Polyacrylonitrile hydrolyzed modified ultrafiltration membrane resisting protein pollution and preparation method thereof

The invention relates to polyacrylonitrile hydrolyzed modified ultrafiltration membrane resisting protein pollution and preparation method thereof. The polyacrylonitrile hydrolyzed modified ultrafiltration membrane is prepared by hydrolyzing and modifying a polyacrylonitrile based membrane made of by taking polyacrylonitrile and N,N-dimethylformamide as raw materials, wherein the mass ratio of the polyacrylonitrile to the N,N-dimethylformamide is 16:84. The preparation method comprises the steps of: dissolving the polyacrylonitrile in the N,N-dimethylformamide at a temperature of 60 DEG C to prepare a casting membrane solution, defoaming, pouring the casing membrane solution on glass, knifing, placing, putting into a water bath to be solidified into a membrane, soaking with water to obtain a polyacrylonitrile ultrafiltration based membrane, soaking into aqueous alkali with 60 DEG C for 1h, washing to be neutral, soaking a polyacrylonitrile hydrolyzed membrane into an aminoethanol water solution with 60 DEG C again, and taking out the membrane and washing to obtain the polyacrylonitrile hydrolyzed modified ultrafiltration membrane. The invention has simple modification process and more generated active group quantity; and the ultrafiltration membrane prepared by the method has great pollution-resisting capacity for protein molecules.