Dielectric elastomer fiber actuators: empirical studies and simulations

Dielectric elastomer fiber actuators revolutionized artificial muscle development by utilizing DEA’s films efficiency, scalability and versatility in fiber geometry. Slicone-based fibers present high potential in reshaping actuation technology’s future due to unique softness and ease of production. We demonstrate polydimethylsiloxane fiber actuators produced using a photocurable reaction in a wet-spinning process. The hollow fiber’s size is controlled by varying flow rates, spinning head size and bath medium, enabling the fabrication of homogenous fibers with diameters of 300-2000 µm and wall thicknesses of 60–200 µm. The fiber’s robustness is assessed by correlating the curing conditions with rheological data, collected using the UV curing accessory. The fiber actuator is prepared by co-extruding or injecting the inner electrode and dip-coating the outer electrode. Various electrode materials, including conductive silicone composites, are investigated. The optimal fiber geometry is simulated, increasing the actuator’s reliability and allowing future incorporation into soft wearables.