Preparing method of polysulfone membrane using phase inversion

摘要

PURPOSE: A method for manufacturing a polysulfone separating membrane using a phase conversion method is provided to adjust the thickness of a dense layer on the surface of the separating membrane. CONSTITUTION: A method for manufacturing a polysulfone separating membrane using a phase conversion method includes the following: polysulfone is mixed with a solvent and a non-solvent additive to obtain a film forming solution; the film forming solution is applied on the upper side of a substrate to form a film; and the film is immersed in a immersing bath filled with a non-solvent and is solidified. The solvent is n-methyl pyrrolidone, dimethyl acetamide, or dimethyl formamide. The non-solvent additive is carbon tetrachloride or cyclohexane.