Journal ArticleDOI
High-Speed Electrically Actuated Elastomers with Strain Greater Than 100%
TLDR
It is shown that prestraining the film further improves the performance of electrical actuators made from films of dielectric elastomers coated on both sides with compliant electrode material.Abstract:
Electrical actuators were made from films of dielectric elastomers (such as silicones) coated on both sides with compliant electrode material. When voltage was applied, the resulting electrostatic forces compressed the film in thickness and expanded it in area, producing strains up to 30 to 40%. It is now shown that prestraining the film further improves the performance of these devices. Actuated strains up to 117% were demonstrated with silicone elastomers, and up to 215% with acrylic elastomers using biaxially and uniaxially prestrained films. The strain, pressure, and response time of silicone exceeded those of natural muscle; specific energy densities greatly exceeded those of other field-actuated materials. Because the actuation mechanism is faster than in other high-strain electroactive polymers, this technology may be suitable for diverse applications.read more
Citations
More filters
Journal ArticleDOI
Strong, Transparent, Multifunctional, Carbon Nanotube Sheets
Mei Zhang,Mei Zhang,Shaoli Fang,Shaoli Fang,Anvar A. Zakhidov,Anvar A. Zakhidov,Sergey Lee,Sergey Lee,Ali E. Aliev,Ali E. Aliev,Chris Williams,Chris Williams,Ken Atkinson,Ken Atkinson,Ray H. Baughman,Ray H. Baughman +15 more
TL;DR: Self-supporting nanotube sheets are initially formed as a highly anisotropic electronically conducting aerogel that can be densified into strong sheets that are as thin as 50 nanometers and the measured gravimetric strength of orthogonally oriented sheet arrays exceeds that of sheets of high-strength steel.
Journal ArticleDOI
Energy applications of ionic liquids
Douglas R. MacFarlane,Naoki Tachikawa,Maria Forsyth,Jennifer M. Pringle,Patrick C. Howlett,Gloria D. Elliott,James H. Davis,Masayoshi Watanabe,Patrice Simon,C. Austen Angell +9 more
TL;DR: Ionic liquids offer a unique suite of properties that make them important candidates for a number of energy related applications, such as fuel cell electrolytes and CO2 absorbents for post-combustion CO2 capture as mentioned in this paper.
Journal ArticleDOI
Fundamentals, processes and applications of high-permittivity polymer–matrix composites
Zhi-Min Dang,Zhi-Min Dang,Zhi-Min Dang,Jinkai Yuan,Jun-Wei Zha,Tao Zhou,Shengtao Li,Guo-Hua Hu,Guo-Hua Hu +8 more
TL;DR: In this paper, the authors focus on the important role and challenges of high-k polymer-matrix composites (PMC) in new technologies and discuss potential applications of highk PMC.
Journal ArticleDOI
Stretchable, Transparent, Ionic Conductors
Christoph Keplinger,Jeong-Yun Sun,Choon Chiang Foo,Choon Chiang Foo,Philipp Rothemund,George M. Whitesides,George M. Whitesides,Zhigang Suo +7 more
TL;DR: A class of devices enabled by ionic conductors that are highly stretchable, fully transparent to light of all colors, and capable of operation at frequencies beyond 10 kilohertz and voltages above 10 kilovolts are described.
Journal ArticleDOI
Advances in dielectric elastomers for actuators and artificial muscles.
Paul Brochu,Qibing Pei +1 more
TL;DR: A number of materials have been explored for their use as artificial muscles, but dielectric elastomers appear to provide the best combination of properties for true muscle-like actuation, and widespread adoption of DEs has been hindered by premature breakdown and the requirement for high voltages and bulky support frames.
References
More filters
Journal ArticleDOI
Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals
Seung Eek Park,Thomas R. Shrout +1 more
TL;DR: In this article, the piezoelectric properties of relaxor based ferroelectric single crystals, such as Pb(Zn1/3Nb2/3)O3 and PbTiO3, were investigated for electromechanical actuators.
Journal ArticleDOI
Carbon Nanotube Actuators
Ray H. Baughman,Changxing Cui,Anvar A. Zakhidov,Zafar Iqbal,Joseph N. Barisci,G.M. Spinks,Gordon G. Wallace,Alberto Mazzoldi,Danillo de Rossi,Andrew G. Rinzler,Oliver Jaschinski,S. Roth,Miklos Kertesz +12 more
TL;DR: Predictions based on measurements suggest that actuators using optimized nanotube sheets may eventually provide substantially higher work densities per cycle than any previously known technology.
Journal ArticleDOI
Giant Electrostriction and Relaxor Ferroelectric Behavior in Electron-Irradiated Poly(vinylidene fluoride-trifluoroethylene) Copolymer
TL;DR: An exceptionally high electrostrictive response was observed in electron-irradiated poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] copolymer, suggesting that the electron irradiation breaks up the coherent polarization domain in normal ferroelectric P( VDF- TrFE)Copolymer into nanopolar regions that transform the material into a relaxor ferroElectric.
Journal ArticleDOI
Electrostriction of polymer dielectrics with compliant electrodes as a means of actuation
TL;DR: Electrostrictive polymer (EP) dielectric actuators have been shown to produce 5 to 20 times the effective actuation pressure of conventional air-gap electrostatics at the same electric field strength as mentioned in this paper.
Journal ArticleDOI
Two-Dimensional Electronic Excitations in Self-Assembled Conjugated Polymer Nanocrystals
TL;DR: The relatively weak absorption bands of the delocalized polaron in the visible and near-infrared spectral ranges may help to achieve laser action in nanocrystalline polymer devices using current injection.
Related Papers (5)
Advances in dielectric elastomers for actuators and artificial muscles.
Paul Brochu,Qibing Pei +1 more