| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a porous filtration membrane made of a polyvinylidene fluoride for water treatment which can effectively suppress fouling, which has chemical resistance against medicines such as an alkali and the like being used when fouling occurs and which has a sufficient fouling inhibiting effect after chemical cleaning is repeated.SOLUTION: A method for producing a porous filtration membrane made of a polyvinylidene fluoride for water treatment includes: a step preparing a coagulation liquid dissolved with a copolymer (A) copolymerizing a monomer composition consisting of 5-70 mol% of 2-methacryloyloxyethyl phosphorylcholine, 20-80 mol% of n-butylmethacrylate and 5-50 mol% of glycerol methacrylate and having a weight average molecular weight of 5,000-300,000 at a concentration of 0.01-10 mass%; and a step forming a filtration membrane by bringing a polyvinylidene fluoride membrane-forming stock solution into contact with the coagulation liquid and performing phase separation.SELECTED DRAWING: None |
