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https://hdl.handle.net/10216/108626
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DC Field | Value | Language |
---|---|---|
dc.creator | Sónia Carabineiro | |
dc.creator | P. Costa | |
dc.creator | J. Nunes-Pereira | |
dc.creator | J. Oliveira | |
dc.creator | J. Silva | |
dc.creator | J. Agostinho Moreira | |
dc.creator | J.G. Buijnsters | |
dc.creator | S. Lanceros-Mendez | |
dc.date.accessioned | 2022-09-07T19:47:57Z | - |
dc.date.available | 2022-09-07T19:47:57Z | - |
dc.date.issued | 2017 | |
dc.identifier.issn | 0266-3538 | |
dc.identifier.other | sigarra:228463 | |
dc.identifier.uri | https://hdl.handle.net/10216/108626 | - |
dc.description.abstract | 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 strain of 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 sigma approximate to 5 x 10(-11) S/m of pure PVDF to sigma approximate to 1 x 10(-2) Sim 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 approximate to 11 for deformations between 0.5 and 2 mm in 4-point bending experiments. These results demonstrate the suitability of the composites for strain sensing applications. | |
dc.language.iso | eng | |
dc.rights | restrictedAccess | |
dc.title | High-performance graphene-based carbon nanofiller/polymer composites for piezoresistive sensor applications | |
dc.type | Artigo em Revista Científica Internacional | |
dc.contributor.uporto | Faculdade de Engenharia | |
dc.identifier.doi | 10.1016/j.compscitech.2017.11.001 | |
dc.identifier.authenticus | P-00N-7F4 | |
Appears in Collections: | FEUP - Artigo em Revista Científica Internacional |
Files in This Item:
File | Description | Size | Format | |
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228463.pdf Restricted Access | Composites Science and Technology 2017, 153, 241-252 | 3.48 MB | Adobe PDF | Request a copy from the Author(s) |
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