Journal
ACS APPLIED ELECTRONIC MATERIALS
Volume 4, Issue 6, Pages 3071-3079Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaelm.2c00471
Keywords
strain sensor; biaxial stretching; carbon nanotubes; thermoplastic polyurethane; nanocomposite
Funding
- National Natural Science Foundation of China [12102374, 52173301]
- Sichuan Science and Technology Program [2021YFH0031, 22JDGD0015, 2022YFH0019]
- Special Funded Postdoctoral Program of Sichuan Province [021609912]
- Innovative Research Team of Southwest Petroleum University [2017CXTD01]
- International Cooperation Project of Chengdu [2019-GH02-00054-HZ]
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This study produced a high-performance strain sensor using biaxially stretched carbon nanotubes (CNTs)/thermoplastic polyurethane (TPU) nanocomposites. The stretching process improved the crystallinity and sensing properties of the materials, and the 2.0 wt % CNT/TPU-1.5 strain sensor showed optimal performance.
Conductive polymer composites (CPCs) with good flexibility and electrical properties have attracted extensive concern for application in high-performance strain sensors. Here, a strain sensor with high performance was produced using biaxially stretched carbon nanotubes (CNTs)/thermoplastic polyurethane (TPU) nanocomposites. The results show that the biaxial stretching process enhanced the uniform dispersion and planar orientation of the CNTs, which improved the crystallinity of materials and the sensing property of the sensors. The optimal stretching ratios (SRs) of nanocomposites were also investigated. The 2.0 wt % CNT/TPU-1.5 strain sensor with a SR of 1.5 showed high sensitivity with a maximum gauge factor (GF) value of 16908.8, large detectable strain range (0-375%), and good cyclic stability (1000 cycles) and exhibited an application prospect in wearable devices.
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