Full Polymer Dielectric Elastomeric Actuators (DEA) Functionalised with Carbon Nanotubes and High-K Ceramics

Köckritz, Tilo; Luther, René; Paschew, Georgi; Jansen, Irene; Richter, Andreas; Jost, Oliver; Schönecker, Andreas; Beyer, Eckhard

doi:10.3390/mi7100172

Cited by 8 publications

(9 citation statements)

References 39 publications

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“…Research on this crucial topic is emerging and holds great promise for the transducer technology. [38][39][40][41][42][43] Of all the properties considered for Fom, the EBD, though ideally an intrinsic material property, is often compromised as a result of elastomer processing, electrode geometry and transducer operating conditions. [44][45][46] age, which is due to post-curing.…”

Section: 6figure Of Meritmentioning

confidence: 99%

Mapping the mechanical and electrical properties of commercial silicone elastomer formulations for stretchable transducers

et al. 2020

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Section: 6figure Of Meritmentioning

confidence: 99%

Mapping the mechanical and electrical properties of commercial silicone elastomer formulations for stretchable transducers

et al. 2020

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“…Another issue to consider when transitioning from research to commercialization is the life-time. Research within this crucial topic is emerging and holds great promise for the DEG technology [53]- [58].…”

Section: ( ) =mentioning

confidence: 99%

Silicone elastomer map: design the ideal elastomer

Vaičekauskaitė¹,

Mazurek²,

Vudayagiri³

et al. 2019

Electroactive Polymer Actuators and Devices (EAPAD) XXI

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Soft, stretchable and light-weight transducers are most sought after for research on advanced applications like stretchable electronics, soft robotics and energy harvesters. Stretchable electronics require elastomers that have high elongation at break, high dielectric permittivity and high breakdown strength. Commercial silicone elastomer formulations often do not encompass all the necessary properties required to function effectively as stretchable transducers but they are used out of familiarity. In this study, most commonly used commercial silicone formulations are formulated with different stoichiometry and also blends of these formulations are made in order to manipulate their resulting properties. The properties of these blends like ultimate stress and strain, Young's modulus, dielectric permittivity and breakdown strength are investigated and mapped to identify those that have the best suited properties for fabricating soft stretchable devices. On a research level, Sylgard 184, Sylgard 186, Ecoflex 00-50, Ecoflex 00-30 and Ecoflex 00-10 are widely used for fabricating such soft devices and hence they will be worked upon in this study. The elastomers obtained using the methods of mixing illustrated here can act as a starting point for conceptualizing the feasibility of a product on research level.

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“…For most DEAs, carbon powders had been widely used as stretchable compliant electrodes for large deformations [47,48,49,50]. Since the compliant electrodes of the pouch of the BSPA remained the same, we exploited commercially available aluminum foil as a compliant electrode in this research.…”

Section: Discussionmentioning

confidence: 99%

Bio-Inspired Soft Proboscis Actuator Driven by Dielectric Elastomer Fluid Transducers

Lin

Liu

2019

Polymers

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In recent years, dielectric elastomer actuators (DEAs) have attracted lots of attention for providing multiple degree-of-freedom motions, such as axial extensions, torsion, bending, and their combinations. The wide applications include soft robots, artificial muscles, and biomimetic animals. In general, DEAs are composed of stretchable elastomers sandwiched by two compliant electrodes and actuated by applying external electric stimuli. Since most DEAs are limited by the breakdown thresholds and low strain-to-volume ratios, dielectric fluid transducers (DFTs) have been developed by substituting dielectric elastomers with dielectric fluids for high breakdown threshold voltages. In addition, DFTs have large rate of lateral extensions, due to their fluid contents, and are beneficial for soft actuators and pumping applications. In this research, we exploited DFTs to develop a soft spiral proboscis actuator inspired by the proboscises of butterflies for achieving uncoiling and coiling motions under external voltages. The bio-inspired spiral proboscis actuator (BSPA) was composed of a coil-shaped tube, a DFT-based pouch, and a spiral spring for mimicking the tubular part, a mechanism to uncoil the tube, and a mechanism to coil the tube, respectively. When applying external voltages to the pouch, the high dielectric fluid was injected into the empty coiled tube for uncoiling where the tube elongated from a compact volume to a stiff and flexible shape. When removing the exciting voltages, the tube retracted to its original coiled shape via the elastic spring. A prototype was designed, fabricated, and examined with high stimulating voltages. It was demonstrated that the proboscis actuator could achieve uncoiling and coiling motions consistently for several cycles. Compared to convection DEA-based pumps with fixed shapes, the proposed actuator is soft and beneficial for portable applications and coiling/uncoiling motions.

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Full Polymer Dielectric Elastomeric Actuators (DEA) Functionalised with Carbon Nanotubes and High-K Ceramics

Cited by 8 publications

References 39 publications

Mapping the mechanical and electrical properties of commercial silicone elastomer formulations for stretchable transducers

Mapping the mechanical and electrical properties of commercial silicone elastomer formulations for stretchable transducers

Silicone elastomer map: design the ideal elastomer

Bio-Inspired Soft Proboscis Actuator Driven by Dielectric Elastomer Fluid Transducers

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