초록 ▼

A non-cracking hydrophilic polyether sulfone membrane is prepared by (a) directly coating the entire surface of a hydrophobic polyethersulfone membrane with an aqueous solution of a polyalkylene oxide polymer and at least one polyfunctional monomer, and (b) polymerizing the monomer over the entire s

A non-cracking hydrophilic polyether sulfone membrane is prepared by (a) directly coating the entire surface of a hydrophobic polyethersulfone membrane with an aqueous solution of a polyalkylene oxide polymer and at least one polyfunctional monomer, and (b) polymerizing the monomer over the entire surface of the membrane under conditions which cause the resulting polymer to attach to the polyethersulfone membrane and the polyethylene oxide to form a non-extractable surface which does not crack when the membrane is folded to form a pleated cartridge.

대표청구항 ▼

1. A method for modifying the inner and outer surfaces of a porous polyethersulfone medium comprising the steps of:(a) coating a porous polyethersulfone medium having an average pore size in the range of between about 0.1 and 100 micrometers with a solution containing 0.25-3 wt % of polyalkene oxide

1. A method for modifying the inner and outer surfaces of a porous polyethersulfone medium comprising the steps of:(a) coating a porous polyethersulfone medium having an average pore size in the range of between about 0.1 and 100 micrometers with a solution containing 0.25-3 wt % of polyalkene oxide polymer and 0.1-1 wt % of a monomer having at least two polymerizable vinyl groups which are capable of polymerizing upon exposure to plasma; (b) placing the coated porous medium in plasma processing equipment; and (c) plasma-polymerizing the monomer in-situ to form a modified surface atop the entire porous medium under conditions which avoid any substantial reduction of void volume, wherein the modified porous medium is non-cracking when folded for use as a pleated cartridge filter and has a permanent non-extractable hydrophilic coating.