Enhanced vapor transport in membrane distillation via functionalized carbon nanotubes anchored into electrospun nanofibres

Handle URI:
http://hdl.handle.net/10754/622836
Title:
Enhanced vapor transport in membrane distillation via functionalized carbon nanotubes anchored into electrospun nanofibres
Authors:
An, Alicia Kyoungjin; Lee, Eui-Jong; Guo, Jiaxin; Jeong, Sanghyun; Lee, Jung Gil; Ghaffour, Noreddine ( 0000-0003-2095-4736 )
Abstract:
To ascertain membrane distillation (MD) as an emerging desalination technology to meet the global water challenge, development of membranes with ideal material properties is crucial. Functionalized carbon nanotubes (CNTs) were anchored to nanofibres of electrospun membranes. Covalent modification and fluorination of CNTs improved their dispersibility and interfacial interaction with the polymer membrane, resulting in well-aligned CNTs inside crystalline fibres with superhydrophobicity. Consideration for the chemical/physical properties of the CNT composite membranes and calculation of their theoretical fluxes revealed the mechanism of MD: CNTs facilitated the repulsive force for Knudsen and molecular diffusions, reduced the boundary-layer effect in viscous flow, and assisted surface diffusion, allowing for fast vapor transport with anti-wetting. This study shows that the role of CNTs and an optimal composite ratio can be used to reduce the gap between theoretical and experimental approaches to desalination.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Water Desalination and Reuse Research Center (WDRC)
Citation:
Kyoungjin An A, Lee E-J, Guo J, Jeong S, Lee J-G, et al. (2017) Enhanced vapor transport in membrane distillation via functionalized carbon nanotubes anchored into electrospun nanofibres. Scientific Reports 7: 41562. Available: http://dx.doi.org/10.1038/srep41562.
Publisher:
Springer Nature
Journal:
Scientific Reports
Issue Date:
30-Jan-2017
DOI:
10.1038/srep41562
Type:
Article
ISSN:
2045-2322
Sponsors:
This work was supported by the Research Grant Council of Hong Kong through the Early Career Scheme (No. 9048074) and Strategic Research Grant from City University of Hong Kong (No. 7004521). We thank Prof. LI Kwok Yiu Robert and Mr. HUNG Tak Fu for the TEM test.
Additional Links:
http://www.nature.com/articles/srep41562
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC); Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAn, Alicia Kyoungjinen
dc.contributor.authorLee, Eui-Jongen
dc.contributor.authorGuo, Jiaxinen
dc.contributor.authorJeong, Sanghyunen
dc.contributor.authorLee, Jung Gilen
dc.contributor.authorGhaffour, Noreddineen
dc.date.accessioned2017-02-07T08:28:37Z-
dc.date.available2017-02-07T08:28:37Z-
dc.date.issued2017-01-30en
dc.identifier.citationKyoungjin An A, Lee E-J, Guo J, Jeong S, Lee J-G, et al. (2017) Enhanced vapor transport in membrane distillation via functionalized carbon nanotubes anchored into electrospun nanofibres. Scientific Reports 7: 41562. Available: http://dx.doi.org/10.1038/srep41562.en
dc.identifier.issn2045-2322en
dc.identifier.doi10.1038/srep41562en
dc.identifier.urihttp://hdl.handle.net/10754/622836-
dc.description.abstractTo ascertain membrane distillation (MD) as an emerging desalination technology to meet the global water challenge, development of membranes with ideal material properties is crucial. Functionalized carbon nanotubes (CNTs) were anchored to nanofibres of electrospun membranes. Covalent modification and fluorination of CNTs improved their dispersibility and interfacial interaction with the polymer membrane, resulting in well-aligned CNTs inside crystalline fibres with superhydrophobicity. Consideration for the chemical/physical properties of the CNT composite membranes and calculation of their theoretical fluxes revealed the mechanism of MD: CNTs facilitated the repulsive force for Knudsen and molecular diffusions, reduced the boundary-layer effect in viscous flow, and assisted surface diffusion, allowing for fast vapor transport with anti-wetting. This study shows that the role of CNTs and an optimal composite ratio can be used to reduce the gap between theoretical and experimental approaches to desalination.en
dc.description.sponsorshipThis work was supported by the Research Grant Council of Hong Kong through the Early Career Scheme (No. 9048074) and Strategic Research Grant from City University of Hong Kong (No. 7004521). We thank Prof. LI Kwok Yiu Robert and Mr. HUNG Tak Fu for the TEM test.en
dc.publisherSpringer Natureen
dc.relation.urlhttp://www.nature.com/articles/srep41562en
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleEnhanced vapor transport in membrane distillation via functionalized carbon nanotubes anchored into electrospun nanofibresen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalScientific Reportsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSchool of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, Chinaen
kaust.authorJeong, Sanghyunen
kaust.authorLee, Jung Gilen
kaust.authorGhaffour, Noreddineen
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