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DC Field | Value | Language |
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dc.contributor.author | Lim, Yu Jie | en_US |
dc.contributor.author | Goh, Kunli | en_US |
dc.contributor.author | Lai, Gwo Sung | en_US |
dc.contributor.author | Zhao, Yali | en_US |
dc.contributor.author | Torres, Jaume | en_US |
dc.contributor.author | Wang, Rong | en_US |
dc.date.accessioned | 2022-04-28T06:54:16Z | - |
dc.date.available | 2022-04-28T06:54:16Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Lim, Y. J., Goh, K., Lai, G. S., Zhao, Y., Torres, J. & Wang, R. (2021). Unraveling the role of support membrane chemistry and pore properties on the formation of thin-film composite polyamide membranes. Journal of Membrane Science, 640, 119805-. https://dx.doi.org/10.1016/j.memsci.2021.119805 | en_US |
dc.identifier.issn | 0376-7388 | en_US |
dc.identifier.uri | https://hdl.handle.net/10356/156974 | - |
dc.description.abstract | Nanoscale characteristics of the polyamide layer are key towards the high desalination performance of thin-film composite reverse osmosis (TFC-RO) membranes. Further advancements in the performance of TFC membranes necessitate a comprehensive understanding of the desired polyamide characteristics and its formation mechanisms. Empirical evidence has shown that the properties of the support layer is as equally important as the interfacial polymerization (IP) conditions in the fabrication of high permselectivity TFC membranes for desalination. Herein, we discuss the properties of polyamide layers formed using identical IP conditions over support membranes of different polymers and chemistries (polyethersulfone, polyetherimide and polysulfone) under fairly similar surface pore properties. The characteristics of the polyamide layers formed thereon displayed different physicochemical properties. It is postulated that the support membrane chemistry actually affects the IP reaction and polyamide formation by controlling the amine diffusion speed as well as the breadth of the IP reaction zone (i.e., the region between the interface and the furthest point in which the reaction occurs). Transmission electron microscopy analyses further revealed the nanoscale differences in the polyamide layer (heights ranging from 50 to 200 nm), including intrinsic thickness of basal layer (~10–35 nm) and leaf-like top layer (~20–85 nm), as well as the presence of nanovoids. Finally, we propose a conceptual model to underline the role of support membrane chemistry in the IP reaction, and consequently the formation mechanism of the nanoscale polyamide features. The mechanistic insights from this study are expected to provide more understanding towards a better control over the fabrication of polyamide layers for TFC membranes. The findings in this work are also expected to facilitate tailoring polyamide layers for specific osmotically driven processes. | en_US |
dc.description.sponsorship | Economic Development Board (EDB) | en_US |
dc.description.sponsorship | National Research Foundation (NRF) | en_US |
dc.language.iso | en | en_US |
dc.relation | PUB-1801-0010 | en_US |
dc.relation.ispartof | Journal of Membrane Science | en_US |
dc.rights | © 2021 Elsevier B.V. All rights reserved. This paper was published in Journal of Membrane Science and is made available with permission of Elsevier B.V. | en_US |
dc.subject | Engineering::Civil engineering | en_US |
dc.title | Unraveling the role of support membrane chemistry and pore properties on the formation of thin-film composite polyamide membranes | en_US |
dc.type | Journal Article | en |
dc.contributor.school | School of Civil and Environmental Engineering | en_US |
dc.contributor.school | Interdisciplinary Graduate School (IGS) | en_US |
dc.contributor.school | School of Biological Sciences | en_US |
dc.contributor.research | Nanyang Environment and Water Research Institute | en_US |
dc.contributor.research | Singapore Membrane Technology Centre | en_US |
dc.identifier.doi | 10.1016/j.memsci.2021.119805 | - |
dc.description.version | Submitted/Accepted version | en_US |
dc.identifier.scopus | 2-s2.0-85113871319 | - |
dc.identifier.volume | 640 | en_US |
dc.identifier.spage | 119805 | en_US |
dc.subject.keywords | Thin-Film Composite Membrane | en_US |
dc.subject.keywords | Support Membrane Chemistry | en_US |
dc.description.acknowledgement | This research grant was supported by the Singapore National Research Foundation under its Urban Solutions & Sustainability Program and administered by PUB, Singapore’s National Water Agency (grant number: PUB-1801-0010). The Singapore Membrane Technology Center, Nanyang Environment and Water Research Institute, Nanyang Technological University is grateful for the funding support from the Economic Development Board of Singapore. | en_US |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
Appears in Collections: | CEE Journal Articles IGS Journal Articles NEWRI Journal Articles SBS Journal Articles |
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File | Description | Size | Format | |
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Unraveling the role of support membrane chemistry and pore properties on the formation of thin-film composite polyamide membranes.pdf | 2.14 MB | Adobe PDF | View/Open |
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