Preparation method of high-flux porous membrane

Abstract

A process for preparing high-pass porous membrane mainly comprising, dissolving polymer (polyethersulfone orpolyacrylonitile) and inorganic additive into suitable organic solvent, mixing the mixture into casting film liquid uniformly after complete dissolution, slobbering the casting film liquid onto the nonwoven fabric supporting body, immersing the nonwoven fabrics with casting film liquid into suitable gel agent, the additive reacting with the gel medium, the membrane liquid on the nonwoven fabrics simultaneously forming porous membrane in the gel bath, and submerging the porous membrane in acid solution. The invention can be applied for obtaining membrane having increased water flux.

Description

technical field

[0001] The invention belongs to the technical field of membrane separation, and in particular relates to a preparation method of a high-flux asymmetric porous membrane. Background technique

[0002] In the last two decades, membrane separation technology has developed rapidly and has been widely used in various fields such as food industry, pharmaceutical industry, sanitation and environmental protection. According to the structure of the membrane, the membrane can be divided into dense membrane and porous membrane. According to the size of the membrane separation object, the membrane can be divided into reverse osmosis membrane, ultrafiltration membrane and microfiltration membrane. Both ultrafiltration membrane and microfiltration membrane are porous membranes. range. The development of porous membranes has played a decisive role in the development of membrane separation technology, but factors such as the price, service life, and cleaning cycle of membran...

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