POLYSULFONE MEMBRANE AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A polysulfone-based separating membrane and a method for preparing the same are provided to expand the life of the membrane by preventing the reduction of the transmittance of the membrane and improving the water permeability of the membrane. CONSTITUTION: A polysulfone-based separating membrane includes 1-10 weight% of sulfonated polysulfone-based polymer and a polysulfone-based polymer containing polymer solution. The sulfonated polysulfone-based polymer is represented by chemical formula 1. In chemical formula 1, m/(n+m) is between 0.2 and 0.7; and x is between 50 and 1000. The sizes of pores in the polysulfone-based separating membrane are asymmetrically distributed. The polysulfone-based polymer containing polymer solution is one or the mixture of polysulfone, polyethersulfone, and polyallylethersulfone polymer.