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Membrane composite polymère fluoré/polyélectrolyte pour pile à combustible: relations structure-propriétés

Abstract : A blend of Kynar-PVDF and poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS) is considered as a potential fuel cell membrane. The blend is done in solution in dimethylformamide (DMF) and the membrane is solvent-cast at different temperatures.
The solubilities in DMF of both the polyelectrolyte and the blend are studied. Blend morphologies and Kynar crystallinity are also examined. An LCST behaviour is observed. The use of tetrabutylammonium (TBA) as PAMPS counterions gives rise to miscible blends. For use as a fuel cell membrane, an ion exchange is then performed to obtain the polyelectrolyte in its acid form. The water permeability and the ionic conductivity are thus characterized. Bicontinuous-type nanostructures display particularly efficient properties for the target application. To stabilize this morphology, a cross-linkable polyelectrolyte copolymer is synthesized.
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Submitted on : Thursday, April 26, 2007 - 4:09:00 PM
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  • HAL Id : tel-00143683, version 1


Cécile Gibon. Membrane composite polymère fluoré/polyélectrolyte pour pile à combustible: relations structure-propriétés. Matériaux. Université Pierre et Marie Curie - Paris VI, 2006. Français. ⟨tel-00143683⟩



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