MICRO-POROUS MEMBRANE OF POLYETHERSULFONE AND SULFONATED POLYETHERSULFONE HAVING ENDOTOXIN-ABSORPTIVE POWER

摘要

PURPOSE: To easily and efficiently remove endotoxin by absorption to an extremely low concentration by processing a micro-porous membrane of polyethersulfone and sulfonated polyethersulfone having good fluidity using cationic resins to impart zeta potential to the surface of the membrane. ;CONSTITUTION: Polyethersulfone resin and sulfonated polyethersulfone resin are used to manufacture a micro-porous membrane by a conventinal method. Thereafter the micro-porous membrane of polyethersulfone and sulfonated polyethersulfone is dipped in a solution of cationic resin such as polyamide.epichlorohydrin, which membrane is then drid and heat treated, wherein alkali is added to the solution of polyamide.epichlorohydri resin to provide pH 12-13 thereby effectively performing the treatment. As a result, positive zeta potential is imparted to the surface of the membrane, so that the micro-porous membrane of polyethersulfone and sulfonated polyethersulfone, wherein an endotoxin-absorptive power is held, can be provided.;COPYRIGHT: (C)1995,JPO