Sensing of Large Strain Using Multiwall Carbon Nanotube/Segmented Polyurethane Composites

Multiwall carbon nanotube (MWCNT)/elastomeric composite films were fabricated using two segmented polyurethanes: an in-house synthesized one (SPU) and a commercial medical grade one (TecoflexVR , TF). Electrical, mechanical, and electromechanical (piezoresistive) properties of both composites were e...

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Autor: FRANCIS AVILES CETINA
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:México
Institución:Centro de Investigación Científica de Yucatán
Repositorio:Repositorio Institucional CICY
OAI Identifier:oai:cicy.repositorioinstitucional.mx:1003/101
Acceso en línea:http://cicy.repositorioinstitucional.mx/jspui/handle/1003/101
Access Level:acceso abierto
Palabra clave:info:eu-repo/classification/cti/7
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spelling Sensing of Large Strain Using Multiwall Carbon Nanotube/Segmented Polyurethane CompositesFRANCIS AVILES CETINAinfo:eu-repo/classification/cti/7info:eu-repo/classification/cti/7Multiwall carbon nanotube (MWCNT)/elastomeric composite films were fabricated using two segmented polyurethanes: an in-house synthesized one (SPU) and a commercial medical grade one (TecoflexVR , TF). Electrical, mechanical, and electromechanical (piezoresistive) properties of both composites were evaluated as a function of the MWCNT weight concentration (1–10 wt %). An increase in electrical conductivity for both types of polymers was observed for MWCNT concentrations as low as 1 wt %. The electrical conductivity of MWCNT/TF composites was higher than that achieved for MWCNT/SPU composites. Mechanical properties of 8 wt % MWCNT/SPU composites showed a threefold increase in stiffness compared to neat SPU. The changes in electrical resistance of the composites showed higher sensitivity to strain for lower MWCNT concentrations. The piezoresistive signal of the composites allows to measure strains up to 400% before electrical depercolation occurs. The strain at which electrical depercolation occurs depends on the conductivity of the composite in its unloaded state. This kind of composites may find sensing applications in prosthetics, biomedical devices, and smart textiles.2013-03-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://cicy.repositorioinstitucional.mx/jspui/handle/1003/101reponame:Repositorio Institucional CICYinstname:Centro de Investigación Científica de Yucatáninstacron:CICYinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0oai:cicy.repositorioinstitucional.mx:1003/1012024-08-28T03:18:24Z
dc.title.none.fl_str_mv Sensing of Large Strain Using Multiwall Carbon Nanotube/Segmented Polyurethane Composites
title Sensing of Large Strain Using Multiwall Carbon Nanotube/Segmented Polyurethane Composites
spellingShingle Sensing of Large Strain Using Multiwall Carbon Nanotube/Segmented Polyurethane Composites
FRANCIS AVILES CETINA
info:eu-repo/classification/cti/7
info:eu-repo/classification/cti/7
title_short Sensing of Large Strain Using Multiwall Carbon Nanotube/Segmented Polyurethane Composites
title_full Sensing of Large Strain Using Multiwall Carbon Nanotube/Segmented Polyurethane Composites
title_fullStr Sensing of Large Strain Using Multiwall Carbon Nanotube/Segmented Polyurethane Composites
title_full_unstemmed Sensing of Large Strain Using Multiwall Carbon Nanotube/Segmented Polyurethane Composites
title_sort Sensing of Large Strain Using Multiwall Carbon Nanotube/Segmented Polyurethane Composites
dc.creator.none.fl_str_mv FRANCIS AVILES CETINA
author FRANCIS AVILES CETINA
author_facet FRANCIS AVILES CETINA
author_role author
dc.subject.none.fl_str_mv info:eu-repo/classification/cti/7
info:eu-repo/classification/cti/7
topic info:eu-repo/classification/cti/7
info:eu-repo/classification/cti/7
description Multiwall carbon nanotube (MWCNT)/elastomeric composite films were fabricated using two segmented polyurethanes: an in-house synthesized one (SPU) and a commercial medical grade one (TecoflexVR , TF). Electrical, mechanical, and electromechanical (piezoresistive) properties of both composites were evaluated as a function of the MWCNT weight concentration (1–10 wt %). An increase in electrical conductivity for both types of polymers was observed for MWCNT concentrations as low as 1 wt %. The electrical conductivity of MWCNT/TF composites was higher than that achieved for MWCNT/SPU composites. Mechanical properties of 8 wt % MWCNT/SPU composites showed a threefold increase in stiffness compared to neat SPU. The changes in electrical resistance of the composites showed higher sensitivity to strain for lower MWCNT concentrations. The piezoresistive signal of the composites allows to measure strains up to 400% before electrical depercolation occurs. The strain at which electrical depercolation occurs depends on the conductivity of the composite in its unloaded state. This kind of composites may find sensing applications in prosthetics, biomedical devices, and smart textiles.
publishDate 2013
dc.date.none.fl_str_mv 2013-03-16
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://cicy.repositorioinstitucional.mx/jspui/handle/1003/101
url http://cicy.repositorioinstitucional.mx/jspui/handle/1003/101
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositorio Institucional CICY
instname:Centro de Investigación Científica de Yucatán
instacron:CICY
instname_str Centro de Investigación Científica de Yucatán
instacron_str CICY
institution CICY
reponame_str Repositorio Institucional CICY
collection Repositorio Institucional CICY
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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