Preparation method and application of POMs-PEI nanofiltration membrane

The invention discloses a preparation method and application of a POMs-PEI nanofiltration membrane, and belongs to the field of nanofiltration membrane preparation and application. The preparation method of the nanofiltration membrane comprises the following steps: step 1, carrying out first soaking treatment on a PAN membrane in a PMo12 solution to obtain a POMs modified membrane; and step 2, carrying out second soaking treatment on the POMs modified membrane in a PEI solution, and then carrying out third soaking treatment in a glutaraldehyde solution to obtain the POMs-PEI nanofiltration membrane. The problem that the separation efficiency of dye and salt ions is low when a traditional polymer membrane is used for treating industrial printing and dyeing wastewater is solved, the prepared nanofiltration membrane has excellent dye-salt separation performance and chemical stability, the preparation process is simple, and the method is suitable for large-scale industrial production. 本发明公开了一种POMs-PEI纳滤膜的制备方法及应用，