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

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Применить Всего найдено 21. Отображено 21.
24-09-2014 дата публикации

Preparation method of polyvinylidene fluoride grafted styrene sulfonate electrolyte membrane

Номер: CN104059240A
Автор: HAO YAN, GUO GUIBAO, SUN XIAO, AN SHENGLI
Принадлежит:

The invention relates to a preparation method of a polyvinylidene fluoride grafted styrene sulfonate electrolyte membrane, and belongs to the field of battery electrolyte materials. The method is as follows: firstly, polyvinylidene fluoride powder is dispersed in a methanol solution in a nitrogen atmosphere, and a quaternary ammonium base is added for mixing, sedimentation, filtration, drying to obtain modified polyvinylidene fluoride powder; the modified powder, styrene and benzoyl peroxide are added into methanol for heating in the nitrogen atmosphere for reaction, the precipitation is filtered, then extracted by use of trichloromethane, and then dried to obtain the modified polyvinylidene fluoride grafted styrene powder; the powder is dissolved in an organic solvent, stirred, cooled, spread on a glass plate, then dried, and sulfonated in concentrated sulfuric acid to obtain the electrolyte membrane. The modified modified polyvinylidene fluoride grafted styrene sulfonate electrolyte membrane ...

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Номер записи: 1
04-05-2011 дата публикации

Damping rubber

Номер: CN0102040823A
Автор: Sun Xinguo, Zhu Yaoyi, Guo Guibao, Chen Xiang
Принадлежит:

The invention relates to damping rubber which is characterized in that the main material of the damping rubber comprises the main ingredients of polyether polyurethane rubber and polyester polyurethane rubber, and the mass ratio of the polyether polyurethane rubber to the polyester polyurethane rubber is (60-80):(40-20); the damping rubber also comprises polynorbornene rubber, and the mass of polynorbornene rubber is 10-15% of the total mass of the polyether polyurethane rubber and the polyester polyurethane rubber. The damping rubber of the invention solves the problems of low specific strength, small stressed deformation quantity, low restoring speed and great permanent deformation quantity of the traditional rubber spring.

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Номер записи: 2
19-03-2014 дата публикации

Preparation method of quaternary ammonium hydroxide-modified polyvinylidene fluoride-grafted sulfonated styrene film

Номер: CN103642061A
Автор: GUO GUIBAO, PENG JIHUA, LIU SHUTI, AN SHENGLI, ZHU JIANCHAO
Принадлежит:

The invention relates to a preparation method of a quaternary ammonium hydroxide-modified polyvinylidene fluoride-grafted sulfonated styrene film, is a proton exchange membrane and belongs to the field of a fuel cell electrolyte material. The method comprises the following steps: firstly, dissolving polyvinylidene fluoride powder into an organic solvent, so as to obtain a colorless transparent solution; adding a quaternary ammonium alkali alcohol solution to the solution; heating and magnetically stirring in a nitrogen atmosphere; paving the solution on a glass plate; drying and filming; preparing a styrene solution; putting the obtained dry film into the styrene solution; adding an initiator, and carrying out grafting reaction in the nitrogen atmosphere; finally, taking out the film and putting into concentrated sulfuric acid to sulfonate; washing for a plurality of times by deionized water, so as to obtain the quaternary ammonium hydroxide-modified polyvinylidene fluoride-grafted sulfonated ...

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Номер записи: 3
28-07-2010 дата публикации

Preparation method of silicotungstic acid/silicon dioxide polyvinyl alcohol proton exchange membrane

Номер: CN0101787140A
Автор: SHENGLI AN, GUIBAO GUO, ERDING HAN, AN SHENGLI, GUO GUIBAO, HAN ERDING
Принадлежит:

The invention relates to a preparation method of a silicotungstic acid/silicon dioxide polyvinyl alcohol proton exchange membrane, belonging to the field of battery electrolyte materials. The preparation method comprises the following steps of: firstly solving the polyvinyl alcohol in deionized water to prepare a macromolecular solution, adding silicon compounds and sodium tungstate to the prepared solution, heating and mixing to form a solution, pouring the solution on a polytetrafluoroethylene glass plate and drying to form a membrane, and then obtaining the required silicotungstic acid/silicon dioxide polyvinyl alcohol proton exchange membrane. The prepared proton exchange membrane has great proton conductivity and low methanol permeability and is convenient for the large-scale production.

