Please use this identifier to cite or link to this item:

TitlePiezoresistive polypropylene-carbon nanofiber composites as mechanical transducers
Author(s)Rocha, J. G.
Paleo, A. J.
Hattum, F. W. J. van
Lanceros-Méndez, S.
KeywordsPiezoresistive devices
Strain measurement
Mechanical sensors
Issue date2012
JournalMicrosystem Technologies
Abstract(s)Abstract: polymeric materials have been replacing other materials in various applications, from structural to electronic components. In particular, since the discovery of conducting polymers and the beginning of the manufacture of conducting composites with carbon fillers, their use in electronics is growing up. A group of electronic components with large potential for industrial applications such as structural monitoring, biomedical or robotics are sensors based on the piezoresistive effect, fabricated from conductive polymers and/or composites. The aim of this article is to characterize the piezoresistive effect of conductive polymer composites based on polypropylene filled with carbon nanofibers, and to demonstrate a way of fabricating strain gauges from these materials, using industrial techniques. With this purpose, some films were prepared by shear extrusion, which allows the composites to be produced industrially in a standard non-expensive process. Then, both the dependence of the electrical response on the preparation conditions and on the mechanical solicitations was measured. The obtained gauge factor values, up to 2.5, and piezoresistive coefficients up to 0.0019 mm2/N, prove the viability of these materials for fabricating strain-gauges, where their main advantages are the lower price and the ability to deal with much higher deformations, when compared to metal or semiconductor strain-gauges.
Publisher version
AccessRestricted access (UMinho)
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

Files in This Item:
File Description SizeFormat 
  Restricted access
593,57 kBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID