scholarly journals Novel Arrangements for High Performance and Durable Dielectric Elastomer Actuation

Actuators ◽  
2016 ◽  
Vol 5 (3) ◽  
pp. 20 ◽  
Author(s):  
Runan Zhang ◽  
Xiaoqiang Huang ◽  
Tiefeng Li ◽  
Pejman Iravani ◽  
Patrick Keogh
Keyword(s):  
High Performance ◽  
Dielectric Elastomer ◽  
Elastomer Actuation

scholarly journals Improved Mechanical and Electrochemical Properties of XNBR Dielectric Elastomer Actuator by Poly(dopamine) Functionalized Graphene Nano-Sheets

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 218 ◽  
Author(s):  
Dan Yang ◽  
Xinxin Kong ◽  
Yufeng Ni ◽  
Mengnan Ruan ◽  
Shuo Huang ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
High Performance ◽  
Low Cost ◽  
Dielectric Strength ◽  
Dielectric Elastomer ◽  
Hydroxyl Groups ◽  
Butadiene Rubber ◽  
Functionalized Graphene ◽  
Filler Dispersion ◽  
Phenolic Hydroxyl Groups

In this work, graphene nano-sheets (GNS) functionalized with poly(dopamine) (PDA) (denoted as GNS-PDA) were dispersed in a carboxylated nitrile butadiene rubber (XNBR) matrix to obtain excellent dielectric composites via latex mixing. Because hydrogen bonds were formed between –COOH groups of XNBR and phenolic hydroxyl groups of PDA, the encapsulation of GNS-PDA around XNBR latex particles was achieved, and led to a segregated network structure of filler formed in the GNS-PDA/XNBR composite. Thus, the XNBR composite filled with GNS-PDA showed improved filler dispersion, enhanced dielectric constant and dielectric strength, and decreased conductivity compared with the XNBR composite filled with pristine GNS. Finally, the GNS-PDA/XNBR composite displayed an actuated strain of 2.4% at 18 kV/mm, and this actuated strain was much larger than that of pure XNBR (1.3%) at the same electric field. This simple, environmentally friendly, low-cost, and effective method provides a promising route for obtaining a high-performance dielectric elastomer with improved mechanical and electrochemical properties.

Hydrostatically Coupled Dielectric Elastomer Actuators: New Opportunities for Haptics

2011 ◽  
Vol 1312 ◽  
Author(s):  
Federico Carpi ◽  
Gabriele Frediani ◽  
Danilo De Rossi
Keyword(s):  
High Performance ◽  
New Technology ◽  
Relative Displacement ◽  
Dielectric Elastomer ◽  
Tactile Feedback ◽  
Haptic Interfaces ◽  
Silicone Grease ◽  
Performance Technology ◽  
Hydrostatic Transmission ◽  
Dielectric Elastomer Actuators

ABSTRACTDielectric elastomer actuators (DEAs) have been demonstrated to represent today a high-performance technology for electromechanical transducers based on electroactive polymers. As a means to improve versatility and safety of DEAs for several fields of application, so-called ‘hydrostatically coupled’ DEAs (HC-DEAs) have recently been described. HC-DEAs are based on an incompressible fluid that mechanically couples a DE-based active part to a passive part interfaced to the load, so as to enable hydrostatic transmission. This paper presents ongoing developments of bubble-like HC-DEAs and their promising potential application in the field of haptics. In particular, the first part of the paper describes a static and dynamic characterization of a prototype actuator made of two pre-stretched membranes (20 mm wide, 1.8 mm high, and 60 μm thick) of 3M VHB acrylic elastomer, coupled via silicone grease. The actuator exhibited a maximum stress of 1.3 kPa at 4.4 kV, a relative displacement of -80% at 4.4 kV, a -3dB bandwidth of 3 Hz, and a resonance frequency of 160 Hz. The second part of the paper presents possible applications of the tested actuator configuration for haptic interfaces. Two specific examples are considered. The first deals with a wearable tactile/haptic display used to provide users with tactile feedback during electronic navigation in virtual environments. The display consists of HC-DEAs arranged in contact with finger tips. As a second example of usage, an up-scaled prototype version of an 8-dots refreshable cell for dynamic Braille displays is shown. Each Braille pin consists of a miniature HC-DEA, with a diameter lower than 2 mm. Both types of applications clearly show the potential of the new technology and the prospective opportunities for haptics.

