| 摘要 |
PROBLEM TO BE SOLVED: To provide a method capable of manufacturing a composite semipermeable membrane having a high solute removability and a high water permeability without increasing economic load nor wastewater treatment load. SOLUTION: In the method for manufacturing the composite semipermeable membrane, multifunctional amine aqueous solutions having different concentrations are applied to the front and rear surfaces of a fine porous support membrane, and then a multifunctional acid halide solution is applied to the front surface of the fine porous support membrane to form a polyamide separation functional layer on the fine porous support membrane. The concentration of the multifunctional amine aqueous solution applied to the front surface of the fine porous support membrane is lower than that of the multifunctional amine aqueous solution applied to the rear face of the fine porous support membrane. COPYRIGHT: (C)2011,JPO&INPIT |