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Номер записи: 4
24-09-2008 дата публикации

Generating method for crassitude carbon nano-tube and carbon nano-fibre in carbon composite refractory material

Номер: CN0101269980A
Автор: SHENGLI AN, WEI GUO, WENGUANG ZHAO, XIWEN SONG, YONGWANG ZHAO, GUIBAO GUO, LI HAN, AN SHENGLI, GUO WEI, ZHAO WENGUANG, SONG XIWEN, ZHAO YONGWANG, GUO GUIBAO, HAN LI
Принадлежит:

The present invention relates to a method used for preparing a stout carbon nanotube and carbon nanofiber in a carbon composite refractory material. The method is characterized in that raw materials are prepared according to the requirement for the ingredients that are used for preparing the carbon composite refractory material; nickel nitrate with 0.5 to 3 weight percent of the total materials is used for preparing the aqueous solution with the concentration of 10 percent; the aqueous solution is fully mixed with the plate-shaped alundum powder or flake graphite in the refractory material that is used for preparing the carbon composite refractory material; the mixture is dried until the content of water is 1 to 2 weight percent; the raw materials that is mixed with the nickel nitrate is mixed with other residual raw materials that are used for preparing the carbon composite refractory material; the stout carbon nanotube and carbon nanofiber can grow in the carbon composite refractory material ...

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Номер записи: 5
15-09-2010 дата публикации

Thermoelectric refrigeration liquid cooling device

Номер: CN0101835369A
Автор: YONGLIANG CUI, GUIBAO GUO, WENXIU HE, YAXIONG WANG, CUI YONGLIANG, GUO GUIBAO, HE WENXIU, WANG YAXIONG
Принадлежит:

The invention relates to a thermoelectric refrigeration liquid cooling device, and belongs to a refrigeration plant. Thermoelectric refrigeration films and radiators are symmetrically arranged on two sides of a micro channel refrigeration exchanger; the micro channel refrigeration exchanger and a micro channel cooling plate are respectively arranged on the top and bottom of a hollow substrate; the micro channel refrigeration exchanger is provided with a liquid inlet and a liquid outlet which are connected by a hose; a water pump is arranged on the hose; two side walls of the micro channel refrigeration exchanger are symmetrically provided with micro channels; a plurality of micro channels are formed parallelly on the micro channel cooling plate; upper and lower runner division plates are arranged among the micro channels; and the micro channels on the micro channel refrigeration exchanger are communicated with those on the micro channel cooling plate. The thermoelectric refrigeration liquid ...

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Номер записи: 6
28-07-2010 дата публикации

Method for preparing proton exchange membrane with polyvinylidene fluoride grafted and grafting copolymerized with 2-acrylamido-2-methylpropanesulfonic acid

Номер: CN0101787141A
Автор: SHENGLI AN, GUIBAO GUO, ERDING HAN, SHASHA KOU, JUNBIN WANG, AN SHENGLI, GUO GUIBAO, HAN ERDING, KOU SHASHA, WANG JUNBIN
Принадлежит:

The invention relates to a method for preparing proton exchange membrane with polyvinylidene fluoride grafted and grafting copolymerized with 2-acrylamido-2-methylpropanesulfonic acid, which belongs to the field of battery electrolyte material. The method comprises: dissolving a silicon compound in water-containing N-methyl pyrrolidone solution; adding polyvinylidene fluoride PVDF and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) to the solution; adding initiator; heating and stirring; casting the solution onto a clean glass plate; drying the obtained product; and removing membrane to obtain graft copolymer membrane with modified PVDF and 2-acrylamido-2-methylpropanesulfonic acid. The proton exchange membrane prepared by the method not only has good proton-conducting pieces, but also is convenient for mass production.

