Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5439385 | Composites Part A: Applied Science and Manufacturing | 2017 | 35 Pages |
Abstract
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 (0.28Â wt.%) and wider sensing range (0-ca.135% strain), compared with CB/TPU (1.00Â 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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yanjun Zheng, Yilong Li, Kun Dai, Mengran Liu, Kangkang Zhou, Guoqiang Zheng, Chuntai Liu, Changyu Shen,