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

TitleHigh-performance graphene-based carbon nanofiller/polymer composites for piezoresistive sensor applications
Author(s)Costa, P.
Nunes-Pereira, J.
Oliveira, J.
Silva, J.
Moreira, J. Agostinho
Carabineiro, S. A. C.
Buijnsters, J.G.
Lanceros-Méndez, S.
KeywordsFunctional composites
Polymer-matrix composites (PMCs)
Electrical properties
Scanning electron microscopy (SEM)
Issue dateDec-2017
JournalComposites Science and Technology
CitationCosta, P., Nunes-Pereira, J., Oliveira, & (2017). High-performance graphene-based carbon nanofiller/polymer composites for piezoresistive sensor applications. Composites Science and Technology, 153, 241-252
Abstract(s)Poly(vinylidene fluoride) (PVDF) composites with different carbonaceous nanofillers, prepared by solution casting, were studied their chemical, mechanical, electrical and electro-mechanical properties evaluated. Few-layer graphene (FLG) nanoplatelets (G-NPL), graphene oxide (GO) and reduced graphene oxide (rGO) and single-walled carbon nanohorns (SWCNH)) were found to have a strong influence in the overall properties of the composites prepared with up to 5 wt% nanofiller contents. The mechanical strainof carbonaceous nanofillers/PVDF composites decreases from 15% to near 5% of maximum strain. The electrical percolation threshold depends on the nanofiller type, being below 1 wt% for rGO and near 2 wt% for the remaining nanofillers. The electrical conductivity shows a maximum increase of nine orders of magnitude, from σ ≈ 5×10-11 S/m of pure PVDF to σ ≈ 1×10-2 S/m for rGO/PVDF composites with 5 wt% nanofillers, the conduction mechanism being related to hopping between the carbonaceous nanofillers for concentrations higher than the percolation threshold. Furthermore, the composites show electro-mechanical properties, except for G-NPL materials, with rGO/PVDF composites with 5 wt% nanofiller content showing higher Gauge factor (GF) values, reaching GF≈ 11 for deformations between 0.5 and 2mm in 4-point bending experiments. These results demonstrate the suitability of the composites for strain sensing applications.
Publisher version
AccessRestricted access (UMinho)
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

Files in This Item:
File Description SizeFormat 
  Restricted access
1,48 MBAdobe 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