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

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...

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