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dc.contributor.authorCosta, P.por
dc.contributor.authorSilva, J.por
dc.contributor.authorAnsón-Casaos, A.por
dc.contributor.authorMartinez, M. T.por
dc.contributor.authorAbad, M. J.por
dc.contributor.authorViana, J. C.por
dc.contributor.authorLanceros-Méndez, S.por
dc.identifier.citationCosta, P., Silva, J., Ansón-Casaos, A., Martinez, M. T., Abad, M. J., Viana, J., & Lanceros-Mendez, S. (2014). Effect of carbon nanotube type and functionalization on the electrical, thermal, mechanical and electromechanical properties of carbon nanotube/styrene–butadiene–styrene composites for large strain sensor applications. Composites Part B: Engineering, 61, 136-146.por
dc.description.abstractThermoplastic elastomer tri-block copolymer, namely styrene–butadiene–styrene (SBS) composites filled with carbon nanotubes (CNT) are characterized with the main goal of obtaining electro-mechanical composites suitable for large deformation sensor applications. CNT/SBS composites with different filler contents and filler functionalizations are studied by morphological, thermal, mechanical and electrical analyses. It is shown that the different dispersion levels of CNT in the SBS matrix are achieved for pristine or functionalized CNT with strong influence in the electrical properties of the composites. In particular covalently functionalized CNTs show percolation thresholds higher than 8 weight percentage (wt%) whereas pristine CNT show percolation threshold smaller than 1 wt%. On the other hand, CNT functionalization does not alter the conduction mechanism which is related to hopping between the CNT for concentrations higher than the percolation threshold. Pristine single and multiwall CNT within the SBS matrix allow the preparation of composites with electro-mechanical properties appropriate for strain sensors for deformations up to 5% of strain, the gauge factor varying between 2 and 8. Composites close to the percolation threshold show larger values of the gauge factor.por
dc.description.sponsorshipThis work was supported by FEDER through the COMPETE Program and by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Project PEST-C/FIS/UI607/2011 and project PTDC/CTM-NAN/112574/2009. PC also thanks FCT for the SFRH/BD/64267/2009 Grants. The authors also thank funding from Matepro - Optimizing Materials and Processes", ref. NORTE-07-0124-FEDER-000037", co-funded by the "Programa Operacional Regional do Norte" (ON.2 - O Novo Norte), under the "Quadro de Referencia Estrategico Nacional" (QREN), through the "Fundo Europeu de Desenvolvimento Regional" (FEDER). Support from COST Actions MP1003 (European Scientific Network for Artificial Muscles, ESNAM) and MP0902 (Composites of Inorganic Nanotubes and Polymers, COINAPO) is also acknowledged. Thanks to Dynasol Elastomers, S.A (Spain) for supplying all SBS copolymer used in this work.
dc.subjectPolymer-matrix composites (PMCs)por
dc.subjectElectrical propertiespor
dc.subjectMechanical testingpor
dc.subjectA. Polymer-matrix composites (PMCs)por
dc.subjectB. Electrical propertiespor
dc.subjectD. Mechanical testingpor
dc.titleEffect of carbon nanotube type and functionalization on the electrical, thermal, mechanical and electromechanical properties of carbon nanotube/styrene-butadiene-styrene composites for large strain sensor applicationspor
oaire.citationTitleComposites Part B: Engineeringpor
dc.subject.wosScience & Technologypor
sdum.journalComposites Part B: Engineeringpor
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