Proton-conducting polymer membrane comprising polyazoles...

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H01M 2/16 (2006.01) B01D 71/62 (2006.01) B01D 71/82 (2006.01) C08G 73/18 (2006.01) C08J 5/22 (2006.01) H01M 4/94 (2006.01) H01G 9/02 (2006.01)

Patent

CA 2500514

The invention relates to proton-conducting polymer membranes comprising phosphonic acid groups containing polyazoles, which can be obtained according to a method comprising the following steps: A) one or several aromatic and/or heteroaromatic tetra amino compounds are mixed with one or several several aromatic and/or heteroaromatic carboxylic acids or the derivatives thereof containing at least two acidic groups per carboxylic monomer, wherein at least one part of the tetra amino compounds and/or carboxylic acids comprises at least one phosphonic acid group, or one or several aromatic and/or heteroaromatic diaminocarboxylic acids, of which at least one part comprises phosphonic acid groups, are mixed in polyphosphonic acid to form a solution and/or dispersion, B) the solution and/or dispersion obtained according to step A is heated in an inert gas to temperatures of up to 350 ~C to form polyazole polymers, C) a layer is applied to a carrier, using the mixture according to step A and/or B, the membrane formed in step C is treated until it becomes self-supporting.

La présente invention concerne des membranes polymères conductrices de protons comprenant des polyazoles contenant des groupes acide phosphonique, ces membranes pouvant être obtenues par un procédé comprenant les étapes suivantes : A) mélange d'un ou de plusieurs composés tétra-amino aromatiques et/ou hétéroaromatiques avec un ou plusieurs acides carboxyliques aromatiques et/ou hétéroaromatiques ou des dérivés de ceux-ci contenant au moins deux groupes acide par monomère d'acide carboxylique, au moins une partie des composés tétra-amino et/ou des acides carboxyliques comprenant au moins un groupe acide phosphonique, ou mélange d'un ou de plusieurs acides diaminocarboxyliques aromatiques et/ou hétéroaromatiques, dont au moins une partie comprend des groupes acide phosphonique, dans de l'acide polyphosphorique pour former une solution et/ou une dispersion, B) chauffage de la solution et/ou de la dispersion, obtenues d'après l'étape A), sous gaz inerte à des températures allant jusqu'à 350 ·C pour former des polymères de polyazole, C) application d'une couche du mélange obtenu d'après l'étape A) et/ou l'étape B) sur un support, D) traitement de la membrane formée à l'étape C) jusqu'à ce que celle-ci soit autoporteuse.

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