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US 9,309,367 B2Granted
Membranes comprising cellulosic material and hydrophilic block copolymer (V)
AssigneePall Corporation
InventorsLixiang Xiao, Hassan Ait-Haddou, Frank Onyemauwa
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Abstract
Disclosed is a porous membrane comprising a cellulosic material and a copolymer of the formula: A-B-A (I) or A-B (II), wherein block A, for example, polyglycerol, a polymer of allyl glycidyl ether, or a copolymer of glycidol and allyl glycidyl ether, or a polymer of allyl glycidyl ether or a copolymer of glycidol and allyl glycidyl ether wherein one or more allyl groups having been replaced by hydrophilic groups. Also disclosed is a method for preparing such a membrane.
Claims15
A porous membrane comprising a cellulosic material and a block copolymer of the formula:
- A-B-A (I) or A-B (II),
- wherein block A is:
- (v) a copolymer of glycidol and allyl glycidyl ether, wherein one or more of the allyl groups of the copolymer have been replaced with a group of the formula:
- —(CH2)a—S—(CH2)b—X, wherein a is 3 and b is 1 to 3, and X is selected from an acidic group, a basic group, a cation, an anion, a zwitterion, halo, hydroxyl, acyl, acyloxy, alkylthio, alkoxy, aldehydo, amido, carbamoyl, ureido, cyano, nitro, epoxy, a group of the formula —C(H)(COOH)(NH2), and a group of the formula —C(H)(COOH)(NHAc), or a salt thereof;
- and
- block B is an aromatic hydrophobic polymeric segment.
3 more elements
Dependencies are inferred from the claim text.