Strong linear-piezoresistive-response of carbon nanostructures reinforced hyperelastic polymer nanocomposites

Arif, M. F., Kumar, S., Gupta, T. K. and Varadarajan, K. M. (2018) Strong linear-piezoresistive-response of carbon nanostructures reinforced hyperelastic polymer nanocomposites. Composites Part A: Applied Science and Manufacturing, 113, pp. 141-149. (doi: 10.1016/j.compositesa.2018.07.021)

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Abstract

Here, we report highly strain-tolerant and sensitive strain sensors based on carbon nanostructures (CNS)-polydimethylsiloxane (PDMS) nanocomposites. CNS consist of clusters of aligned multiwall carbon-nanotubes (MWCNT) with high degree of entanglement and wall sharing between nanotubes. The unique features of CNS result in nanocomposites with very low electrical percolation threshold (0.05 wt% CNS), strong linear-piezoresistive-response up to 110% strain, and high sensitivity with gauge factor ranging from 8 to 47. We also present a simple analytical model for predicting resistivity evolution as a function of stretch considering incompressible hyperelastic behavior of CNS/PDMS nanocomposites. CNS/PDMS nanocomposites also show good hysteresis performance and stability up to 100 repetitive stretch/release cycles for 30% maximum strain. Tunable sensitivity and linear piezoresistivity coupled with high stretchability of CNS/PDMS nanocomposites demonstrated here suggest their potential for applications in wearable health and fitness monitoring devices.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Kumar, Dr Shan
Authors: Arif, M. F., Kumar, S., Gupta, T. K., and Varadarajan, K. M.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Composites Part A: Applied Science and Manufacturing
Publisher:Elsevier
ISSN:1359-835X
Published Online:19 July 2018

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