Multi-Stimulus Soft Actuators from Aerosol Jet Printed MXene-Cellulose Composite.
basic_science · Level V
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- Record sourced from PubMed, PMID 41115421.
- Also identified by DOI 10.1021/acs.nanolett.5c03256.
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Abstract
The evolution of next-generation flexible, stretchable, and conformal microrobotics hinges significantly on advances in fabrication methods. There is a need to enhance the scalability of actuator feature dimensions and to increase the design versatility. This study demonstrates the additive manufacturing of soft multi-stimulus thermomechanical actuators based on a composite of transition metal carbide (TMC, MXene) and cellulose nanofiber (CNF) nanomaterials using aerosol jet printing (AJP) for scalable/customizable actuation. Aqueous MXene-CNF films with tunable electrothermal and photothermal properties were printed onto polycarbonate (PC) membranes for wired and/or wireless operation, having full reversibility with induced heating below 120 °C. Printed devices as small as 5 mm<sup>2</sup> and 2.5 mm<sup>2</sup> yielded sharp curvatures of 0.92 cm<sup>-1</sup> and 0.87 cm<sup>-1</sup>, respectively. By printing MXene-CNF to select regions on both sides of the substrate, complex actuation modes were realized with directional, reversible control. This work highlights the promise of AJP-fabricated MXene-CNF systems for soft robotics applications.