| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a composite semi-permeable membrane with little remaining amount of a negative ion surfactant, suppressing an elution amount of the negative ion surfactant from the membrane module to the minimum, even at an initial period of operation of a membrane separation apparatus, causing no malodor nor foaming, and can produce safe drinking water, and a method for manufacturing of the same. Ž<P>SOLUTION: In the method for manufacturing of the composite semi-permeable membrane with the surface of a porous support body coated with a polyamide thin film, the crosslinked polyamide thin film consisting of multifunctional amine and multifunctional acid halide is formed in the presence of the negative ion surfactant on the surface of the porous support body by an in-situ interfacial polymerization method, the thin film is treated by dipping it in an alcohol aqueous solution, then treated with hot water of 50°C or higher or an alkali aqueous solution, thus, the amount of the negative ion surfactant remaining in the composite semi-permeable membrane is lowered 5g or less based on 1 kg of the composite semi-permeable membrane. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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