A new low moduli dielectric elastomer nano-structured composite with high permittivity exhibiting large actuation strain induced by low electric field

Zhang, Feixiang; Li, Tiefeng; Luo, Yingwu

doi:10.1016/j.compscitech.2017.12.016

Cited by 43 publications

(18 citation statements)

References 36 publications

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“…According to the 1H NMR spectrum, a macroRAFT agent molecule had 20 AA and 5 St units. GPC 46 determined the relative molecular weight of the AA20-b-St5-RAFT agent to be 2309 g/mol. Nanoparticles of TiO 2 , smoldered silica, and silaned silica added to a silicone-based elastomer utilized for the manufacture of maxillofacial prostheses were found to be nontoxic.…”

Section: Efficient Electrical Energy With Dielectric Elastomersmentioning

confidence: 99%

Smart materials for changing the electrical properties of nanostructures

Abbas

2021

Composites and Advanced Materials

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Smart materials have an important role in modern applications. They have contributed to improving various applications in several fields. One of the areas most affected by the improvement of smart materials is nanostructures. These materials are created by basic techniques, such as arrangement manipulation. Significant efforts have been made to enhance smart materials so that they resemble natural materials in terms of accuracy, design, and utility. Here, a review of the latest research on smart materials that can alter the electrical properties of nanostructures is presented. The main objective of this review is to introduce the role of smart materials in controlling the electrical performance of nanostructures. Furthermore, this review proposes an analysis of the integration and cooperation of previous research, such as the use of a piezoelectric motor in the design of structural magnetic nanodevices to control these devices. Piezoelectric actuators can also be used to develop a new method for controlling PV modulators for fabricating a single-wall nanotube. This new proposal could alter the properties of many nanoscale systems serving several medical and engineering fields. Moreover, this review proposes a novel methodology for nanocoating by introducing an antireflective coating with multiple layers. This method can effectively enhance the functions of the nanoscale coating.

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Section: Efficient Electrical Energy With Dielectric Elastomersmentioning

confidence: 99%

Smart materials for changing the electrical properties of nanostructures

Abbas

2021

Composites and Advanced Materials

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“…Shea et al [ 6 ] used a pad-printing method to produce micrometer-thick silicone DE membranes and achieved a lateral actuation strain of 7.5% at only 245 V. In addition, the driving voltage can also be reduced by improving the electromechanical sensitivity ( β = ε r / Y ) with an increase in ε r and/or decrease in Y [ 7 ]. In terms of stress, a low elastic modulus which results from adding a polar solvent or plasticizer into the elastomer matrix is not advantageous, because of the accompanying poor mechanical properties and long-term performance disability [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

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

Yang

Kong

et al. 2019

Polymers

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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.

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“…20−22 Recently, graphene and graphene oxide (GO) have attracted considerable interest in the field of dielectric elastomer actuators. 20,23 Graphene, a single-atom-thick honeycomb planar structure of sp 2 carbon atoms, is one of the most attractive and preferential nanoparticles because of its prominent conductivity, electron mobility, and large specific surface area. 24,25 The prevalent method for the production of graphene is the initial oxidation of graphite to GO, followed by the thermal or chemical reduction process.…”

Section: Introductionmentioning

confidence: 99%

“…To address this problem, incorporation of conductive nanoparticles into the polymer matrix has been recognized as a promising method for increasing the dielectric permittivity (ε r ) of composite actuators . However, the percolation of nanoparticles, on one hand, increases the dielectric permittivity and, on the other hand, increases the elastic modulus and the dielectric loss of composites. , Therefore, conductive nanoparticles can largely affect the actuation performance of DEAs by influencing the different mechanical and electrical properties such as dielectric permittivity, dielectric loss, electrical breakdown strength, and elastic modulus. − …”

Section: Introductionmentioning

confidence: 99%

“…Recently, graphene and graphene oxide (GO) have attracted considerable interest in the field of dielectric elastomer actuators. , Graphene, a single-atom-thick honeycomb planar structure of sp 2 carbon atoms, is one of the most attractive and preferential nanoparticles because of its prominent conductivity, electron mobility, and large specific surface area. , The prevalent method for the production of graphene is the initial oxidation of graphite to GO, followed by the thermal or chemical reduction process. , Therefore, a large number of oxygene-containing groups on the surface of GO can affect the sp 2 structure and polarity of graphene . The thermal reduction method with a manipulated level of reduction gives the reduced graphene oxide (rGO) or graphene with high specific surface area and high electrical conductivity , and also can maintain layers at a low number .…”

Section: Introductionmentioning

confidence: 99%

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Tuning the Surface Chemistry of Graphene Oxide for Enhanced Dielectric and Actuated Performance of Silicone Rubber Composites

Panahi‐Sarmad

Chehrazi

Noroozi

et al. 2019

ACS Appl. Electron. Mater.

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The influence of reduction temperature on the electromechanical properties and actuation behavior of polydimethylsiloxane (PDMS) dielectric elastomer containing the thermally reduced graphene oxide (rGO) with different surface chemistry has been systematically investigated. A set of rGO nanosheets was prepared by thermal reduction of graphene oxide (GO) at four temperatures (150, 200, 300, and 400 °C). The dielectric permittivity, dielectric loss, and elastic modulus of PDMS composites were increased, while the electrical breakdown strength of composites was decreased with an increase of the reduction temperature of GO. A thermodynamic model applied for studying the electromechanical deformation and stability of PDMS/GO(rGO-x) dielectric elastomer composites showed that the optimum value of the break-point was observed in PDMS/rGO-300. It is shown for the first time that the variation of electromechanical instability and recovery behavior are attributed to the surface chemistry of rGOs. A critical reduction temperature is observed at 300 °C which can be considered as proper rGO nanosheets for electromechanical applications. By employing an equivalent circuit on impedance spectroscopy, the interfacial polarization is recognized as the dominant mechanism rather than the intrinsic polarization of the matrix and nanosheets. Noteworthy, PDMS composites containing rGO, reduced at higher temperatures, have more interfacial polarized charges at the interface.

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A new low moduli dielectric elastomer nano-structured composite with high permittivity exhibiting large actuation strain induced by low electric field

Cited by 43 publications

References 36 publications

Smart materials for changing the electrical properties of nanostructures

Smart materials for changing the electrical properties of nanostructures

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

Tuning the Surface Chemistry of Graphene Oxide for Enhanced Dielectric and Actuated Performance of Silicone Rubber Composites

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