Stretchable composite monolayer electrodes for low voltage dielectric elastomer actuators
By Ji, Xiaobin; Haitami, Alae El; Sorba, Francesca; Rosset, Samuel; Nguyen, Giao T. M.; Plesse, C
Published in Sensors and Actuators B: Chemical
2018
Abstract
In this work, a Multiwalled Carbon Nanotube/poly(alkylthiophene) (MWCNT/PT) composite is developed as the electrodes for dielectric elastomer actuators (DEAs) using the Langmuir-Schaefer (LS) method. These composites form stable monolayers at the air-water interface that can then be LS transferred onto a poly(dimethylsiloxane) (PDMS) elastomer membrane. The monolayer electrode remains conductive up to uniaxial strain. We present a method to fabricate DEAs using the LS transferred electrodes. By using a mask during the transfer step, the electrodes can be patterned with better than 200 ?m resolution on both sides of a 1.4 ?m-thick pre-stretched PDMS membrane to produce an ultra-low voltage DEA. The DEA generates 4.0% linear strain at an actuation voltage of 100 V, an order of magnitude lower than the typical DEA operating voltage.
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