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Preparation method of carbon fiber paper

A technology of carbon fiber paper and carbon fiber, which is applied in the direction of non-fiber pulp addition, fiber raw material treatment, fiber dispersant addition, etc., can solve problems such as difficult conditions, insignificant effect, time-consuming and energy-consuming

Pending Publication Date: 2021-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems mainly solved by the present invention is that the carbon fiber activation process in the prior art is time-consuming and energy-consuming, the conditions are not easy to control, and the effect is not significant.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The carbon fibers were chopped and degummed, and then irradiated in an air atmosphere with a radiation dose rate of 10Gy / s, an irradiation time of 1000s, a total irradiation dose of 10kGy, and an irradiation temperature of 20°C. Then add a dispersant and an adhesive, and make a carbon fiber paper precursor through conventional wet papermaking techniques (thawing and beating, paper drying); then impregnate with a thermosetting phenolic resin, and cure at a temperature of 150 ° C and a hot pressing pressure of 5 MPa; Finally, carbonize at 800-1500° C. for 0.5 hour to make the final carbon fiber paper product. Tensile strength (GB_T 20042.7-2014 Proton Exchange Membrane Fuel Cell Part 7 Carbon Paper Characteristic Test Method) 17MPa, surface resistance (GB_T 20042.7-2014 Proton Exchange Membrane Fuel Cell Part 7 Carbon Paper Characteristic Test Method) 7.5mΩ·cm.

Embodiment 2

[0029] The carbon fibers were chopped and degummed, and then irradiated in an air atmosphere, with an irradiation dose rate of 1000Gy / s, an irradiation time of 2000s, a total irradiation dose of 2000kGy, and an irradiation temperature of 20°C. Then add dispersant and binder, and make carbon fiber paper precursor through conventional wet papermaking technology; then impregnate with thermosetting phenolic resin, cure at a temperature of 150°C and a hot pressing pressure of 5MPa; finally carbonize at 800-1500°C 0.5 hours to make the final carbon fiber paper product. The tensile strength is 22MPa, and the surface resistance is 6.3mΩ·cm.

Embodiment 3

[0031] The carbon fibers were chopped and degummed, and then irradiated in an air atmosphere with a radiation dose rate of 1000Gy / s, an irradiation time of 1000s, a total radiation dose of 1000kGy, and an irradiation temperature of 20°C. Then add dispersant and binder, and make carbon fiber paper precursor through conventional wet papermaking technology; then impregnate with thermosetting phenolic resin, cure at a temperature of 150°C and a hot pressing pressure of 5MPa; finally carbonize at 800-1500°C 0.5 hours to make the final carbon fiber paper product. The tensile strength is 24MPa, and the surface resistance is 6.7mΩ·cm.

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Abstract

The invention relates to a preparation method of carbon fiber paper, in particular to a preparation method of carbon fiber paper, which is low in cost, good in conductivity and mechanical property and capable of being used for a gas diffusion layer of a proton exchange membrane fuel cell, and mainly solves the problems that in the prior art, the carbon fiber activation process consumes time and energy, conditions are not easy to control and the effect is not remarkable. The preparation method of the carbon fiber paper comprises the following steps: 1) carrying out irradiation treatment on chopped and degummed carbon fibers in an irradiation medium at the irradiation dose rate of 10-10000 Gy / s and the total irradiation dose of 10-2000 kGy; and 2) adding a dispersing agent and an adhesive into the carbon fiber obtained by irradiation treatment, and preparing a carbon fiber paper precursor by adopting a wet papermaking technology; impregnating with thermosetting phenolic resin, and then curing and carbonizing to prepare the carbon fiber paper. According to the technical scheme, the problems are well solved, and the method can be used for industrial production of the carbon fiber paper.

Description

technical field [0001] The invention relates to a preparation method of carbon fiber paper, in particular to a preparation method of carbon fiber paper with low cost, good electrical conductivity and mechanical properties, which can be used for the gas diffusion layer of a proton exchange membrane fuel cell. [0002] technical background [0003] Proton exchange membrane fuel cell (PEMFC) has the characteristics of high power density, high energy conversion rate, low temperature start-up, no pollution, light and small size, etc. It can be used as the power system of vehicles, mobile small power supply system and The uninterruptible power supply and distributed power station of electronic equipment can also be used as emergency power supply for military, medical, entertainment, etc. PEMFC will also penetrate into all walks of life in society and even ordinary families, which is of great significance to industrial structure upgrading, environmental protection and sustainable ec...

Claims

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Application Information

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IPC IPC(8): D21H13/50D21H15/02D21H21/08D21H17/36D21H17/48
CPCD21H13/50D21H15/02D21H21/08D21H17/36D21H17/48
Inventor 陈辉沈志刚李磊
Owner CHINA PETROLEUM & CHEM CORP