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Method for improving matrix fiber characteristic of PTFE micro-porous membrane

A matrix fiber and PTFE technology, which is applied in the field of improving the properties of the matrix fiber of PTFE microporous membranes for fuel cells, can solve the problems of complex process, unsuitable for commercial production requirements, and high cost

Active Publication Date: 2019-11-15
苏州创明氢电材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the method to improve the matrix fiber properties of PTFE microporous membrane is to add a crosslinking agent to make the PTFE membrane three-dimensional network structure, and then improve its comprehensive performance. Although this method can achieve the expected effect, it destroys the original molecular structure. , has a great influence on the porosity and pore structure of the microporous membrane, and the cost is high, the process is complicated, and it is not suitable for commercial production needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example provides a kind of method of improving PTFE microporous membrane matrix fiber characteristic, is characterized in that, is by coating with mixed additive coating on the surface of PTFE microporous membrane matrix fiber, to improve the tensile strength of membrane matrix microporous PTFE, Improve the ability of the matrix to eliminate hydroxyl radicals and peroxyl radicals, thereby improving the anti-oxidation chemical stability of the finished reinforced film.

[0031] Further, the method for improving the fiber characteristics of the PTFE microporous membrane matrix is ​​characterized in that the mixed additive coating is made of the following raw materials in parts by weight: a mass fraction of 25% perfluorosulfonic acid resin dispersed 10 parts of liquid, 5 parts of SPEEK, 40 parts of ethanol, 35 parts of water, 0.05 parts of nano-titanium dioxide with a particle size of 10 nm, 0.1 part of sulfonated graphene quantum dots with a particle size of 10 nm and...

Embodiment 2

[0039] This example provides a kind of method that improves PTFE microporous membrane matrix fiber characteristic, and it is basically consistent with example 1, and difference is that described mixed additive coating is made up of each raw material of following weight portion: mass fraction is 25 10 parts of perfluorosulfonic acid resin dispersion, 7 parts of SPEEK, 44 parts of ethanol, 37 parts of water, 0.02 parts of nano-silica with a particle size of 25nm, 0.5 parts of sulfonated graphene quantum dots, macrocyclic cobalt phthalocyanine 0.02 parts of sulfonic acid sodium salt, 0.03 parts of manganese phthalocyanine sulfonic acid sodium salt.

Embodiment 3

[0041] This example provides a kind of method that improves PTFE microporous membrane matrix fiber characteristic, and it is basically consistent with example 1, and difference is that described mixed additive coating is made up of each raw material of following weight portion: mass fraction is 25 5 parts of perfluorosulfonic acid resin dispersion, 10 parts of SPEEK, 45 parts of ethanol, 34 parts of water, 0.05 parts of nano-titanium dioxide with a particle size of 10nm, 1 part of graphene oxide quantum dots, 0.03 parts of macrocyclic cobalt phthalocyanine sulfonic acid sodium salt parts, 0.04 parts of sodium manganese phthalocyanine sulfonate.

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Abstract

The invention relates to a method for improving the matrix fiber characteristic of a PTFE micro-porous membrane, which is characterized in that a mixed additive coating is applied to the matrix fibersurface of a PTFE micro-porous membrane to increase the tensile strength, improve the ability to eliminate the hydrogen oxygen free radical and the peroxy free radical and thus improve the anti-oxidation chemical stability of the finished enhanced membrane. The mixed additive coating is made of the following materials by weight: 1-20 parts of perfluorinated sulfonic acid resin dispersion with a mass fraction of 20-30%, 0-10 parts of SPEEK, 30-50 parts of ethanol, 30-40 parts of water, 0-0.1 parts of nano oxide material, 0.02-2 parts of functional graphene quantum dots, 0-0.1 parts of macro-cyclic molecular cobalt phthalocyanine sodium sulfonate and 0-0.1 parts of manganese phthalocyanine sodium sulfonate. The method disclosed by the invention is simple, easy to operate, low in implementation cost and efficient, has a good effect on the improvement of the matrix fiber characteristic of a PTFE micro-porous membrane, and can improve the chemical mechanical stability of a proton exchange membrane and prolong the service life.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, relates to a fuel cell component, in particular to a method for improving the fiber properties of a PTFE microporous membrane matrix used in a fuel cell. Background technique [0002] With the advancement of science and technology and the deepening of people's understanding of energy and environmental issues, clean new energy devices have become an urgent need in the industry. Proton exchange membrane fuel cells stand out from many clean new energy devices due to their high efficiency, cleanliness, high power density and energy conversion efficiency, fast start-up, no pollution, light size, insensitivity to pressure changes, and long battery life. , has become the preferred clean and efficient power generation device for people at present. Its appearance has brought hope to developers in the industry and has been widely welcomed by people. [0003] Proton exchange membrane is a common diaphra...

Claims

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Application Information

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IPC IPC(8): H01M8/1086H01M8/1088H01M8/1051H01M8/1039
CPCH01M8/1039H01M8/1051H01M8/1086H01M8/1088H01M2008/1095Y02E60/50
Inventor 田文迪王永霞田丙伦傅婧乔锦丽
Owner 苏州创明氢电材料科技有限公司
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