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.
Verfasserangaben: | 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 |
Titel des übergeordneten Werks (Englisch): | Advanced functional materials |
Verlag: | Wiley-VCH |
Verlagsort: | Weinheim |
Publikationstyp: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2011 |
Erscheinungsjahr: | 2011 |
Datum der Freischaltung: | 26.03.2017 |
Freies Schlagwort / Tag: | dipole grafting; permittivity enhancement; silicone based dielectric elastomer actuators |
Band: | 21 |
Ausgabe: | 23 |
Seitenanzahl: | 6 |
Erste Seite: | 4589 |
Letzte Seite: | 4594 |
Fördernde Institution: | German government [FKZ: 13N10684, 13N10685] |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
Peer Review: | Referiert |