Patent ID: 8505745

Claim:
A membrane for liquid filtration comprising: an amphiphilic graft copolymer having i) a backbone comprising a polyacrylonitrile and ii) a plurality of hydrophilic side chains along the backbone, each of said hydrophilic side chains comprising polyethylene oxide and being provided by one a copolymerized macromonomer having been copolymerized by polymerization of an acrylate group at one chain end of the macromonomer, and the macromonomer having ethylene oxide as a hydrophilic repeat unit, wherein the graft-copolymer is microphase-separated, the hydrophilic side chains are aggregated in nanometer-scale domains interspersed with hydrophobic domains comprising polyacrylonitrile of the backbone, and said amphiphilic graft copolymer adsorbs less than about 20% of protein adsorbed by a corresponding polyacrylonitrile polymer.