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9 April 2013 Improving dry carbon nanotube actuators by chemical modifications, material hybridization, and proper engineering
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Abstract
Low voltage, dry electrochemical actuators can be prepared by using a gel made of carbon nanotubes and ionic liquid.1 Their performance can be significantly improved by combining physical and chemical modifications with a proper engineering. We demonstrated that multi walled carbon nanotubes can be effectively used for actuators preparation;2 we achieved interesting performance improvements by chemically cross linking carbon nanotubes using both aromatic and aliphatic diamines;3 we introduced a novel hybrid material, made by in-situ chemical polymerization of pyrrole on carbon nanotubes, that further boosts actuation by taking advantage of the peculiar properties of both materials in terms of maximum strain and conductivity;4 we investigated the influence of actuator thickness showing that the generated strain at high frequency is strongly enhanced when thickness is reduced. To overcome limitations set by bimorphs, we designed a novel actuator in which a metal spring, embedded in the solid electrolyte of a bimorph device, is used as a non-actuating counter plate resulting in a three electrode device capable of both linear and bending motion. Finally, we propose a way to model actuators performance in terms of purely material-dependent parameters instead of geometry-dependent ones.5
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Maurizio Biso, Alberto Ansaldo, and Davide Ricci "Improving dry carbon nanotube actuators by chemical modifications, material hybridization, and proper engineering", Proc. SPIE 8687, Electroactive Polymer Actuators and Devices (EAPAD) 2013, 86871W (9 April 2013); https://doi.org/10.1117/12.2008696
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