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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 26. Отображено 26.
23-06-2023 дата публикации

Lightweight depth video frame interpolation method based on attention mechanism

Номер: CN116320246A
Автор: LI YIGE, YANG GAOBO
Принадлежит:

The embodiment of the invention provides a lightweight depth video frame interpolation method based on an attention mechanism, and belongs to the technical field of image processing, and the method specifically comprises the steps: constructing an initial interpolation model of a lightweight video frame based on the attention mechanism; obtaining a plurality of image triples as a training set; initializing model parameters, setting the number of iterations, setting an L1 loss function and a perception loss function according to the difference between an interpolation frame synthesized by the initial model and a reference frame, performing end-to-end training on the initial model, and iteratively optimizing the parameters of the initial model to obtain a target interpolation model; and inputting to-be-processed data into the target interpolation model to obtain a synthesized intermediate frame image as an interpolation frame. Through the scheme of the invention, the feature expression related ...

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Номер записи: 1
11-07-2023 дата публикации

Space gene recognition and extraction method based on social media text data

Номер: CN116414985A
Автор: DUAN JIN, LI YIGE, GUO CHUYI
Принадлежит:

The invention discloses a social media text data-based space gene identification and extraction method, which comprises the following steps of: acquiring network text data about a city, and then preprocessing the data to obtain a data set D1; constructing a dictionary and a vector space in analysis software, introducing an LDA topic model, and performing topic classification on an obtained data set D1; synonyms are merged in all the topics, synonym replacement is carried out in the data set D1, and a data set D2 is obtained; counting the number of co-occurrence times of every two keywords in the data set D2, and constructing a co-word matrix M; and clustering semantic network analysis results by using a hierarchical clustering model to obtain a spatial combination mode, namely a spatial gene. According to the method, web text data about a certain research city is collected from a multi-source social media platform, and a practical technical means is provided for city researchers to identify ...

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Номер записи: 2
21-04-2023 дата публикации

Semi-aromatic carbon dioxide-based quadripolymer and preparation and modification method thereof

Номер: CN115991865A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE
Принадлежит:

The invention discloses a semi-aromatic carbon dioxide-based quadripolymer and a preparation and modification method thereof, and belongs to the technical field of carbon dioxide-based degradable plastics. Four temperature-resistant structural formulas are provided. The preparation method comprises the following steps: copolymerizing epoxide and phthalic anhydride in a solvent by using a catalyst I; introducing carbon dioxide until the reaction pressure is 0.13-4.0 MPa, supplementing a catalyst II, continuing copolymerization, releasing the pressure, supplementing epoxide and phthalic anhydride, supplementing a catalyst III, and carrying out copolymerization until the reaction is terminated, so as to obtain a glue solution; and washing and devolatilizing to obtain the product. The problem that existing PPCEP is poor in temperature resistance is solved. The invention further provides a cross-linking modification method, so that the temperature resistance and the dimensional stability are ...

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Номер записи: 3
14-07-2023 дата публикации

Temperature-resistant degradable foam material

Номер: CN116426100A
Автор: LI HONGGUO, FU HAI, LI YIGE, WEI HUAIJIAN
Принадлежит:

The invention discloses a temperature-resistant degradable foam material, and belongs to the technical field of foam materials. The composite material is characterized by comprising the following raw materials in parts by weight: 30-70 parts of PPCP, 35-80 parts of PBS, 0-30 parts of PCL and/or PBAT and 0-3 parts of a nucleating agent. The foaming material is a semi-aromatic carbon dioxide-based copolymer and PBS blended foaming material, PPCP is good in temperature resistance and high in water resistance and gas resistance, and the foaming material is prepared by matching PPCP with PBS according to a certain proportion. Under the synergistic cooperation of the two, the foaming material is good in air resistance and water resistance and good in water resistance, and can be used for packaging water-containing or moist goods. The foaming ratio of the foaming material can reach 40-50 times, the thermal deformation temperature reaches 80 DEG C or above, and the requirement of container marine ...

