Bipolar membranes and method

Details Bipolar membranes and method Bipolar membranes and method

C - Chemistry, Metallurgy

01

B

117/183, 117/88.

C01B 7/03 (2006.01) B01J 47/12 (2006.01) C01D 1/04 (2006.01) C08J 5/22 (2006.01)

Patent

CA 1097542

INVENTION: NOVEL BIPOLAR MEMBRANES AND METHOD INVENTORS: FREDERICK P. CHLANDA LESTER T. C. LEE KANG-JEN LIU ABSTRACT OF THE DISCLOSURE Stable bipolar membranes of high permelectivity and low potential drop are prepared using either an anion or cation preformed first layer upon which a second layer or coating of an ion exchange resin of the opposite charge carried in a matrix polymer is applied. The second layer may be suitably applied such as by casting as a slurry of the ion exchange resin in a solution or by laminating a layer comprising a dispersion of the resin in a solid or fused polymer. Optionally, the surface of the first layer may be treated to increase the resin concentration and/or bonding at the interface, such as by sanding, etching, etc.

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