Ceramic go/pei nanomembrane by layer-by-layer assembly based on covalent bond using edc chemistry and method for manufacturing the same
AssigneeEwha University-Industry Collaboration Foundation
InventorsChanhyuk Park, Minju Lee, So-Youn Kim, Min-Ju Cha, Hee-Jin Kook
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Abstract
The present disclosure relates to a ceramic graphene oxide nanofiltration membrane which is high in mechanical stability while having ion removal ability by alternately stacking GO and PEI on a ceramic nanomembrane by allowing a carboxyl group (—COOH) and an amine group (—NH2) to form a covalent bond in the presence of N-ethyl-N′-[3-(dimethylamino)propyl]carbodiimide hydrochloride (EDC), thereby forming an amide group (—CONH), and a method for manufacturing the same.
Claims10
A ceramic nanofiltration membrane characterized in that graphene oxide (GO) and polyethyleneimine (PEI) are alternately coated on the surface of the ceramic nanofiltration membrane, and the GO and the PEI allow a carboxyl group (—COOH) and an amine group (—NH2) to form a covalent bond, thereby forming an amide group (—CONH).
A method for manufacturing a ceramic nanofiltration membrane, comprising:
- a step 1 of immersing a ceramic membrane in a PEI solution to adsorb PEI on the surface of the ceramic membrane;
- a step 2 of heating the PEI-adsorbed ceramic membrane to immobilize PEI;
- a step 3 of 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;
- a step 4 of 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
- a step 5 of repeating the steps 3 and 4 to laminate a GO/PEI multilayer thin film on the ceramic membrane.
Dependencies are inferred from the claim text.