Enhancement of dielectric permittivity and electromechanical response in silicone elastomers molecular grafting of organic dipoles to the macromolecular Network
- 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.
Author details: | Bjoern Kussmaul, Sebastian Risse, Guggi Kofod, Remi Wache, Michael WegenerORCiDGND, Denis N. McCarthy, Hartmut Krüger, Reimund GerhardORCiDGND |
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DOI: | https://doi.org/10.1002/adfm.201100884 |
ISSN: | 1616-301X |
Title of parent work (English): | Advanced functional materials |
Publisher: | Wiley-VCH |
Place of publishing: | Weinheim |
Publication type: | Article |
Language: | English |
Year of first publication: | 2011 |
Publication year: | 2011 |
Release date: | 2017/03/26 |
Tag: | dipole grafting; permittivity enhancement; silicone based dielectric elastomer actuators |
Volume: | 21 |
Issue: | 23 |
Number of pages: | 6 |
First page: | 4589 |
Last Page: | 4594 |
Funding institution: | German government [FKZ: 13N10684, 13N10685] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
Peer review: | Referiert |