Proton conductive membrane

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 5/22 (2006.01) C08G 61/00 (2006.01) C08L 101/00 (2006.01) H01B 1/06 (2006.01) H01B 13/00 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2548445

[PROBLEMS] To provide a proton conducting membrane exhibiting satisfactory proton conductivity even in low humidity and low temperature environment. [MEANS FOR SOLVING PROBLEMS] There is provided a proton conducting membrane comprised of a copolymer having ion conducting polymer segment (A) and non-ion- conducting polymer segment (B), wherein of the water absorbed upon immersion of the membrane in 90~C water for 30 min, water exhibiting a freezing point of -30 to 0~C amounts to 0.01 to 3.0 g per gram of copolymer. In this copolymer, the main chain skeleton constituting the copolymer has such a structure that aromatic rings are covalent-bonded to each other through bonding groups.

L'invention concerne une membrane conductrice de protons présentant une conductivité protonique satisfaisante même dans des environnements à humidité et à température faibles. La membrane conductrice de protons comprend un copolymère présentant un segment polymère conducteur d'ions (A) et un segment polymère non conducteur d'ions (B), l'eau étant absorbée lors de l'immersion de la membrane dans de l'eau à 90 ·C durant 30 minutes, l'eau présentant un point de gel entre -30 et 0 ·C atteignant 0,01 à 3 grammes par gramme de copolymère. Dans ce copolymère, le squelette de chaîne principale constituant le polymère comporte une structure liant de façon covalente les noyaux aromatiques les uns aux autres par le biais de groupes de liaison.

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