Method for producing a membrane made of bridged polymer and...

Details Method for producing a membrane made of bridged polymer and... Method for producing a membrane made of bridged polymer and...

B - Operations, Transporting

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D

B01D 71/06 (2006.01) B01D 67/00 (2006.01) C08G 18/32 (2006.01) C08J 5/18 (2006.01) C08J 5/22 (2006.01) C08K 5/1515 (2006.01) C08K 5/315 (2006.01) H01M 8/12 (2006.01)

Patent

CA 2439686

The invention relates to a membrane made of a bridged polymer produced by a method comprising the following steps: a) production of a solution comprising an alkaline polymer that contains at least one amino acid in a repeat unit and at least one bridging reagent in a suitable solvent, b) pouring of a film using the solution obtained in step a), c) accomplishment of the bridging reaction in the film obtained according to step c), d) doping of the film obtained according to step d) with a strong acid. The method is characterised in that in step a) an alkaline catalyst is also added. The inventive membrane displays visibly improved fracture toughness (elongation at rupture/tension) with near unaltered swelling behaviour. The inventive membranes are suitable for producing membrane-electrode-units for fuel cells.

L'invention concerne une membrane en polymère ponté produite selon un procédé sélectionné. Cette membrane présente une résistance à la rupture nettement améliorée (allongement à la rupture/contrainte) avec des caractéristiques de gonflement pratiquement inchangées. Les membranes selon l'invention s'utilisent pour la production d'unités membrane-électrode destinées à des cellules électrochimiques.

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