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Full elastic constitutive relation of non-isotropic aligned-CNT/PDMS flexible nanocomposites.
Nanoscale. 2013 Jun 07; 5(11):4847-54.N

Abstract

The elastic response of vertically aligned-carbon nanotube/polydimethylsiloxane (A-CNT/PDMS) nanocomposites is presented in this study and related to the underlying aligned-CNT morphology. Multiwalled 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 calorimetry (DSC), dynamic mechanical analysis (DMA) and tensile mechanical tests, and the full linearly elastic constitutive relation is established for such a PNC. The results suggest that the CNTs retain the alignment after wetting and curing of PDMS. PDMS is significantly modified by the reinforcing aligned-CNT fibers, demonstrating non-isotropic (as opposed to the isotropic neat PDMS) elastic properties all different from PDMS (Young's modulus of 0.8 MPa), including an anisotropy ratio of 4.8 and increases in the modulus of A-CNT/PDMS over PDMS by more than 900% and 100%, in the CNT 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-CNT PNCs are envisioned as elements in biomedical devices such as pressure transducers and energy harvesters.

Authors+Show Affiliations

Institute for Polymers and Composites/I3N, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal. xanasepulveda@dep.uminho.ptNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

23616092

Citation

Sepúlveda, A T., et al. "Full Elastic Constitutive Relation of Non-isotropic aligned-CNT/PDMS Flexible Nanocomposites." Nanoscale, vol. 5, no. 11, 2013, pp. 4847-54.
Sepúlveda AT, Guzman de Villoria R, Viana JC, et al. Full elastic constitutive relation of non-isotropic aligned-CNT/PDMS flexible nanocomposites. Nanoscale. 2013;5(11):4847-54.
Sepúlveda, A. T., Guzman de Villoria, R., Viana, J. C., Pontes, A. J., Wardle, B. L., & Rocha, L. A. (2013). Full elastic constitutive relation of non-isotropic aligned-CNT/PDMS flexible nanocomposites. Nanoscale, 5(11), 4847-54. https://doi.org/10.1039/c3nr00753g
Sepúlveda AT, et al. Full Elastic Constitutive Relation of Non-isotropic aligned-CNT/PDMS Flexible Nanocomposites. Nanoscale. 2013 Jun 7;5(11):4847-54. PubMed PMID: 23616092.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Full elastic constitutive relation of non-isotropic aligned-CNT/PDMS flexible nanocomposites. AU - Sepúlveda,A T, AU - Guzman de Villoria,R, AU - Viana,J C, AU - Pontes,A J, AU - Wardle,B L, AU - Rocha,L A, Y1 - 2013/04/24/ PY - 2013/4/26/entrez PY - 2013/4/26/pubmed PY - 2013/12/24/medline SP - 4847 EP - 54 JF - Nanoscale JO - Nanoscale VL - 5 IS - 11 N2 - The elastic response of vertically aligned-carbon nanotube/polydimethylsiloxane (A-CNT/PDMS) nanocomposites is presented in this study and related to the underlying aligned-CNT morphology. Multiwalled 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 calorimetry (DSC), dynamic mechanical analysis (DMA) and tensile mechanical tests, and the full linearly elastic constitutive relation is established for such a PNC. The results suggest that the CNTs retain the alignment after wetting and curing of PDMS. PDMS is significantly modified by the reinforcing aligned-CNT fibers, demonstrating non-isotropic (as opposed to the isotropic neat PDMS) elastic properties all different from PDMS (Young's modulus of 0.8 MPa), including an anisotropy ratio of 4.8 and increases in the modulus of A-CNT/PDMS over PDMS by more than 900% and 100%, in the CNT 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-CNT PNCs are envisioned as elements in biomedical devices such as pressure transducers and energy harvesters. SN - 2040-3372 UR - https://www.unboundmedicine.com/medline/citation/23616092/Full_elastic_constitutive_relation_of_non_isotropic_aligned_CNT/PDMS_flexible_nanocomposites_ L2 - https://doi.org/10.1039/c3nr00753g DB - PRIME DP - Unbound Medicine ER -