Dielectric elastomer transducers with enhanced force output and work density

Stoyanov, Hristiyan; Brochu, Paul; Niu, Xiaofan; Gaspera, Enrico Della; Pei, Qibing

doi:10.1063/1.4730953

Cited by 33 publications

(37 citation statements)

References 22 publications

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“…This could be due to dispersing of nanoparticles in the silicone elastomer, which increases the crosslink density, thereby leading to increased hardness. 26 Another explanation could be that the nanoparticles affect the elastic modulus of the silicone elastomer. 27 The modulus of elasticity of silicone elastomer is proportional to the Shore A hardness.…”

Section: Shore a Hardnessmentioning

confidence: 99%

Biomechanical properties of nano-TiO2 addition to a medical silicone elastomer: The effect of artificial ageing

Wang

Liu

Jing

et al. 2014

Journal of Dentistry

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Section: Shore a Hardnessmentioning

confidence: 99%

Biomechanical properties of nano-TiO2 addition to a medical silicone elastomer: The effect of artificial ageing

Wang

Liu

Jing

et al. 2014

Journal of Dentistry

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“…

ABSTRACTWe demonstrate that the force output and work density of polydimethylsiloxane (PDMS) based dielectric elastomer transducers can be significantly enhanced by the addition of high permittivity titanium dioxide nanoparticles which was also shown by Stoyanov et al [1] for pre-stretched elastomers and by Carpi et al for RTV silicones [2]. Furthermore the elastomer matrix is optimized to give very high breakdown strengths.

…”

mentioning

confidence: 98%

Novel silicone elastomer formulations for DEAPs

2013

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We demonstrate that the force output and work density of polydimethylsiloxane (PDMS) based dielectric elastomer transducers can be significantly enhanced by the addition of high permittivity titanium dioxide nanoparticles which was also shown by Stoyanov et al [1] for pre-stretched elastomers and by Carpi et al for RTV silicones [2]. Furthermore the elastomer matrix is optimized to give very high breakdown strengths. We obtain an increase in the dielectric permittivity of a factor of approximately 2 with a loading of 12% TiO 2 particles compared to the pure modified silicone elastomer with breakdown strengths remaining more or less unaffected by the loading of TiO 2 particles. Breakdown strengths were measured in the range from approximately 80-150 V/μm with averages of the order of 120-130 V/μm for the modified silicone elastomer with loadings ranging from 0 to 12%.

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“…Additionally, TiO2 was added to this formulation, in order to increase permittivity and thereby also possible actuation strain. TiO2 is a commonly applied permittivity enhancer in silicone DEs [11][12][13]40] mainly due to great compatibility with the silicone matrix from the silicone-compatibilised surface treatments of the particles. Therefore, it was desired to investigate possible synergistic (or other positive) effects from the combination of chloropropyl-functional silicone oil and TiO2 since the chloropropyl-functional silicone oil in itself does not contribute with as significant dielectric permittivity enhancement as required for commercial products to become more competitive.…”

Section: Samples With Tio2mentioning

confidence: 99%

A simple method for reducing inevitable dielectric loss in high-permittivity dielectric elastomers

Madsen

Mazurek

et al. 2016

Smart Mater. Struct.

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Abstract. Commercial viability of dielectric elastomers is currently limited by a few obstacles, including high driving voltages (in the kV range). Driving voltage can be lowered by either decreasing the Young's modulus or increasing the dielectric permittivity of silicone elastomers, or a combination thereof. A decrease in the Young's modulus, however, is often accompanied by a loss in mechanical stability, whereas increases in dielectric permittivity are usually followed by a large increase in dielectric loss followed by a decrease in breakdown strength and thereby the lifetime of the dielectric elastomer. A new soft elastomer matrix, with high dielectric permittivity and a low Young's modulus, aligned with no loss of mechanical stability, was prepared through the use of commercially available chloropropyl-functional silicone oil mixed into a tough commercial LSR silicone elastomer. The addition of chloropropylfunctional silicone oil in concentrations up to 30 phr was found to improve the properties of the silicone elastomer significantly, as dielectric permittivity increased to 4.4, dielectric breakdown increased up to 25% and dielectric losses were reduced. The chloropropyl-functional silicone oil also decreased the dielectric losses of an elastomer containing dielectric permittivity-enhancing TiO2 fillers. Commercially available chloropropyl-functional silicone oil thus constitutes a facile method for improved silicone dielectric elastomers, with very low dielectric losses.

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Dielectric elastomer transducers with enhanced force output and work density

Cited by 33 publications

References 22 publications

Biomechanical properties of nano-TiO2 addition to a medical silicone elastomer: The effect of artificial ageing

Biomechanical properties of nano-TiO2 addition to a medical silicone elastomer: The effect of artificial ageing

Novel silicone elastomer formulations for DEAPs

A simple method for reducing inevitable dielectric loss in high-permittivity dielectric elastomers

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