Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/22610

TítuloEffect of filler dispersion on the electromechanical response of epoxy/vapour grown carbon nanofiber composites
Autor(es)Ferreira, A.
Cardoso, Paulo
Klosterman, D.
Covas, J. A.
Hattum, F. W. J. van
Vaz, F.
Lanceros-Méndez, S.
Palavras-chavePolymer-matrix composites
Smart materials
Electrical properties
Piezoresistive
Data2012
EditoraIOP Publishing
RevistaSmart materials and structures
Resumo(s)The piezoresistive response of epoxy/vapour grown carbon nanofiber composites prepared by four different dispersion methods achieving different dispersion levels has been investigated. The composite response was measured as a function of carbon nanofiber loading for the different dispersion methods. Strain sensing by variation of the electrical resistance was tested through 4-point bending experiments, and the dependence of the gauge factor as a function of the deformation and velocity of deformation was calculated as well as the stability of the electrical response. The composites demonstrated an appropriate response for being used as a piezoresistive sensor. Specific findings were that the intrinsic piezoresistive response was only effective around the percolation threshold and that good cluster dispersion was more appropriate for a good piezoresistive response than a uniform dispersion of individual nanofibers. The applications limits of these materials for sensors applications are also addressed.
Tipoarticle
URIhttp://hdl.handle.net/1822/22610
DOI10.1088/0964-1726/21/7/075008
ISSN0964-1726
1361-665X
Versão da editorahttp://iopscience.iop.org/
Arbitragem científicayes
AcessorestrictedAccess
Aparece nas coleções:CDF - FCD - Artigos/Papers (with refereeing)
IPC - Artigos em revistas científicas internacionais com arbitragem

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