POLYSULFONE HOLLOW FIBER MEMBRANE HAVING SUPERIOR PERFORMANCE AND METHOD FOR MANUFACTURING THE SAME

摘要

PURPOSE: A polysulfone hollow fiber membrane is provided which has superior solute removing performance (resolving power) by solving problems such as low penetrating power, insufficient hydrophilicity of the surface of a membrane, additional installation of facility and waste of expensive polyvinylpyrrolidone. CONSTITUTION: The asymmetric polysulfone hollow fiber membrane in which hole diameters and thin skin layers is formed on the internal or external surface, the polysulfone hollow fiber membrane having superior performance is characterized in that hole diameters formed on the internal or external surface have an oval appearance in which an average ratio (R) of maximum diameter (a)/minimum diameter (b) is 1.5 or more as a whole. The method for manufacturing the polysulfone hollow fiber membrane having superior performance comprises the processes of spinning a spinning dope having a viscosity of 7000 centipoise (cps) and an internal coagulating solution which consists of polysulfone polymer, hydrophilic polymer and organic solvents with a dual pipe type nozzle; passing the spun hollow fiber through the air gap and into an external coagulating vat having a temperature of 30 deg.C or more; and washing, drying and winding the hollow fiber respectively.