Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/48476
Título: | High-performance graphene-based carbon nanofiller/polymer composites for piezoresistive sensor applications |
Autor(es): | Costa, P. Nunes-Pereira, J. Oliveira, J. Silva, J. Moreira, J. Agostinho Carabineiro, S. A. C. Buijnsters, J.G. Lanceros-Méndez, S. |
Palavras-chave: | Functional composites Polymer-matrix composites (PMCs) Electrical properties Scanning electron microscopy (SEM) Casting |
Data: | Dez-2017 |
Editora: | Elsevier |
Revista: | Composites Science and Technology |
Citação: | Costa, P., Nunes-Pereira, J., Oliveira, & et.al. (2017). High-performance graphene-based carbon nanofiller/polymer composites for piezoresistive sensor applications. Composites Science and Technology, 153, 241-252 |
Resumo(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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/48476 |
DOI: | 10.1016/j.compscitech.2017.11.001 |
ISSN: | 0266-3538 |
Versão da editora: | https://www.sciencedirect.com/science/article/pii/S0266353817322297 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FCD - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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3.pdf Acesso restrito! | 1,48 MB | Adobe PDF | Ver/Abrir |