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Matrix stiffness dependent electro-mechanical response of dipole grafted silicones

  • The properties of dielectric elastomer actuators can be optimized by modifying the dielectric or mechanical properties of the dielectric elastomer. This paper presents the simultaneous control of both dielectric and mechanical properties, in a silicone elastomer network comprising cross-linker, chains and grafted molecular dipoles. Chains with two different molecular weights were each combined with varying amounts of grafted dipole. Chemical and physical characterization showed that networks with stoichiometric control of cross-linking density and permittivity were obtained, and that longer chain lengths resulted in higher electrical field response due to the reduction in cross-linking density and correspondingly in mechanical stiffness. Both actuation sensitivities were enhanced by 6.3 and 4.6 times for the short and long chain matrix material, respectively.

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Author:Björn Kussmaul, Sebastian Risse, Michael WegenerORCiDGND, Guggi Kofod, Hartmut Krüger
Parent Title (English):Smart materials and structures
Publisher:IOP Publ. Ltd.
Place of publication:Bristol
Document Type:Article
Year of first Publication:2012
Year of Completion:2012
Release Date:2017/03/26
Funder:German government [FKZ: 03X5511, FKZ: 13N10684, 13N10685]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer Review:Referiert