Synthesis of silicone elastomers containing trifluoropropyl groups and their use in dielectric elastomer transducers

Dascălu, Mihaela; Dünki, Simon J.; Quinsaat, Jose Enrico Q.; Ko, Yee Song; Opris, Dorina M.

doi:10.1039/c5ra16132k

Cited by 42 publications

(27 citation statements)

References 36 publications

(39 reference statements)

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“…Novel, chemically modified silicone based materials reported in the literature also show reduced driving voltages at increased e 0 /Y values which are mainly caused by a moderate increase of permittivity and a decrease of elastic modulus. [17][18][19][31][32][33] This decrease with the increasing content of polar groups in the material is somewhat surprising as one would normally expect an increase in stiffness caused by the dipolar interactions. 29 The reason for this unexpected observation is a reduced crosslinking degree caused by the polar groups which resulted in a softer material.…”

Section: Resultsmentioning

confidence: 99%

Elastomers with tunable dielectric and electromechanical properties

2016

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Section: Resultsmentioning

confidence: 99%

Elastomers with tunable dielectric and electromechanical properties

2016

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“…Dascalu et al first synthesized polysiloxanes containing trifluoropropyl side‐groups and vinyl end‐groups by anionic copolymerization of 1,3,5‐tris(3,3,3‐trifluoropropyl)‐1,3,5‐trimethylcyclosiloxane (F 3 ) with octamethylcyclotetrasiloxane (D 4 ) in presence of 1,3‐divinyl‐1,1,3,3‐tetramethyldisiloxane end‐blocker and subsequently crosslinked them to elastomers (Scheme d) . The content of trifluoropropyl groups in the copolymers P5 was tuned from 28 to 58 mol% by using different F 3 :D 4 ratios of monomers.…”

Section: Synthesis and Actuation Of High Dielectric Permittivity Elasmentioning

confidence: 99%

Polar Elastomers as Novel Materials for Electromechanical Actuator Applications

2017

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Dielectric elastomer actuators are stretchable capacitors capable of a musclelike actuation when charged. They will one day be used to replace malfunctioning muscles supposing the driving voltage can be reduced below 24 V. This focus here is on polar dielectric elastomers and their behavior under an electric field. Emphasis is placed on all the features that are correlated with the molecular structure, its synthetic realization, and its impact on properties. Regarding the polymer class, the focus, to some degree, is on polysiloxanes because of their attractively low glass transition temperatures. This enables introduction of highly polar groups to the backbone while maintaining soft elastic properties. The goal is to provide a few guidelines for future research in this emerging field that may be useful for those considering entering this fascinating endeavor. Because of the large number of materials available, a few restrictions in the selection have to be applied.

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“…DEAs often utilize cross‐linked polysiloxanes, also known as silicone rubber for poly(dimethyl siloxanes), due to their low T g , high breakdown voltage, and low water uptake. However, silicones typically have low dielectric permittivity (<3), which leads to high operating voltages . Functionalizing silicone elastomers with pendant polar groups represent one method for increasing permittivity.…”

Section: Dielectric Elastomer Actuatorsmentioning

confidence: 99%

“…Functionalizing silicone elastomers with pendant polar groups represent one method for increasing permittivity. Silicones have been synthesized containing trifluoropropyl, nitrile, alkyl chloride, nitroaniline, nitrobenzene, and cyanopropyl pendant groups, which resulted in a modest increase in the permittivity of the silicones at high frequencies. A representative example of these materials comes from Dünki et al.…”

Section: Dielectric Elastomer Actuatorsmentioning

confidence: 99%

Advances in Polymeric Materials for Electromechanical Devices

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2018

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DEs especially exhibit potential for mimicking human muscles due to their high strain capacity and work density. [6] Polymers used for DEs often include siloxanes or acrylic elastomers, and the optimal DE actuators (DEA) in literature are surprisingly comprised of a commercial acrylic adhesive from 3 M. [7] However, these DEs require prestretching and large driving voltages to achieve large actuation strains, which limit their impact. The past decade has seen a plethora of research dedicated to finding materials to circumvent these limitations.Nafion has long served as the benchmark material for IPMCs due to its commercial availability and superior actuation performance at low voltages. Nafion actuators, however, have several drawbacks such as: low bending performance at low humidity, processing difficulties, and back relaxation. Due to these limitations, interest in new ionic polymers for IPMCs continues to grow in the literature. [8] This review aims to summarize the progress made in materials for EAP actuators over the past decade, focusing on IPMCs and DEAs, which comprise a significant fraction of the recent advances.

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Synthesis of silicone elastomers containing trifluoropropyl groups and their use in dielectric elastomer transducers

Abstract: Polysiloxane elastomers containing varying mo2009l% of trifluoropropyl groups were investigated in dielectric elastomer actuators.

Cited by 42 publications

References 36 publications

Elastomers with tunable dielectric and electromechanical properties

Elastomers with tunable dielectric and electromechanical properties

Polar Elastomers as Novel Materials for Electromechanical Actuator Applications

Advances in Polymeric Materials for Electromechanical Devices

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