Preparation method of hybrid anion exchange membrane based on brominated polyphenylene ether blend

Abstract

The invention discloses a preparation method of an organic-inorganic hybrid anion exchange membrane based on the blending of brominated polyphenylene ether. ether is blended, then quaternized with a tertiary amine, and then water and a catalyst are added to carry out a sol-gel reaction, and the obtained coating liquid is dried and cured to obtain an organic-inorganic hybrid film. The present invention adopts the blending method to effectively fuse the respective advantages of the polymer precursor and the brominated polyphenylene ether, and overcome their respective disadvantages to a certain extent. The prepared membrane has appropriate water content, higher ion exchange capacity, better thermal and chemical stability, and better mechanical properties, and in addition, the membrane also has very superior electrical conductivity. By adopting the method of the invention, the raw material components can be easily adjusted, and a series of organic-inorganic hybrid ion exchange membranes with excellent properties can be obtained by controlling the content and composition of the components.

Description

technical field

[0001] The invention belongs to the technical field of hybrid anion exchange membrane preparation, in particular to a method for preparing an organic-inorganic hybrid anion exchange membrane by polymer blending and sol-gel reaction. Background technique

[0002] Chinese patent ZL03132271.9 discloses a method for preparing positively charged organic-inorganic hybrid membranes, which involves aminolysis of polyfunctional alkoxysilanes and polymer compounds containing ester groups or epoxy side groups or end groups. Alcoholysis or ring-opening reaction, and then quaternization reaction on the product to obtain a positively charged sol-gel reaction precursor; then the precursor is subjected to a sol-gel reaction to obtain a positively charged organic-inorganic hybrid membrane. The positively charged hybrid membrane prepared by this method overcomes the defects of poor compatibility between the organic phase and the inorganic phase and the low flexibility of the ...