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Article: Robust superhydrophobic-superoleophilic polytetrafluoroethylene nanofibrous membrane for oil/water separation

TitleRobust superhydrophobic-superoleophilic polytetrafluoroethylene nanofibrous membrane for oil/water separation
Authors
KeywordsSuperhydrophobic
Superoleophilic
Oil/water separation
Polytetrafluoroethylene
Nanofibrous membrane
Issue Date2017
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal of Membrane Science, 2017, v. 540, p. 354-361 How to Cite?
AbstractA robust polytetrafluoroethylene (PTFE) nanofibrous membrane was prepared by a simple electrospinning-sintering strategy for efficient oil/water separation. Specifically, a PTFE@PVA hybrid nanofibrous membrane in which PTFE particles were uniformly distributed in PVA nanofiber was first prepared by electrospinning, then a sintering treatment was applied to obtain the PTFE nanofibrous membrane. Electron microscopic characterization revealed that the membrane was formed by a sintering mechanism of a fast decomposition of PVA followed by a slower fusion of PTFE particles. Spectroscopic characterization confirmed that the PVA polymer was completely decomposed after 8 h of sintering. The resulting membrane had a ratio of fluorine to carbon atomic ratio of 2.0, indicating that a pure PTFE nanofibrous membrane was obtained. The as-prepared PTFE membrane exhibited superhydrophobic property with a water contact angle of 155.0° and a sliding angle of 5.1°. Its tensile strength was as high as 19.7 MPa, indicating excellent mechanical strength. The membrane was successfully applied for gravity-driven oil/water separation with a permeate flux of 1215 L m−2 h−1. Moreover, its excellent corrosion resistance and mechanical stability suggest that the PTFE nanofibrous membrane could stand harsh environment existing in industrial oil/water separation processes.
Persistent Identifierhttp://hdl.handle.net/10722/247310
ISSN
2019 Impact Factor: 7.183
2015 SCImago Journal Rankings: 2.042
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorQing, W-
dc.contributor.authorShi, X-
dc.contributor.authorDeng, Y-
dc.contributor.authorZhang, W-
dc.contributor.authorWang, J-
dc.contributor.authorTang, CY-
dc.date.accessioned2017-10-18T08:25:23Z-
dc.date.available2017-10-18T08:25:23Z-
dc.date.issued2017-
dc.identifier.citationJournal of Membrane Science, 2017, v. 540, p. 354-361-
dc.identifier.issn0376-7388-
dc.identifier.urihttp://hdl.handle.net/10722/247310-
dc.description.abstractA robust polytetrafluoroethylene (PTFE) nanofibrous membrane was prepared by a simple electrospinning-sintering strategy for efficient oil/water separation. Specifically, a PTFE@PVA hybrid nanofibrous membrane in which PTFE particles were uniformly distributed in PVA nanofiber was first prepared by electrospinning, then a sintering treatment was applied to obtain the PTFE nanofibrous membrane. Electron microscopic characterization revealed that the membrane was formed by a sintering mechanism of a fast decomposition of PVA followed by a slower fusion of PTFE particles. Spectroscopic characterization confirmed that the PVA polymer was completely decomposed after 8 h of sintering. The resulting membrane had a ratio of fluorine to carbon atomic ratio of 2.0, indicating that a pure PTFE nanofibrous membrane was obtained. The as-prepared PTFE membrane exhibited superhydrophobic property with a water contact angle of 155.0° and a sliding angle of 5.1°. Its tensile strength was as high as 19.7 MPa, indicating excellent mechanical strength. The membrane was successfully applied for gravity-driven oil/water separation with a permeate flux of 1215 L m−2 h−1. Moreover, its excellent corrosion resistance and mechanical stability suggest that the PTFE nanofibrous membrane could stand harsh environment existing in industrial oil/water separation processes.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci-
dc.relation.ispartofJournal of Membrane Science-
dc.subjectSuperhydrophobic-
dc.subjectSuperoleophilic-
dc.subjectOil/water separation-
dc.subjectPolytetrafluoroethylene-
dc.subjectNanofibrous membrane-
dc.titleRobust superhydrophobic-superoleophilic polytetrafluoroethylene nanofibrous membrane for oil/water separation-
dc.typeArticle-
dc.identifier.emailQing, W: qingwh@hku.hk-
dc.identifier.emailTang, CY: tangc@hku.hk-
dc.identifier.authorityTang, CY=rp01765-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.memsci.2017.06.060-
dc.identifier.scopuseid_2-s2.0-85021393894-
dc.identifier.hkuros281292-
dc.identifier.volume540-
dc.identifier.spage354-
dc.identifier.epage361-
dc.identifier.isiWOS:000407954300036-
dc.publisher.placeNetherlands-
dc.identifier.issnl0376-7388-

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