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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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Publication details

The article was received on 16 Jul 2012, accepted on 28 Sep 2012 and first published on 01 Oct 2012


Article type: Paper
DOI: 10.1039/C2JM34674E
J. Mater. Chem., 2012,22, 24705-24712

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    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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