Patent ID: 7837763
Filing Date: 2010-11-23
Classification: B01D,C08G,C08J,H01G,H01M,Y02E,Y02P

Abstract:
1. A method for manufacturing a proton-conducting membrane, based on polyazoles whose molecular weight, measured as intrinsic viscosity, is at least 1.3 dl/g, comprising the steps of: A) mixing of one or more aromatic tetra-amino compounds with one or more aromatic carboxylic acids or their esters, which contain at least two acid groups per carboxylic acid monomers, or mixtures of one or more aromatic and/or heteroaromatic diaminocarboxylic acids; B) heating of the mixture, which can be obtained according to step B), under an inert gas, to temperatures of up to 350° C.; C) comminution of the mass obtained according to step B) and fractionation of the particles obtained; D) heating of the particle fraction of 300 μm to 1000 μm, under an inert gas, to temperatures of up to 450° C. and cooling; E) forming a solution of the polymer from step D) in a solvent; F) casting a film using the solution from step E); G) removing the solvent from the film obtained from step F); and H) doping the film from step G) with at least one doping agent.