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Issue 47, 2012
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Towards materials with enhanced electro-mechanical response: CaCu3Ti4O12–polydimethylsiloxane composites

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Abstract

We describe a straightforward production pathway of polymer matrix composites with increased dielectric constant for dielectric elastomer actuators (DEAs). Up to date, the approach of using composites made of high dielectric constant ceramics and insulating polymers has not evidenced any improvement in the performance of DEA devices, mainly as a consequence of the ferroelectric nature of the employed ceramics. We propose here an unexplored alternative to these traditional fillers, introducing calcium copper titanate (CCTO) CaCu3Ti4O12, which has a giant dielectric constant making it very suitable for capacitive applications. All CCTO–polydimethylsiloxane (PDMS) composites developed display an improved electro-mechanical performance. The largest actuation improvement was achieved for the composite with 5.1 vol% of CCTO, having an increment in the actuation strain of about 100% together with a reduction of 25% in the electric field compared to the raw PDMS matrix.

Graphical abstract: Towards materials with enhanced electro-mechanical response: CaCu3Ti4O12–polydimethylsiloxane composites

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Supplementary files

Article information


Submitted
16 Jul 2012
Accepted
28 Sep 2012
First published
01 Oct 2012

J. Mater. Chem., 2012,22, 24705-24712
Article type
Paper

Towards materials with enhanced electro-mechanical response: CaCu3Ti4O12–polydimethylsiloxane composites

L. J. Romasanta, P. Leret, L. Casaban, M. Hernández, M. A. de la Rubia, J. F. Fernández, J. M. Kenny, M. A. Lopez-Manchado and R. Verdejo, J. Mater. Chem., 2012, 22, 24705
DOI: 10.1039/C2JM34674E

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