High-performance reverse osmosis membranes fabricated on highly porous microstructured supports
Increasing the surface porosity of a support membrane has been proposed as an effective way to improve the water permeability of thin-film composite (TFC) reverse osmosis (RO) membranes by reducing the diffusion pathway in the active layer. In this work, we prepared a highly porous microstructured (...
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sg-ntu-dr.10356-875772020-03-07T11:35:30Z High-performance reverse osmosis membranes fabricated on highly porous microstructured supports Lee, Jaewoo Wang, Rong Bae, Tae-Hyun School of Chemical and Biomedical Engineering School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Reverse Osmosis Thin-film Composite Increasing the surface porosity of a support membrane has been proposed as an effective way to improve the water permeability of thin-film composite (TFC) reverse osmosis (RO) membranes by reducing the diffusion pathway in the active layer. In this work, we prepared a highly porous microstructured (HPμS) support membrane with a suitable mechanical strength to enhance the water permeability of an RO membrane. The HPμS support membrane was prepared by increasing the thermodynamic instability of a 10 wt% polymer solution and thereby facilitating rapid desolvation. The rapid desolvation formed the narrow and regularly arranged pore structure in the sublayer, and we proposed the mechanism for the sublayer structure formation based on analyses of the thermodynamic properties of such a binary system. Owing to the narrow and regular structure, the HPμS support membranes showed the exceptional mechanical strength, which was comparable to the strength of support membranes used for conventional RO membranes. Also, the HPμS support membranes successfully endowed an in-house RO membrane with the performance (water permeability of 4.68 L m−2 h−1 bar−1 and NaCl rejection of 98.3%) surpassing commercial RO membranes and thin-film nanocomposite membranes recently reported in the literature. NRF (Natl Research Foundation, S’pore) 2018-03-02T04:42:22Z 2019-12-06T16:44:50Z 2018-03-02T04:42:22Z 2019-12-06T16:44:50Z 2018 2018 Journal Article Lee, J., Wang, R., & Bae, T.-H. (2018). High-performance reverse osmosis membranes fabricated on highly porous microstructured supports. Desalination, 436, 48-55. 0011-9164 https://hdl.handle.net/10356/87577 http://hdl.handle.net/10220/44482 10.1016/j.desal.2018.01.037 203438 en Desalination © 2018 Elsevier. |
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Reverse Osmosis Thin-film Composite Lee, Jaewoo Wang, Rong Bae, Tae-Hyun High-performance reverse osmosis membranes fabricated on highly porous microstructured supports |
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Increasing the surface porosity of a support membrane has been proposed as an effective way to improve the water permeability of thin-film composite (TFC) reverse osmosis (RO) membranes by reducing the diffusion pathway in the active layer. In this work, we prepared a highly porous microstructured (HPμS) support membrane with a suitable mechanical strength to enhance the water permeability of an RO membrane. The HPμS support membrane was prepared by increasing the thermodynamic instability of a 10 wt% polymer solution and thereby facilitating rapid desolvation. The rapid desolvation formed the narrow and regularly arranged pore structure in the sublayer, and we proposed the mechanism for the sublayer structure formation based on analyses of the thermodynamic properties of such a binary system. Owing to the narrow and regular structure, the HPμS support membranes showed the exceptional mechanical strength, which was comparable to the strength of support membranes used for conventional RO membranes. Also, the HPμS support membranes successfully endowed an in-house RO membrane with the performance (water permeability of 4.68 L m−2 h−1 bar−1 and NaCl rejection of 98.3%) surpassing commercial RO membranes and thin-film nanocomposite membranes recently reported in the literature. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Lee, Jaewoo Wang, Rong Bae, Tae-Hyun |
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Article |
author |
Lee, Jaewoo Wang, Rong Bae, Tae-Hyun |
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Lee, Jaewoo |
title |
High-performance reverse osmosis membranes fabricated on highly porous microstructured supports |
title_short |
High-performance reverse osmosis membranes fabricated on highly porous microstructured supports |
title_full |
High-performance reverse osmosis membranes fabricated on highly porous microstructured supports |
title_fullStr |
High-performance reverse osmosis membranes fabricated on highly porous microstructured supports |
title_full_unstemmed |
High-performance reverse osmosis membranes fabricated on highly porous microstructured supports |
title_sort |
high-performance reverse osmosis membranes fabricated on highly porous microstructured supports |
publishDate |
2018 |
url |
https://hdl.handle.net/10356/87577 http://hdl.handle.net/10220/44482 |
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1681047682763718656 |