US 11,912,803 B2
Conjugated polyelectrolyte-grafted membrane and method for manufacturing the same
Jee Hye Byun, Seoul (KR); Eunhoo Jeong, Seoul (KR); and Seok Won Hong, Seoul (KR)
Assigned to KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY, Seoul (KR)
Filed by KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY, Seoul (KR)
Filed on Nov. 24, 2020, as Appl. No. 17/103,381.
Claims priority of application No. 10-2020-0145251 (KR), filed on Nov. 3, 2020.
Prior Publication US 2022/0135722 A1, May 5, 2022
Int. Cl. C08F 259/08 (2006.01); B01D 71/34 (2006.01); B01D 69/12 (2006.01); B01D 67/00 (2006.01); B01D 65/08 (2006.01); C02F 1/44 (2023.01); C08J 5/22 (2006.01); C02F 101/30 (2006.01); C02F 101/20 (2006.01)
CPC C08F 259/08 (2013.01) [B01D 65/08 (2013.01); B01D 67/0095 (2013.01); B01D 67/00931 (2022.08); B01D 69/125 (2013.01); B01D 71/34 (2013.01); C02F 1/44 (2013.01); C08J 5/2293 (2013.01); B01D 2321/168 (2013.01); B01D 2323/30 (2013.01); B01D 2323/36 (2013.01); C02F 2101/20 (2013.01); C02F 2101/308 (2013.01); C02F 2303/04 (2013.01); C02F 2303/20 (2013.01); C08J 2351/00 (2013.01)] 9 Claims
OG exemplary drawing
 
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.