Multifunctional characteristics of carbon fibers modified with imidazolium ionic liquids
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/252329 |
Resumo: | A multifunctional designing approach is of great importance for advanced composite applications. This study assessed the use of ionic liquids (ILs) to modify the surface of carbon fiber (CF) and impart multifunctional characteristics to it. For that, ethanolic solutions of different ILs, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-butyl-3-methylimidazolium chloride and 1-(2-hydroxyethyl)-3-methylimidazolium chloride, at different concentrations, were used to treat the CF. Fourier-transform infrared spectroscopy confirmed the presence of IL on the CF surface. The contact angle for 1% w/v IL-treated CF and DGEBA epoxy decreased by up to 35%, corresponding to an increase in surface energy of fiber, accompanied by an increase of 91% in interfacial shear strength. These enhancements were achieved with the hydroxy-functionalized IL, showing the tunability of CF properties through the N-imidazolium substituent. An increase in crystallite size along the basal plane was also found due to the ordering of the graphitic structure on the surface. Moreover, there was a decrease in electrical resistivity of 77%. In all, the imidazolium ILs were considered a promising approach to induce multifunctional characteristics, namely enhanced interfacial strength and electrical conductivity, to unsized CF, which can also be beneficial for recycled fibers without deteriorating their inherent surface properties. |
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Ghafoor, BilalSchrekker, Henri StephanAmico, Sandro Campos2022-12-03T05:11:00Z20221420-3049http://hdl.handle.net/10183/252329001152545A multifunctional designing approach is of great importance for advanced composite applications. This study assessed the use of ionic liquids (ILs) to modify the surface of carbon fiber (CF) and impart multifunctional characteristics to it. For that, ethanolic solutions of different ILs, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-butyl-3-methylimidazolium chloride and 1-(2-hydroxyethyl)-3-methylimidazolium chloride, at different concentrations, were used to treat the CF. Fourier-transform infrared spectroscopy confirmed the presence of IL on the CF surface. The contact angle for 1% w/v IL-treated CF and DGEBA epoxy decreased by up to 35%, corresponding to an increase in surface energy of fiber, accompanied by an increase of 91% in interfacial shear strength. These enhancements were achieved with the hydroxy-functionalized IL, showing the tunability of CF properties through the N-imidazolium substituent. An increase in crystallite size along the basal plane was also found due to the ordering of the graphitic structure on the surface. Moreover, there was a decrease in electrical resistivity of 77%. In all, the imidazolium ILs were considered a promising approach to induce multifunctional characteristics, namely enhanced interfacial strength and electrical conductivity, to unsized CF, which can also be beneficial for recycled fibers without deteriorating their inherent surface properties.application/pdfengMolecules. Suíça. Vol. 27, no. 20 (2022), 14 p.Fibras de carbonoLíquidos iônicosTratamento de superfíciesTask-specific ionic liquidCarbon fiber recyclingElectrical resistivityInterfacial bondingEpoxyMultifunctional characteristics of carbon fibers modified with imidazolium ionic liquidsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001152545.pdf.txt001152545.pdf.txtExtracted Texttext/plain54703http://www.lume.ufrgs.br/bitstream/10183/252329/2/001152545.pdf.txte9ad8926681a417d95fe2a4757e2a028MD52ORIGINAL001152545.pdfTexto completo (inglês)application/pdf3549606http://www.lume.ufrgs.br/bitstream/10183/252329/1/001152545.pdf93ef054b7b752b72d96a9a7efe4b68aeMD5110183/2523292022-12-04 05:52:50.955337oai:www.lume.ufrgs.br:10183/252329Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-12-04T07:52:50Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Multifunctional characteristics of carbon fibers modified with imidazolium ionic liquids |
title |
Multifunctional characteristics of carbon fibers modified with imidazolium ionic liquids |
spellingShingle |
Multifunctional characteristics of carbon fibers modified with imidazolium ionic liquids Ghafoor, Bilal Fibras de carbono Líquidos iônicos Tratamento de superfícies Task-specific ionic liquid Carbon fiber recycling Electrical resistivity Interfacial bonding Epoxy |
title_short |
Multifunctional characteristics of carbon fibers modified with imidazolium ionic liquids |
title_full |
Multifunctional characteristics of carbon fibers modified with imidazolium ionic liquids |
title_fullStr |
Multifunctional characteristics of carbon fibers modified with imidazolium ionic liquids |
title_full_unstemmed |
Multifunctional characteristics of carbon fibers modified with imidazolium ionic liquids |
title_sort |
Multifunctional characteristics of carbon fibers modified with imidazolium ionic liquids |
author |
Ghafoor, Bilal |
author_facet |
Ghafoor, Bilal Schrekker, Henri Stephan Amico, Sandro Campos |
author_role |
author |
author2 |
Schrekker, Henri Stephan Amico, Sandro Campos |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Ghafoor, Bilal Schrekker, Henri Stephan Amico, Sandro Campos |
dc.subject.por.fl_str_mv |
Fibras de carbono Líquidos iônicos Tratamento de superfícies |
topic |
Fibras de carbono Líquidos iônicos Tratamento de superfícies Task-specific ionic liquid Carbon fiber recycling Electrical resistivity Interfacial bonding Epoxy |
dc.subject.eng.fl_str_mv |
Task-specific ionic liquid Carbon fiber recycling Electrical resistivity Interfacial bonding Epoxy |
description |
A multifunctional designing approach is of great importance for advanced composite applications. This study assessed the use of ionic liquids (ILs) to modify the surface of carbon fiber (CF) and impart multifunctional characteristics to it. For that, ethanolic solutions of different ILs, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, 1-butyl-3-methylimidazolium chloride and 1-(2-hydroxyethyl)-3-methylimidazolium chloride, at different concentrations, were used to treat the CF. Fourier-transform infrared spectroscopy confirmed the presence of IL on the CF surface. The contact angle for 1% w/v IL-treated CF and DGEBA epoxy decreased by up to 35%, corresponding to an increase in surface energy of fiber, accompanied by an increase of 91% in interfacial shear strength. These enhancements were achieved with the hydroxy-functionalized IL, showing the tunability of CF properties through the N-imidazolium substituent. An increase in crystallite size along the basal plane was also found due to the ordering of the graphitic structure on the surface. Moreover, there was a decrease in electrical resistivity of 77%. In all, the imidazolium ILs were considered a promising approach to induce multifunctional characteristics, namely enhanced interfacial strength and electrical conductivity, to unsized CF, which can also be beneficial for recycled fibers without deteriorating their inherent surface properties. |
publishDate |
2022 |
dc.date.accessioned.fl_str_mv |
2022-12-03T05:11:00Z |
dc.date.issued.fl_str_mv |
2022 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/252329 |
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1420-3049 |
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001152545 |
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http://hdl.handle.net/10183/252329 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Molecules. Suíça. Vol. 27, no. 20 (2022), 14 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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