Substituted aliphatic polybenzimidazoles as membrane separator materials

摘要

AbstractWhen initially evaluated as potential membrance separators for a heat‐sterilizable silver‐zinc battery, aliphatic polybenzimidazoles (PBI) proved to be unsatisfactory because of their excessively high resistivity. Later, various polymer modifications such as sulfonation,N‐hydroxyethylation,N‐cyanoethylation, andN‐carboxyethylation were made in an attempt to increase the hydrophilicity of the PBI's. As a result of these efforts, anN‐carboxyethylated, suberic acid‐based PBI shows promise as a sterilizable battery separ