| 摘要 |
PURPOSE:To add disinfection property to hollow filament membrane in a filtration module by plating the pore surface of porous hollow filaments by successively running an aq. acid soln. contg. Sn<2+> ion, aq. acid soln. contg. Pd<2+> ion and silver plating soln. through the hollow filaments. CONSTITUTION:In a filtration module which is made by putting porous polyethylene hollow filament membrane, etc., in a housing, and burying and fixing its opening end with urethane resin, etc., a hydrochloric acid soln. of tin (II) chloride is filtered with the module, after the hollow filament membrane in the module is made hydrophilic. The hollow filament membrane is washed with deionized water, and thereafter a hydrochloric acid soln. of palladium chloride is run through the hollow filaments and again the filament membrane is washed with deionized water. Then, the plating soln. contg. silver ion such as silver nitrate, etc., complexing agent such as ethylenediamine, etc., and reducing agent such as potassium sodium tartrate, is run through the hollow filaments. Thereby, an electroless plated hollow filament membrane is obtd.
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