Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive Properties

Good dispersion of carbon nanotubes (CNTs) together with effective curing were obtained in epoxy/CNT nanocomposites (NCs) using three different ionic liquids (ILs). Compared to conventional amine-cured epoxy systems, lower electrical percolation thresholds were obtained in some of the IL-based epoxy...

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Autores: Orduña Velasco, Lidia, Otaegi Tena, Itziar, Aramburu Ocáriz, Nora, Guerrica Echevarría Estanga, Gonzalo María
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/60071
Acceso en línea:http://hdl.handle.net/10810/60071
Access Level:acceso abierto
Palabra clave:epoxy resin
ionic liquid
carbon nanotube
nanocomposite
curing agent
dispersing agent
mechanical properties
lap shear
conductivity
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spelling Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive PropertiesOrduña Velasco, LidiaOtaegi Tena, ItziarAramburu Ocáriz, NoraGuerrica Echevarría Estanga, Gonzalo Maríaepoxy resinionic liquidcarbon nanotubenanocompositecuring agentdispersing agentmechanical propertieslap shearconductivityGood dispersion of carbon nanotubes (CNTs) together with effective curing were obtained in epoxy/CNT nanocomposites (NCs) using three different ionic liquids (ILs). Compared to conventional amine-cured epoxy systems, lower electrical percolation thresholds were obtained in some of the IL-based epoxy systems. For example, the percolation threshold of the trihexyltetradecylphosphonium dicyanamide (IL-P-DCA)-based system was 0.001 wt.%. The addition of CNTs was not found to have any significant effect on the thermal or low-strain mechanical properties of the nanocomposites, but it did improve their adhesive properties considerably compared to the unfilled systems. This study demonstrates that ILs can be used to successfully replace traditional amine-based curing agents for the production of electrically conductive epoxy/CNT NCs and adhesives, as a similar or better balance of properties was achieved. This represents a step towards greater sustainability given that the vapor pressure of ILs is low, and the amount needed to effectively cure epoxy resins is significantly lower than any of their counterparts.This research was funded by Ministerio de Economía y Competitividad (MINECO, Spain) (MAT2017-84116-R), Basque Government (Eusko Jaurlaritza) (Project IT1309-19) and the University of the Basque Country (UPV/EHU) (pre-doctoral grant awarded to Lidia Orduna).MDPI2023202320232023info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/60071reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/MINECO/MAT2017-84116-R/https://www.mdpi.com/2079-4991/13/4/725info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/ 4.0/).oai:addi.ehu.eus:10810/600712026-06-18T09:23:17Z
dc.title.none.fl_str_mv Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive Properties
title Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive Properties
spellingShingle Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive Properties
Orduña Velasco, Lidia
epoxy resin
ionic liquid
carbon nanotube
nanocomposite
curing agent
dispersing agent
mechanical properties
lap shear
conductivity
title_short Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive Properties
title_full Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive Properties
title_fullStr Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive Properties
title_full_unstemmed Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive Properties
title_sort Ionic Liquids as Alternative Curing Agents for Conductive Epoxy/CNT Nanocomposites with Improved Adhesive Properties
dc.creator.none.fl_str_mv Orduña Velasco, Lidia
Otaegi Tena, Itziar
Aramburu Ocáriz, Nora
Guerrica Echevarría Estanga, Gonzalo María
author Orduña Velasco, Lidia
author_facet Orduña Velasco, Lidia
Otaegi Tena, Itziar
Aramburu Ocáriz, Nora
Guerrica Echevarría Estanga, Gonzalo María
author_role author
author2 Otaegi Tena, Itziar
Aramburu Ocáriz, Nora
Guerrica Echevarría Estanga, Gonzalo María
author2_role author
author
author
dc.subject.none.fl_str_mv epoxy resin
ionic liquid
carbon nanotube
nanocomposite
curing agent
dispersing agent
mechanical properties
lap shear
conductivity
topic epoxy resin
ionic liquid
carbon nanotube
nanocomposite
curing agent
dispersing agent
mechanical properties
lap shear
conductivity
description Good dispersion of carbon nanotubes (CNTs) together with effective curing were obtained in epoxy/CNT nanocomposites (NCs) using three different ionic liquids (ILs). Compared to conventional amine-cured epoxy systems, lower electrical percolation thresholds were obtained in some of the IL-based epoxy systems. For example, the percolation threshold of the trihexyltetradecylphosphonium dicyanamide (IL-P-DCA)-based system was 0.001 wt.%. The addition of CNTs was not found to have any significant effect on the thermal or low-strain mechanical properties of the nanocomposites, but it did improve their adhesive properties considerably compared to the unfilled systems. This study demonstrates that ILs can be used to successfully replace traditional amine-based curing agents for the production of electrically conductive epoxy/CNT NCs and adhesives, as a similar or better balance of properties was achieved. This represents a step towards greater sustainability given that the vapor pressure of ILs is low, and the amount needed to effectively cure epoxy resins is significantly lower than any of their counterparts.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/60071
url http://hdl.handle.net/10810/60071
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO/MAT2017-84116-R/
https://www.mdpi.com/2079-4991/13/4/725
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
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