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High‐Resolution Printed Ethylene Vinyl Acetate Based Strain Sensor for Impact Sensing

Authors :
Pariya Nazari
Johannes Zimmermann
Christian Melzer
Wolfgang Kowalsky
Jasmin Aghassi‐Hagmann
Gerardo Hernandez‐Sosa
Uli Lemmer
Source :
Advanced Sensor Research, Vol 3, Iss 7, Pp n/a-n/a (2024)
Publication Year :
2024
Publisher :
Wiley-VCH, 2024.

Abstract

Abstract The strongly growing interest in digitalizing society requires simple and reliable strain‐sensing concepts. In this work, a highly sensitive stretchable sensor is presented using a straightforward and scalable printing method. The piezoresistive sensor consists of conductive core–shell microspheres embedded in an elastomer. As the elastomer, ethylene vinyl acetate (EVA) is employed as an efficient and cost‐effective alternative compared to polydimethylsiloxane (PDMS). EVA allows for a significantly lower percolation threshold and low hysteresis compared with PDMS. Using 35 µm microspheres, a detection limit of 0.01% is achieved. When using 4 µm microspheres, the sensor shows a detection limit of 0.015% and electromechanical robustness against 1000 cycles of 0–1% strain. The stretchable strain sensor is successfully implemented as an impact sensor and a diaphragm expansion monitoring sensor. Fast (20 ms) and high‐resolution response as well as mechanical robustness to strain values greater than the linear working range of the sensor are demonstrated. The results of this research indicate the promising potential of employing conductive microspheres embedded in the EVA matrix for fast and precise strain detection applications.

Details

Language :
English
ISSN :
27511219
Volume :
3
Issue :
7
Database :
Directory of Open Access Journals
Journal :
Advanced Sensor Research
Publication Type :
Academic Journal
Accession number :
edsdoj.b8aaafdd35444049e83ac84be4e0555
Document Type :
article
Full Text :
https://doi.org/10.1002/adsr.202300189