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Nanofoaming of Polyamide Desalination Membranes To Tune Permeability and Selectivity

Ma, Xiao-Hua, Yao, Zhi-Kan, Yang, Zhe, Guo, Hao, Xu, Zhen-Liang, Tang, Chuyang Y., Elimelech, Menachem·2018·Environmental Science & Technology Letters
DOI 10.1021/acs.estlett.8b00016
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Abstract

Recent studies have documented the existence of discrete voids in the thin polyamide selective layer of composite reverse osmosis membranes. Here we present compelling evidence that these nanovoids are formed by nanosized gas bubbles generated during the interfacial polymerization process. Different strategies were used to enhance or eliminate these nanobubbles in the thin polyamide film layer to tune its morphology and separation properties. Nanobubbles can endow the membrane with a foamed structure within the polyamide rejection layer that is approximately 100 nm in thickness. Simple nanofoaming methods, such as bicarbonate addition and ultrasound application, can result in a remarkable improvement in both membrane water permeability and salt rejection, thus overcoming the long-standing permeability–selectivity trade-off of desalination membranes.

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Metadata

Authors
Ma, X.-H., Yao, Z.-K., Yang, Z., Guo, H., Xu, Z.-L., Tang, C. Y., & Elimelech, M.
Venue
Environmental Science & Technology Letters
Publisher
American Chemical Society (ACS)
Published
2018-02-05
Volume
5
Issue
2
Pages
123-130
ISSN
2328-8930 (ISSN-L)
DOI
10.1021/acs.estlett.8b00016
OpenAlex
W2785951653
Cited by
411
References
0
FWCI
13.47
Type
journal article
Language
en
Open access
closed
Funders
  • Research Grants Council, University Grants Committee (17207514)
  • Ministry of Education of the People's Republic of China (WA1514305)
  • University of Hong Kong
  • China Postdoctoral Science Foundation (2016M601527)
  • Ministry of Human Resources and Social Security (XJ2015015)
  • National Natural Science Foundation of China (21406060)

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CoChat. (2026). Citation check: Nanofoaming of Polyamide Desalination Membranes To Tune Permeability and Selectivity. https://app.cochat.ai/papers/10.1021/acs.estlett.8b00016
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Ma, X.-H., Yao, Z.-K., Yang, Z., Guo, H., Xu, Z.-L., Tang, C. Y., & Elimelech, M. (2018). Nanofoaming of Polyamide Desalination Membranes To Tune Permeability and Selectivity. Environmental Science & Technology Letters. https://doi.org/10.1021/acs.estlett.8b00016

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