Assessing the Performance of Thin-Film Nanofiltration Membranes with Embedded Montmorillonites
In this study, the basal spacing of montmorillonite (MMT) was modified through ion exchange. Two kinds of MMT were used: sodium-modified MMT (Na-MMT) and organo-modified MMT (O-MMT). These two particles were incorporated separately into the thin-film nanocomposite polyamide membrane through the inte...
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doaj-2bc8ef6188f04822ae96b489399581c02020-11-25T02:59:50ZengMDPI AGMembranes2077-03752020-04-0110797910.3390/membranes10050079Assessing the Performance of Thin-Film Nanofiltration Membranes with Embedded MontmorillonitesMicah Belle Marie Yap Ang0Amira Beatriz Gaces Deang1Ruth R. Aquino2Blessie A. Basilia3Shu-Hsien Huang4Kueir-Rarn Lee5Juin-Yih Lai6R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 32023, TaiwanSchool of Chemical, Biological, and Materials Engineering and Sciences, Mapúa University, Manila 1002, PhilippinesSchool of Chemical, Biological, and Materials Engineering and Sciences, Mapúa University, Manila 1002, PhilippinesSchool of Chemical, Biological, and Materials Engineering and Sciences, Mapúa University, Manila 1002, PhilippinesR&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 32023, TaiwanR&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 32023, TaiwanR&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan 32023, TaiwanIn this study, the basal spacing of montmorillonite (MMT) was modified through ion exchange. Two kinds of MMT were used: sodium-modified MMT (Na-MMT) and organo-modified MMT (O-MMT). These two particles were incorporated separately into the thin-film nanocomposite polyamide membrane through the interfacial polymerization of piperazine and trimesoyl chloride in n-hexane. The membrane with O-MMT (TFN<sub>O-MMT</sub>) has a more hydrophilic surface compared to that of membrane with Na-MMT (TFN<sub>Na-MMT</sub>). When various types of MMT were dispersed in the n-hexane solution with trimesoyl chloride (TMC), O-MMT was well-dispersed than Na-MMT. The poor dispersion of Na-MMT in n-hexane led to the aggregation of Na-MMT on the surface of TFN<sub>Na-MMT.</sub> TFN<sub>O-MMT</sub> displayed a uniform distribution of O-MMT on the surface, because O-MMT was well-dispersed in n-hexane. In comparison with the pristine and TFN<sub>Na-MMT</sub> membranes, TFN<sub>O-MMT</sub> delivered the highest pure water flux of 53.15 ± 3.30 L∙m<sup>−2</sup>∙h<sup>−1</sup> at 6 bar, while its salt rejection for divalent ions remained at 95%–99%. Furthermore, it had stable performance in wide operating condition, and it exhibited a magnificent antifouling property. Therefore, a suitable type of MMT could lead to high separation efficiency.https://www.mdpi.com/2077-0375/10/5/79montmorillonitepolyamidethin-film nanocompositemembrane separationnanofiltration |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Micah Belle Marie Yap Ang Amira Beatriz Gaces Deang Ruth R. Aquino Blessie A. Basilia Shu-Hsien Huang Kueir-Rarn Lee Juin-Yih Lai |
spellingShingle |
Micah Belle Marie Yap Ang Amira Beatriz Gaces Deang Ruth R. Aquino Blessie A. Basilia Shu-Hsien Huang Kueir-Rarn Lee Juin-Yih Lai Assessing the Performance of Thin-Film Nanofiltration Membranes with Embedded Montmorillonites Membranes montmorillonite polyamide thin-film nanocomposite membrane separation nanofiltration |
author_facet |
Micah Belle Marie Yap Ang Amira Beatriz Gaces Deang Ruth R. Aquino Blessie A. Basilia Shu-Hsien Huang Kueir-Rarn Lee Juin-Yih Lai |
author_sort |
Micah Belle Marie Yap Ang |
title |
Assessing the Performance of Thin-Film Nanofiltration Membranes with Embedded Montmorillonites |
title_short |
Assessing the Performance of Thin-Film Nanofiltration Membranes with Embedded Montmorillonites |
title_full |
Assessing the Performance of Thin-Film Nanofiltration Membranes with Embedded Montmorillonites |
title_fullStr |
Assessing the Performance of Thin-Film Nanofiltration Membranes with Embedded Montmorillonites |
title_full_unstemmed |
Assessing the Performance of Thin-Film Nanofiltration Membranes with Embedded Montmorillonites |
title_sort |
assessing the performance of thin-film nanofiltration membranes with embedded montmorillonites |
publisher |
MDPI AG |
series |
Membranes |
issn |
2077-0375 |
publishDate |
2020-04-01 |
description |
In this study, the basal spacing of montmorillonite (MMT) was modified through ion exchange. Two kinds of MMT were used: sodium-modified MMT (Na-MMT) and organo-modified MMT (O-MMT). These two particles were incorporated separately into the thin-film nanocomposite polyamide membrane through the interfacial polymerization of piperazine and trimesoyl chloride in n-hexane. The membrane with O-MMT (TFN<sub>O-MMT</sub>) has a more hydrophilic surface compared to that of membrane with Na-MMT (TFN<sub>Na-MMT</sub>). When various types of MMT were dispersed in the n-hexane solution with trimesoyl chloride (TMC), O-MMT was well-dispersed than Na-MMT. The poor dispersion of Na-MMT in n-hexane led to the aggregation of Na-MMT on the surface of TFN<sub>Na-MMT.</sub> TFN<sub>O-MMT</sub> displayed a uniform distribution of O-MMT on the surface, because O-MMT was well-dispersed in n-hexane. In comparison with the pristine and TFN<sub>Na-MMT</sub> membranes, TFN<sub>O-MMT</sub> delivered the highest pure water flux of 53.15 ± 3.30 L∙m<sup>−2</sup>∙h<sup>−1</sup> at 6 bar, while its salt rejection for divalent ions remained at 95%–99%. Furthermore, it had stable performance in wide operating condition, and it exhibited a magnificent antifouling property. Therefore, a suitable type of MMT could lead to high separation efficiency. |
topic |
montmorillonite polyamide thin-film nanocomposite membrane separation nanofiltration |
url |
https://www.mdpi.com/2077-0375/10/5/79 |
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