Preparation of antibacterial nano filter membrance
A nanofiltration membrane and antibacterial technology, which is applied in the field of preparation of antibacterial nanofiltration membranes, can solve the problems of complex preparation process, and achieve the effects of simple process, excellent performance and excellent antibacterial performance.
Inactive Publication Date: 2008-11-05
SHANGHAI UNIV
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Abstract
The invention relates to a method for preparing an antibacterial nanofiltration membrane, in particular to a method for preparing an antibacterial nanofiltration membrane by adopting a complex containing silver polyelectrolyte and utilizing a layer upon layer electrostatic self-assembly technique, which pertains to the technical field of filtration and separation. The preparation method of the antibacterial nanofiltration membrane is characterized in that: the antibacterial silver containing nanofiltration membrane is prepared first by alternate deposition of a silver containing polycation solution on the surface of a basement membrane and then by in situ reduction of a reducing agent; the preparation process comprises the steps of: (1) the preprocessing of the polysulfone ultrafiltration membrane of the basement membrane; (2) the generation of the primary lamella of polyelectrolyte on the surface of the basement membrane; (3) the preparation of an antibacterial superfine separation layer. The fine membrane is immersed into the silver containing polycation solution, namely the poly allylamine hydrochloride-silver chloride solution, for 5 to 30 minutes for several times and then immersed into a reducing agent NaBH4 solution for 2 to 24 hours and at last the antibacterial nanofiltration membrane is obtained. The nanofiltration membrane has restraining and sterilizing bacteria functions towards microorganism in water and the antibacterial rate reaches more than 99.5 percent.
Application Domain
Semi-permeable membranes
Technology Topic
UltrafiltrationSelf-assembly +10
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