米纤维，生产效率高，原料可溶可熔；纳米纤维纱线集取向度高、连续性好、同步加捻及高效短流程为一体。

Parallel electric field induction phase separation method prepares nucleocapsid structure natural polyelectrolyte nanofiber

本发明涉及一种以平行电场诱导相分离法制备核壳结构天然聚电解质纳米纤维的方法，以天然产物透明质酸和壳寡糖为原料，通过配制二者的可溶性聚电解质混合溶液，采用高压静电纺丝技术制备核壳结构的天然聚电解质纳米纤维。本发明中通过平行电场诱导聚阳电解质与聚阴电解质发生相分离，成功制备出核壳结构的纳米纤维。本发明制备的核壳结构纳米纤维具有抗菌止血、抑制癌细胞生长及良好的保水特性，即壳层壳寡糖的抗菌止血、抑制癌细胞生长作用，核层透明质酸良好的保水作用。该纳米纤维在生物组织工程、药物或基因载体材料、生物医用材料等方面具有良好的应用前景。

Apparatus and method for fabricating nanofibers and their construction

본 발명은 폴리머 섬유를 제조하기 위한 장치 및 방법, 특히 나노섬유가 펄스화 및/또는 폭발화 초음파를 사용하는 것에 의하여 제조되는 무-노즐 전자방사 장치 및 방법에 관한 것이다.

Electrostatic spinning equipment

本申请公开了一种静电纺丝设备，包括纺丝箱，包括多个单元电极的纺丝电极，连接杆，转动驱动部件，收集电极；单元电极通过连接杆与转动驱动部件连接；纺丝箱用于盛放纺丝液；转动驱动部件用于带动单元电极转动进入纺丝箱中取纺丝液，并带动沾有纺丝液的单元电极转出纺丝箱，以使纺丝液在收集电极和单元电极之间形成纳米纤维；收集电极用于收集纳米纤维形成纳米纤维膜。本申请中单元电极通过连接杆与转动驱动部件连接，通过转动驱动部件旋转进入和转出纺丝箱，沾有纺丝液的单元电极与收集电极之间不存在其他任何部件，对纳米纤维的产生过程不会产生任何影响，纳米纤维直接沉积在收集电极处，从而使收集电极处形成的纳米纤维膜均匀性好、质量高。

A kind of conduction PAN/rGO Coaxial Nanofibers and preparation method thereof

本发明涉及一种导电PAN/rGO同轴纳米纤维及其制备方法，所述同轴纳米纤维的芯层为PAN，壳层为rGO；其中，纳米纤维中PAN和rGO的质量比例为1～3：0.002～0.02。制备方法包括：将PAN粉体溶解于溶剂中，得到芯层纺丝液；将氧化石墨烯溶解于溶剂中，得到壳层纺丝液；用注射器分别取芯层纺丝液和壳层纺丝液，连接同轴纺丝针头，置于静电纺丝装置上进行电纺，收集产物，干燥，得到PAN/GO同轴纳米纤维；利用还原剂进行还原即得。本发明制备的PAN/rGO同轴纳米纤维直径均一，导电性能良好，电阻率可达2.6Ω·m。

A kind of cross-linked polysaccharides fiber and preparation method thereof

本发明提供一种交联多糖纤维及其制备方法，属于高分子纤维领域。该方法先使用高碘酸钠氧化多糖，得到二醛多糖，然后将二醛多糖与聚氧化乙烯、表面活性剂和共溶剂共同配制混合水溶液进行静电纺丝，得到电纺纤维；再将电纺纤维置于己二酸二酰肼溶液中进行交联，得到交联多糖纤维。本制备方法适用于多种多糖，具有广泛的适用性。本发明还提供上述制备方法得到的交联多糖纤维。本发明交联多糖纤维具有良好的耐水性能，可调的力学和降解性能以及良好的生物相容性，能够满足许多生物医学应用的要求。