| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite semipermeable membrane which simultaneously satisfies both of separation film performance (solute removability and water permeability) controlled at a high level.SOLUTION: This composite semipeabeable membrane includes a porous support film and an alternate adsorption film. In addition, the composite semipermeable membrane is formed by a process A to form the alternate adsorption film by making a polymer with a positive charge and a polymer with a negative charge alternately adsorbed on the surface of the porous support film, and a process B to bring an aqueous sodium chloride solution into contact with the obtained alternate adsorption film. |
