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  4. Full polymer dielectric elastomeric actuators (DEA) functionalised with carbon nanotubes and high-K ceramics
 
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2016
Journal Article
Title

Full polymer dielectric elastomeric actuators (DEA) functionalised with carbon nanotubes and high-K ceramics

Abstract
Dielectric elastomer actuators (DEA) are special devices which have a simple working and construction principle and outstanding actuation properties. The DEAs consist of a combination of different materials for the dielectric and electrode layers. The combination of these layers causes incompatibilities in their interconnections. Dramatic differences in the mechanical properties and bad adhesion of the layers are the principal causes for the reduction of the actuation displacement and strong reduction of lifetime. Common DEAs achieve actuation displacements of 2% and a durability of some million cycles. The following investigations represent a new approach to solving the problems of common systems. The investigated DEA consists of only one basic raw polymer, which was modified according to the required demands of each layer. The basic raw polymer was modified with single-walled carbon nanotubes or high-k ceramics, for example, lead magnesium niobate-lead titanate. The development of the full polymer DEA comprised the development of materials and technologies to realise a reproducible layer composition. It was proven that the full polymer actuator worked according to the theoretical rules. The investigated system achieved actuation displacements above 20% regarding thickness, outstanding interconnections at each layer without any failures, and durability above 3 million cycles without any indication of an impending malfunction.
Author(s)
Köckritz, Tilo
TU Dresden
Luther, René
TU Dresden
Paschew, Georgi
TU Dresden
Jansen, Irene
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Richter, Andreas
TU Dresden
Jost, Oliver
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Schönecker, Andreas
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Beyer, Eckhard
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Journal
Micromachines  
Project(s)
Candela
Funder
Bundesministerium für Bildung und Forschung BMBF (Deutschland)  
Open Access
Link
Link
DOI
10.3390/mi7100172
Additional full text version
Landing Page
Language
English
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Keyword(s)
  • electroactive polymers

  • sensors

  • actuators

  • conductive polymers

  • technologies for polymeric microsystems

  • full polymer actuator

  • electromechanical characterization

  • polydimethylsiloxane

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