Tannic Acid/Fe3+ Nanoscaffold for Interfacial Polymerization : Toward Enhanced Nanofiltration Performance

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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  • Zhe Yang
  • Zhi-Wen Zhou
  • Hao Guo
  • Zhikan Yao
  • Xiao-Hua Ma
  • Xiaoxiao Song
  • Chuyang Y. Tang


Original languageEnglish
Pages (from-to)9341-9349
Journal / PublicationEnvironmental Science and Technology
Issue number16
Publication statusPublished - 21 Aug 2018
Externally publishedYes


Conventional thin-film composite (TFC) membranes suffer from the trade-off relationship between permeability and selectivity, known as the "upper bound". In this work, we report a high performance thin-film composite membrane prepared on a tannic acid (TA)-Fe nanoscaffold (TFCn) to overcome such upper bound. Specifically, a TA-Fe nanoscaffold was first coated onto a polysulfone substrate, followed by performing an interfacial polymerization reaction between trimesoyl chloride (TMC) and piperazine (PIP). The TA-Fe nanoscaffold enhanced the uptake of amine monomers and provided a platform for their controlled release. The smaller surface pore size of the TA-Fe coated substrate further eliminated the intrusion of polyamide into the substrate pores. The resulting membrane TFCn showed a water permeability of 19.6 ± 0.5 L m2- h-1 bar-1, which was an order of magnitude higher than that of control TFC membrane (2.2 ± 0.3 L m-2 h-1 bar-1). The formation of a more order polyamide rejection layer also significantly enhanced salt rejection (e.g., NaCl, MgCl2, Na2SO4, and MgSO4) and divalent to monovalent ion selectivity (e.g., NaCl/MgSO4). Compared to conventional TFC nanofiltration membranes, the novel TFCn membrane successfully overcame the longstanding permeability and selectivity trade-off. The current work paves a new avenue for fabricating high performance TFC membranes.

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Citation Format(s)

Tannic Acid/Fe3+ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance. / Yang, Zhe; Zhou, Zhi-Wen; Guo, Hao et al.
In: Environmental Science and Technology, Vol. 52, No. 16, 21.08.2018, p. 9341-9349.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review