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Номер записи: 4
16-05-2023 дата публикации

Full-biodegradable plastic controlled-release fertilizer coating material and fertilizer forming process

Номер: CN116120132A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE
Принадлежит:

The invention discloses a full-biodegradable plastic controlled-release fertilizer coating material and a fertilizer forming process, and belongs to the field of agricultural fertilizers. The composition is characterized by comprising the following components in parts by weight: 5-99 parts of a semi-aromatic carbon dioxide-based copolymer and 1-40 parts of a regulator, the conditioning agent comprises PPC, PBAT, PCL, PLA and a pore-forming agent. The controlled-release fertilizer forming process comprises the following steps: dissolving the controlled-release fertilizer coating material into a solvent to prepare a coating solution; dipping or spraying the coating solution on the fertilizer, transferring the fertilizer into a vacuum fluidized bed for devolatilization, and curing the compound fertilizer coating material on the surface of the fertilizer. The controlled-release fertilizer coating material provided by the invention can be completely degraded into carbon dioxide and water through ...

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Номер записи: 5
30-06-2023 дата публикации

Method for improving barrier property of polycarbonate

Номер: CN116355194A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE, FU HAI
Принадлежит:

The invention discloses a method for improving the barrier property of polycarbonate, and belongs to the technical field of polycarbonate materials. The method is characterized in that carbon dioxide and a comonomer are copolymerized to prepare a carbon dioxide-based copolymer, and the comonomer comprises a ring-containing branching agent; the ring-containing branching agent is one or more of pyromellitic dianhydride, 1, 4, 5, 8-naphthalene tetracarboxylic anhydride, 3, 4, 9, 10-perylenetetracarboxylic dianhydride, TDI (toluene diisocynate) and MDI (diphenylmethane diisocyanate). Aiming at the problem that the barrier property of the carbon dioxide-based copolymer is improved, an applicable ring-containing branching agent is introduced, the ring-containing branching agent has good compatibility with the carbon dioxide-based copolymer and can be uniformly distributed in the copolymer, after a PPC chain segment is copolymerized with the ring-containing branching agent, a two-dimensional net ...

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Номер записи: 6
19-03-2008 дата публикации

Method for processing sulfur-containing waste lye

Номер: CN0101143746A
Автор: NING YANCHUN, PU WENJING, ZHANG CHUN, LI YIGE, LU LIMIN, YANCHUN NING, WENJING PU, CHUN ZHANG, YIGE LI, LIMIN LU
Принадлежит:

The invention relates to a processing method of sulfur containing waste alkali solution, which is in particular to a catalytic oxidation desulfurization method of the supported phthalocyanine cobalt. The sulfur containing waste alkali solution is processed by the method of the invention, which both avoids a second pollution caused by the direct discharging of the phthalocyanine cobalt into the water body, and improves the desulfurization effect of during the process of the sulfur containing waste alkali solution. The active carbon supported phthalocyanine cobalt has a higher catalytic oxidation activity, a simple process and a higher safety.

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Номер записи: 7
29-08-2023 дата публикации

Barrier composite film and application thereof

Номер: CN116653398A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE, WANG BO
Принадлежит:

The invention discloses a barrier composite film and application thereof and belongs to the technical field of packaging materials. Which comprises support layers and a barrier layer which are sequentially stacked, and is characterized in that the outermost two layers of the barrier composite film are the support layers, and bonding layers are compounded between the support layers and the barrier layer; the supporting layer is a polyethylene film, a polypropylene film or an ethylene-vinyl acetate copolymer film; the components of the barrier layer comprise semi-aromatic polycarbonate and an auxiliary agent; the semi-aromatic polycarbonate is one or more of PPCP (Polypropylene), PPCEP (Polypropylene Copolymer Epoxy Polypropylene) and PPCCP (Polypropylene Copolymer Polypropylene). Semi-aromatic polycarbonate with excellent oxygen resistance, water resistance and biodegradability is introduced as the barrier layer of the barrier composite film, so that the barrier composite film has excellent ...

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Номер записи: 8
02-05-2023 дата публикации

Polycarbonate biodegradable elastomer and preparation method thereof

Номер: CN116041679A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE
Принадлежит:

The invention discloses a polycarbonate biodegradable elastomer and a preparation method thereof, and belongs to the technical field of carbon dioxide-based copolymers. The polymer is characterized in that the polymer is a copolymer with a ternary block structure of phthalic anhydride, epoxyalkane and carbon dioxide, wherein the phthalic anhydride and the epoxyalkane are polymerized to form a polyphthalate molecular chain segment; a polycarbonate molecular chain segment obtained by polymerizing alkylene oxide and carbon dioxide is copolymerized between the polyphthalate molecular chain segments at the two ends in a block manner. The preparation method comprises the following steps: preheating a mixed solution of epoxyalkane and phthalic anhydride, and adding the preheated mixed solution into a reaction kettle; pressurizing and filling carbon dioxide to perform ring-opening copolymerization reaction; and adding a mixed solution of alkylene oxide and phthalic anhydride under pressure to continue ...