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Номер записи: 7
12-03-2014 дата публикации

Method for preparing modified polyvinylidene fluoride one-step grafted 3-sulfonic acid propyl methacrylate (SPMA) proton exchange membrane

Номер: CN103626922A
Автор: LANG ZHONGMIN, GUO GUIBAO, ZHANG DONG, AN SHENGLI
Принадлежит:

The invention relates to a method for preparing a modified polyvinylidene fluoride one-step grafted 3-sulfonic acid propyl methacrylate (SPMA) proton exchange membrane, which belongs to the field of battery electrolyte materials. The method provided by the invention comprises the following steps: firstly dissolving polyvinylidene fluoride in an organic solvent in a nitrogen atmosphere, heating and stirring the solution, adding a quaternary ammonium base alcohol solution, reacting for a period of time, and heating to obtain a modified polyvinylidene fluoride solution; meanwhile, adding a certain amount of 3-sulfonic acid propyl methacrylate (SPMA) monomers and an initiator in the modified polyvinylidene fluoride solution, heating and reacting in the nitrogen atmosphere, cooling and paving the solution on a clean glass plate, and vacuum drying the solution to obtain the modified polyvinylidene fluoride one-step grafted 3-sulfonic acid propyl methacrylate proton exchange membrane. The modified ...

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Номер записи: 8
12-03-2014 дата публикации

Method for preparing modified polyvinylidene fluoride one-step grafted styrene sulfonic acid proton exchange membrane

Номер: CN103626923A
Автор: GUO GUIBAO, GUO XIAOHUI, NI TIANZI, AN SHENGLI
Принадлежит:

The invention relates to a method for preparing a modified polyvinylidene fluoride one-step grafted styrene sulfonic acid proton exchange membrane, which belongs to the field of battery electrolyte materials. The method provided by the invention comprises the following steps: firstly dissolving polyvinylidene fluoride in an organic solvent in a nitrogen atmosphere, heating and stirring to fully dissolve the polyvinylidene fluoride, adding a quaternary ammonium base alcohol solution, reacting for a period of time, and heating to volatilize the unreacted quaternary ammonium base and related fluoride products to obtain a modified polyvinylidene fluoride solution; meanwhile, dissolving a certain amount of styrene sulfonic acid (SSA) monomers in dimethyl sulfoxide, adding the modified polyvinylidene fluoride solution and an initiator in the dimethyl sulfoxide solution, heating and reacting in the nitrogen atmosphere, paving the solution on a glass plate, and vacuum drying the solution to obtain ...

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Номер записи: 9
12-03-2014 дата публикации

Polyvinylidene fluoride powder modifying method

Номер: CN103626901A
Автор: GUO GUIBAO, HAO YAN, AN SHENGLI, LIU SHUTI, BAN HUI
Принадлежит:

The invention relates to a preparation method of modified polyvinylidene fluoride powder, and belongs to the field of membrane materials. The preparation method comprises the following steps: firstly dispersing polyvinylidene in an organic alkali alcoholic solution in nitrogen atmosphere, stirring, reacting for a period of time, filtering, washing by using an alcoholic solution, heating in nitrogen atmosphere, and drying so as to obtain the required modified polyvinylidene fluoride powder without hydrogen fluoride. The modified polyvinylidene fluoride powder prepared by the method has relatively good active sites such as carbon-carbon double bond and is convenient for large-scale production.

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Номер записи: 10
26-10-2011 дата публикации

Preparation method of silicotungstic acid/silicon dioxide polyvinyl alcohol proton exchange membrane

Номер: CN0101787140B
Автор: SHENGLI AN, GUIBAO GUO, ERDING HAN, AN SHENGLI, GUO GUIBAO, HAN ERDING
Принадлежит:

The invention relates to a preparation method of a silicotungstic acid/silicon dioxide polyvinyl alcohol proton exchange membrane, belonging to the field of battery electrolyte materials. The preparation method comprises the following steps of: firstly solving the polyvinyl alcohol in deionized water to prepare a macromolecular solution, adding silicon compounds and sodium tungstate to the prepared solution, heating and mixing to form a solution, pouring the solution on a polytetrafluoroethylene glass plate and drying to form a membrane, and then obtaining the required silicotungstic acid/silicon dioxide polyvinyl alcohol proton exchange membrane. The prepared proton exchange membrane has great proton conductivity and low methanol permeability and is convenient for the large-scale production.

