Graft polymeric membranes and ion-exchange membranes formed...

B - Operations – Transporting – 01 – D

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B01D 67/00 (2006.01) B01D 71/28 (2006.01) B01D 71/32 (2006.01) B01D 71/34 (2006.01) B01D 71/36 (2006.01) B01D 71/82 (2006.01) C08J 5/22 (2006.01)

Patent

CA 2398836

Graft polymeric membranes and methods for making same are provided in which one or more trifluorovinyl aromatic monomers are radiation graft polymerized to a polymeric base film. The membranes comprise a polymeric base film to which has been graft polymerized substituted .alpha.,.alpha.,.beta.-trifluorostyrene and or .alpha.,.alpha.,.beta.-trifluorovinylnaphthylene monomers which are activated towards graft polymerization. The membranes may be ion-exchange membranes suitable for use in electrode apparatus, including membrane electrode assemblies that may be used in, for example, fuel cells. The membranes may be crosslinked.

L'invention concerne des membranes polymères greffées et des procédés de fabrication de ces dernières, selon lesquels un ou plusieurs monomères aromatiques trifluorovinyliques sont polymérisés par rayonnement avec greffage à un film support polymère. Les membranes comprennent un film support polymère auquel a été polymérisé avec greffage des monomères substitués alpha , alpha , beta -trifluorostyrène et/ou alpha , alpha , beta -trifluorovinylnaphtylène qui sont activés pour une polymérisation avec greffage. Les membranes peuvent être des membranes échangeuses d'ions adéquates pour un appareil à électrode, dont des ensembles électrodes à membrane qui peuvent, par exemple, s'utiliser dans des piles à combustibles. Les membranes peuvent être réticulées.

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