Membranes comprising sulfonated polyether ketone and another...

Details Membranes comprising sulfonated polyether ketone and another... Membranes comprising sulfonated polyether ketone and another...

B - Operations, Transporting

01

D

B01D 71/52 (2006.01) B01D 71/64 (2006.01) B01D 71/68 (2006.01) C08J 5/22 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2347090

Membranes comprising from 30 to 99.5% by weight of a sulfonated, strictly alternating polyether ketone (A) having repeat units of the formula (I) -Ar-O-Ar'-CO-, where Ar and Ar', independently of one another, are bivalent aromatic radicals, with an ion-exchange capacity of from 1.3 to 4.0 meq of -SO3H/g of polymer and from 0.5 to 70% by weight of a partially fluorinated, nonfluorinated or perfluorinated polymer (B) are described. The membranes may be used in fuel cells.

L'invention concerne des membranes contenant 30 à 99,5 % en poids d'un polyéthercétone (A) sulfoné et fortement alterné avec des unités récurrentes de la formule (I), -Ar-O-Ar'-CO-, Ar et Ar' représentant indépendamment l'un de l'autre des restes aromatiques bivalents, et ayant une aptitude d'échange ionique de 1.3 à 4.0 meq (-SO3H)/g (Polymère) et 0,5 à 70 % en poids d'un polymère (B) entièrement ou partiellement perfluoré ou encore non perfluoré. Les membranes peuvent être utilisées comme piles à combustible.

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