TY - JOUR
T1 - A novel glue attachment approach for precise anchoring of hydrophilic EGCG to enhance the separation performance and antifouling properties of PVDF membranes
AU - Zhuang, Guo Liang
AU - Wang, Lei Chia
AU - Lin, Yi Chen
AU - Li, Jing Yi
AU - Setnickova, Katerina
AU - Tseng, Hui Hsin
N1 - Financial support from the Ministry of Science and Technology (MOST) in Taiwan (Project numbers: MOST 109-2813-C-005-013-E, and MOST 109-2221-E-005-083-MY3) is gratefully acknowledged.
PY - 2023/5/15
Y1 - 2023/5/15
N2 - 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° to 45.1° 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−2h−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.
AB - 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° to 45.1° 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−2h−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.
KW - Anti-fouling performance
KW - Epigallocatechin gallate
KW - Hydrogen bond
KW - Hydrophilic surface modification
KW - Reclaimed rubber
UR - http://www.scopus.com/inward/record.url?scp=85151024968&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2023.142585
DO - 10.1016/j.cej.2023.142585
M3 - Article
AN - SCOPUS:85151024968
SN - 1385-8947
VL - 464
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 142585
ER -