Strong linear-piezoresistive-response of carbon nanostructures reinforced hyperelastic polymer nanocomposites
| Autor: | Muhamad F. Arif, Tejendra K. Gupta, Kartik M. Varadarajan, Shanmugam Kumar |
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| Rok vydání: | 2018 |
| Předmět: |
Nanocomposite
Materials science Polymer nanocomposite Percolation threshold 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Piezoresistive effect 0104 chemical sciences Hysteresis Mechanics of Materials Gauge factor Electrical resistivity and conductivity Hyperelastic material Ceramics and Composites Composite material 0210 nano-technology |
| Zdroj: | Composites Part A: Applied Science and Manufacturing. 113:141-149 |
| ISSN: | 1359-835X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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