Silver doped double-layer sulfonated polyphenyl ether proton membrane and preparation method thereof

Abstract

The invention discloses a silver doped double-layer sulfonated polyphenyl ether proton membrane which is composed of the following raw materials in parts by weight: 15-30 parts of a reducing agent, 1.7-2 parts of a dammar resin, 50-60 parts of sulfonated polyphenyl ethe, 30-45 parts of tetraethoxysilane, 10-20 parts of a 1.3-2 mmol / l silver nitrate solution, 6-7 parts of acrylonitrile, 6-7 parts of 37% formaldehyde, 0.1-0.13 part of an initiator, 1-2 parts of polyvinylpyrrolidone, 14-15 parts of a solvent, 4-5 parts of phenol and 0.03-0.04 part of a catalyst. Due to silver doping, a finished product membrane has very good electric conductivity, in addition, silver prepared by using a method disclosed by the invention is good in dispersion uniformity, and a finished product of the double-layer membrane disclosed by the invention is high in elongation rate, high in stress and excellent in comprehensive property.

Description

technical field [0001] The invention belongs to the field of membranes, and in particular relates to a silver-doped double-layer sulfonated polyphenylene ether proton membrane and a preparation method thereof. Background technique [0002] Fuel cell is a high-efficiency power generation device that directly converts chemical energy in fuel and oxidant into electrical energy through electrochemical reaction without combustion. It has the advantages of high energy conversion rate and environmental friendliness. A proton exchange membrane fuel cell is a type of fuel cell. The proton exchange membrane is the core component of the proton exchange membrane fuel cell. It plays a dual role in the fuel cell. It is not only a channel for protons, but also an insulator for electrons, and at the same time, it plays the role of isolating the reactive gases at the two poles. The proton exchange membrane is the key material of the fuel cell, and the research on the proton exchange membran...

AI Technical Summary

Problems solved by technology

However, the price of Nafion membrane is too high, about 800$ / m 2 , which greatly limits the prospect of its wide application;

[0004] Polyphenylene ether has the characteristics of high rigidity, high heat resistance and excellent electrical properties. Its dielectric constant and dielectric loss are small, and it is almost not affected by temperature and humidity. It is suitable as the basic material for anion exchange membranes. At present, there are Using polyphenylene ether as the polymer backbone to graft trimethylamine to synthesize a series of alkaline membranes for fuel cells, which have good performance, but the stress cracking and notched impact strength of polyphenylene ether are low;

[0005] In order to modify this defect, inorganic fillers are often blended with polyphenylene ether to form a film, but after adding inorganic substances, the composite film will become brittle and hard, and the film-forming property will become poor, and it will also affect the proton conduction of the composite film. Rate