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, Professor Shanmugam |
| 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 |
| ISSN (Online): | 1878-5840 |
| Published Online: | 19 July 2018 |
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