Towards a High-Flux Separation Layer from Hexagonal Lyotropic Liquid Crystals for Thin-Film Composite Membranes

Hexagonal lyotropic liquid crystals (HLLC) with uniform pore size in the range of 1~5 nm are highly sought after as promising active separation layers of thin-film composite (TFC) membranes, which have been confirmed to be efficient for water purification. The potential interaction between an amphip...

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Autores principales:	Senlin Gu, Bao Yuan, Bo Bai, Xin Tong, Luke A. O’Dell, Dong Wang, Lingxue Kong, Guang Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hexagonal lyotropic liquid crystal hydrophobic/hydrophilic substrates thin-film composite membranes Chemical technology TP1-1185 Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/0bd4ff51fc0d4750af5fdd279337837a
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spelling	oai:doaj.org-article:0bd4ff51fc0d4750af5fdd279337837a2021-11-25T18:19:44ZTowards a High-Flux Separation Layer from Hexagonal Lyotropic Liquid Crystals for Thin-Film Composite Membranes10.3390/membranes111108422077-0375https://doaj.org/article/0bd4ff51fc0d4750af5fdd279337837a2021-10-01T00:00:00Zhttps://www.mdpi.com/2077-0375/11/11/842https://doaj.org/toc/2077-0375Hexagonal lyotropic liquid crystals (HLLC) with uniform pore size in the range of 1~5 nm are highly sought after as promising active separation layers of thin-film composite (TFC) membranes, which have been confirmed to be efficient for water purification. The potential interaction between an amphiphile-based HLLC layer and the substrate surface, however, has not been fully explored. In this research, hydrophilic and hydrophobic microporous polyvinylidene fluoride (PVDF) substrates were chosen, respectively, to prepare TFC membranes with the active layers templated from HLLC, consisting of dodecyl trimethylammonium bromide, water, and a mixture of poly (ethylene glycol) diacrylate and 2-hydroxyethyl methacrylate. The pore size of the active layer was found to decrease by about 1.6 Å compared to that of the free-standing HLLC after polymerization, but no significant difference was observable by using either hydrophilic or hydrophobic substrates (26.9 Å vs. 27.1 Å). The water flux of the TFC membrane with the hydrophobic substrate, however, was higher than that with the hydrophilic one. A further investigation confirmed that the increase in water flux originated from a much higher porosity was due to the synergistic effect of the hydrophilic HLLC nanoporous material and the hydrophobic substrate.Senlin GuBao YuanBo BaiXin TongLuke A. O’DellDong WangLingxue KongGuang WangMDPI AGarticlehexagonal lyotropic liquid crystalhydrophobic/hydrophilic substratesthin-film composite membranesChemical technologyTP1-1185Chemical engineeringTP155-156ENMembranes, Vol 11, Iss 842, p 842 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hexagonal lyotropic liquid crystal hydrophobic/hydrophilic substrates thin-film composite membranes Chemical technology TP1-1185 Chemical engineering TP155-156
spellingShingle	hexagonal lyotropic liquid crystal hydrophobic/hydrophilic substrates thin-film composite membranes Chemical technology TP1-1185 Chemical engineering TP155-156 Senlin Gu Bao Yuan Bo Bai Xin Tong Luke A. O’Dell Dong Wang Lingxue Kong Guang Wang Towards a High-Flux Separation Layer from Hexagonal Lyotropic Liquid Crystals for Thin-Film Composite Membranes
description	Hexagonal lyotropic liquid crystals (HLLC) with uniform pore size in the range of 1~5 nm are highly sought after as promising active separation layers of thin-film composite (TFC) membranes, which have been confirmed to be efficient for water purification. The potential interaction between an amphiphile-based HLLC layer and the substrate surface, however, has not been fully explored. In this research, hydrophilic and hydrophobic microporous polyvinylidene fluoride (PVDF) substrates were chosen, respectively, to prepare TFC membranes with the active layers templated from HLLC, consisting of dodecyl trimethylammonium bromide, water, and a mixture of poly (ethylene glycol) diacrylate and 2-hydroxyethyl methacrylate. The pore size of the active layer was found to decrease by about 1.6 Å compared to that of the free-standing HLLC after polymerization, but no significant difference was observable by using either hydrophilic or hydrophobic substrates (26.9 Å vs. 27.1 Å). The water flux of the TFC membrane with the hydrophobic substrate, however, was higher than that with the hydrophilic one. A further investigation confirmed that the increase in water flux originated from a much higher porosity was due to the synergistic effect of the hydrophilic HLLC nanoporous material and the hydrophobic substrate.
format	article
author	Senlin Gu Bao Yuan Bo Bai Xin Tong Luke A. O’Dell Dong Wang Lingxue Kong Guang Wang
author_facet	Senlin Gu Bao Yuan Bo Bai Xin Tong Luke A. O’Dell Dong Wang Lingxue Kong Guang Wang
author_sort	Senlin Gu
title	Towards a High-Flux Separation Layer from Hexagonal Lyotropic Liquid Crystals for Thin-Film Composite Membranes
title_short	Towards a High-Flux Separation Layer from Hexagonal Lyotropic Liquid Crystals for Thin-Film Composite Membranes
title_full	Towards a High-Flux Separation Layer from Hexagonal Lyotropic Liquid Crystals for Thin-Film Composite Membranes
title_fullStr	Towards a High-Flux Separation Layer from Hexagonal Lyotropic Liquid Crystals for Thin-Film Composite Membranes
title_full_unstemmed	Towards a High-Flux Separation Layer from Hexagonal Lyotropic Liquid Crystals for Thin-Film Composite Membranes
title_sort	towards a high-flux separation layer from hexagonal lyotropic liquid crystals for thin-film composite membranes
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/0bd4ff51fc0d4750af5fdd279337837a
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Towards a High-Flux Separation Layer from Hexagonal Lyotropic Liquid Crystals for Thin-Film Composite Membranes

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