Proton-conducting polymer membrane containing polyazole...

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H01M 2/16 (2006.01) C08G 73/18 (2006.01) C08J 5/22 (2006.01) H01M 4/94 (2006.01) B01D 71/62 (2006.01)

Patent

CA 2500792

The invention relates to a proton-conducting polymer membrane which contains polyazoles and is obtained by a method comprising the steps of A) producing a mixture comprising polyphosphoric acid, at least one polyazole (polymer A), and/or at least one or several compounds that are suitable for forming polyazoles under the influence of heat according to step B), B) heating the mixture obtained in step A) to temperatures of up to 400 ~C under inert gas, C) applying a layer to a support by using the mixture according to step A) and/or B), D) treating the membrane formed in step C) until said membrane is self-supporting, at least one additional polymer (polymer B) that represents no polyazole being added to the composition obtained in step A) and/or step B), the weight ratio of the polyazole to polymer B ranging between 0.1 and 50.

L'invention concerne une membrane polymère conductrice de protons contenant des poyazoles. Cette membrane polymère conductrice de protons peut être produite au moyen d'un procédé comprenant les étapes consistant : A) à produire un mélange contenant de l'acide polyphosphorique, au moins un polyazole (polymère A) et/ou au moins un ou plusieurs composés destinés à former des polyazoles lorsqu'ils sont chauffés, comme dans l'étape B) ; B) à chauffer le mélange formé au cours de l'étape A) sous gaz inerte pour le porter à des températures pouvant atteindre 400 ·C ; C) à appliquer une couche sur un support au moyen du mélange formé au cours de l'étape A) et/ou de l'étape B) ; D) à traiter la membrane formée au cours de l'étape C) jusqu'à ce qu'elle soit autoportante, un polymère supplémentaire (polymère B) ne se présentant pas sous la forme d'un polyazole étant ajouté à la composition obtenue au cours de l'étape A) et/ou de l'étape B) et le rapport en poids entre le polyazole et ce polymère B étant compris dans une fourchette allant de 0,1 à 50.

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