Nanoparticle-templated nanofiltration membranes for ultrahigh performance desalination

Zhenyi Wang, Zhangxin Wang, Shihong Lin, Huile Jin, Shoujian Gao, Yuzhang Zhu () and Jian Jin ()
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Zhenyi Wang: Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences
Zhangxin Wang: Vanderbilt University
Shihong Lin: Vanderbilt University
Huile Jin: Wenzhou University Wenzhou
Shoujian Gao: Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences
Yuzhang Zhu: Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences
Jian Jin: Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Nanofiltration (NF) membranes with ultrahigh permeance and high rejection are highly beneficial for efficient desalination and wastewater treatment. Improving water permeance while maintaining the high rejection of state-of-the-art thin film composite (TFC) NF membranes remains a great challenge. Herein, we report the fabrication of a TFC NF membrane with a crumpled polyamide (PA) layer via interfacial polymerization on a single-walled carbon nanotubes/polyether sulfone composite support loaded with nanoparticles as a sacrificial templating material, using metal-organic framework nanoparticles (ZIF-8) as an example. The nanoparticles, which can be removed by water dissolution after interfacial polymerization, facilitate the formation of a rough PA active layer with crumpled nanostructure. The NF membrane obtained thereby exhibits high permeance up to 53.5 l m−2h−1 bar−1 with a rejection above 95% for Na2SO4, yielding an overall desalination performance superior to state-of-the-art NF membranes reported so far. Our work provides a simple avenue to fabricate advanced PA NF membranes with outstanding performance.

Date: 2018
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DOI: 10.1038/s41467-018-04467-3

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