Effect of frequency on dielectric properties of TiO2/PDMS dielectric elastomers

Lu, Tingting; Liu, Qian; Xin, Sanfa; Peng, Dongxue

doi:10.1007/s11696-020-01117-1

Cited by 11 publications

(7 citation statements)

References 5 publications

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“…Compared the dielectric performance of the SR composites in this work with the published ones, [ 7–9 ] the permittivity has a large increase of more than 30%, from 2.79 to 3.63, which is larger than the increase (28%) in reference. [ 7 ] Besides, the loss tangent in this work (7.07 × 10 −4 ) is much less than that of other references (>0.4).…”

Section: Resultsmentioning

confidence: 92%

“…[7] Besides, the loss tangent in this work (7.07 Â 10 À4 ) is much less than that of other references (>0.4). [7][8][9] Therefore, compared with TiO 2 , codoped TiO 2 with colossal permittivity can enhance the dielectric performance of the SR composites. 3).…”

Section: Dielectric Performance Of the Codoped Tio 2 /Sr Compositesmentioning

confidence: 99%

“…The influence of frequency on the dielectric properties of the TiO 2 /PDMS (polydimethylsiloxane) composites was investigated. [ 8 ] Although the permittivity was increased to 6.4 at 1 kHz, the loss tangent was larger than 0.8. High permittivity was also achieved in the TiO 2 /silicone composites when 30 wt% TiO 2 was incorporated, while the loss tangent was 0.4.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Dielectric and Mechanical Performances of the (La + Nb) Codoped TiO₂/Silicone Rubber Composites

Zeng,

Tang,

2023

Physica Status Solidi (a)

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Silicone rubber (SR) has gained great interest because of its fast deformation response, low modulus, high rebound rate and wide temperature application range. However, their development is hampered by the low dielectric constant. Adding dielectric ceramics may be a solution. In this work, (La+Nb) co‐doped TiO2/SR composites were fabricated and their properties were systematically tested. By adding co‐doped TiO2, the performances of the composites were enhanced. High permittivity (3.63) and low loss tangent (7.07×10‐4) were gained in the SR composites with 30 wt% co‐doped TiO2. The evenly dispersed co‐doped TiO2 and the enhanced interfacial polarization effect can be responsible for this. The composites also exhibit enhanced tensile strength (565 kPa) and elongation (259%). In addition, the SR composites were thermally stable up to 415 °C. These superior properties can improve the electrodeformation performance of SR composites, which has great potential in the fields of flexible actuators, bionic flexible robots, next‐generation intelligent medical devices and green energy harvesting.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 92%

Section: Dielectric Performance Of the Codoped Tio 2 /Sr Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced Dielectric and Mechanical Performances of the (La + Nb) Codoped TiO₂/Silicone Rubber Composites

Zeng,

Tang,

2023

Physica Status Solidi (a)

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“…It can be explained that it can well complete the directional transfer of polar molecules and the interface polarization in the low‐frequency region, which greatly increased the charge on the surface of the medium, but these polarizations cannot be well completed in the high‐frequency region. [ 58 ] Overall, MMoS 2 reduced the ε ', especially MoS 2 ‐OH, MoS 2 ‐COOH, and MoS2‐LPO.…”

Section: Resultsmentioning

confidence: 99%

In Situ Incorporation of Liquid Polysulfide Oligomer Modified MoS₂ into Polysulfide Rubber (PSR) as Solid Crosslinker with Greatly Improved Dispersion Ability and Interfacial Interaction

Yin

Zhang

et al. 2022

Macro Materials & Eng

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Polysulfide rubber (PSR) is a versatile sealing material, but suffers from poor mechanical properties, which can be solved by increasing the crosslinking density and introducing fillers. In this study, functionalized molybdenum disulfide (MMoS2) by in situ incorporation with different thiol‐containing compounds is obtained. On the basis of the optimum content of 0.5 wt.%, the performance of MMoS2/PSR is systematically studied. The results show that the interfacial interaction between MMoS2 and the matrix is improved. In particular, PSR reinforced by MoS2 modified with polysulfide oligomer (MoS2‐LPO) behaves the most excellently. Its solvent resistance and crosslink density are also improved by 14.2% and 39.4%, respectively. The storage modulus of MoS2‐LPO/PSR is 394% higher than that of the unmodified one. This is attributed to the MoS2‐LPO playing the role of filler and large‐sized solid crosslinker at the same time. Through broadband dielectric spectroscopy (BDS), it is determined that MoS2‐LPO/PSR has the longest relaxation time due to the stronger interfacial interaction. In order to understand the effect of interfacial interaction between MoS2 and PSR on the properties of the composites more clearly, MoS2 modified with other functional groups are also discussed.

