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Preparation of carbon nano tube/acrylic carbon fiber composite carbon fiber paper and use

A technology of acrylonitrile-based carbon fiber and composite carbon fiber, which is applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, fiber raw material treatment, chemical/biochemical treatment paper, etc., and can solve the problem of high brittleness, lack of flexibility, electrode Easy to be destroyed and other problems, to achieve the effect of improving electrical conductivity and flexibility, good electrical conductivity, and wide application

Inactive Publication Date: 2009-10-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon fiber paper is an important part of the gas diffusion layer. As far as carbon fiber paper is concerned, my country's research level is far behind that of foreign countries. Equipment, material resistivity, pore size distribution, strength, etc. cannot meet the actual use needs of PEMFC
[0004] In view of the fact that the existing carbon fiber paper at home and abroad cannot fully meet the requirements of electrical conductivity, thermal conductivity, hydrophobicity and stability, especially the carbon fiber paper is brittle and lacks flexibility, and is easily damaged in the process of preparing electrodes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The acrylonitrile-based carbon fiber is cut, and its length distribution is 2mm20%, 4mm20%, 6mm20%, 8mm20%, 10mm20%, and the carbon fiber is 98% of the mass fraction of the composite;

[0036] The multi-walled carbon nanotubes are 2% of the mass fraction of the composite, and the composite is impregnated with an activator NaOH solution for 1 hour, and then washed with distilled water until neutral;

[0037] Disperse carbon fibers and carbon nanotubes in an aqueous solution with a dispersant polyacrylamide solution, and the amount of polyacrylamide is 1% of the mass fraction of the composite, and at the same time, a binder polyvinyl alcohol is added, and its mass fraction is 5% of the composite;

[0038] Carbon fiber paper can be obtained by using the principle of wet papermaking;

[0039] The carbon fiber paper is dried in a vacuum oven, and then treated with a 15% polytetrafluoroethylene solution (PTFE): carbonizing the obtained carbon fiber paper to obtain the high-pe...

Embodiment 2

[0043] The acrylonitrile-based carbon fiber is cut, and its length distribution is 1mm20%, 3mm20%, 5mm20%, 7mm20%, 9mm20%, and the carbon fiber is 99% of the composite mass fraction;

[0044] The multi-walled carbon nanotubes are 1% of the mass fraction of the composite, and at the same time, the activator H 3 PO 4 After impregnating the complex with the solution for 3 hours, wash with distilled water until neutral;

[0045] Disperse the carbon fibers and carbon nanotubes in the aqueous solution with a dispersant polyethylene oxide solution, the amount of polyethylene oxide is 2% of the composite mass fraction, and at the same time add the binder water-soluble phenolic resin, its mass fraction is 1% of the composite ;

[0046] Carbon fiber paper can be produced by using the principle of wet papermaking;

[0047] The carbon fiber paper is dried in a vacuum oven, and then treated with a 15% polytetrafluoroethylene solution (PTFE): the obtained carbon fiber paper is subjected ...

Embodiment 3

[0051] The acrylonitrile-based carbon fiber is cut, and its length distribution is 2mm20%, 4mm20%, 6mm20%, 8mm20%, 10mm20%, and the carbon fiber is 90% of the mass fraction of the composite;

[0052] The multi-walled carbon nanotubes are 5% of the mass fraction of the composite, and the activator HNO 3 The solution impregnated its complex for 2 hours, and then washed with distilled water until neutral;

[0053] Disperse the carbon fibers and carbon nanotubes in the aqueous solution with a dispersant glycerol solution, the amount of glycerin is 0.5% of the mass fraction of the composite, and at the same time, add a binder modified starch, the mass fraction of which is 15% of the composite;

[0054] Carbon fiber paper can be produced by using the principle of wet papermaking;

[0055] Dry the carbon fiber paper in a vacuum oven, and then treat it with a 15% polytetrafluoroethylene solution (PTFE): carbonize the obtained carbon fiber paper to obtain the high-performance carbon f...

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PUM

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Abstract

The invention discloses the preparation and application of a carbon nanotube / acrylonitrile-based carbon fiber composite carbon fiber paper, which comprises the following steps: (1) soaking the acrylonitrile-based carbon fiber and carbon nanotube with an activator for 1-3 hours, and washing with water until Neutral; (2) Weigh the treated acrylonitrile-based carbon fiber and carbon nanotubes, put them into a beater for beating, make a solution of the dispersant, fully mix with the carbon fiber slurry, and add a binder; (3) Use conventional The composite carbon fiber paper can be obtained by wet papermaking technology. It can be used for antistatic packaging materials, planar heating materials, materials for new energy and electrochemical fields, electromagnetic wave shielding materials, modern weaponry materials, high-quality audio materials and environmental protection materials. The carbon fiber paper material prepared by the invention has good electrical conductivity; the added carbon nanotube can improve its electrical conductivity and flexibility.

Description

technical field [0001] The invention relates to the preparation and use of a novel functional carbon fiber paper with good electrical conductivity, void ratio and hydrophobicity, in particular to the preparation and use of a carbon nanotube / acrylonitrile-based carbon fiber composite carbon fiber paper. Background technique [0002] In the 20th century, especially in the 1970s, due to the successful application of fuel cells in spaceflight, the emergence of a worldwide energy crisis, and the urgent requirements of environmental protection and sustainable development, people have stepped up their search for clean and efficient new energy. The fuel cell system is a new generation of clean energy power system with epoch-making significance. It was rated as one of the "Top Ten Technologies" that changed human life in the 21st century by the US "Time" magazine. The international energy industry predicts that fuel cells will become the fourth generation power generation device afte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H13/50D21D1/00D21H25/02D21H15/02
Inventor 周兆云王华平王朝生张玉梅张传雄王强华
Owner DONGHUA UNIV