Dielectric elastomer actuator with excellent electromechanical performance using slide-ring materials/barium titanate composites

Yang, Dan; Fengxing, Ge; Tian, Ming; Ning, Nanying; Zhang, Liqun; Zhao, Changming; Ito, Kohzo; Nishi, Toshio; Wang, Huaming; Luan, Yunguang

doi:10.1039/c5ta01182e

Cited by 94 publications

(51 citation statements)

References 61 publications

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“…The results also indicated that the uniform dispersion of TiO 2 -KH570 particles enhanced interfacial interaction between TiO 2 and SR matrix. Dan Yang et al 26 prepared a slide-ring material with a necklace-like molecular structure as dielectric elastomer materials. BT particles modied by KH570 were added into the SR materials to further increase the actuated performance.…”

Section: Introductionmentioning

confidence: 99%

Improved electromechanical properties of brominated butyl rubber filled with modified barium titanate

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Improved electromechanical properties of brominated butyl rubber filled with modified barium titanate

et al. 2017

Self Cite

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“…The combination of high‐permittivity ceramic particles such as BaTiO 3, PZT, ZrO 2 with relative permittivity's in excess of ε r = 1000 or electrically conducting nanoparticles such as graphene and carbon nanotubes, with dielectric elastomers has been considered to generate extrinsically enhanced polymer composites with increased dielectric properties . However, the large difference in relative permittivity and surface energy between the particles and polymer matrices only results in moderate enhancement of the dielectric properties of the composites, and is accompanied by a reduction in breakdown strength and mechanical flexibility, as well as large dielectric loss due to interfacial defects …”

Section: Extrinsic Approaches To Improve the Dielectric Properties Ofmentioning

confidence: 99%

Intrinsically Tuning the Electromechanical Properties of Elastomeric Dielectrics: A Chemistry Perspective

Ellingford

Bowen

McNally

et al. 2018

Macromol. Rapid Commun.

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Dielectric elastomers have the capability to be used as transducers for actuation and energy harvesting applications due to their excellent combination of large strain capability (100-400%), rapid response (10 s), high energy density (10-150 kJ m ), low noise, and lightweight nature. However, the dielectric properties of non-polar elastomers such as dielectric permittivity ε , breakdown strength E , and dielectric loss ε ″, need to be enhanced for real world applications. The introduction of polar groups or structures into dielectric elastomers through covalently bonding is an attractive approach to 'intrinsically' induce a permanent polarity to the elastomers, and can eliminate the poor post-processing issues and breakdown strength of extrinsically modified materials, which have often been prepared by incorporation of fillers. This review discusses the chemical methods for modification of dielectric elastomers, such as hydrosilylation, thiol-ene click chemistry, azide click chemistry, and atom transfer radical polymerization. The effects of the type and concentration of polar groups on the dielectric and mechanical properties of the elastomers and their performance in actuation and harvesting systems are discussed. State-of-the-art developments and perspectives of modified dielectric elastomers for deformable energy generators and transducers are provided.

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“…Polymer‐based nanocomposites with high dielectric constants (high‐k) have attracted extensive attention for their applications in embedded capacitors, actuators, energy storage devices, and so forth . These materials combine the advantages of fillers, such as high dielectric constant and good electrical conductivity, as well as the merits of polymers, such as proper processing, flexibility, mechanical properties, and high breakdown strength.…”

Section: Introductionmentioning

confidence: 99%

Integration of PDA Chemistry and Surface‐Initiated ATRP to Prepare Poly(methyl methacrylate)‐Grafted Carbon Nanotubes and Its Effect on Poly(vinylidene fluoride)–Carbon Nanotube Composite Properties

Song

Xia

Wei

et al. 2019

Macro Materials & Eng

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NanocompositesPoly(methyl methacrylate)-grafted carbon nanotubes (PMMA@MWCNTs) are nondestructively prepared via the integration of mussel-inspired polydopamine (PDA) chemistry and the surface-initiated atom transfer radical poly merization (ATRP) method. The structures and properties of the poly(vinylidene fluoride)-based (PVDF-based) nanocomposites filled with pristine MWCNTs and PMMA@MWCNTs are investigated. The results show that the encapsulation of PMMA on the MWCNTs surface not only improves the dispersibility of MWCNTs in the PVDF matrix but also enhances the interfacial interaction between MWCNTs and PVDF. The addition of PMMA@MWCNTs nanofillers to PVDF can effectively induce the crystal structure of PVDF to transform from the α-phase to the β/γ -phase, and nearly 100% β/γ -phase PVDF formed when the nanofiller loading is higher than 5 wt%. Compared with the MWCNTs/PVDF composites, the PMMA@MWCNTs/PVDF composites exhibit obvious improvement in the percolation threshold because the PMMA shells hinder the direct contact of the MWCNTs. Moreover, the loss tangent of the PMMA@MWCNTs/PVDF composites is effectively suppressed due to the reduced leakage current in the composites and the enhanced interfacial strength between the nanofiller and the matrix.

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Dielectric elastomer actuator with excellent electromechanical performance using slide-ring materials/barium titanate composites

Abstract: A dielectric elastomer actuator with excellent electromechanical performance was fabricated by incorporating modified barium titanate into slide-ring materials with necklace-like molecular structure.

Cited by 94 publications

References 61 publications

Improved electromechanical properties of brominated butyl rubber filled with modified barium titanate

Improved electromechanical properties of brominated butyl rubber filled with modified barium titanate

Intrinsically Tuning the Electromechanical Properties of Elastomeric Dielectrics: A Chemistry Perspective

Integration of PDA Chemistry and Surface‐Initiated ATRP to Prepare Poly(methyl methacrylate)‐Grafted Carbon Nanotubes and Its Effect on Poly(vinylidene fluoride)–Carbon Nanotube Composite Properties

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