Crosslinked highly stable anion exchange blend membranes with polyethylene glycols as the hydrophilic membrane phase

摘要

The invention comprises: anion-exchange blend membranes of the following blend components: a halomethylated polymer (a polymer having - (CH 2) x -CH 2 -Hal, Hal = F, Cl, Br, I; x = 0-12), which is reacted with a tertiary or an N-alkylated / N-arylated imidazole, an N-alkylated / N-arylated benzimidazole or an N-alkylated / N-arylated pyrazole is quaternized to an anion exchange polymer. An inert matrix polymer in which the anion exchange polymer is embedded and which is optionally covalently crosslinked with the halomethylated precursor of the anion exchange polymer. - A polyethylene glycol with epoxide or halomethyl end groups anchored by reaction with basic NH groups of the basic matrix polymer under covalent crosslinking - Optionally an acidic polymer that forms ionic crosslinking with the anion exchange polymer (negative acid ion fixations form ionic crosslink sites to the positive ones Cations of the anion exchange polymer) - optionally a sulfinated polymer (polymer with sulfinate groups -SO2Me, Me = any cation) which forms covalent crosslinking bridges with the halomethyl groups of the halomethylated polymer under sulfinate S-alkylation - Process for the preparation of these membranes - Application of these membranes in electrochemical energy change processes (eg, redox-flow batteries and other flow batteries, PEM electrolyses, membrane fuel cells, and other membrane processes (eg, electrodialysis, diffusion dialysis).