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Enhancement of dielectric permittivity and electromechanical response in silicone elastomers: Molecular grafting of organic dipoles to the macromolecular network

Kussmaul, B, Risse, S, Kofod, G, Waché, R, Wegener, M, McCarthy, DN, Krüger, H and Gerhard, R (2011) Enhancement of dielectric permittivity and electromechanical response in silicone elastomers: Molecular grafting of organic dipoles to the macromolecular network Advanced Functional Materials, 21 (23). pp. 4589-4594.

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Abstract

A novel method is established for permittivity enhancement of a silicone matrix for dielectric elastomer actuators (DEAs) by molecular level modifications of the elastomer matrix. A push-pull dipole is synthesized to be compatible with the silicone crosslinking chemistry, allowing for direct grafting to the crosslinker molecules in a one-step film formation process. This method prevents agglomeration and yields elastomer films that are homogeneous down to the molecular level. The dipole-to-silicone network grafting reaction is studied by FTIR. The chemical, thermal, mechanical and electrical properties of films with dipole contents ranging from 0 wt% to 13.4 wt% were thoroughly characterized. The grafting of dipoles modifies the relative permittivity and the stiffness, resulting in the actuation strain at a given electrical field being improved by a factor of six. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Item Type: Article
Authors :
NameEmailORCID
Kussmaul, BUNSPECIFIEDUNSPECIFIED
Risse, SUNSPECIFIEDUNSPECIFIED
Kofod, GUNSPECIFIEDUNSPECIFIED
Waché, RUNSPECIFIEDUNSPECIFIED
Wegener, MUNSPECIFIEDUNSPECIFIED
McCarthy, DNUNSPECIFIEDUNSPECIFIED
Krüger, HUNSPECIFIEDUNSPECIFIED
Gerhard, RUNSPECIFIEDUNSPECIFIED
Date : 6 December 2011
Identification Number : 10.1002/adfm.201100884
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:32
Last Modified : 17 May 2017 12:32
URI: http://epubs.surrey.ac.uk/id/eprint/835732

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