Electrospun nanofiber membranes incorporating fluorosilane-coated TiO<inf>2</inf> nanocomposite for direct contact membrane distillation

Lee, EJ; An, AK; He, T; Woo, YC; Shon, HK

Electrospun nanofiber membranes incorporating fluorosilane-coated TiO<inf>2</inf> nanocomposite for direct contact membrane distillation

Lee, EJ An, AK He, T Woo, YC

Shon, HK

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Publication Type:: Journal Article
Citation:: Journal of Membrane Science, 2016, 520 pp. 145 - 154
Issue Date:: 2016-12-15

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Field	Value	Language
dc.contributor.author	Lee, EJ	en_US
dc.contributor.author	An, AK	en_US
dc.contributor.author	He, T	en_US
dc.contributor.author	Woo, YC https://orcid.org/0000-0003-0847-3067	en_US
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.date.available	2020-05-25T19:24:14Z
dc.date.issued	2016-12-15	en_US
dc.identifier.citation	Journal of Membrane Science, 2016, 520 pp. 145 - 154	en_US
dc.identifier.issn	0376-7388	en_US
dc.identifier.uri	http://hdl.handle.net/10453/49957
dc.description.abstract	© 2016 Elsevier B.V. The electrospinning technique as a method for fabricating hydrophobic membranes for membrane distillation (MD) has received much attention in recent times. In this study, TiO2 functionalized with 1H,1H,2H,2H-perfluorooctyltriethoxysilane was added directly to the dope solution for electrospinning in order to increase the hydrophobicity of the resulting MD membranes. Three concentrations (10%, 15% and 20%) of polyvinylidene fluoride-co-hexafluoropropylene (PH) dope solution were used for electrospinning with various amounts of TiO2 (1%, 5% and 10%) to generate nanofibers. The electrospun nanofiber membrane (ENM) of 20% PH with 10% TiO2 exhibited the highest surface hydrophobicity (contact angle=149°) resulting from good dispersion of the TiO2 particles, while the highest liquid entry pressure of 194.5 kPa was observed for the ENM comprising 10% PH with 10% TiO2 due to its reduced pore sizes. Furthermore, the ENMs containing 10% TiO2 exhibited better flux and stable salt rejection than commercial and ENMs without TiO2. Notably, there was no severe wetting in the 20% PH ENM with 10% TiO2 over seven days of operation, despite the high salt concentration (7.0 wt% NaCl) of the feed water.	en_US
dc.relation.ispartof	Journal of Membrane Science	en_US
dc.relation.isbasedon	10.1016/j.memsci.2016.07.019	en_US
dc.subject.classification	Chemical Engineering	en_US
dc.title	Electrospun nanofiber membranes incorporating fluorosilane-coated TiO<inf>2</inf> nanocomposite for direct contact membrane distillation	en_US
dc.type	Journal Article
utslib.citation.volume	520	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access
pubs.publication-status	Published	en_US
pubs.volume	520	en_US

Abstract:

© 2016 Elsevier B.V. The electrospinning technique as a method for fabricating hydrophobic membranes for membrane distillation (MD) has received much attention in recent times. In this study, TiO2 functionalized with 1H,1H,2H,2H-perfluorooctyltriethoxysilane was added directly to the dope solution for electrospinning in order to increase the hydrophobicity of the resulting MD membranes. Three concentrations (10%, 15% and 20%) of polyvinylidene fluoride-co-hexafluoropropylene (PH) dope solution were used for electrospinning with various amounts of TiO2 (1%, 5% and 10%) to generate nanofibers. The electrospun nanofiber membrane (ENM) of 20% PH with 10% TiO2 exhibited the highest surface hydrophobicity (contact angle=149°) resulting from good dispersion of the TiO2 particles, while the highest liquid entry pressure of 194.5 kPa was observed for the ENM comprising 10% PH with 10% TiO2 due to its reduced pore sizes. Furthermore, the ENMs containing 10% TiO2 exhibited better flux and stable salt rejection than commercial and ENMs without TiO2. Notably, there was no severe wetting in the 20% PH ENM with 10% TiO2 over seven days of operation, despite the high salt concentration (7.0 wt% NaCl) of the feed water.

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http://hdl.handle.net/10453/49957