CPC B01D 69/142 (2013.01) [B01D 67/0088 (2013.01); B01D 67/0093 (2013.01); B01D 69/02 (2013.01); B01D 69/141 (2013.01); B01D 69/144 (2013.01); B01D 71/38 (2013.01); B01D 71/40 (2013.01); B01D 71/60 (2013.01); B01D 71/64 (2013.01); B01D 71/82 (2013.01); C08L 73/02 (2013.01); C08L 77/02 (2013.01)] | 20 Claims |
1. A polyacid-coated porous membrane comprising:
(a) a porous membrane substrate comprising a plurality of membrane pores; and
(b) a polyacid layer adsorbed on surfaces of the membrane pores, the polyacid layer comprising a polyacid polymer comprising repeating units comprising a pendent metal-binding ligand comprising one or more free acid groups selected from the group consisting of carboxylic acid groups, carboxylate groups, and combinations thereof;
wherein:
the polyacid layer is stably adsorbed on the surfaces of the membrane pores and is substantially free of covalent attachments to the surfaces of the membrane pores; and
the repeating units are selected from the group consisting of:
(i) repeating units comprising a nitrogen atom (N) present in a backbone portion of the repeating units;
(ii) repeating units comprising (A) an amide group (—C(═O)NH— or —C(═O)NR—) linking the pendent metal binding ligand and the polyacid polymer backbone, and (B) a pendent alkyl or heteroalkyl group on the polyacid polymer backbone at the same location as the amide group; and
(iii) repeating units comprising an oxygen atom (O) present in a backbone portion of the repeating units.
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