Patent ID: 11912803
Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A conjugated polyelectrolyte-grafted membrane comprising:
a membrane; and
a conjugated polyelectrolyte (CPE) crosslinked to a surface of the membrane;
wherein an alkene group (CnH2n) of the conjugated polyelectrolyte (CPE) and an alkene group (CnH2n) of the surface of the membrane form crosslinking through free radical polymerization;
wherein the alkene group (CnH2n) of the conjugated polyelectrolyte (CPE) is 1-vinylimidazole;
wherein the conjugated polyelectrolyte (CPE) is present in the form of coating on the whole surface of the membrane;
wherein the surface of the conjugated polyelectrolyte-grafted membrane has hydrophilicity by a hydroxide ion (OH−) present in a side chain of the conjugated polyelectrolyte (CPE), and the hydroxide ion (OH−) substitutes for a halide ion present in the side chain of the conjugated polyelectrolyte (CPE);
wherein the conjugated polyelectrolyte (CPE) is capable of generating active oxygen in water under visible light irradiation;
wherein the conjugated polyelectrolyte (CPE) has visible light absorbing ability, and has a reduction potential of −0.57V or higher vs. a standard calomel electrode (SCE);
wherein the membrane is applied to separation of contaminants in a water treatment process;
wherein the membrane is a polymeric membrane capable of crosslinking with a conjugated polyelectrolyte (CPE); and
wherein the membrane is a polyvinylidene fluoride-based (PVDF-based) material.