Review on the role of intrinsic structure on properties of dielectric elastomers for enhanced actuation performance

Sahu, Dhananjay; Sahu, Raj Kumar

doi:10.1016/j.mtcomm.2022.105178

Cited by 14 publications

(18 citation statements)

References 199 publications

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“…This is likely due to the increase in crosslinking density which affects the mechanical properties of the elastomer and its ability to withstand high electric fields. [ 25 ]…”

Section: Resultsmentioning

confidence: 99%

“…This is likely due to the increase in crosslinking density which affects the mechanical properties of the elastomer and its ability to withstand high electric fields. [25] Figure 3a presents and compares the measured elastic properties of the polymers. At high strain, the elastomer exhibits a strain-hardening behavior due to the limited extensibility of polymer chains.…”

Section: Design Of De Layermentioning

confidence: 99%

“…This increase in hydrogen bonding is thought to be responsible for the dissipation of energy and alleviates local stress during mechanical loading, which enhances the stretchability of the polymer. [25,26] As our DEA is designed to respond rapidly and work repeatedly, cyclic curves of each polymer were obtained to evaluate the energy dissipation characteristics (Figure 3c-g). During the cyclic loading and unloading process, the stress on reloading is observed to be lower than that on the initial loading for the same strain, resulting in a stress-softening phenomenon known as the Mullins effect.…”

Section: Design Of De Layermentioning

confidence: 99%

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Digital Light Processing 3D‐Printed Multilayer Dielectric Elastomer Actuator for Vibrotactile Device

Huang,

Fu,

Tan

et al. 2023

Adv Materials Technologies

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Dielectric elastomer actuators (DEAs) have emerged as promising components in the field of soft robotics. Multilayer DEAs can enhance the output performance compared to single‐layer DEAs, but the common layer‐by‐layer stacking methods are time‐consuming and likely susceptible to concerns about frequent dielectric breakdown. Herein, the one‐piece multilayer DEAs are directly fabricated via the digital light processing (DLP) 3D printing method, taking advantage of the precise and intricate printed structure. The study also focuses on the adjustable DLP printable resin formulation, aiming to achieve a DLP printed polyurethane acrylate (PUA)‐based dielectric elastomer (DE) material that exhibits desirable characteristics, such as an appropriate dielectric constant, modulus, and minimal hysteresis loss. The non‐pre‐stretch DLP‐printed cylindrical DEA demonstrates a significant blocked force of 270 mN and maintains 45% actuation performance at a frequency of 100 Hz, attributed to both the printed multilayer structure and the optimized formulation of the DE material. Moreover, the feasibility of DLP‐printed DEAs as vibrotactile devices is demonstrated. This work has advanced the development of rapid and efficient fabrication methods of multilayer DEAs using DLP printing, with enhanced force output and attractive applications in robotics and haptic interfaces.

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“…This is likely due to the increase in crosslinking density which affects the mechanical properties of the elastomer and its ability to withstand high electric fields. [ 25 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Design Of De Layermentioning

confidence: 99%

Section: Design Of De Layermentioning

confidence: 99%

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Digital Light Processing 3D‐Printed Multilayer Dielectric Elastomer Actuator for Vibrotactile Device

Huang,

Fu,

Tan

et al. 2023

Adv Materials Technologies

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“…Depending on the sensing mechanism, several types of FPSs have been explored, including piezoresistive, 28,38,39 capacitive, [40][41][42][43] piezoelectric, [44][45][46][47] triboelectric, 48-51 ionic, 22,23,52 and hybrid response pressure sensors. 24,25 The diversity of active materials and structural designs allows sensors designed based on different sensing mechanisms to have unique sensing characteristics.…”

Section: Flexible Pressure Sensor Typesmentioning

confidence: 99%

“…Capacitive flexible pressure sensors offer the advantages of fast response time and low power consumption. Similar to piezoresistive pressure sensors, research on capacitive flexible pressure sensors can be divided into four main categories: sensors based on micropatterned structured dielectric layers or electrodes, 40,41 sensors with microporous structured dielectric layers, 42,43 sensors with fiber network structured dielectric layers, and other types of sensors. 34,57,58 Among them, the capacitance of sensors based on micropatterns and microporous structures is smaller than that of sensors without microstructures, because the dielectric constant of air is smaller.…”

Section: Capacitive Sensorsmentioning

confidence: 99%

Recent progress in flexible pressure sensors based on multiple microstructures: from design to application

Zhao

Zhang

et al. 2023

Nanoscale

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Electric‐Thermal Dual‐Responsive HASEL Actuator for Solid–Liquid Bi‐Stabilized Smart Switching

Wang,

Jiang,

et al. 2024

Adv Funct Materials

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Hydraulically amplified self‐healing electrostatic (HASEL) actuators generally consisting of dielectric elastomer (DE) and transformer oil have garnered interest in the realm of soft actuators. However, existing DE can hardly reconcile contradictions between high dielectric constants and low modulus, while traditional transformer oil demands a continuous power supply to sustain strain. Herein, by incorporating liquid metal (LM) featuring high dielectric constant and low modulus, with poly(ε‐caprolactone) (PCL) bearing low phase change temperature, a new concept of electric‐thermal dual‐responsive HASEL actuator is first proposed for solid–liquid bi‐stabilized smart switching. It is not only able to simultaneously deliver a tripled dielectric constant of DE from 3.1 to 9.7 (at 1 kHz) and a low modulus (0.12–0.15 MPa), thus achieving a strain of 9% and a specific power of 64.8 W kg−1; but also, PCL replaces the transformer oil, acting as a “temperature switch” for the HASEL actuator, i.e., when PCL solidifies, the HASEL actuator stabilizes the deformation, allowing it to continue working even without power supply. Exemplified by valve, the as‐prepared dual‐responsive HASEL actuator can independently control the flow rate of each valve unit. This electric‐thermal dual‐responsive HASEL actuator introduces an innovative strategy for developing the next generation of multifunctional smart switching.

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Review on the role of intrinsic structure on properties of dielectric elastomers for enhanced actuation performance

Cited by 14 publications

References 199 publications

Digital Light Processing 3D‐Printed Multilayer Dielectric Elastomer Actuator for Vibrotactile Device

Digital Light Processing 3D‐Printed Multilayer Dielectric Elastomer Actuator for Vibrotactile Device

Recent progress in flexible pressure sensors based on multiple microstructures: from design to application

Electric‐Thermal Dual‐Responsive HASEL Actuator for Solid–Liquid Bi‐Stabilized Smart Switching

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