▎ 摘　　要

NOVELTY - Ceramic nanofiltration membrane comprises graphene oxide (GO) and polyethyleneimine (PEI) are alternately coated on the surface of the ceramic nanofiltration membrane. The GO and the PEI allow a carboxyl group (-COOH) and an amine group (-NH2) to form a covalent bond, to form an amide group (-CONH). USE - Ceramic nanofiltration membrane. ADVANTAGE - The ceramic nanofiltration membrane has high in mechanical stability while having ion removal ability by alternately stacking GO and PEI on a ceramic nanofiltration membrane. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for manufacturing a ceramic nanofiltration membrane, which involves: (a) immersing a ceramic membrane in a PEI solution to adsorb PEI on the surface of the ceramic membrane; (b) heating the PEI-adsorbed ceramic membrane to immobilize PEI; (c) adding an EDC solution to a GO solution and immersing the PEI-immobilized ceramic membrane in the GO solution so that a carboxyl group of GO and an amine group of PEI are covalently bonded in the presence of EDC to form an amide group; (d) adding the EDC solution to the PEI solution and immersing the ceramic membrane therein so that the carboxyl group of GO and the amine group of PEI are covalently bonded in the presence of EDC to form the amide group, and repeating above steps to laminate a GO/PEI multilayer thin film on the ceramic membrane.