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Fabrication of advanced nanofiltration membranes with nanostrand-hybrid morphology mediated by ultrafast Noria-polyethyleneimine co-deposition

Abstract

Polyphenol chemistry-based surface modification has received extensive attention in membrane science for its simplicity and low-cost. However, the limited molecular structures combined with generally time-consuming process have largely restricted their further applications. Herein, we report an ultrafast and universal surface modification strategy based on the co-deposition of a macrocycle polyphenol molecule, Noria, and polyethyleneimine (PEI), for which only several seconds are required to obtain a uniform coating. Meanwhile, nanofiltration membranes are fabricated by traditional interfacial polymerization (IP) with the Noria-PEI co-deposition coating as the interlayer. Interestingly, the host-guest heterogeneous interaction between anchored Noria on support surface and the amine monomers in aqueous phase, would significantly alter IP process and contribute to a unique nanostrand-hybrid morphology for piperazine and trimesoyl chloride-based membranes. Consequently, such novel morphology based nanofiltration membranes exhibit a high permeance up to 28 Lm-2h-1bar-1 while still maintain comparable divalent salt (Na2SO4, MgSO4, MgCl2 and CaCl2) rejections of above 96.0%, which are among the best performance for nanofiltration membranes. Besides the membrane science, this ultrafast surface modification strategy could arouse intense interest in host-guest chemistry at interfaces for fabricating multifunctional materials.

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Publication details

The article was received on 26 Aug 2018, accepted on 08 Oct 2018 and first published on 08 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA08273A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Fabrication of advanced nanofiltration membranes with nanostrand-hybrid morphology mediated by ultrafast Noria-polyethyleneimine co-deposition

    Z. Zhai, C. Jiang, N. Zhao, W. Dong, H. Lan, M. Wang and Q. J. Niu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA08273A

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