Patent ID: 8026339

Claim:
A polysulfone, comprising: a repeating unit represented by Formula 1: where X is selected from the group consisting of a single bond, —CH 2 —, —C(CH 3 ) 2 —, —C(CF 3 ) 2 —, —C(CCl 3 ) 2 —, —C(═O)—, and —O—; each R 1 is independently selected from the group consisting of a primary amino group, a secondary amino group, a tertiary amino group, a quaternary ammonium salt group, a C4-C30 alkyl heteroarylpyridinium salt group, a C4-C30 aryl heteroarylpyridinium salt group, a C4-C30 aralkyl heteroarylpyridinium salt group, and a combination thereof; and R comprises at least one selected from the group consisting of a hydrogen, a C1-C20 alkyl group, a C6-C20 aryl group, a C1-C20 alkoxy group, and a C6-C20 aryloxy group; and a repeating unit represented by Formula 3: R 2 is selected from the group consisting of a C1-C20 alkyl group, a C1-C20 alkoxy group, a C6-C20 aryl group, a C6-C20 aryloxy group, a C7-C20 arylalkyl group, and —CH 2 O(CH 2 CH 2 O) n CH 3 ; n is an integer from 1 to 20; and R comprises at least one selected from the group consisting of a hydrogen, a C1-C20 alkyl group, a C6-C20 aryl group, a C1-C20 alkoxy group, and a C6-C20 aryloxy group, wherein the polysulfone includes: the repeating unit represented by Formula I in the range of 0.6-0.9 mole; the repeating unit represented by Formula 3 in the range of 0.05-0.3 mole; and a degree of polymerization in the range of 20-5000.