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Engineering of Carbon Nanotube/Polydimethylsiloxane Nanocomposites with Enhanced Sensitivity for Wearable Motion Sensors

Abstract

Nanocomposite based wearable strain sensors hold promise for a variety of applications from human body motion detection to soft robotics. However, to improve the sensitivity of strain sensors while keep their stretchability (i.e., strain detection range) is still the grand challenge in this area. In this research, a highly efficient and scalable method was developed to enhance the sensitivity of the strain sensor based on carbon nanotube/polydimethylsiloxane (CNT/PDMS) nanocomposites. Through the introduction of porosity into the nanocomposites to form CNT/PDMS sponges using citric acid monohydrate particles, the sensitivity (GF=15, strain (ε)>15%; GF=1.1, ε<15%) is improved compared to the CNT/PDMS nanocomposites without porous structure (GF=3.2, ε>10%; GF=0.12, ε<10%). The strain sensor based on the CNT/PDMS sponge not only shows the capability of monitoring human body motion such as bending of finger and elbow, speaking, drinking, and breathing, but also demonstrates the potential application in soft robotics such as detection of the actuation of a dielectric elastomer.

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Publication details

The article was received on 31 Jul 2017, accepted on 10 Oct 2017 and first published on 13 Oct 2017


Article type: Paper
DOI: 10.1039/C7TC03434B
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Engineering of Carbon Nanotube/Polydimethylsiloxane Nanocomposites with Enhanced Sensitivity for Wearable Motion Sensors

    Q. Li, J. Li, D. Tran, C. Luo, Y. Gao, C. Yu and F. Xuan, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03434B

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