Process for producing proton-conducting polymer membranes,...

Details Process for producing proton-conducting polymer membranes,... Process for producing proton-conducting polymer membranes,...

C - Chemistry, Metallurgy

08

G

C08G 73/18 (2006.01) C08G 73/06 (2006.01) C08G 73/22 (2006.01) C08L 79/06 (2006.01)

Patent

CA 2496589

The invention relates to proton-conducting polymer membranes containing polyazole. Said polymer membranes are obtained by means of a method which comprises the steps of A) producing a mixture comprising polyphosphoric acid, at least one polyazole, and/or at least one or several compounds that are suitable for forming polyazoles when subjected to thermal treatment according to step B), B) heating the mixture obtained in step A) to temperatures of up to 400 ~C under an inert gas atmosphere, C) applying a layer of the mixture obtained in step A) and/or B) to a carrier, D) treating the membrane formed in step C) until said membrane is self-supporting, the treatment being done by means of a hydrolysis liquid that contains phosphorus oxyacids and/or sulfur oxyacids.

L'invention concerne des membranes polymères conductrices de protons contenant des polyazoles, ces membranes étant réalisées par les opérations suivantes : A) préparer un mélange comprenant un acide polyphosphorique, au moins un polyazole et/ou au moins un ou plusieurs composés aptes à la formation de polyazoles sous l'effet de la chaleur conformément à l'étape B) ; B) chauffer le mélange obtenu à l'étape A) sous gaz inerte à des températures allant jusqu'à 400 ·C ; C) appliquer sur un support une couche du mélange obtenu aux opérations A) et/ou B) ; D) traiter la membrane réalisée à l'étape C) pour la rendre autoportante. La membrane est traitée au moyen d'un liquide hydrolytique contenant des oxyacides du phosphore et/ou des oxyacides du soufre.

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