TY - JOUR
T1 - Preparation of chlorine-resistant and regenerable antifouling nanofiltration membrane through interfacial polymerization using beta cyclodextrin monomers.
AU - Wang, Chongbin
AU - Wang, Hongchao
AU - Li, Yongsheng
AU - Feng, Yuanyuan
AU - Zhang, Kun
AU - Fan, Sijie
AU - Cao, Li
N1 - KAUST Repository Item: Exported on 2022-12-06
Acknowledgements: The research was financially supported by the National Natural Science Foundation of China (21908130 and 22072070), the Natural Science Foundation of Shandong Province (ZR2019MB036).
PY - 2022/11/30
Y1 - 2022/11/30
N2 - Constructing membrane with good chlorine resistance and antifouling properties is considered to be important challenges confronting membrane applications. In this study, a composite nanofiltration (NF) membrane (β-CDx/y/PES) was prepared by interfacial polymerization using beta cyclodextrin (β-CD) monomers. Subsequently, the β-CD-based (AZ-β-CDx/y/PES) membrane was prepared by assembling azobenzene labeled zwitterions into the hydrophobic internal cavity of β-CD via host-guest interaction. The optimized membrane exhibited slight change in water flux and rejection under chlorine environment. The AZ-β-CDx/y/PES membrane also displayed an evidently lower loss in water flux in the antifouling test in comparison with the β-CDx/y/PES membrane. More interestingly, the trans azo groups in azobenzene labeled zwitterions can turn into the cis isomers as the visible light irradiation converted to the UV light irradiation, breaking the interaction between azobenzene labeled zwitterions and β-CD. Hence, the contaminants upon the membrane surface can be simply eliminated by water washing under UV light irradiation. The antifouling membrane can be regenerated via immersing the reacquired β-CD2/10/PES membrane into fresh azobenzene labeled zwitterions solution again.
AB - Constructing membrane with good chlorine resistance and antifouling properties is considered to be important challenges confronting membrane applications. In this study, a composite nanofiltration (NF) membrane (β-CDx/y/PES) was prepared by interfacial polymerization using beta cyclodextrin (β-CD) monomers. Subsequently, the β-CD-based (AZ-β-CDx/y/PES) membrane was prepared by assembling azobenzene labeled zwitterions into the hydrophobic internal cavity of β-CD via host-guest interaction. The optimized membrane exhibited slight change in water flux and rejection under chlorine environment. The AZ-β-CDx/y/PES membrane also displayed an evidently lower loss in water flux in the antifouling test in comparison with the β-CDx/y/PES membrane. More interestingly, the trans azo groups in azobenzene labeled zwitterions can turn into the cis isomers as the visible light irradiation converted to the UV light irradiation, breaking the interaction between azobenzene labeled zwitterions and β-CD. Hence, the contaminants upon the membrane surface can be simply eliminated by water washing under UV light irradiation. The antifouling membrane can be regenerated via immersing the reacquired β-CD2/10/PES membrane into fresh azobenzene labeled zwitterions solution again.
UR - http://hdl.handle.net/10754/686164
UR - https://linkinghub.elsevier.com/retrieve/pii/S0045653522039169
U2 - 10.1016/j.chemosphere.2022.137423
DO - 10.1016/j.chemosphere.2022.137423
M3 - Article
C2 - 36460156
SN - 0045-6535
VL - 313
SP - 137423
JO - Chemosphere
JF - Chemosphere
ER -