Preparation method of inorganic/organic hybridization antibacterial film

Abstract

The invention relates to a preparation method of an inorganic / organic hybridization antibacterial film. The preparation method mainly comprises the steps of: (1) preparing a nano-silver-loaded molecular sieve germicide with stronger stability by ion exchange and a chemical reduction method; and preparing a molecular sieve / polymer hybridization antibacterial film loaded with nano-silver particles by a phase transformation film preparation process; and (2) taking N,N-dimethylformamide as a solvent and a reducing agent simultaneously, reducing silver ions to nano-silver serving as an antibacterial function body in a film casting liquid system in situ, and firmly loading the nano-silver in a polymer porous matrix material by a dispersion action and a coupling action of a coupling agent so as to form a nano-silver-loaded polymer porous film. The hybridization antibacterial film, provided by the invention, keeps excellent water flux, high retention rate and tough mechanical intensity, and has excellent antibacterial function, and can effectively solve the problems of loss of the silver ions of the silver-ion-loaded molecular sieve in the membrane filtration, loss of the nanometer inorganic particles in the polymer porous matrix, easy pollution of a separation film by microorganisms, and the like.

Description

technical field

[0001] The invention relates to the preparation of a novel hybrid antibacterial separation membrane, which is different from ordinary organic material separation membranes. It has an antibacterial function and can play the role of antimicrobial erosion, filtration, separation and water purification, and can be widely used in water purification. , sewage treatment and other fields. Background technique

[0002] As a new type of high-efficiency fine filtration technology, membrane filtration has the advantages of no phase change, mild operating conditions, no introduction of third components, simple process flow, etc. It can replace traditional separation technologies such as rectification, evaporation, extraction, crystallization and other processes, so it has attracted widespread attention as a high-tech separation technology [see: Liu Mo'e et al. Membrane Separation Technology [M]. Beijing: Chemical Industry Press, 2000; Shi Jun, Yuan Quan, Gao Congxie. Memb...