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A flexible strain sensor based on conductive TPU/CNTs-Gr composites

zhang, Y; Li, C; Zhou, B; He, H; Zhou, Y; Jiang, L; Zhou, FL; (2022) A flexible strain sensor based on conductive TPU/CNTs-Gr composites. Journal of Applied Polymer Science , 139 (27) , Article e52475. 10.1002/app.52475. Green open access

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Abstract

A flexible strain sensor with excellent mechanical and electrical properties was fabricated by depositing carboxylated multiwalled carbon nanotubes (CNTs) and graphene (Gr) onto thermoplastic polyurethane (TPU) nanofibrous membranes. The deposition efficiency and fastness of CNTs and Gr particles on TPU nanofibrous membranes were improved by vacuum assisted deposition and ultrasonication. Furthermore, a flexible strain sensor with excellent sensing performance was obtained by optimizing the optimal hybrid ratio between CNTs and Gr. Electromechanical experiments showed that the strain sensor had a wide working range of 172% with a high-gauge factor of approximately 217 for TPU/5CNTs5Gr composite. Moreover, the TPU/5CNTs5Gr composite also exhibited good durability in 10,000 tensile loading-unloading cycles, and had superior sensing performance when monitoring the bending motions of human finger, elbow and knee.

Type: Article
Title: A flexible strain sensor based on conductive TPU/CNTs-Gr composites
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/app.52475
Publisher version: https://doi.org/10.1002/app.52475
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
Keywords: conductive polymers, sensitivity, strain sensors, working range
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
URI: https://discovery.ucl.ac.uk/id/eprint/10150596
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