Mechanical, dielectric and actuated properties of carboxyl grafted silicone elastomer composites containing epoxy-functionalized TiO2 filler

Liu, Xueying; Sun, Haibin; Liu, Suting; Jiang, Yingjie; Yu, Bing; Ning, Nanying; Tian, Ming; Zhang, Liqun

doi:10.1016/j.cej.2020.124791

Cited by 59 publications

(46 citation statements)

References 52 publications

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“…[195,[197][198][199][200] Also, to generate the largest possible actuation at high voltages, a high dielectric breakdown strength is favorable for DEAs. Today, elastomers used for DEAs have included silicone, [201][202][203] acrylic elastomers, [204][205][206] polyurethane, [207][208][209] natural rubber, [210] and styrenic-based block copolymers. [211,212]…”

Section: Deasmentioning

confidence: 99%

“…This is ascribed to interfacial polarization effects (Maxwell-Wagner-Sillar relaxation) from the accumulation of charges at the filler/matrix interface. [199] Generally, extrinsic enhancement approaches adopted include 1) the addition of high dielectric ceramic powders such as barium titanate (BaTiO 3 ) and titanium dioxide (TiO 2 ) [202,221,222] ; 2) conductive particles such as aluminum nanoparticles, polyaniline, and graphene [207,[223][224][225] ; 3) polymer blends [226] ; and more recently 4) liquid fillers such as liquid metal and ionic liquid that are mixed with the elastomer matrix. [227][228][229] While extrinsic enhancements have been successful to enhance the elastomer dielectric constant, they often come at a trade-off of either increased elastic modulus, higher dielectric loss, lower dielectric breakdowns and greater leakage currents.…”

Section: Designing Low-voltage Deasmentioning

confidence: 99%

“…[220] For improved interfacial compatibility, surface modification of fillers has been undertaken to chemically or physically anchor these fillers to the elastomer matrix. [202,210,224,230,231] Alternatively, simultaneous addition of two differing fillers have been explored, at which one acts as a physical barrier to avoid agglomeration of the other. [232] The addition of ceramic fillers has been successful in enhancing the dielectric constant of elastomers, but this is often achieved at higher filler contents that increase the elastic modulus.…”

Section: Designing Low-voltage Deasmentioning

confidence: 99%

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Low‐Voltage Soft Actuators for Interactive Human–Machine Interfaces

Chen

Tan

Gong

et al. 2021

Advanced Intelligent Systems

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Soft electrical actuators driven by low voltages are promising for interactive human-machine interfaces (iHMI) applications including executing orders to complete various tasks and communicating with humans. The attractive features of low-voltage soft electrical actuators include their good safety, low power consumption, small system size, and nonrigid or deformable characteristics. This review covers three typical classes of electrical actuators, namely, electrochemical, electrothermal, and other electrical (dielectric, electrostatic, ferroelectric, and plasticized gel) actuators according to their mechanism and working potential range. For each kind of actuators, the advantages, working principle, device configuration/design, materials selection, recent progress, and potential applications for iHMI are summarized, with the strategies for enhancing the actuation performance under low voltages being highlighted. Finally, the challenges for those soft actuators and possible solutions are discussed.

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Section: Deasmentioning

confidence: 99%

Section: Designing Low-voltage Deasmentioning

confidence: 99%

Section: Designing Low-voltage Deasmentioning

confidence: 99%

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Low‐Voltage Soft Actuators for Interactive Human–Machine Interfaces

Chen

Tan

Gong

et al. 2021

Advanced Intelligent Systems

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“…[3] For example, various materials in the fields such as electrical and electronic, aerospace, and other products require not only good thermal performance but also the insulation properties. [4][5][6][7] Therefore, the development of polymer composites such as SR with both improved thermal and mechanical performance is of great significance.…”

Section: Introductionmentioning

confidence: 99%

A silicon rubber composite with enhanced thermal conductivity and mechanical properties based on nanodiamond and boron nitride fillers

Fan

Mukerabigwi

et al. 2021

Polymer Composites

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Silicone rubber (SR) is a nonreactive and stable material that is widely applied in a wide variety of products including electrical and electronic appliances.Currently, the synthesis of SR with enhanced thermal conductivity and mechanical properties is of great significance. Herein, an improved thermal conductive SR composite was synthesized by using nanodiamond (ND) and boron nitride (BN) as composite thermal conductivity fillers to the terminal hydroxyl functional group of SR. We studied the thermal conductivity and mechanical properties of the composites as well as the effects of different ratios of BN and ND fillers on the properties of SR composite. The results show that the thermal conductivity of the SR composite filled with 6 phr ND and 70 phr BN was up to 0.82 W/m K, which was remarkably increased by 70.83% than that of modified by a single filler (i.e., 70 phr BN). Moreover, the SR composite prepared with dual fillers (BN-ND) showed better thermal stability, and the maximum thermal degradation temperature that was higher than that of the composite prepared with a single filler and pure SR. Furthermore, the mechanical properties of the sample indicators were found to be better than those of the currently available similar products on the market.

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“…The dielectric elastomer transducer (DET) has been a hot area of research in recent decades due to its high flexibility, light weight, large mechanical strain, simple structure and low cost [ 1 , 2 , 3 , 4 ]. A typical DET device consists of a dielectric elastomer (DE) film sandwiched by two compliant electrodes [ 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Deep Insight into the Influences of the Intrinsic Properties of Dielectric Elastomer on the Energy-Harvesting Performance of the Dielectric Elastomer Generator

Jiang

Yang

et al. 2021

Polymers

Self Cite

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The dielectric elastomer (DE) generator (DEG), which can convert mechanical energy to electrical energy, has attracted considerable attention in the last decade. Currently, the energy-harvesting performances of the DEG still require improvement. One major reason is that the mechanical and electrical properties of DE materials are not well coordinated. To provide guidance for producing high-performance DE materials for the DEG, the relationship between the intrinsic properties of DE materials and the energy-harvesting performances of the DEG must be revealed. In this study, a simplified but validated electromechanical model based on an actual circuit is developed to study the relationship between the intrinsic properties of DE materials and the energy-harvesting performance. Experimental verification of the model is performed, and the results indicate the validity of the proposed model, which can well predict the energy-harvesting performances. The influences of six intrinsic properties of DE materials on energy-harvesting performances is systematically studied. The results indicate that a high breakdown field strength, low conductivity and high elasticity of DE materials are the prerequisites for obtaining high energy density and conversion efficiency. DE materials with high elongation at break, high permittivity and moderate modulus can further improve the energy density and conversion efficiency of the DEG. The ratio of permittivity and the modulus of the DE should be tailored to be moderate to optimize conversion efficiency (η) of the DEG because using DE with high permittivity but extremely low modulus may lead to a reduction in η due to the occurrence of premature “loss of tension”.

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Mechanical, dielectric and actuated properties of carboxyl grafted silicone elastomer composites containing epoxy-functionalized TiO2 filler

Cited by 59 publications

References 52 publications

Low‐Voltage Soft Actuators for Interactive Human–Machine Interfaces

Low‐Voltage Soft Actuators for Interactive Human–Machine Interfaces

A silicon rubber composite with enhanced thermal conductivity and mechanical properties based on nanodiamond and boron nitride fillers

Deep Insight into the Influences of the Intrinsic Properties of Dielectric Elastomer on the Energy-Harvesting Performance of the Dielectric Elastomer Generator

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