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Номер записи: 11
12-03-2014 дата публикации

Method for preparing modified polyvinylidene fluoride one-step grafted sulfobetaine (SBMA) proton exchange membrane

Номер: CN103627013A
Автор: ZHANG JIAHAN, GUO GUIBAO, YANG HUI, AN SHENGLI, LIU SHUTI
Принадлежит:

The invention relates to a method for preparing a modified polyvinylidene fluoride one-step grafted sulfobetaine (SBMA) proton exchange membrane, which belongs to the field of fuel cell electrolyte membrane materials. The method provided by the invention comprises the following steps: firstly dissolving polyvinylidene fluoride in dimethyl sulfoxide in a nitrogen atmosphere, heating and stirring to fully dissolve the polyvinylidene fluoride, adding a quaternary ammonium base alcohol solution, reacting for a period of time, and heating to volatilize the unreacted quaternary ammonium base and related fluoride products to obtain a modified polyvinylidene fluoride solution; meanwhile, adding a certain amount of sulfobetaine (SBMA) monomers and an initiator in the solution, heating and reacting in the nitrogen atmosphere, cooling and paving the solution on a glass plate, and vacuum drying the solution to a membrane to obtain the modified polyvinylidene fluoride grafted sulfobetaine proton exchange ...

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Номер записи: 12
12-03-2014 дата публикации

Method for preparing modified polyvinylidene fluoride electrolyte membrane

Номер: CN103627017A
Автор: GUO GUIBAO, YAN KAIBO, AN SHENGLI, LIU SHUTI, BAN HUI
Принадлежит:

The invention relates to a method for preparing a modified polyvinylidene fluoride electrolyte membrane, which is a proton exchange membrane for a fuel battery and belongs to the field of battery electrolyte materials. The method provided by the invention comprises the following steps: firstly dissolving polyvinylidene fluoride powder in an organic solvent to obtain a colorless and transparent solution, casting the solution onto a glass plate, and vacuum drying the solution to a membrane; soaking the polyvinylidene fluoride membrane in a quaternary ammonium base alcohol solution with a certain concentration, soaking the polyvinylidene fluoride membrane for multiple hours in a nitrogen atmosphere, taking out the discolored polyvinylidene fluoride membrane, and cleaning the discolored polyvinylidene fluoride membrane through deionized water; then, preparing a styrene solution, placing the discolored polyvinylidene fluoride membrane in the styrene solution, and adding an initiator to generate ...

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Номер записи: 13
06-06-2023 дата публикации

Shaft runout measuring device

Номер: CN116222344A
Автор: KUANG XUEJUN, YANG SHENGQIANG, GUO GUIBAO, SHEN RONGJIAN, ZHANG WENQUAN, FU KUI, LIU YONGSHENG, DENG DEQUN, XU QIUFU, LIN FU
Принадлежит:

The invention relates to the technical field of shafting runout and straightness measurement, in particular to a shaft runout measuring device which comprises at least two inter-shaft supporting assemblies, each inter-shaft supporting assembly comprises a first support, two supporting rollers and two radial rollers are symmetrically arranged on each first support, the supporting rollers are correspondingly located below a to-be-measured shaft, and the radial rollers are located below the to-be-measured shaft; the radial roller is correspondingly positioned on the outer side of the supporting roller and is in contact with the shaft to be measured; wherein one first support is further provided with a driving assembly, and the driving assembly is in linkage with the two supporting idler wheels on the first support. The flange supporting assembly comprises a second support, two axial rollers are symmetrically arranged on the second support, and the two axial rollers are used for being in contact ...

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Номер записи: 14
18-01-2012 дата публикации

Thermoelectric refrigeration liquid cooling device

Номер: CN0101835369B
Автор: YONGLIANG CUI, GUIBAO GUO, WENXIU HE, YAXIONG WANG, CUI YONGLIANG, GUO GUIBAO, HE WENXIU, WANG YAXIONG
Принадлежит:

The invention relates to a thermoelectric refrigeration liquid cooling device, and belongs to a refrigeration plant. Thermoelectric refrigeration films and radiators are symmetrically arranged on two sides of a micro channel refrigeration exchanger; the micro channel refrigeration exchanger and a micro channel cooling plate are respectively arranged on the top and bottom of a hollow substrate; the micro channel refrigeration exchanger is provided with a liquid inlet and a liquid outlet which are connected by a hose; a water pump is arranged on the hose; two side walls of the micro channel refrigeration exchanger are symmetrically provided with micro channels; a plurality of micro channels are formed parallelly on the micro channel cooling plate; upper and lower runner division plates are arranged among the micro channels; and the micro channels on the micro channel refrigeration exchanger are communicated with those on the micro channel cooling plate. The thermoelectric refrigeration liquid ...

