Zwitterionic metal-organic frameworks modified polyamide membranes with enhanced water flux and antifouling capacity.

Chongbin Wang, Hongchao Wang, Yongsheng Li, Yuanyuan Feng, Zhong Qiu Liu, Tian Sheng Zhao, Li Cao

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Antifouling properties are considered to be crucial parameter to polyamide (PA) composite nanofiltration (NF) membranes for practical applications. In this study, an antifouling material, surface zwitterionization of Metal-organic frameworks (Z-MIL-101 (Cr)) was firstly prepared by decorating zwitterionic polymer onto the MOFs surface. Subsequently, a novel type of MOFs-based hybrid membranes were fabricated via mixing the Z-MIL-101 (Cr) nanoparticle with the organic matrix by interfacial polymerization technique. The most optimal hybrid membrane had a high water permeation of 26 L m-2 h-1 bar-1, which was 2.1 times higher than that pristine PA membrane, while the retention for Na2SO4 was still kept at a considerably high value of 93%. The significant increased water flue can attribute to the existence of water channels generated by the Z-MIL-101 (Cr). More important, the antifouling property of the hybrid membrane was much better than that pristine PA, which was due to the formation of superhydrophilic liquid layer surrounding the zwitterionic groups. The combination of the micropore structure of the MOFs and the excellent antifouling properties of the decorated zwitterionic polymer effectively improved separation performances and antifouling ability, which makes these hybrid membranes promising for water purification.
Original languageEnglish (US)
Pages (from-to)136684
StatePublished - Oct 4 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-10-07
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) and Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (Grant No. 2021-K09).

ASJC Scopus subject areas

  • Environmental Chemistry
  • General Chemistry


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