Piezoelectric reverse osmosis (RO) membrane: fabrication and anti-fouling effect

In this study, a novel piezoelectric RO membrane with vibrating mechanism when exposed to an electric field was developed. The vibration due to the piezoelectric effect can disturb the concentration polarization layer on the membrane surface and minimize membrane fouling. Polyvinylidene fluoride (PV...

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Main Authors: Fu, Jia Shen, Sim, Lee Nuang, Su, Yu Ping, Chong, Tzyy Haur
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2024
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Online Access:https://hdl.handle.net/10356/178007
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1780072024-06-04T01:52:40Z Piezoelectric reverse osmosis (RO) membrane: fabrication and anti-fouling effect Fu, Jia Shen Sim, Lee Nuang Su, Yu Ping Chong, Tzyy Haur School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Engineering Piezoelectric effect Polyvinylidene fluoride In this study, a novel piezoelectric RO membrane with vibrating mechanism when exposed to an electric field was developed. The vibration due to the piezoelectric effect can disturb the concentration polarization layer on the membrane surface and minimize membrane fouling. Polyvinylidene fluoride (PVDF) which has piezoelectric properties was selected as the porous substrate for a thin film composite (TFC) polyamide RO membrane in this study. Electrical poling was performed to enhance the piezoelectric properties of the PVDF substrate. RO membranes fabricated via interfacial polymerization using different PVDF substrates (i.e., with and without pre-wetting the PVDF substrate, with and without polyethylene terephthalate (PET) non-woven fabric support (denoted as NWF and no-NWF, respectively), with and without electrical poling) were systematically investigated. The results indicated that RO membrane fabricated on poled PVDF-NWF substrate shows reasonable pure water permeability of ∼2 LMH/bar and sodium chloride (NaCl, 2000 ppm) rejection of ∼98.9 % when tested at 15 bar. In the accelerated fouling study using colloidal silica particles (∼20 nm in diameter, 200 ppm with background of 2000 mg/L NaCl), when the RO membrane fabricated using both unpoled and poled PVDF-NWF substrates were excited with AC signal, membrane fouling was significantly reduced. These findings suggested that electrical poling may not be necessary for such piezoelectric RO membrane. National Research Foundation (NRF) Public Utilities Board (PUB) This research is supported by the National Research Foundation, Singapore, and PUB, Singapore’s National Water Agency under its RIE2025 Urban Solutions and Sustainability (USS) (Water) Centre of Excellence (CoE) Programme which provides funding to the Nanyang Environment & Water Research Institute (NEWRI) of the Nanyang Technological University, Singapore (NTU). Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not reflect the views of National Research Foundation, Singapore and PUB, Singapore’s National Water Agency. 2024-06-04T01:52:40Z 2024-06-04T01:52:40Z 2024 Journal Article Fu, J. S., Sim, L. N., Su, Y. P. & Chong, T. H. (2024). Piezoelectric reverse osmosis (RO) membrane: fabrication and anti-fouling effect. Journal of Membrane Science, 695, 122458-. https://dx.doi.org/10.1016/j.memsci.2024.122458 0376-7388 https://hdl.handle.net/10356/178007 10.1016/j.memsci.2024.122458 2-s2.0-85184075799 695 122458 en Journal of Membrane Science © 2024 Elsevier B.V. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Piezoelectric effect
Polyvinylidene fluoride
spellingShingle Engineering
Piezoelectric effect
Polyvinylidene fluoride
Fu, Jia Shen
Sim, Lee Nuang
Su, Yu Ping
Chong, Tzyy Haur
Piezoelectric reverse osmosis (RO) membrane: fabrication and anti-fouling effect
description In this study, a novel piezoelectric RO membrane with vibrating mechanism when exposed to an electric field was developed. The vibration due to the piezoelectric effect can disturb the concentration polarization layer on the membrane surface and minimize membrane fouling. Polyvinylidene fluoride (PVDF) which has piezoelectric properties was selected as the porous substrate for a thin film composite (TFC) polyamide RO membrane in this study. Electrical poling was performed to enhance the piezoelectric properties of the PVDF substrate. RO membranes fabricated via interfacial polymerization using different PVDF substrates (i.e., with and without pre-wetting the PVDF substrate, with and without polyethylene terephthalate (PET) non-woven fabric support (denoted as NWF and no-NWF, respectively), with and without electrical poling) were systematically investigated. The results indicated that RO membrane fabricated on poled PVDF-NWF substrate shows reasonable pure water permeability of ∼2 LMH/bar and sodium chloride (NaCl, 2000 ppm) rejection of ∼98.9 % when tested at 15 bar. In the accelerated fouling study using colloidal silica particles (∼20 nm in diameter, 200 ppm with background of 2000 mg/L NaCl), when the RO membrane fabricated using both unpoled and poled PVDF-NWF substrates were excited with AC signal, membrane fouling was significantly reduced. These findings suggested that electrical poling may not be necessary for such piezoelectric RO membrane.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Fu, Jia Shen
Sim, Lee Nuang
Su, Yu Ping
Chong, Tzyy Haur
format Article
author Fu, Jia Shen
Sim, Lee Nuang
Su, Yu Ping
Chong, Tzyy Haur
author_sort Fu, Jia Shen
title Piezoelectric reverse osmosis (RO) membrane: fabrication and anti-fouling effect
title_short Piezoelectric reverse osmosis (RO) membrane: fabrication and anti-fouling effect
title_full Piezoelectric reverse osmosis (RO) membrane: fabrication and anti-fouling effect
title_fullStr Piezoelectric reverse osmosis (RO) membrane: fabrication and anti-fouling effect
title_full_unstemmed Piezoelectric reverse osmosis (RO) membrane: fabrication and anti-fouling effect
title_sort piezoelectric reverse osmosis (ro) membrane: fabrication and anti-fouling effect
publishDate 2024
url https://hdl.handle.net/10356/178007
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