A novel glue attachment approach for precise anchoring of hydrophilic EGCG to enhance the separation performance and antifouling properties of PVDF membranes

0571686 - ÚCHP 2024 RIV NL eng J - Journal Article
Zhuang, G. - Wang, L. - Lin, Y. - Li, J. - Setničková, Kateřina - Tseng, H.
A novel glue attachment approach for precise anchoring of hydrophilic EGCG to enhance the separation performance and antifouling properties of PVDF membranes.
Chemical Engineering Journal. Roč. 464, May15 (2023), č. článku 142585. ISSN 1385-8947. E-ISSN 1873-3212
Grant - others:MOST(TW) 1092813C005-013-E; MOST(TW) 109-2221-E-005-083-MY3
Institutional support: RVO:67985858
Keywords : hydrophilic surface modification * reclaimed rubber * epigallocatechin gallate * hydrogen bond
OECD category: Chemical process engineering
Impact factor: 15.1, year: 2022
Method of publishing: Open access with time embargo

A novel glue attachment approach was proposed to form a durable hydration layer on a hydrophobic PVDF hollow fiber membrane (PVDF HFM) surface to improve its hydrophilicity and antifouling ability during wastewater filtration. The functional glue was synthesized from reclaimed styrene butadiene rubber (SBR) and a hydroxyl group was created with an epoxidation reaction (ESBR). The hydrophilic epigallocatechin-s-gallate (EGCG) was then precisely anchored via hydrogen bonding with multiple phenolic hydroxyl groups in the ESBR without penetrating into the inner matrix of the PVDF to prevent flux decline. The hydrophilicity of the PVDF membrane increased drastically and the water contact angle decreased from 62.7 degrees to 45.1 degrees with only a 25% decline in the pure water flux. Furthermore, due to precise anchoring of the EGCG, the modified EGCG-ESBR/PVDF membrane showed a higher pure water flux (110.6 L m(-2) h(-1)) and much higher BSA and oil (kerosene) rejection rates (approximately 94.5% and 99.5%, respectively) compared to membranes directly coated with EGCG (EGCG-PVDF). Moreover, the modified membrane also showed higher water flux recovery after multiple filtration cycles. This promising and efficient hydrophilic modification suggests great potential for application of the eco-friendly material in wastewater treatment.
Permanent Link: https://hdl.handle.net/11104/0342741