METHOD OF PREPARING POLYBENZIMIDAZOLE

摘要

Disclosed is a method of preparing porous polybenzimidazole. The method includes providing polyaminoimide by reacting aromatic amine including at least two ortho-positioned amino groups acid dianhydride, obtaining polypyrrolone form the polyaminoimide, subjecting the polypyrrolone to alkaline-treatment, and subjecting the alkaline-treated polypyrrolone to heat-treatment. The polybenzimidazole shows permeability and selectivity for various gases due to a fractional free volume and well-connected picopores.