METHOD FOR PREPARING NANOFILTRATION MEMBRANE AND NANOFILTRATION MEMBRANE PREPARED THEREFROM

摘要

A method for preparing a nanofiltration membrane and a nanofiltration membrane prepared therefrom, the method comprising the following steps: dissolving a polymer in a solvent to prepare a polymer solution, and curing the polymer solution on a support material to form a base membrane; sequentially applying a first liquid-phase solution and a second liquid-phase solution on the base membrane to form a nascent ecological membrane; densifying the nascent ecological membrane by using a solution that contains an alkaline substance; processing the densified nascent ecological membrane by using a solution that contains an acidic substance; and obtaining the nanofiltration membrane after post-processing and drying.