Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/26644

TitleFull elastic constitutive relation of non-isotropic aligned-CNT/PDMS flexible nanocomposites
Author(s)Sepúlveda, A. T.
Villoria, R. Guzman
Viana, J. C.
Pontes, A. J.
Wardle, B. L.
Rocha, Luís A.
KeywordsCNTs
Nanocompositos
Issue date2013
PublisherRoyal Society of Chemistry
JournalNanoscale
Abstract(s)The elastic response of vertically aligned-carbon nanotubes/polydimethylsiloxane (A-CNTs/PDMS) nanocomposites are presented in this study and related to the underlying aligned-CNT morphology. Multiwall carbon nanotubes (MWCNTs) at 1% Vf are embedded in a flexible substrate of PDMS to create a flexible polymer nanocomposite (PNC). The PNC properties are evaluated using scanning electron microscopy (SEM), differential scanning calorymetry (DSC), dynamic mechanical analysis (DMA) and tensile mechanical tests, and the full linearly-elastic constitutive relation established for such a PNC. The results suggest that the CNTs retain alignment after the wetting and curing of the PDMS. The PDMS is significantly modified by the reinforcing aligned-CNT fibers, demonstrating non-isotropic (as opposed to the isotropic neat PDMS) elastic properties all different than the PDMS (Young´s modulus of 0.8 MPa), including an anisotropy ratio of 4.8 and increases in the modulus of A-CNTS/PDMS over PDMS by more than 900% and 100%, in the CNTs longitudinal and transverse directions, respectively. This study reports the first full constitutive relation that may be useful in modeling PNCs as composites or as elements of hierarchical nanoengineered composites, particularly PDMS-CNTs PNCs envisioned as elements in biomedical devices such as pressure transducers and energy harvesters.
Typearticle
URIhttp://hdl.handle.net/1822/26644
DOI10.1039/c3nr00753g
ISSN2040-3364
Publisher versionhttp://dx.doi.org/10.1039/c3nr00753g
Peer-Reviewedyes
AccessrestrictedAccess
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem

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