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A modification method for improving the mechanical strength of carbon paper

A technology of mechanical strength and carbon paper, applied in the field of irradiation cross-linking modification, can solve the problems of poor mechanical properties of carbon paper, and achieve the effects of improved mechanical properties, simple operation and clean method

Active Publication Date: 2021-04-27
DALIAN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of poor mechanical properties of carbon paper in the prior art, the present invention provides a modification method, which combines gamma ray radiation and chemical crosslinking to generate covalent bonds between carbon nanotubes cross-linking to improve the mechanical properties of carbon paper

Method used

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  • A modification method for improving the mechanical strength of carbon paper
  • A modification method for improving the mechanical strength of carbon paper
  • A modification method for improving the mechanical strength of carbon paper

Examples

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Effect test

Embodiment 1

[0018] Example 1 Ordinary carbon paper radiation crosslinking modification

[0019] (1) Put the pre-modified ordinary carbon paper into gamma rays to receive irradiation, the radiation dose is 100kGy, 10kGy per hour;

[0020] (2) Preparation of cross-linking agent mixed solution: 1% glutaraldehyde, 0.9% glacial acetic acid, 8% anhydrous methanol, 0.9% sulfuric acid, 89.2% deionized water. After the solution is stirred evenly, soak the carbon paper for 2 hours. After waiting for the cross-linking agent to fully react with the carbon paper, wash away the residual cross-linking agent with a large amount of deionized water.

Embodiment 2

[0021] Example 2 Hydroxyl-modified carbon paper radiation cross-linking modification

[0022] (1) Hydroxyl-modified carbon paper: Hydrothermal method under alkaline conditions is used to prepare hydroxyl-modified carbon nanotubes; then hydroxyl-modified carbon paper is prepared by using hydroxyl-based carbon nanotubes;

[0023] (2) Put the hydroxy-modified carbon paper into gamma rays to receive irradiation, the radiation dose is 100kGy, 10kGy per hour;

[0024] (3) Prepare cross-linking agent mixed solution: 1% glutaraldehyde, 0.9% glacial acetic acid, 8% anhydrous methanol, 0.9% sulfuric acid, 89.2% deionized water. After the solution is stirred evenly, soak the carbon paper for 2 hours. After waiting for the cross-linking agent to fully react with the carbon paper, wash away the residual cross-linking agent with a large amount of deionized water.

Embodiment 3

[0025] Example 3 Carboxyl-modified carbon paper radiation cross-linking modification

[0026] (1) Carboxyl-modified carbon paper: use a mixed solution of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1 to oxidize carbon nanotubes to obtain carboxyl carbon nanotubes, and then use carboxyl carbon nanotubes to prepare carboxyl-modified paper. carbon paper;

[0027] (2) Put the pre-modified carbon paper into gamma rays to receive irradiation, the radiation dose is 100kGy, 10kGy per hour;

[0028] (3) Prepare cross-linking agent mixed solution: 1% glutaraldehyde, 0.9% glacial acetic acid, 8% anhydrous methanol, 0.9% sulfuric acid, 89.2% deionized water. After the solution is stirred evenly, soak the carbon paper for 2 hours. After waiting for the cross-linking agent to fully react with the carbon paper, wash away the residual cross-linking agent with a large amount of deionized water.

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Abstract

The invention relates to the modification of carbon paper, in particular to a modification method for improving the mechanical strength of carbon paper. The present invention uses gamma rays to bombard carbon paper to generate hydroxyl, carboxyl, oxygen-containing free radicals and vacancy defects on the surface of carbon nanotubes. The oxygen-containing polar groups can further undergo chemical cross-linking reactions in the subsequent cross-linking agent mixed solution, so the performance of carbon paper can be effectively improved. The mechanical properties of carbon paper after gamma ray irradiation and cross-linking modification are obviously improved. The method provided by the invention is simple, easy to operate and has remarkable effect.

Description

technical field [0001] The invention relates to modification of carbon paper, in particular to a modification method of radiation crosslinking. Background technique [0002] Carbon paper, also known as Buckypaper (BP), utilizes van der Waals force to make carbon nanotubes overlap each other, and is prepared as a porous and thinner paper-like material. Carbon paper, as a carbon nanotube aggregate with a certain strength, retains many excellent characteristics of carbon nanotubes, can be used as a modified material to strengthen the matrix, and effectively solves the shortcomings of carbon nanotubes in polymers that are easy to agglomerate and difficult to disperse . Carbon paper can be used in functional materials such as composite materials, magnetic materials, biosensors, microporous membranes, electrodes and catalysis. [0003] The performance of carbon paper in many applications is mainly influenced by its mechanical properties, whether it is used directly in structures...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/02C04B41/00C04B41/50
CPCC04B30/02C04B41/0045C04B41/009C04B41/5016C04B41/46C04B14/026
Inventor 陈茹边策冯钠孟双
Owner DALIAN POLYTECHNIC UNIVERSITY
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