Modification of polyamide-urethane (PAUt) thin film composite membrane for improving the reverse osmosis performance
In the current study, the poly (amide-urethane) (PAUt) membranes were successfully fabricated by interfacial polymerization of m-phenylenediamine (MPD) and 5-choroformyloxyisophaloyl chloride (CFIC) on the polysulfone substrates. Two modification methods based on layer-by-layer assembly were applied...
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sg-ntu-dr.10356-877552020-09-26T22:00:29Z Modification of polyamide-urethane (PAUt) thin film composite membrane for improving the reverse osmosis performance Liu, Li-Fen Gu, Xing-Ling Qi, Sa-Ren Xie, Xin Li, Rui-Han Li, Ke Yu, Chun-Yang Gao, Cong-Jie Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Reverse Osmosis Poly (amide-urethane) In the current study, the poly (amide-urethane) (PAUt) membranes were successfully fabricated by interfacial polymerization of m-phenylenediamine (MPD) and 5-choroformyloxyisophaloyl chloride (CFIC) on the polysulfone substrates. Two modification methods based on layer-by-layer assembly were applied to modify the PAUt membrane surface to achieve antifouling property: 1. Chitosan (CS) was directly self-assembled on the PAUt membrane (i.e., PAUt-CS); and 2. polydimethyl diallyl ammonium chloride (PDDA), polystyrene sulfonate (PSS), and CS were successively self-assembled on the membrane surface (i.e., PAUt-PDDA/PSS/CS). The resultant membranes were symmetrically characterized by Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR-FTIR), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and Contact Angle Meter (CAM), respectively. The results indicated that the modified membranes had much smoother and more hydrophilic surfaces as compared to the nascent PAUt membrane. Meanwhile, the modified membranes exhibited better reverse osmosis performance in terms of water permeability and salt rejection. After the modified membranes were fouled by lake water, the PAUt-PDDA/PSS/CS membrane presented the best antifouling performance among the three types of membranes. Combining the reverse osmosis performance with the anti-fouling property obviously, the PAUt-PDDA/PSS/CS membrane behaved as a promising candidate to be used in real applications. Published version 2018-08-08T03:37:45Z 2019-12-06T16:48:46Z 2018-08-08T03:37:45Z 2019-12-06T16:48:46Z 2018 Journal Article Liu, L.-F., Gu, X.-L., Qi, S.-R., Xie, X., Li, R.-H., Li, K., et al. (2018). Modification of polyamide-urethane (PAUt) thin film composite membrane for improving the reverse osmosis performance. Polymers, 10(4), 346-. https://hdl.handle.net/10356/87755 http://hdl.handle.net/10220/45542 10.3390/polym10040346 en Polymers © 2018 The Author(s). Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). 13 p. application/pdf |
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Reverse Osmosis Poly (amide-urethane) Liu, Li-Fen Gu, Xing-Ling Qi, Sa-Ren Xie, Xin Li, Rui-Han Li, Ke Yu, Chun-Yang Gao, Cong-Jie Modification of polyamide-urethane (PAUt) thin film composite membrane for improving the reverse osmosis performance |
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In the current study, the poly (amide-urethane) (PAUt) membranes were successfully fabricated by interfacial polymerization of m-phenylenediamine (MPD) and 5-choroformyloxyisophaloyl chloride (CFIC) on the polysulfone substrates. Two modification methods based on layer-by-layer assembly were applied to modify the PAUt membrane surface to achieve antifouling property: 1. Chitosan (CS) was directly self-assembled on the PAUt membrane (i.e., PAUt-CS); and 2. polydimethyl diallyl ammonium chloride (PDDA), polystyrene sulfonate (PSS), and CS were successively self-assembled on the membrane surface (i.e., PAUt-PDDA/PSS/CS). The resultant membranes were symmetrically characterized by Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR-FTIR), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and Contact Angle Meter (CAM), respectively. The results indicated that the modified membranes had much smoother and more hydrophilic surfaces as compared to the nascent PAUt membrane. Meanwhile, the modified membranes exhibited better reverse osmosis performance in terms of water permeability and salt rejection. After the modified membranes were fouled by lake water, the PAUt-PDDA/PSS/CS membrane presented the best antifouling performance among the three types of membranes. Combining the reverse osmosis performance with the anti-fouling property obviously, the PAUt-PDDA/PSS/CS membrane behaved as a promising candidate to be used in real applications. |
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Nanyang Environment and Water Research Institute |
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Nanyang Environment and Water Research Institute Liu, Li-Fen Gu, Xing-Ling Qi, Sa-Ren Xie, Xin Li, Rui-Han Li, Ke Yu, Chun-Yang Gao, Cong-Jie |
format |
Article |
author |
Liu, Li-Fen Gu, Xing-Ling Qi, Sa-Ren Xie, Xin Li, Rui-Han Li, Ke Yu, Chun-Yang Gao, Cong-Jie |
author_sort |
Liu, Li-Fen |
title |
Modification of polyamide-urethane (PAUt) thin film composite membrane for improving the reverse osmosis performance |
title_short |
Modification of polyamide-urethane (PAUt) thin film composite membrane for improving the reverse osmosis performance |
title_full |
Modification of polyamide-urethane (PAUt) thin film composite membrane for improving the reverse osmosis performance |
title_fullStr |
Modification of polyamide-urethane (PAUt) thin film composite membrane for improving the reverse osmosis performance |
title_full_unstemmed |
Modification of polyamide-urethane (PAUt) thin film composite membrane for improving the reverse osmosis performance |
title_sort |
modification of polyamide-urethane (paut) thin film composite membrane for improving the reverse osmosis performance |
publishDate |
2018 |
url |
https://hdl.handle.net/10356/87755 http://hdl.handle.net/10220/45542 |
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1681057989285380096 |