Tensile piezoresistivity and disruption of percolation in singlewall and multiwall carbon nanotube/polyurethane composites
Carbon nanotube elastomeric composite films were fabricated by solution casting using singlewall and multiwall carbon nanotubes (SWCNTs and MWCNTs) and two thermoplastic-elastomers polymer matrices, an in-house synthesized segmented polyurethane and a commercial one. The CNTs are first characterized and the electrical conductivity, mechanical properties and piezoresistive response of the SWCNT and MWCNT composites with 8 wt% are evaluated. For both polymer matrices, the electrical conductivity of composites made from MWCNTs is higher than that achieved for composites made from SWCNTs. Evaluation of the strain–electrical resistance relationship of the composites shows a dependency of the piezoresistive sensitivity on the kind of CNT (SWCNT or MWCNT) and matrix electrical and mechanical properties. Above a specific strain threshold, electrical percolation is disrupted under tensile loading. The strain level at which this happens is larger for composites made with MWCNTs than for composites made with SWCNTs.
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dig-cicy-1003-1112016-10-24T18:02:38Z Tensile piezoresistivity and disruption of percolation in singlewall and multiwall carbon nanotube/polyurethane composites FRANCIS AVILES CETINA 2013-11-06 info:eu-repo/semantics/article Carbon nanotube elastomeric composite films were fabricated by solution casting using singlewall and multiwall carbon nanotubes (SWCNTs and MWCNTs) and two thermoplastic-elastomers polymer matrices, an in-house synthesized segmented polyurethane and a commercial one. The CNTs are first characterized and the electrical conductivity, mechanical properties and piezoresistive response of the SWCNT and MWCNT composites with 8 wt% are evaluated. For both polymer matrices, the electrical conductivity of composites made from MWCNTs is higher than that achieved for composites made from SWCNTs. Evaluation of the strain–electrical resistance relationship of the composites shows a dependency of the piezoresistive sensitivity on the kind of CNT (SWCNT or MWCNT) and matrix electrical and mechanical properties. Above a specific strain threshold, electrical percolation is disrupted under tensile loading. The strain level at which this happens is larger for composites made with MWCNTs than for composites made with SWCNTs. info:eu-repo/classification/cti/7 info:eu-repo/classification/cti/7 http://cicy.repositorioinstitucional.mx/jspui/handle/1003/111 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0 application/pdf |
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info:eu-repo/classification/cti/7 info:eu-repo/classification/cti/7 info:eu-repo/classification/cti/7 info:eu-repo/classification/cti/7 FRANCIS AVILES CETINA Tensile piezoresistivity and disruption of percolation in singlewall and multiwall carbon nanotube/polyurethane composites |
| description |
Carbon nanotube elastomeric composite films were fabricated by solution casting using singlewall
and multiwall carbon nanotubes (SWCNTs and MWCNTs) and two thermoplastic-elastomers polymer
matrices, an in-house synthesized segmented polyurethane and a commercial one. The CNTs are first
characterized and the electrical conductivity, mechanical properties and piezoresistive response of the
SWCNT and MWCNT composites with 8 wt% are evaluated. For both polymer matrices, the electrical
conductivity of composites made from MWCNTs is higher than that achieved for composites made from
SWCNTs. Evaluation of the strain–electrical resistance relationship of the composites shows a dependency
of the piezoresistive sensitivity on the kind of CNT (SWCNT or MWCNT) and matrix electrical and
mechanical properties. Above a specific strain threshold, electrical percolation is disrupted under tensile
loading. The strain level at which this happens is larger for composites made with MWCNTs than for
composites made with SWCNTs. |
| format |
info:eu-repo/semantics/article |
| topic_facet |
info:eu-repo/classification/cti/7 info:eu-repo/classification/cti/7 |
| author |
FRANCIS AVILES CETINA |
| author_facet |
FRANCIS AVILES CETINA |
| author_sort |
FRANCIS AVILES CETINA |
| title |
Tensile piezoresistivity and disruption of percolation in singlewall and multiwall carbon nanotube/polyurethane composites |
| title_short |
Tensile piezoresistivity and disruption of percolation in singlewall and multiwall carbon nanotube/polyurethane composites |
| title_full |
Tensile piezoresistivity and disruption of percolation in singlewall and multiwall carbon nanotube/polyurethane composites |
| title_fullStr |
Tensile piezoresistivity and disruption of percolation in singlewall and multiwall carbon nanotube/polyurethane composites |
| title_full_unstemmed |
Tensile piezoresistivity and disruption of percolation in singlewall and multiwall carbon nanotube/polyurethane composites |
| title_sort |
tensile piezoresistivity and disruption of percolation in singlewall and multiwall carbon nanotube/polyurethane composites |
| url |
http://cicy.repositorioinstitucional.mx/jspui/handle/1003/111 |
| work_keys_str_mv |
AT francisavilescetina tensilepiezoresistivityanddisruptionofpercolationinsinglewallandmultiwallcarbonnanotubepolyurethanecomposites |
| _version_ |
1756089199227830272 |