scholarly journals Tunable millimeter-wave phase shifter based on dielectric elastomer actuation

2014 ◽  
Vol 104 (2) ◽  
pp. 024104 ◽  
Author(s):  
P. Romano ◽  
O. Araromi ◽  
S. Rosset ◽  
H. Shea ◽  
J. Perruisseau-Carrier
Keyword(s):  
Millimeter Wave ◽  
Phase Shifter ◽  
Dielectric Elastomer ◽  
Wave Phase ◽  
Elastomer Actuation

Effect of mechanical pre-stretch on the stabilization of dielectric elastomer actuation

2011 ◽  
Vol 44 (15) ◽  
pp. 155301 ◽  
Author(s):  
Bo Li ◽  
Hualing Chen ◽  
Junhua Qiang ◽  
Shulin Hu ◽  
Zicai Zhu ◽  
...  
Keyword(s):  
Dielectric Elastomer ◽  
Elastomer Actuation

Shape Control of Large Lightweight Mirrors with Dielectric Elastomer Actuation

2021 ◽  
pp. 61-82
Author(s):  
R. D. Kornbluh ◽  
D. S. Flamm ◽  
H. Prahlad ◽  
K. M. Nashold ◽  
S. Chhokar ◽  
...  
Keyword(s):  
Shape Control ◽  
Dielectric Elastomer ◽  
Elastomer Actuation

scholarly journals Effects of plasticization of a soft silicone for dielectric elastomer actuation

2013 ◽  
Vol 22 (10) ◽  
pp. 104020 ◽  
Author(s):  
Fabia Galantini ◽  
Federico Carpi ◽  
Giuseppe Gallone
Keyword(s):  
Dielectric Elastomer ◽  
Elastomer Actuation

scholarly journals ZnO as a cheap and effective filler for high breakdown strength elastomers

RSC Advances ◽  
2017 ◽  
Vol 7 (72) ◽  
pp. 45784-45791 ◽  
Author(s):  
Liyun Yu ◽  
Anne Ladegaard Skov
Keyword(s):  
High Performance ◽  
Breakdown Strength ◽  
New Products ◽  
Dielectric Elastomer ◽  
Dielectric Elastomers ◽  
High Demand

Cheap, high-performance dielectric elastomers are in high demand from industry concerning new products based on dielectric elastomer transducers.

Characterization of slide ring materials for dielectric elastomer actuators

2021 ◽  
Author(s):  
Jun Shintake ◽  
Koya Matsuno ◽  
Kazumasa Baba ◽  
Hiromitsu Takeuchi
Keyword(s):  
Electric Fields ◽  
High Performance ◽  
Mechanical Performance ◽  
Dielectric Strength ◽  
Dielectric Elastomer ◽  
Elongation At Break ◽  
Dielectric Elastomer Actuators ◽  
Elastomeric Materials ◽  
Mechanical Performances

Abstract This paper investigates the characteristics of sliding ring materials (SRMs), which are promising elastomeric materials for dielectric elastomer actuators (DEAs). Two different types of SRMs with Young's modulus of 0.8 MPa and 3.3 MPa, respectively, are prepared, and their material and mechanical properties and electro-mechanical performances at electric fields of up to 30 V/um are characterized. For comparison, the same tests are also performed on several commercially available elastomers: Elastosil 2030, Ecoflex 00-30, CF19-2186, and VHB 4905. The results reveal that SRMs demonstrate negligible Mullins effect and hysteresis, while their dielectric strength (62.4‒112.4 V/µm) and viscoelasticity (tan⁡δ 0.07‒0.24 at 10 Hz) are comparable or even superior to those of other elastomers. In addition, elongation at break is found to be 163.8‒172.1%. SRMs exhibit excellent electro-mechanical performance; for instance, one of the two types has an actuation force 293.2 mN at 24.9 V/µm and a strain of 5.2% at 22.3 V/µm. These values are the largest or larger than most of the tested elastomers. The high performance of SRMs results from their dielectric constant, which ranges from 10.3‒13.4, leading to an electro-mechanical sensitivity of up to 15.3 MPa-1. These results illustrate SRMs as attractive material options for DEAs.

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