Patent ID: 8710109

Claim:
A membrane or film comprising a mixture of polymers, wherein the mixture comprises: an aromatic ionic polymer comprising an electron withdrawing group selected from the group consisting of a halide, a nitro, and a combination thereof, wherein the electron withdrawing group is present on at least a fraction of the aromatic sites; and an amino aromatic polymer comprising a functional group selected from the group consisting of a halide, a nitro, a sulfonic, a phosphonic, a carboxylic, and a combination thereof, wherein the functional group is present on at least a fraction of the aromatic sites; wherein the aromatic ionic polymer and the amino aromatic polymer are covalently crosslinked via reaction of amino groups to form a bond selected from the group consisting of aryl-aryl (—Ar—Ar—), aryl-ether-aryl (—Ar—O—Ar—), aryl-sulfide-aryl (—Ar—S—Ar—), aryl-sulfone-aryl, and a combination thereof.