Electroactive polymer actuators

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Authors
  1. Leidner, J.
  2. Hacker, D.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Bodycote Ortech Lab, Mississauga ONT (CAN)
Abstract
A voltage potential applied across a thin, non-conducting, elastomeric membrane results in the attraction of two charged surfaces, compression of the elastomer and a resulting increase in its length. Devices based on this concept have been claled dielectric actuators. This report presents results of preliminary work to fabricate and characterize dielectric polymer actuators, as well as a simple theoretical model of their behaviour. Dielectric actuators based on cast thermoplastic polyurethane films were prepared with brushed-on graphite powder as electrodes. Strains of up to around two percent were measured. This strain corresponds to a stress of approximately 150 kPa. The voltage/strain relationship followed a parabolic relationship as predicted by theoretical considerations. Acutators with similar strain values were prepared by forming longer films and rolling them into tubes.

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Keywords
Dielectric actuators;Electroactive polymers
Report Number
DREA-CR-2001-053 — Contractor Report
Date of publication
01 May 2001
Number of Pages
48
DSTKIM No
CA012047
CANDIS No
516643
Format(s):
Hardcopy;Document Image stored on Optical Disk

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