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Abstract:
Compliant sensors have drawn considerable interests in human-robot interactions. However, it is still challenging to obtain reliable and reproducible performance at reduced costs, especially for scaled-up sensing applications. This work investigates the piezoresistive performance of a low-cost, scalable sensor, which is made by spray coating exfoliated graphite natural rubber latex composites (EG/latex) over an elastomeric substrate. The EG/latex sensor provides a uniform distribution in the sheet resistance (variation below 4%) over a large 10 cm x 10 cm area. The stabilized piezoresistive response under cyclic tests is found highly related to both the filler concentration and the strain region. The 8 wt% and the 10 wt% sensors show nonlinear piezoresistive response, while the 25 wt% sensor exhibits the best linearity with a high gauge factor (7.6) and the lowest hysteresis (0.043) under a maximum strain of 60%. The distinct piezoresistive behavior is found attributed to the different levels of microbreakage under the applied strain. Scalable sensing performance is demonstrated on a hand-size glove spray-coated with 25 wt% EG/latex. Effective localization of contacts over the continuous sensing glove is achieved via the technique of electrical impedance tomography, validating the potential of the cost-competitive EG/latex sensor for scalable sensing applications.
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PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
ISSN: 1862-6300
Year: 2023
Issue: 19
Volume: 220
2 . 0 0 0
JCR@2022
ESI Discipline: PHYSICS;
ESI HC Threshold:17
Cited Count:
SCOPUS Cited Count: 2
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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