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Research Article | Open Access

Significant strain-rate dependence of sensing behavior in TiO2@carbon fibre/PDMS composites for flexible strain sensors

Fan ZHANGaHailong HUb,c( )Simin HUbJianling YUEb
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
School of Aeronautics & Astronautics, Central South University, Changsha 410083, China
Research Center in Intelligent Thermal Structures for Aerospace, Central South University, Changsha 410083, China
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Abstract

Carbon fibre (CF) embedded into elastomeric media has been attracting incredible interest as flexible strain sensors in the application of skin electronics owing to their high sensitivity in a very small strain gauge. To further improve the sensitivity of CF/PDMS composite strain sensor, the relatively low temperature prepared TiO2 nanowire via hydrothermal route was employed herein to functionalize CF. The results showed a significant increase in the sensitivity of the TiO2@CF/PDMS composite strain sensors which was reflected by the calculated gauge factor. As the prepared TiO2 nanowire vertically embraced the surroundings of the CF, the introduced TiO2 nanowire contributed to a highly porous structure which played a predominant role in improving the sensitivity of strain sensors. Moreover, the significant strain rate dependent behavior of TiO2@CF/PDMS strain sensor was revealed when performing monotonic tests at varied strain rate. Therefore, introducing TiO2 nanowire on CF offers a new technique for fabricating flexible strain sensors with improved sensitivity for the application of flexible electronics.

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Journal of Advanced Ceramics
Pages 1350-1359
Cite this article:
ZHANG F, HU H, HU S, et al. Significant strain-rate dependence of sensing behavior in TiO2@carbon fibre/PDMS composites for flexible strain sensors. Journal of Advanced Ceramics, 2021, 10(6): 1350-1359. https://doi.org/10.1007/s40145-021-0509-7

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Received: 15 February 2021
Revised: 03 June 2021
Accepted: 24 June 2021
Published: 27 September 2021
© The Author(s) 2021

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