Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 101, Issue -, Pages 41-49Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2017.06.003
Keywords
Nanoparticles; Polymer-matrix composites (PMCs); Thermoplastic resin; Electrical properties
Funding
- National Natural Science Foundation [51603193, 11572290, 11432003]
- National Natural Science Foundation of China-Henan Province Joint Funds [U1604253]
- China Postdoctoral Science Foundation [2015M580637, 2016T90675]
- State Key Laboratory of Polymer Materials Engineering (Sichuan University) [sklpme2016-4-21]
- Special Science Foundation for Excellent Youth Scholars of Zhengzhou University [1421320041]
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Conductive elastomer composites based strain sensors have attracted increasing attention recently. In this paper, flexible composites were prepared by incorporating thermoplastic polyurethane (TPU) with zero-dimensional carbon black (CB) and one-dimensional carbon nanotubes (CNTs), respectively. CNTs/TPU showed a lower percolation threshold (0.28 wt.%) and wider sensing range (0-ca.135% strain), compared with CB/TPU (1.00 wt.% and 0-ca. 90% strain). CB/TPU composites exhibited a higher sensitivity with a GF of 10.8 under 20% strain, while CNTs/TPU showed a lower GF of 6.8. In cyclic loading unloading test, both the two composites showed non-monotonic 'shoulder peak' behaviors. For CB/TPU, the 'first peak' was higher than the 'second peak'; interestingly, CNTs/TPU presented a negative strain effect. The discrepancy was mainly ascribed to the difference of filler dimensionality and the evolution of the conductive network. (C) 2017 Elsevier Ltd. All rights reserved.
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