PRODUCTION METHOD FOR HYDROPHILIC POLYVINYLIDENE FLUORIDE-BASED RESIN POROUS MEMBRANE

摘要

PROBLEM TO BE SOLVED: To provide a hydrophilic polyvinylidene fluoride-based resin porous membrane which is little in degradation in water permeation performance due to stain.;SOLUTION: This polyvinylidene fluoride-based resin porous membrane is treated with a base and is then treated with an aqueous solution containing hydrogen peroxide or ozone and is further treated with an aqueous solution containing at least one kind of salt selected from perchlorate, perbromate and periodate.;COPYRIGHT: (C)2004,JPO&NCIPI