Engineering the Re-Entrant Hierarchy and Surface Energy of PDMS-PVDF Membrane for Membrane Distillation Using a Facile and Benign Microsphere Coating

Lee, EJ; Deka, BJ; Guo, J; Woo, YC; Shon, HK; An, AK

Engineering the Re-Entrant Hierarchy and Surface Energy of PDMS-PVDF Membrane for Membrane Distillation Using a Facile and Benign Microsphere Coating

Lee, EJ Deka, BJ Guo, J Woo, YC

Shon, HK

An, AK

Permalink

Publication Type:: Journal Article
Citation:: Environmental Science and Technology, 2017, 51 (17), pp. 10117 - 10126
Issue Date:: 2017-09-05

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

Microsoft Word XML

Download Accepted Manuscript VersionMicrosoft Word XML (1.17 MB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Lee, EJ	en_US
dc.contributor.author	Deka, BJ	en_US
dc.contributor.author	Guo, J	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.contributor.author	An, AK	en_US
dc.date.available	2020-05-25T19:19:11Z
dc.date.issued	2017-09-05	en_US
dc.identifier.citation	Environmental Science and Technology, 2017, 51 (17), pp. 10117 - 10126	en_US
dc.identifier.issn	0013-936X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/123706
dc.description.abstract	© 2017 American Chemical Society. To consolidate the position of membrane distillation (MD) as an emerging membrane technology that meets global water challenges, it is crucial to develop membranes with ideal material properties. This study reports a facile approach for a polyvinylidene fluoride (PVDF) membrane surface modification that is achieved through the coating of the surface with poly(dimethylsiloxane) (PDMS) polymeric microspheres to lower the membrane surface energy. The hierarchical surface of the microspheres was built without any assistance of a nano/microcomposite by combining the rapid evaporation of tetrahydrofuran (THF) and the phase separation from condensed water vapor. The fabricated membrane exhibited superhydrophobicity - a high contact angle of 156.9° and a low contact-angle hysteresis of 11.3° - and a high wetting resistance to seawater containing sodium dodecyl sulfate (SDS). Compared with the control PVDF-hexafluoropropylene (HFP) single-layer nanofiber membrane, the proposed fabricated membrane with the polymeric microsphere layer showed a smaller pore size and higher liquid entry pressure (LEP). When it was tested for the direct-contact MD (DCMD) in terms of the desalination of seawater (3.5% of NaCl) containing SDS of a progressively increased concentration, the fabricated membrane showed stable desalination and partial wetting for the 0.1 and 0.2 mM SDS, respectively.	en_US
dc.relation	http://purl.org/au-research/grants/arc/FT140101208
dc.relation.ispartof	Environmental Science and Technology	en_US
dc.relation.isbasedon	10.1021/acs.est.7b01108	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Polyvinyls	en_US
dc.subject.mesh	Membranes, Artificial	en_US
dc.subject.mesh	Microspheres	en_US
dc.subject.mesh	Water Purification	en_US
dc.subject.mesh	Distillation	en_US
dc.title	Engineering the Re-Entrant Hierarchy and Surface Energy of PDMS-PVDF Membrane for Membrane Distillation Using a Facile and Benign Microsphere Coating	en_US
dc.type	Journal Article
utslib.citation.volume	17	en_US
utslib.citation.volume	51	en_US
utslib.for	0904 Chemical 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.issue	17	en_US
pubs.publication-status	Published	en_US
pubs.volume	51	en_US

Abstract:

© 2017 American Chemical Society. To consolidate the position of membrane distillation (MD) as an emerging membrane technology that meets global water challenges, it is crucial to develop membranes with ideal material properties. This study reports a facile approach for a polyvinylidene fluoride (PVDF) membrane surface modification that is achieved through the coating of the surface with poly(dimethylsiloxane) (PDMS) polymeric microspheres to lower the membrane surface energy. The hierarchical surface of the microspheres was built without any assistance of a nano/microcomposite by combining the rapid evaporation of tetrahydrofuran (THF) and the phase separation from condensed water vapor. The fabricated membrane exhibited superhydrophobicity - a high contact angle of 156.9° and a low contact-angle hysteresis of 11.3° - and a high wetting resistance to seawater containing sodium dodecyl sulfate (SDS). Compared with the control PVDF-hexafluoropropylene (HFP) single-layer nanofiber membrane, the proposed fabricated membrane with the polymeric microsphere layer showed a smaller pore size and higher liquid entry pressure (LEP). When it was tested for the direct-contact MD (DCMD) in terms of the desalination of seawater (3.5% of NaCl) containing SDS of a progressively increased concentration, the fabricated membrane showed stable desalination and partial wetting for the 0.1 and 0.2 mM SDS, respectively.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/123706