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US 8,710,109 B2Granted
Chemically resistant membranes, coatings and films and methods for their preparation
AssigneeBen-Gurion University of the Negev Research and Development Authority
InventorsCharles Linder, Ora Kedem, Yoram Oren
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Abstract
There is provided herein a membrane or film comprising one or more aromatic ionomers covalently crosslinked through aryl-aryl (—Ar—Ar—), aryl-ether-aryl (—Ar—O—Ar—), aryl-sulfide-aryl (—Ar—S—Ar—), aryl-sulfone-aryl bonds, or any combination thereof, wherein said one or more aromatic ionomers further comprises at least one electron withdrawing group adapted to improve oxidant resistance of said membrane or film.
Claims20
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.
1 more element
A process for the preparation of a membrane or film comprising:
- covalently crosslinking:
- 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 crosslinking via reaction of amino groups reduces the amino group concentration and forms 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.
3 more elements
Dependencies are inferred from the claim text.