Epoxy polyphenyl ether proton membrane and preparation method thereof

Abstract

The invention discloses an epoxy polyphenyl ether proton membrane. The proton membrane comprises the following raw materials in parts by weight: 7 to 9 parts of glycidol, 10 to 14 parts of methyl methacrylate, 70 to 80 parts of polyphenyl ether, 10 to 12 parts of 27 to 30% caprolactam water solution, 3 to 4 parts of doped carbon nanotube, 1 to 3 parts of triethylamine, 0.01 to 0.02 part of lithiummethoxide. The proton membrane takes the glycidol and methyl methacrylate as raw materials, obtains the carbon nanotube modified polyphenyl ether subjected to epoxidation treatment under the catalytic action of lithium methoxide, then the carbon nanotube modified polyphenyl ether is mixed with caprolactam, epoxy is subjected to ring opening under the catalytic action of triethylamine, the formation of the membrane is effectively promoted, meanwhile the dissolving property of polyphenyl ether in dimethyl formamide is improved, the dissolving rate is increased, the material utilization is improved, and the thickness and comprehensive quality of the proton membrane are improved.

Description

technical field [0001] The invention belongs to the field of proton membranes, and in particular relates to an epoxy polyphenylene ether proton membrane and a preparation method thereof. Background technique [0002] The proton exchange membrane is the core component in PEMFC, which determines the performance of the fuel cell. It is not only a diaphragm material, but also can be used as a proton carrier to complete the transfer of protons. At present, the perfluorosulfonic acid Nafion membrane produced by DuPont of the United States is widely used. This type of perfluorosulfonic acid membrane has the advantages of good proton conductivity, strong corrosion resistance, and long service life. However, the high price ($800 / m2), low working temperature (<100°C), high methanol permeability, and environmental problems caused by fluorine-containing materials limit its commercial application. Therefore, it is an important research direction of PEMFC to find new proton exchange ...

AI Technical Summary

Problems solved by technology

However, the high price ($800 / m2), low working temperature (<100°C), high methanol permeability and environmental problems caused by fluorine-containing materials limit its commercial application.

Therefore, it is an important research direction of PEMFC to find new proton exchange membrane materials with low price, high conductivity in a wide temperature range, excellent thermal and chemical stability; however, the current proton membrane has low proton conductivity and poor mechanical properties of the membrane. and other defects