Hydrophilic membrane is a kind of ultrafiltration membrane, you can filter some of the harmful substances in water, this membrane can be filtered under a small pressure of water.
Hydrophilic membrane principle: ultrafiltration is a membrane pore size associated with the sieving process to the pressure on both sides of the membrane as the driving force to the hydrophilic membrane as the filter medium, under a certain pressure, when the liquid flow through the surface , The hydrophilic membrane surface of many small pores only allow water and water molecules through the liquid and through the liquid, and the liquid body on the membrane surface microporous material is trapped in the membrane on the liquid side, as a concentration Liquid, thus achieving the purpose of purification, separation and concentration of the stock solution.
Hydrophilic film industry is widely used, has become one of the new chemical unit operation. For the separation, concentration, purification of biological products, pharmaceutical products and food industry; also used for blood treatment, wastewater treatment and ultra-pure water preparation of the terminal treatment device. In our country has been successfully used hydrophilic membrane of Chinese herbal medicine concentrated purification. Hydrophilic membrane with the progress of technology, its screening function will be improved and strengthened, the contribution of human society will be more and more. The structure of the hydrophilic membrane is symmetrical and asymmetric. The former is isotropic, no cortex, all directions of the pores are the same, belonging to the deep filter; the latter has a more dense surface and finger-based structure of the bottom, the surface thickness of 0.01 microns or less, And has a row of ordered micropores, the bottom thickness of 200 to 250 microns, belonging to the surface filtration. Industrial use of hydrophilic film is generally asymmetric membrane. The membrane material of the hydrophilic film is mainly cellulose and its derivatives, polycarbonate, polyvinyl chloride, polyvinylidene fluoride, polysulfone, polyacrylonitrile, polyamide, polysulfone amide, sulfonated polysulfone, Polyvinyl alcohol, modified acrylic polymers, and the like.