Homoporous membrane for water treatment

Abstract

The invention provides a homoporous membrane for water treatment, and relates to the field of high polymer materials. The homoporous comprises the following raw materials in parts by weight: 30-70 parts of an ethylene-vinyl alcohol copolymer, 20-60 parts of a hydrophilic organic nano material, 10-20 parts of a sodium hydroxide aqueous solution, 10-20 parts of a silica gel elastic cured material, 14-25 parts of silicone rubber, 5-10 parts of a diluent, 2-5 parts of an additive, 10-20 parts of phenol, 20-30 parts of a formaldehyde solution, 1-14 parts of a cross-linking agent, 2-10 parts of a catalyst, 20-30 parts of dimethylformamide and 10-18 parts of ethanol. According to the invention, through a polymer membrane of a nano material prepared from a hydrophilic organic nano material, an ethylene-vinyl alcohol copolymer, a silica gel elastic cured material, silicone rubber and an organic solvent, a membrane with a uniform pore size structure can be obtained, the pore shape and the pore diameter of the membrane can be adjusted, the membrane has the characteristics of high strength, uniform pore diameter distribution, high porosity and the like, and the problems that an existing nanofiltration membrane is prone to adsorption pollution and membrane holes are not uniform are solved.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a homoporous membrane for water treatment. Background technique [0002] In recent years, membrane separation technology has developed rapidly in the field of material separation and purification by virtue of its advantages of energy saving, high efficiency and environmental protection. Among them, nanofiltration, as a new type of pressure-driven membrane separation process, has become a hot spot in membrane separation technology research. , the pore size and molecular weight cut-off of the nanofiltration membrane are between the reverse osmosis membrane and the ultrafiltration membrane, and the separation of substances is mainly realized by pore size sieving and electrostatic repulsion. 200 organic matter has a high rejection rate, while the rejection rate of monovalent salt ions and low molecular weight organic matter is very low, so that the selective separation of substances ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a uniformly porous membrane for water treatment, which solves the problem that the existing nanofiltration membrane is easy to adsorb pollution and the membrane pores are not uniform