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Номер записи: 15
16-02-2011 дата публикации

Method for synthesizing beta cellulose in aluminum-carbon refractory material

Номер: CN0101186507B
Автор: ZHAO WENGUANG, GUO WEI, AN SHENGLI, GUO GUIBAO, ZHAO YONGWANG, SONG XIWEN, WENGUANG ZHAO, WEI GUO, SHENGLI AN, GUIBAO GUO, YONGWANG ZHAO, XIWEN SONG
Принадлежит:

The invention relates to a method for synthesis beta sialon within aluminum-carbon refractory, which is characterized in that: nickel nitrate taking up 1 to 3 percent of total weight of material is made into solution with 10 percent of concentration, and fully mixed with alumina used for making aluminum-carbon refractory, then dried for eliminating water; according to the preparation technique ofaluminum-carbon refractory, the alumina material mixed with nickel nitrate and the materials metal silicon powder and sic powder for preparation aluminum-carbon refractory and bond phenolic resin areexperienced the steps: mixing, calendaring, forming, drying and burying carbon sintering under the temperature less than 1450 DEG C, and then the beta-sialon crystal grows out from the aluminum-carbon refractory. The invention has the advantages that: the nitridation sintering process under high temperature, high pressure and nitrogen atmosphere in the existing beta sialon synthesis technique is avoided ...

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Номер записи: 16
10-03-2010 дата публикации

Method for preparing carbon nano-tube and carbon nano-fibre by using phenol resin as carbon source

Номер: CN0100593511C
Автор: AN SHENGLI, GUO WEI, ZHAO WENGUANG, SONG XIWEN, ZHANG JIANQI, ZHAO YONGWANG, GUO GUIBAO, SHENGLI AN, WEI GUO, WENGUANG ZHAO, XIWEN SONG, JIANQI ZHANG, YONGWANG ZHAO, GUIBAO GUO
Принадлежит:

The invention relates to a method for preparing carbon nanotubes and carbon nanofiber with phenolic resin as the carbon source. The method includes the following steps: preparing 10wt % aqueous solution from 1-3wt% based on base material weight into the nickel nitrate, and mixing with the base material which is at least one out of alumina powder and crystalline flake graphite and baked to remove the moisture; adding 3-15wt% phenolic resin to the base material mixed with nickel nitrate catalyst, mixing, and pressing under a pressure of 100-200MPa to obtain the lump material; drying into a drying oven until moisture content reaches 1.0-2.0wt%, carbon burial heating in a resistance furnace up to 1,200-1,450 DEG C and holding for 4-5 hours, and cooling to 0-45 DEG C to grow carbon nanotubes orcarbon nanofiber on the alumina and graphite substrate. The method has the advantages that the preparation method and process are simple and the processing parameters are easily controlled; carbon source ...

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Номер записи: 17
28-05-2008 дата публикации

Method for synthesizing beta cellulose in aluminum-carbon refractory material

Номер: CN0101186507A
Автор: SHENGLI AN, WEI GUO, WENGUANG ZHAO, XIWEN SONG, YONGWANG ZHAO, GUIBAO GUO, AN SHENGLI, GUO WEI, ZHAO WENGUANG, SONG XIWEN, ZHAO YONGWANG, GUO GUIBAO
Принадлежит:

The invention relates to a method for synthesis beta sialon within aluminum-carbon refractory, which is characterized in that: nickel nitrate taking up 1 to 3 percent of total weight of material is made into solution with 10 percent of concentration, and fully mixed with alumina used for making aluminum-carbon refractory, then dried for eliminating water; according to the preparation technique of aluminum-carbon refractory, the alumina material mixed with nickel nitrate and the materials metal silicon powder and sic powder for preparation aluminum-carbon refractory and bond phenolic resin are experienced the steps: mixing, calendaring, forming, drying and burying carbon sintering under the temperature less than 1450 DEG C, and then the beta-sialon crystal grows out from the aluminum-carbon refractory. The invention has the advantages that: the nitridation sintering process under high temperature, high pressure and nitrogen atmosphere in the existing beta sialon synthesis technique is avoided ...