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Номер записи: 9
18-07-2023 дата публикации

High-temperature-resistant carbon dioxide-based alloy as well as foaming material and preparation method thereof

Номер: CN116444974A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE, WANG BO
Принадлежит:

The invention discloses a high-temperature-resistant carbon dioxide-based alloy and a foaming material and a preparation method thereof, and belongs to the technical field of polymer foaming materials. The alloy is characterized by being prepared by blending a carbon dioxide-based copolymer and PBS (Phosphate Buffer Solution) according to a mass ratio of (10-90): (5-80), and the carbon dioxide based copolymer is PPCCP, PPCHC and/or PCHC. The foaming material is prepared from the following raw materials in parts by weight: 70 to 100 parts of alloy, 0.5 to 5 parts of compatibilizer, 0.1 to 5 parts of chain extender, 0.1 to 8 parts of cross-linking agent, 0.5 to 5 parts of nucleating agent, 0.05 to 0.5 part of foaming agent and 0.1 to 40 parts of filler. The CHO-containing semi-aromatic polycarbonate is adopted as a foaming main body material, and after PBS is utilized for modification, the foaming ratio is large, and the softening point, the barrier property and the tensile strength of the ...

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Номер записи: 10
28-04-2023 дата публикации

Robot rotor aerodynamic characteristic simulation method based on CFD

Номер: CN116029228A
Автор: GAO XUESHAN, WEI YI, ZHAO PENG, LI YIGE, LI MINGKANG, ZHANG QINGFANG
Принадлежит:

The invention discloses a robot rotor aerodynamic characteristic simulation method based on CFD (computational fluid dynamics), which can be used for researching aerodynamic characteristics of rotors and providing reference for optimization of rotor structures. The lift force can be directly obtained, complex mathematical equations and formulas are not needed, the method is visual, simple and convenient, and meanwhile the obtained result is basically consistent with the actual situation. Compared with the prior art, the method has the advantages of comparing the forces of the rotors with different sizes, is simple and convenient, can realize the lift forces of the rotors with different sizes only by repeating the simulation method, and can intuitively optimize the structures of the rotors and the mounting disc. According to the method, a speed cloud picture, a pressure cloud picture, a trace picture and the like can be drawn through post-processing, the airflow condition is visually analyzed ...

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Номер записи: 11
28-04-2023 дата публикации

Carbon dioxide-based quaternary block copolymer and preparation method thereof

Номер: CN116023644A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE
Принадлежит:

The invention discloses a carbon dioxide-based quaternary block copolymer and a preparation method thereof, and belongs to the technical field of multipolymer. The high-temperature-resistant carbon dioxide-based quaternary block copolymer is characterized by having three high-temperature-resistant carbon dioxide-based quaternary block copolymer structural formulas, and the preparation method comprises the following steps: under anhydrous and anaerobic conditions, adding epoxypropane, phthalic anhydride, a catalyst and a solvent into a high-pressure reaction kettle, reacting at a certain reaction temperature, after the phthalic anhydride is completely reacted, replenishing the catalyst, and carrying out a reaction at a certain temperature to obtain the high-temperature-resistant carbon dioxide-based quaternary block copolymer. Introducing carbon dioxide to a certain pressure, continuing the reaction until the epoxypropane is completely reacted, adding cyclohexene oxide, phthalic anhydride ...

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Номер записи: 12
07-04-2023 дата публикации

Continuous production process of carbon dioxide-based biodegradable polymer

Номер: CN115926136A
Автор: LI HONGGUO, YAN YI, WANG BO, LI YIGE
Принадлежит:

The invention discloses a continuous production process of a carbon dioxide-based biodegradable polymer, and belongs to the technical field of degradable plastics. The method is characterized by comprising the following steps: completing carbon dioxide-based multi-component copolymerization in a reaction kettle (1); after the polymer glue solution and the glue solution dissolving agent are continuously mixed in the dissolver (3), a mixed solution is extracted; mixing the mixed solution and a polymer precipitation agent in a precipitation device (4) to obtain a to-be-settled solution; to-be-settled liquid enters the layering device (5) for layering, supernatant liquid continuously overflows from the upper part of the layering device (5), and materials at the bottom are continuously discharged from the bottom of the layering device (5) and then enter the devolatilization machine (6) to remove volatile components. The continuous production process of the carbon dioxide-based biodegradable ...

