Comprehensive evaluation of the piezoresistive behavior of carbon nanotube-based composite strain sensors

Tang, Zhen-Hua and Li, Yuan-Qing and Huang, Pei and Wang, Hao and Hu, Ning and Fu, Shao-Yun (2021) Comprehensive evaluation of the piezoresistive behavior of carbon nanotube-based composite strain sensors. Composites Science and Technology, 208:108761. pp. 1-8. ISSN 0266-3538


Abstract

Theoretical analysis of the piezoresistive behavior of carbon nanotube (CNT)-based composites is of great importance for understanding the electro-mechanical response of CNT-based composite strain sensors. In this paper, a comprehensive analytical model is developed to predict the electro-mechanical response of conductive CNT-based composite sensors by considering some critical factors, such as CNT dimensions, interphase, nanotube waviness, and dispersion state. To acheive this, stretching-induced changes in electrical resistance are characterized in the model by the variation of CNT content, CNT orientation, and percolated conductive networks. Then the effects of these key factors are systematically examined on the piezoresistive response of CNT-based composite strain sensors and found to play important roles in determining the sensitivity. Moreover, comparisons between modelling predictions and existing numerical and experimental data are made to demonstrate the validity of the developed model. The developed model highlights the physical mechanism and takes full consideration of the key parameters, which can help to gain a deeper understanding of the piezoresistive behavior of CNT-based composite sensors compared with existing modellings. Finally, a meaningful recommendation is made to optimize the design of highly sensitive CNT-based composite sensors.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 07 Mar 2022 23:34
Last Modified: 30 Mar 2022 05:14
Uncontrolled Keywords: Carbon nanotube; Modelling; Piezoresistive behavior; Strain sensor
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering
Identification Number or DOI: https://doi.org/10.1016/j.compscitech.2021.108761
URI: http://eprints.usq.edu.au/id/eprint/46359

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