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“…Many studies show that adding ceramic fillers (titanium dioxide 3 and barium titanate 4,5 ), or conductive fillers (carbon nanotubes 6,7 and graphene 8,9 ) to silicone rubber can effectively improve the dielectric constant of silicone rubber. Yang et al 10 prepared barium titanate (BT)/silicone rubber dielectric composites with a dielectric constant of 3.8 when the fraction of BT was 30 wt%.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of CNTs/CaCu₃Ti₄O₁₂/silicone rubber composites with improved dielectric and mechanical properties

Zeng

Tang

2023

J of Applied Polymer Sci

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The dielectric performance of Silicone rubber (SR) composites can be significantly enhanced by carbon nanotubes. However, carbon nanotubes are easy to agglomerate in the polymer matrix. Adding low‐dimensional materials of different dimensions may be a solution. In this article, one‐dimensional multiwall carbon nanotubes (CNTs) and zero‐dimensional copper calcium titanate (CaCu3Ti4O12, CCTO) ceramic fillers were simultaneously added to prepare silicone dielectric elastomer composites. SEM results showed that the CNTs were distributed uniformly in the SR matrix due to the addition of CCTO. When 2 wt% CNTs and 10 wt% CCTO were added, the dielectric constant of the composite increased from 2.79 (pure silicone rubber) to 5.72, with a low loss tangent of 0.0012. Due to the uniform dispersion of CNTs with the addition of CCTO particles, dielectric performance of the composites were enhanced. The tensile stress was 986 kPa, the elongation at break was 333%, while the elastic modulus was not more than 613 kPa (2 wt% CNTs and 5 wt% CCTO in the SR composite). In addition, the composites had a wide temperature range up to 400°C. Therefore, the prepared CNTs/CCTO/SR composites have good dielectric and mechanical properties, and good thermal stability. It has a good reference value for this kind of composites as dielectric elastomer materials.

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Effect of frequency on dielectric properties of TiO2/PDMS dielectric elastomers

Cited by 11 publications

References 5 publications

Enhanced Dielectric and Mechanical Performances of the (La + Nb) Codoped TiO₂/Silicone Rubber Composites

Enhanced Dielectric and Mechanical Performances of the (La + Nb) Codoped TiO₂/Silicone Rubber Composites

In Situ Incorporation of Liquid Polysulfide Oligomer Modified MoS₂ into Polysulfide Rubber (PSR) as Solid Crosslinker with Greatly Improved Dispersion Ability and Interfacial Interaction

Preparation and characterization of CNTs/CaCu₃Ti₄O₁₂/silicone rubber composites with improved dielectric and mechanical properties

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Effect of frequency on dielectric properties of TiO2/PDMS dielectric elastomers

Cited by 11 publications

References 5 publications

Enhanced Dielectric and Mechanical Performances of the (La + Nb) Codoped TiO2/Silicone Rubber Composites

Enhanced Dielectric and Mechanical Performances of the (La + Nb) Codoped TiO2/Silicone Rubber Composites

In Situ Incorporation of Liquid Polysulfide Oligomer Modified MoS2 into Polysulfide Rubber (PSR) as Solid Crosslinker with Greatly Improved Dispersion Ability and Interfacial Interaction

Preparation and characterization of CNTs/CaCu3Ti4O12/silicone rubber composites with improved dielectric and mechanical properties

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Product

Resources

About

Enhanced Dielectric and Mechanical Performances of the (La + Nb) Codoped TiO₂/Silicone Rubber Composites

Enhanced Dielectric and Mechanical Performances of the (La + Nb) Codoped TiO₂/Silicone Rubber Composites

In Situ Incorporation of Liquid Polysulfide Oligomer Modified MoS₂ into Polysulfide Rubber (PSR) as Solid Crosslinker with Greatly Improved Dispersion Ability and Interfacial Interaction

Preparation and characterization of CNTs/CaCu₃Ti₄O₁₂/silicone rubber composites with improved dielectric and mechanical properties