PVDF membranes containing alkyl and perfluoroalkyl-functionalized graphene nanosheets for improved membrane distillation

Polyvinylidene fluoride (PVDF) membranes containing hydrophobic graphene nanofillers were prepared and tested for membrane distillation applications. The nanofillers were obtained by a two-step process: 1st) chemical grafting of hydrophobic molecules, either octylamine (OA) or perfluoroctylamine (PF...

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Autores: Luque-Alled, José Miguel, Leaper, Sebastian, Abdel-Karim, Ahmed, Skuse, Clara, Gorgojo, Patricia
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/333977
Acesso em linha:http://hdl.handle.net/10261/333977
Access Level:acceso abierto
Palavra-chave:Membrane distillation
Hydrophobic functionalization
Graphene oxide
Polyvinylidene fluoride
Desalination
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spelling PVDF membranes containing alkyl and perfluoroalkyl-functionalized graphene nanosheets for improved membrane distillationLuque-Alled, José MiguelLeaper, SebastianAbdel-Karim, AhmedSkuse, ClaraGorgojo, PatriciaMembrane distillationHydrophobic functionalizationGraphene oxidePolyvinylidene fluorideDesalinationPolyvinylidene fluoride (PVDF) membranes containing hydrophobic graphene nanofillers were prepared and tested for membrane distillation applications. The nanofillers were obtained by a two-step process: 1st) chemical grafting of hydrophobic molecules, either octylamine (OA) or perfluoroctylamine (PFOA), to graphene oxide (GO) nanosheets, and 2nd) chemical reduction of functionalized GO (rGO) to remove unreacted oxygen-containing functional groups. This resulted in OA-functionalized reduced GO (OA-rGO) and PFOA-functionalized rGO (PFOA-rGO). The addition of these nanomaterials to PVDF membranes prepared by the phase inversion process led to an increase in the membrane contact angle, and therefore higher hydrophobicity, as well as an increase in the membrane porosity. When comparing both nanofillers, OA-rGO and PFOA-rGO, the latter was more efficient in achieving higher contact angles due to the presence of fluorine atoms, whereas OA-rGO led to a greater enhancement in membrane porosity as compared to PFOA-rGO. MMMs containing 0.7 wt% nanofiller loadings of OA-rGO and PFOA-rGO achieved the highest water fluxes of 9.1 and 8.8 L m−2 h−1, respectively and salt rejection above 99.9%, which was monitored for at least 162 h of operation for the former. In comparison with pure PVDF (flux of 5 L m−2 h−1), the addition of OA-rGO and PFOA-rGO nanofillers results in a flux increment of 82% and 76%, respectively.The authors acknowledge the Engineering and Physical Sciences Research Council (EPSRC) grant EP/S032258/1 for supporting this work. Patricia Gorgojo is supported by Grant RYC2019-027060-I funded by MICIN/AEI/10.13039/501100011033 and by “ESF Investing in your future”. Jose Miguel Luque-Alled acknowledges the Spanish Ministerio de Economía y Competitividad and the European Social Fund for his Margarita Salas Fellowship, and the Department of Chemical Engineering of the University of Manchester for funding his PhD studies.Peer reviewedElsevierEngineering and Physical Sciences Research Council (UK)Agencia Estatal de Investigación (España)Ministerio de Ciencia, Innovación y Universidades (España)European CommissionMinisterio de Economía y Competitividad (España)University of ManchesterConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/333977reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI//RYC2019-027060-IThe underlying dataset has been published as supplementary material of the article in the publisher platform at DOI 10.1016/j.jece.2023.109898https://doi.org/10.1016/j.jece.2023.109898Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3339772026-05-22T06:33:51Z
dc.title.none.fl_str_mv PVDF membranes containing alkyl and perfluoroalkyl-functionalized graphene nanosheets for improved membrane distillation
title PVDF membranes containing alkyl and perfluoroalkyl-functionalized graphene nanosheets for improved membrane distillation
spellingShingle PVDF membranes containing alkyl and perfluoroalkyl-functionalized graphene nanosheets for improved membrane distillation
Luque-Alled, José Miguel
Membrane distillation
Hydrophobic functionalization
Graphene oxide
Polyvinylidene fluoride
Desalination
title_short PVDF membranes containing alkyl and perfluoroalkyl-functionalized graphene nanosheets for improved membrane distillation
title_full PVDF membranes containing alkyl and perfluoroalkyl-functionalized graphene nanosheets for improved membrane distillation
title_fullStr PVDF membranes containing alkyl and perfluoroalkyl-functionalized graphene nanosheets for improved membrane distillation
title_full_unstemmed PVDF membranes containing alkyl and perfluoroalkyl-functionalized graphene nanosheets for improved membrane distillation
title_sort PVDF membranes containing alkyl and perfluoroalkyl-functionalized graphene nanosheets for improved membrane distillation
dc.creator.none.fl_str_mv Luque-Alled, José Miguel
Leaper, Sebastian
Abdel-Karim, Ahmed
Skuse, Clara
Gorgojo, Patricia
author Luque-Alled, José Miguel
author_facet Luque-Alled, José Miguel
Leaper, Sebastian
Abdel-Karim, Ahmed
Skuse, Clara
Gorgojo, Patricia
author_role author
author2 Leaper, Sebastian
Abdel-Karim, Ahmed
Skuse, Clara
Gorgojo, Patricia
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Engineering and Physical Sciences Research Council (UK)
Agencia Estatal de Investigación (España)
Ministerio de Ciencia, Innovación y Universidades (España)
European Commission
Ministerio de Economía y Competitividad (España)
University of Manchester
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Membrane distillation
Hydrophobic functionalization
Graphene oxide
Polyvinylidene fluoride
Desalination
topic Membrane distillation
Hydrophobic functionalization
Graphene oxide
Polyvinylidene fluoride
Desalination
description Polyvinylidene fluoride (PVDF) membranes containing hydrophobic graphene nanofillers were prepared and tested for membrane distillation applications. The nanofillers were obtained by a two-step process: 1st) chemical grafting of hydrophobic molecules, either octylamine (OA) or perfluoroctylamine (PFOA), to graphene oxide (GO) nanosheets, and 2nd) chemical reduction of functionalized GO (rGO) to remove unreacted oxygen-containing functional groups. This resulted in OA-functionalized reduced GO (OA-rGO) and PFOA-functionalized rGO (PFOA-rGO). The addition of these nanomaterials to PVDF membranes prepared by the phase inversion process led to an increase in the membrane contact angle, and therefore higher hydrophobicity, as well as an increase in the membrane porosity. When comparing both nanofillers, OA-rGO and PFOA-rGO, the latter was more efficient in achieving higher contact angles due to the presence of fluorine atoms, whereas OA-rGO led to a greater enhancement in membrane porosity as compared to PFOA-rGO. MMMs containing 0.7 wt% nanofiller loadings of OA-rGO and PFOA-rGO achieved the highest water fluxes of 9.1 and 8.8 L m−2 h−1, respectively and salt rejection above 99.9%, which was monitored for at least 162 h of operation for the former. In comparison with pure PVDF (flux of 5 L m−2 h−1), the addition of OA-rGO and PFOA-rGO nanofillers results in a flux increment of 82% and 76%, respectively.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/333977
url http://hdl.handle.net/10261/333977
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI//RYC2019-027060-I
The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI 10.1016/j.jece.2023.109898
https://doi.org/10.1016/j.jece.2023.109898
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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