Method for preparing ultrafiltration film of poly-ether-sulfone and anti-protein-contamination type

The present invention discloses a method for preparing an anti polyethersulfone ultrafiltration membrane protein contamination. Belonging membrane preparation techniques. The method based on the principle of molecular self-assembly, a polyvinyl alcohol cross-linking reaction between the adsorption and the hydrophobic polyvinyl alcohol and borax film surface, of a modified polyethersulfone ultrafiltration membrane. The method is as follows: preparation of a certain concentration of the polyvinyl alcohol and borax solution, blank polyethersulfone ultrafiltration membranes with deionized water cleaning, after dry water, dipped into the polyvinyl alcohol solution removed, after immersion in dry cleaning borax to the solution, and then taken out for cleaning dried, and then immersed in a polyvinyl alcohol solution, and repeating the above steps up to a certain number of cycles, to obtain a polyvinyl alcohol-modified polyethersulfone ultrafiltration membrane. The preparation method is simple, mild conditions, to obtain a modified membrane having a good separation performance and pollution resistance, and can be used in the field of oil separation of biological wastewater treatment.