PREPARATION METHOD OF ASYMMETRIC MEMBRANE BY USING CHEMICAL GELATION AND ASYMMETRIC MEMBRANE PREPARED THEREBY

摘要

PURPOSE: A preparation method of an asymmetric membrane and the asymmetric membrane are provided, which can prepare asymmetric membrane having excellent mechanical intensity and gas selectivity by using chemical gelation. CONSTITUTION: The preparation method contains the steps of; (i) preparing polymer solution by mixing 15-35 wt% of chemical gelated polymer by ultraviolet rays and 65-85 wt% of solvent that doesn't absorb the light having wavelength of ultraviolet ray; (ii) chemically gelating the polymer solution by irradiating the ultraviolet ray; and (iii) preparing the asymmetric membrane by dipping chemically gelated polymer solution to water as nonsolvent and separating phase.