Novel linear, piezoresistive, auxetic sensors coated by AAA battery active carbons with supreme sensitivity for human body movement detection

Taherkhani, B, Bodaghi, M ORCID: https://orcid.org/0000-0002-0707-944X, Rahmani, S and Mesgari, F, 2023. Novel linear, piezoresistive, auxetic sensors coated by AAA battery active carbons with supreme sensitivity for human body movement detection. Advanced Engineering Materials: 2300524. ISSN 1438-1656

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Abstract

Herein, a novel strategy for creating low-cost, sustainable, piezoresistive auxetic sensors using the active carbon in consumed AAA batteries, promoting a circular economy, is presented. An auxetic structure with a fixed Poisson's ratio during the strain is designed for sensing. The sensor substrate is silicone RTV2, and the sensing element is the active carbon in AAA batteries chopped to microscale particles using an ultrasonic wave. The sensor mold is designed using Solidworks software and produced using a computer numerical control device and EdgeCam2014 software. The coating process is performed by spraying the prepared particles on the molded auxetic structure and putting the coated auxetic structure under ultraviolet ray to prepare the final sensor. Sensitivity tests are performed, and the results show that the proposed sensor has a better sensitivity of about 1000% and 410% than the previous mixed and layered composite auxetic counterparts. The proposed sensor has linear sensitivity during the strain (estimated with a line with a slope of 0.64) while previous ones have a nonlinear performance (estimated at least with two lines). The sustainable sensor is implemented to detect the movements of the human body, including the movements of the wrist, finger, elbow, and forearm.

Item Type:	Journal article
Publication Title:	Advanced Engineering Materials
Creators:	Taherkhani, B., Bodaghi, M., Rahmani, S. and Mesgari, F.
Publisher:	Wiley
Date:	21 June 2023
ISSN:	1438-1656
Identifiers:	Number Type 10.1002/adem.202300524 DOI 1791809 Other
Divisions:	Schools > School of Science and Technology
Record created by:	Jonathan Gallacher
Date Added:	17 Aug 2023 15:48
Last Modified:	17 Aug 2023 15:48
URI:	https://irep.ntu.ac.uk/id/eprint/49581

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