Permanent hydrophilic porous coatings and methods of making them using electron beam

摘要

A membrane includes a porous base membrane and a hydrophilic coating. The coating comprises a hydrophilic additive and a hydrophilic polymer derivatized with an electron beam reactive group adapted to form a radical under high energy irradiation. Under high energy radiation the electron beam reactive group is covalently grafted to the porous membrane.
One embodiment comprises PTFE as porous membrane, polyvinyl alcohol as hydrophilic polymer and methacrylate as electron beam reactive group. Also disclosed are processes for forming the membrane.