NOVEL METHODS TO IMPROVE THE MEMBRANE PERFORMANCES THROUGH COATING THE HYDROPHILIC POLYMERS ON THE HYDROPHOBIC POLYMERIC MEMBRANE SURFACES FOLLOWED BY THE WET-CROSSLINKING

摘要

PURPOSE: A method for improving hydrophilic property of a hydrophobic polymer and an anion exchange membrane thereby are provided to prevent degradation of hydrophilic property, and to improve hydrophilicity of the hydrophobic polymer. CONSTITUTION: A method for improving hydrophilic property of a hydrophobic polymer includes the following steps: coating the surface of a hydrophobic polymer membrane with hydrophilic polymer selected from a compound selected from PVA(polyvinyl alcohol) and PAAm(polyallylamine hydrochloride) for 30 ~ 60 seconds in liquid in which salt is dissolved; and cross-linking the coated hydrophilic polymer membrane in Glutaric anhydride or Maleic anhydride liquid in 15~90 °C. The hydrophobic polymer is selected from PVDF, PSf, PES, PEI, PI, PE, PP, and PAmide.