THE FABRICATION METHOD OF FILTRATION MEMBRANE COATED WITH METAL NANOPARTICLE USING SUPERCRITICAL FLUID

摘要

PURPOSE: A method for manufacturing a separating membrane coated with metal nano-particles based on supercritical fluid is provided to increase the water permeability of a separating membrane and to reduce the protein absorbent of the separating membrane. CONSTITUTION: A method for manufacturing a separating membrane includes the following: a separating membrane with micro pores is arranged in a high pressure reactor, and a metal precursor, which is capable of being dissolved in supercritical fluid, is introduced into the reactor; the temperature and the pressure of the reactor are maintained with a supercritical condition of supercritical fluid, and the supercritical fluid is introduced into the reactor to prepare a metal precursor dissolved coating solution; the outer surface of the separating membrane and the inner sides of micro pores in the separating membrane are coated with the coating solution; and a reducing agent is introduced into the reactor to reduce the metal precursor into metals to form metal nano-particle coating layers on the outer surface of the separating membrane and the inner sides of the micro pores in the separating membrane.