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Номер записи: 13
30-06-2023 дата публикации

Naphthalene anhydride modified carbon dioxide-based multipolymer and preparation method thereof

Номер: CN116355189A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE
Принадлежит:

The invention discloses a anhydride naphthalene modified carbon dioxide-based multipolymer and a preparation method thereof, and belongs to the technical field of degradable plastics. The method is characterized by being a random or block quadripolymer of epoxypropane, phthalic anhydride, anhydride naphthalene and carbon dioxide, and comprises the following steps: mixing the materials, adding the mixture into a reaction kettle, and adding a catalyst; filling carbon dioxide to carry out quaternary ring-opening copolymerization reaction; and after the reaction is finished, washing, devolatilizing, granulating and drying to obtain the purified quadripolymer. A naphthalene ring structure is introduced into the carbon dioxide-based multipolymer, the barrier property of the polymer is further improved by a proper amount of the naphthalene ring structure, and meanwhile, the temperature resistance of the carbon dioxide-based multipolymer is also improved by introduction of the naphthalene ring ...

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Номер записи: 14
27-06-2023 дата публикации

Polycarbonate toughened resin

Номер: CN116333279A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE, WANG BO, FU HAI
Принадлежит:

The invention discloses polycarbonate toughened resin, and belongs to the technical field of toughened resin. The invention is characterized in that the composition is a terpolymer of ethylene oxide, phthalic anhydride and carbon dioxide. The ethylene oxide-phthalic anhydride-carbon dioxide terpolymer is named as a glycol phthalate-ethylene carbonate copolymer, which is called PECP for short. After the phthalic anhydride is introduced into the copolymer, the molecular structure of the copolymer presents a tiling effect, and molecules easily form a layered structure due to the tiling effect, so that the barrier property of the copolymer is greatly improved. The introduced ethylene oxide is a flexible monomer, so that the toughness of the copolymer can be improved. The method has no influence of other monomers, and the synthesized PECP is a barrier material with high toughness and can be used as a toughening agent of PPCP.

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Номер записи: 15
30-03-2018 дата публикации

Multifunctional machinery wrench

Номер: CN0207155714U
Автор: LIU ZHONG, WANG YUTING, LI YIGE, ZHENG CONGMIN, WANG XU
Принадлежит: LIU ZHONG

The utility model discloses a multifunctional machinery wrench, including last pincers, lower pincers and ratchet cover, it all opens flutedly to go up pincers and lower binding clip portion, it connects the chamber to be equipped with in the ratchet cover, be equipped with the lug on the lateral wall of connection chamber, recess and lug sliding connection, under clamp the afterbody and open andto have the square groove, on clamp the afterbody and open and to have the spout, the inside swing joint of spout has the screwdriver, be equipped with the ratchet chamber in the ratchet cover, the ratchet intracavity is equipped with ratchet, clockwise card, anticlockwise card, jump ring, fixture block, the ratchet rotates to connect through the ratchet shaft is having the ratchet intracavity, the ratchet shaft both ends are run through and are extended outside the ratchet cover, the outer hexagonal lug of ratchet shaft upper end fixedly connected with, this multifunctional machinery wrench accords ...

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Номер записи: 16
04-04-2023 дата публикации

Biodegradable paper-plastic composite film as well as preparation method and application thereof

Номер: CN115892736A
Автор: LI HONGGUO, WEI HUAIJIAN, HU WENDA, LI YIGE
Принадлежит:

The invention belongs to the technical field of packaging materials, and particularly relates to a paper-plastic composite film and a preparation method and application thereof. The invention provides a paper-plastic composite film. The paper-plastic composite film comprises paper, a hot melting layer, a supporting layer and a contact layer which are sequentially stacked, each of the hot melting layer and the supporting layer comprises a propylene glycol phthalate-propylene carbonate copolymer and poly (butylene adipate terephthalate); the mass ratio of the propylene glycol phthalate-propylene carbonate copolymer to the poly (butylene adipate terephthalate) in the hot melting layer is (50-90): (10-50); the mass ratio of the propylene glycol phthalate-propylene carbonate copolymer to the poly (butylene adipate terephthalate) in the supporting layer is (10-50): (50-90). The obtained paper-plastic composite film has excellent barrier property.

