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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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. |
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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 |
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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. |
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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 |
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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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1806059888990748672 |