Tri-bore PVDF hollow fibers with a super-hydrophobic coating for membrane distillation

Handle URI:
http://hdl.handle.net/10754/608643
Title:
Tri-bore PVDF hollow fibers with a super-hydrophobic coating for membrane distillation
Authors:
Lu, Kang-Jia; Zuo, Jian; Chung, Tai-Shung
Abstract:
Membranes with good mechanical strength, high vapor flux and outstanding anti-wetting properties are essential for membrane distillation (MD) applications. In this work, porous polyvinylidene fluoride (PVDF) tri-bore hollow fiber membranes with super-hydrophobicity are developed to achieve these desired properties. The tri-bore hollow fiber offers better mechanical strength than the conventional single-bore fiber. To improve its anti-wetting properties, Teflon® AF 2400 is coated on the membrane surface. The effects of coating on membrane morphology, performance and anti-wetting properties have been thoroughly investigated. With an optimal coating condition (0.025 wt% of Teflon® AF 2400, 30 s), a super-hydrophobic surface with a contact angle of 151o is achieved. The resultant membrane shows an increase of 109% in liquid entry pressure (LEP) with a slight sacrifice of 21% in flux. Long term direct contact MD tests have confirmed that the Teflon® AF 2400 coated membrane has enhanced stability with an average flux of 21 kg m-2 h-1 and rejection of 99.99% at 60 °° C for desalination application.
KAUST Department:
Water Desalination & Reuse Research Cntr
Citation:
Tri-bore PVDF hollow fibers with a super-hydrophobic coating for membrane distillation 2016 Journal of Membrane Science
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
26-Apr-2016
DOI:
10.1016/j.memsci.2016.04.058
Type:
Article
ISSN:
03767388
Sponsors:
The authors would like to thank Singapore National Research Foundation under its Energy Innovation Research Programme for supporting the project entitled, “Using Cold Energy from Re-gasification of Liquefied Natural Gas (LNG) for Novel Hybrid Seawater Desalination Technologies” (Grant number: R-279-000-456-279). Miss Kangjia Lu would also like to thank Dr. Peng Wang and Miss Dan Hua for their valuable advices and kind support.
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0376738816302952
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorLu, Kang-Jiaen
dc.contributor.authorZuo, Jianen
dc.contributor.authorChung, Tai-Shungen
dc.date.accessioned2016-05-09T07:47:39Zen
dc.date.available2016-05-09T07:47:39Zen
dc.date.issued2016-04-26en
dc.identifier.citationTri-bore PVDF hollow fibers with a super-hydrophobic coating for membrane distillation 2016 Journal of Membrane Scienceen
dc.identifier.issn03767388en
dc.identifier.doi10.1016/j.memsci.2016.04.058en
dc.identifier.urihttp://hdl.handle.net/10754/608643en
dc.description.abstractMembranes with good mechanical strength, high vapor flux and outstanding anti-wetting properties are essential for membrane distillation (MD) applications. In this work, porous polyvinylidene fluoride (PVDF) tri-bore hollow fiber membranes with super-hydrophobicity are developed to achieve these desired properties. The tri-bore hollow fiber offers better mechanical strength than the conventional single-bore fiber. To improve its anti-wetting properties, Teflon® AF 2400 is coated on the membrane surface. The effects of coating on membrane morphology, performance and anti-wetting properties have been thoroughly investigated. With an optimal coating condition (0.025 wt% of Teflon® AF 2400, 30 s), a super-hydrophobic surface with a contact angle of 151o is achieved. The resultant membrane shows an increase of 109% in liquid entry pressure (LEP) with a slight sacrifice of 21% in flux. Long term direct contact MD tests have confirmed that the Teflon® AF 2400 coated membrane has enhanced stability with an average flux of 21 kg m-2 h-1 and rejection of 99.99% at 60 °° C for desalination application.en
dc.description.sponsorshipThe authors would like to thank Singapore National Research Foundation under its Energy Innovation Research Programme for supporting the project entitled, “Using Cold Energy from Re-gasification of Liquefied Natural Gas (LNG) for Novel Hybrid Seawater Desalination Technologies” (Grant number: R-279-000-456-279). Miss Kangjia Lu would also like to thank Dr. Peng Wang and Miss Dan Hua for their valuable advices and kind support.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0376738816302952en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Membrane Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Membrane Science, 26 April 2016. DOI: 10.1016/j.memsci.2016.04.058en
dc.subjectMembrane distillationen
dc.subjectCoatingen
dc.subjectTeflon® AF 2400en
dc.subjectTribore fiberen
dc.subjectDesalinationen
dc.titleTri-bore PVDF hollow fibers with a super-hydrophobic coating for membrane distillationen
dc.typeArticleen
dc.contributor.departmentWater Desalination & Reuse Research Cntren
dc.identifier.journalJournal of Membrane Scienceen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585en
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorChung., Tai-Shungen
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