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Номер записи: 17
23-06-2023 дата публикации

CO2-based biodegradable copolymer composition as well as preparation method and application thereof

Номер: CN116285284A
Автор: LI HONGGUO, LI YIGE, WEI HUAIJIAN, ZHANG JUNLING
Принадлежит:

The invention provides a CO2-based biodegradable copolymer composition as well as a preparation method and application thereof, and belongs to the technical field of plastic materials. The composition disclosed by the invention comprises an epoxypropane-phthalic anhydride-carbon dioxide terpolymer and an epoxypropane-cyclohexene oxide-phthalic anhydride-carbon dioxide quadripolymer which are excellent in high temperature resistance, and an epoxypropane-carbon dioxide bipolymer which is excellent in breaking elongation strain and toughness. According to the composition, the epoxy propane-ethylene oxide-phthalic anhydride-carbon dioxide quadripolymer is adopted, and the dosage of each component is controlled, so that the obtained composition has good high temperature resistance, breaking elongation strain and toughness.

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Номер записи: 18
04-04-2023 дата публикации

High-barrier biodegradable composite packaging film and application thereof

Номер: CN115891368A
Автор: WEI HUAIJIAN, LI HONGGUO, HU WENDA, LI YIGE
Принадлежит:

The invention discloses a high-barrier biodegradable composite packaging film and application thereof, and belongs to the technical field of degradable packaging films. The packaging bag is characterized by at least comprising a supporting layer, a blocking layer and a food contact layer in sequence, the special material for the supporting layer is a PBAT material reinforced and modified by PPCCP; the special material for the barrier layer is a PPCCP material toughened and modified by PBAT and PPC; the special material for the food contact layer is a PLA material toughened and modified by PBAT (Poly (Butyleneadipate-co-Terephthalate)). The high-temperature-resistant biodegradable packaging film provided by the invention is mainly applied to food packaging at the temperature of 100 DEG C or below. PPCCP is introduced and blended with other degradable materials to obtain different functional materials, and then the functional materials are used for preparing the multi-layer composite food ...

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Номер записи: 19
16-05-2023 дата публикации

Carbon dioxide-based biodegradable bottle-shaped plastic container and composition thereof

Номер: CN116120730A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE
Принадлежит:

The invention relates to a carbon dioxide-based biodegradable bottle-shaped plastic container and a composition thereof, and belongs to the technical field of degradable plastic products, the carbon dioxide-based biodegradable bottle-shaped plastic container comprises 5-90 parts of a semi-aromatic carbon dioxide-based copolymer, 10-90 parts of a modified component, and 0-10 parts of an auxiliary agent, the auxiliaries comprise a chain extender, a plasticizer and a lubricant, and the mass ratio of the chain extender to the plasticizer to the lubricant is (1-3): (5-6): (0.2-2). The bottle body of the degradable bottle-shaped plastic container is made of the composition. The material provided by the invention has good light aging resistance and oxidation aging resistance, meets the service life requirement, can realize very good microbial decomposition, achieves the purpose of degradability, has very excellent water resistance, oxygen resistance and carbon dioxide resistance, and is low in ...

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Номер записи: 20
09-06-2023 дата публикации

Continuous production process of carbon dioxide-based biodegradable polymer

Номер: CN116239764A
Автор: LI HONGGUO, YAN YI, WANG BO, LI YIGE
Принадлежит:

The invention discloses a continuous production process of a carbon dioxide-based biodegradable polymer, and belongs to the technical field of degradable plastics. The method is characterized by comprising the following steps: completing carbon dioxide-based multi-component copolymerization in a reaction kettle (1); after the polymer glue solution and the glue solution dissolving agent are continuously mixed in the dissolver (3), a mixed solution is extracted; mixing the mixed solution and a polymer precipitation agent in a precipitation device (4) to obtain a to-be-settled solution; to-be-settled liquid enters the layering device (5) for layering, supernatant liquid continuously overflows from the upper part of the layering device (5), and materials at the bottom are continuously discharged from the bottom of the layering device (5) and then enter the devolatilization machine (6) to remove volatile components. The continuous production process of the carbon dioxide-based biodegradable ...

