High performance, quality controlled bipolar membrane

Details High performance, quality controlled bipolar membrane High performance, quality controlled bipolar membrane

C - Chemistry, Metallurgy

08

J

18/14

C08J 5/22 (2006.01) B01D 61/44 (2006.01)

Patent

CA 1098664

INVENTION: HIGH PERFORMANCE, QUALITY CONTROLLED BIPOLAR MEMBRANE INVENTORS: LESTER T. C. LEE, GERALD J. DEGE, and KANG-JEN LIU ABSTRACT OF THE DISCLOSURE Improved novel single film bipolar membranes having an ion selectivity above 80% in an electrolyte medium of about one mole, are prepared containing a relatively high amount, i.e. at least 15% of an insoluble cross-linked aromatic polymer. Before the styrenated sheet is chemically functionalized, the film surface is specifically treated, i.e. cleaned to make it more receptive to functional groups, so that the cationic-exchange groups and anion-exchange groups can be introduced homogeneously from each side of the surface-cleaned film, and a single-film bipolar membrane of superior durability, stability, and quality control results.

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