Abstract
Soft robots and devices exploit highly deformable materials that are capable of changes in shape to allow conformable physical contact for controlled manipulation. While soft robots are resilient to mechanical impact, they are susceptible to mechanical damage, such as tears and punctures. The development of self‐healing materials and actuators continues to attract increasing interest, in particular, with respect to integrating self‐healing polymers to create bioinspired soft self‐healing devices. Herein, a novel piezoelectric‐driven self‐healing leaf‐motion mimic actuator is designed by combining a thermoplastic methyl thioglycolate–modified styrene–butadiene–styrene (MGSBS) elastomer with a piezoelectric macrofiber composite (MFC) for self‐sensing applications. This article is the first demonstration of a self‐sensing and self‐healing actuator‐sensor system, which is driven by a piezoelectric actuator and can mimic leaf motion. The leaf‐motion actuator combines built‐in dynamic sensing and room‐temperature self‐healing capabilities to restore macroscale cutting damage with an intrinsically high bandwidth of up to 10 kHz. The feasibility and potential of the new actuator for use in complex soft autonomous systems are demonstrated. These new results help to address the emerging influence of self‐healing soft actuators and the challenges of sensing, actuation, and damage resistance in soft robotics.
Highlights
Soft robots and devices exploit highly deformable materials that are capable of nature, low cost, ease of processing, changes in shape to allow conformable physical contact for controlled manipulation
Bao et al reported a self-healing polydimethylsiloxane that was crosslinked by coordination complexes to provide high strain, high dielectric strength, and large actuation
The materials expanded by 3.6% under a high applied actuator and generator applications due to their unique electric potential of 11 kV when used for artificial muscle
Summary
Www.advintellsyst.com undamaged MGSBS after three days, with potential for greater recovery over a more extended period. The phase angle approaches 0 due to a small degree of conductivity in the MGSBS. This can be observed as a frequencyindependent conductivity of the material (similar to a resistor, R, because conductivity is proportional to RÀ1). At higher frequencies (100 Hz), the phase approaches 90, because alternating current (AC) currents are flowing through the capacitive component of the MGSBS. This can be observed in the stronger frequency dependence of the AC conductivity in the higher frequency range (similar to a capacitor, C, because its AC conductivity is proportional to ωC)
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