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16 July 2001 Fully dry solid state artificial muscles exhibiting giant electromechanical effect
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This paper deals with the discovery of giant low voltage electromechanical actuation and sensing effects in an electroactive polymer composite made with a composite of poly(ethylene oxide), PEO, and poly(ethylene glycol), PEG. The experimental observations and robust performance of the new solid-state polymer actuators and sensors in the form of a strip, which is suitably surface-electroded and cation- doped, are reported herein. Recent laboratory discovery shows that such solid-state actuators are polymeric materials capable of exhibiting large motion actuation capabilities (>2% strain) in a low electric field imposed across the strip (<10 V/mm) with considerable stress (>10MPa) and fast responses (>10Hz). Moreover, a stable operation over ten million's of cycles in air is achieved with nearly no performance degradation. Also, by bending the strip, a voltage is produced across the thickness of the strip showing direct mechanoelectric behaviors that can be used in polymeric sensors either dynamically or quasi- statically. It must be pointed out that effectively constructed solid-state polymer sensors and actuators overcome many inherent problems that other state-of-the-art polymer sensors and actuators have, such as rate limiting dopant intercalation of conducting polymers, high voltage requirement of ferroelectric polymers, favored wet conditions for ionic polymer metal composites, and poor mechanical properties of ionic polymeric gels. Therefore, the reported solid-state polymer actuators and sensors show a tremendous potential for use in biomimetic/medical, industrial, and domestic applications superior to any other polymer materials identified so far.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mohsen Shahinpoor and Kwang J. Kim "Fully dry solid state artificial muscles exhibiting giant electromechanical effect", Proc. SPIE 4329, Smart Structures and Materials 2001: Electroactive Polymer Actuators and Devices, (16 July 2001);

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