| abstract |
To provide a selectively permeable separation membrane having a good balance of separation characteristics, high safety and stability of performance, and excellent module assemblability, and a method for producing the same. A sieving coefficient of albumin is 15 when bovine blood is flowed at a filtration flow rate of 20 ml / min into a module prepared by loading a selectively permeable separation membrane comprising a polysulfone polymer and polyvinylpyrrolidone. It is a selectively permeable separation membrane which is 0.01 to 0.1 after 2 minutes and 0.005 to 0.04 after 2 hours. Further, the ratio of polyvinyl pyrrolidone to the polysulfone-based polymer in the film-forming solution is 10 to 18% by mass, the internal liquid is an aqueous solution containing 30 to 60% by mass of an amide solvent, and the internal liquid is used as the film-forming solution. A method for producing a selectively permeable separation membrane, which is 30 to 60 ° C. lower than the liquid temperature and discharged at a liquid temperature of 0 to 40 ° C. [Selection figure] None |