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Номер записи: 21
28-07-2023 дата публикации

Preparation method of carbon dioxide-based biodegradable foaming material

Номер: CN116496542A
Автор: LI HONGGUO, WANG BO, WEI HUAIJIAN, LI YIGE
Принадлежит:

The invention discloses a preparation method of a carbon dioxide-based biodegradable foaming material, and belongs to the technical field of polymer foaming materials. The preparation method is characterized by comprising the following steps: preparing PPCCP, PLA, PGA and a flexibilizer according to a mass ratio of 100: (1-25): (0-10): (0-20), and blending to obtain a foaming main material; mixing the foaming main material and the auxiliary agent, extruding and foaming to form beads, and further foaming and forming the beads. According to the invention, PLA is mainly utilized to modify PPCCP, and the foamable material with excellent dimensional stability and toughness is obtained; the foaming material can be biodegraded and is high in foaming ratio; the production cost of the raw materials is low, and the heat-preservation packaging and transporting requirements of aquatic products and other products can be met.

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Номер записи: 22
04-07-2023 дата публикации

Modified crystalline polycarbonate

Номер: CN116375989A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE, FU HAI
Принадлежит:

The invention discloses modified crystalline polycarbonate, and belongs to the technical field of degradable polyester. The invention is characterized in that the composition is an ethylene carbonate-lactic acid copolymer (PECLA), a glycol phthalate-ethylene carbonate-lactic acid copolymer (PECPLA) or a propylene glycol phthalate-propylene carbonate-lactic acid copolymer (PPCPLA). According to the invention, a lactide monomer is introduced into a comonomer of polycarbonate, so that crystals can be formed in polyurethane, and the crystalline polycarbonate has good dimensional stability.

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Номер записи: 23
08-08-2023 дата публикации

Vascular plaque extraction device and method

Номер: CN116563201A
Автор: WANG WENJIA, NIE YINGBIN, ZHANG CHEN, LI YIGE
Принадлежит:

The embodiment of the invention provides a blood vessel plaque extraction device and method. The method comprises the following steps: acquiring a computed tomography angiography (CTA) image; carrying out preprocessing on the CTA image; performing vascular cavity segmentation on the preprocessed CTA image to obtain a vascular cavity image; performing dilation operation on the blood vessel cavity image to obtain a dilated region of interest (ROI), and executing voxel-based radiomics feature extraction on the dilated ROI to obtain at least one voxel feature map; and based on a preset threshold value corresponding to the at least one voxel feature map and the at least one voxel feature map, extracting the blood vessel plaque. According to the embodiment of the invention, the blood vessel plaque can be rapidly and accurately extracted from the CTA image, and a reference is provided for accurate quantitative analysis and auxiliary diagnosis and treatment.

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Номер записи: 24
30-06-2023 дата публикации

Preparation method and application of full-bio-based epoxypropane

Номер: CN116354908A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE, FU HAI, WANG BO
Принадлежит:

The invention discloses a preparation method and application of full-bio-based epoxypropane, and belongs to the field of biological materials. The method is characterized by comprising the following steps: carrying out substitution reaction on 1, 2-propylene glycol concentrated liquor and hydrochloric acid to generate 1-chloro-2-propanol and 2-chloro-1-propanol; alkali is added into the chloropropanol concentrated solution, heating is carried out, so that 1-chloro-2-propanol and 2-chloro-1-propanol are subjected to elimination reaction, HCl is removed, ring formation is carried out, epoxypropane is obtained, and polycarbonate or polyether polyol is prepared from epoxypropane. According to the present invention, the full bio-based epoxypropane is prepared, and then the polycarbonate or the polyether polyol with the high bio-based content is prepared, such that the epoxypropane and the application preparation get rid of the dependence on the petrochemical raw material, and the production ...

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Номер записи: 25
28-04-2023 дата публикации

Barrier biodegradable cigarette packaging film and preparation process thereof

Номер: CN116021850A
Автор: LI HONGGUO, WEI HUAIJIAN, LI YIGE
Принадлежит:

The invention discloses a biodegradable cigarette packaging film with barrier property and a preparation process thereof, and belongs to the technical field of degradable materials. The composite film is characterized in that an outer layer, a core layer and an inner layer are compounded to form the composite film, the core layer is a semi-aromatic carbon dioxide based copolymer film, and the outer layer and the inner layer are PLA films; or the core layer is a PLA film, and the outer layer and the inner layer are semi-aromatic carbon dioxide based copolymer films. After the three layers of films are subjected to co-extrusion casting, all the layers can be combined together with high strength, and the composite film is subjected to two-way stretching to reach the required thickness. The cigarette packaging film provided by the invention has excellent physical properties, can be biodegraded, and can replace the existing biaxially oriented polypropylene film for cigarette packaging.

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Номер записи: 26