Self-assembly method of inorganic nano particle hybridization organic membrane

Abstract

The invention relates to a self-assembly method of inorganic nano particle hybridization organic membrane. The method comprises steps of: respectively dissolving polycation and polyanion in a dissolvent, preparing to form a membrane casting solution, standing and defoaming; adding inorganic nano particle into a polyanion solution to prepare a polymer nano particle solution; soaking or dynamically filtering polyanion nano particle solution or polycation solution on the surface of a substrate or basal membrane for 10 to 60 minutes to form a thin membrane layer. The substrate or the basal membrane is soaked or dynamically filtered in the polycation solution or polyanion nano particle solution for 10 to 60 minutes; the polyanion nano particle solution reacts with the polycation to form the thin membrane layer; the substrate or the basal membrane is soaked in deionized water, and the membrane surface is rinsed and dried. When the polycation or the polyanion nano particle solution is filtered on the basal membrane, the transmembrane differential pressure thereof is 0.01 to 0.3MPa or minus 0.02 to minus 0.09MPa. The membrane forming method is simple; the thin membrane prepared on the substrate is compact and uniform; the membrane formed on the basal membrane has excellent penetration and vaporization separating property and mechanical strength.

Description

technical field [0001] The invention relates to the preparation of organic-inorganic hybrid membranes, in particular to the preparation of inorganic nanoparticle hybrid organic thin films and inorganic nanoparticle hybrid organic pervaporation membranes. Background technique [0002] Membrane separation technology has the characteristics of high separation efficiency, low energy consumption, simple operation, and no secondary pollution. It has received more and more attention in recent years and has formed a considerable industrial scale. From the perspective of the development process of membrane separation technology, although the earliest developed organic membrane has the advantages of good flexibility and film-forming performance, high selectivity, many varieties, simple preparation process, and mature process, its thermal stability , Mechanical strength and resistance to organic solvents need to be further improved. Compared with organic membranes, inorganic membranes...

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Problems solved by technology

However, at present, there is no relevant report on the self-assembly method of hybrid inorganic nanoparticles in the process of preparing organic membranes.

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