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Номер записи: 18
12-03-2014 дата публикации

Method for preparing modified polyvinylidene fluoride one-step grafted 2-acrylyl amino-2-methyl-1-proplate sulfonic acid proton exchange membrane

Номер: CN103627014A
Автор: GUO GUIBAO, LIU SHUTI, ZHOU XING, AN SHENGLI
Принадлежит:

The invention relates to a method for preparing a modified polyvinylidene fluoride one-step grafted 2-acrylyl amino-2-methyl-1-proplate sulfonic acid proton exchange membrane, which belongs to the field of polymer electrolyte membrane materials. The method provided by the invention comprises the following steps: firstly dissolving polyvinylidene fluoride in an organic solvent in a nitrogen atmosphere, stirring, adding a quaternary ammonium base alcohol solution, reacting for a period of time, and heating to obtain a modified polyvinylidene fluoride solution; meanwhile, adding a certain amount of 2-acrylyl amino-2-methyl-1-proplate sulfonic acid (AMPS) monomers and an initiator in the organic modified polyvinylidene fluoride solution, heating to react in the nitrogen atmosphere, cooling and casting the solution onto a glass plate, drying the solution to a membrane to obtain the modified polyvinylidene fluoride one-step grafted 2-acrylyl amino-2-methyl-1-proplate sulfonic acid proton exchange ...

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Номер записи: 19
03-09-2008 дата публикации

Method for preparing carbon nano-tube and carbon nano-fibre by using phenol resin as carbon source

Номер: CN0101254911A
Автор: SHENGLI AN, WEI GUO, WENGUANG ZHAO, XIWEN SONG, JIANQI ZHANG, YONGWANG ZHAO, GUIBAO GUO, AN SHENGLI, GUO WEI, ZHAO WENGUANG, SONG XIWEN, ZHANG JIANQI, ZHAO YONGWANG, GUO GUIBAO
Принадлежит:

The invention relates to a method for preparing carbon nanotubes and carbon nanofiber with phenolic resin as the carbon source. The method includes the following steps: preparing 10wt % aqueous solution from 1-3wt% based on base material weight into the nickel nitrate, and mixing with the base material which is at least one out of alumina powder and crystalline flake graphite and baked to remove the moisture; adding 3-15wt% phenolic resin to the base material mixed with nickel nitrate catalyst, mixing, and pressing under a pressure of 100-200MPa to obtain the lump material; drying into a drying oven until moisture content reaches 1.0-2.0wt%, carbon burial heating in a resistance furnace up to 1,200-1,450 DEG C and holding for 4-5 hours, and cooling to 0-45 DEG C to grow carbon nanotubes or carbon nanofiber on the alumina and graphite substrate. The method has the advantages that the preparation method and process are simple and the processing parameters are easily controlled; carbon source ...

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Номер записи: 20
08-09-2010 дата публикации

Generating method for crassitude carbon nano-tube and carbon nano-fibre in carbon composite refractory material

Номер: CN0101269980B
Автор: GUO WEI, AN SHENGLI, ZHAO WENGUANG, ZHAO YONGWANG, HAN LI, SONG XIWEN, GUO GUIBAO, WEI GUO, SHENGLI AN, WENGUANG ZHAO, YONGWANG ZHAO, LI HAN, XIWEN SONG, GUIBAO GUO
Принадлежит:

The present invention relates to a method used for preparing a stout carbon nanotube and carbon nanofiber in a carbon composite refractory material. The method is characterized in that raw materials are prepared according to the requirement for the ingredients that are used for preparing the carbon composite refractory material; nickel nitrate with 0.5 to 3 weight percent of the total materials is used for preparing the aqueous solution with the concentration of 10 percent; the aqueous solution is fully mixed with the plate-shaped alundum powder or flake graphite in the refractory material that is used for preparing the carbon composite refractory material; the mixture is dried until the content of water is 1 to 2 weight percent; the raw materials that is mixed with the nickel nitrate is mixed with other residual raw materials that are used for preparing the carbon composite refractory material; the stout carbon nanotube and carbon nanofiber can grow in the carbon composite refractorymaterial ...

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Номер записи: 21