Cross linking treatment of polymer membranes

摘要

Disclosed is a method of forming a hydrophilic porous polymeric membrane comprising: i) preparing a porous polymeric membrane from a polymer blend which contains poly(vinylidene fluoride) (PVdF) or a PVdF copolymer and a component which is cross-linkable; and ii) treating said porous polymeric membrane to cross-link said crosslinkable component; wherein the component which is cross-linkable is hydrophilic, and wherein the cross-linking treatment is a chemical solution process such that said membrane is first contacted with and absorbs a solution containing crosslinking agent and the resultant loaded membrane is then removed from said solution and heated at the required temperature.