A mussel-like inspired modification of BaTiO3 nanopartciles using catechol/polyamine co-deposition and silane grafting for high-performance dielectric elastomer composites

Yang, Dan; Ni, Yufeng; Kong, Xinxin; Wang, Yanxin; Zhang, Liqun

doi:10.1016/j.compositesb.2019.05.101

Cited by 41 publications

(28 citation statements)

References 33 publications

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“…The surface profiles of pure SR and SR/CuPc composite films were also characterized by using an ultra-depth 3D digital microscope. As can be seen from Figures 4 (i-l This is mainly attributed to the reinforcing effect of CuPc particles [9]. Concurrently, the elongation at break of SR/CuPc composite films also increases with the increasing CuPc content.…”

Section: Resultsmentioning

confidence: 69%

The 3D printing of dielectric elastomer films assisted by electrostatic force

Wang

Zhou

et al. 2020

Smart Mater. Struct.

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Compared with traditional methods for preparing dielectric elastomer (DE) films, electrohydrodynamic (EHD) 3D printing displays many advantages, notably full automation, computer control and flexible design. It also confers high printing resolution, high preparation efficiency with minimal probability of nozzle clogging. In this article, EHD 3D printing was employed to fabricate silicone rubber (SR) based DE films. In order to increase their dielectric constant, high dielectric copper phthalocyanine (CuPc) particles were added into the SR ink. Optimal printing

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Section: Resultsmentioning

confidence: 69%

The 3D printing of dielectric elastomer films assisted by electrostatic force

Wang

Zhou

et al. 2020

Smart Mater. Struct.

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“…The peak at 286.20 eV can be attributed to CO bonds, and the peak at 285.35 eV is assigned to C‐Si bonds. [ 33 ] In addition, the C1s peak intensity of BT‐Si747 is higher than that of BT, and the increased carbon content is undoubtedly derived from Si747. The S2p spectrum of BT‐Si747 (Figure 2F) is resolved into two peaks at 162.60 eV (S2p 3/2 ) and 163.60 eV (S2p 1/2 ), which is ascribed to the CS bonds.…”

Section: Resultsmentioning

confidence: 99%

“…Another is to modify BT nanoparticles by silane coupling agents to improve the dispersion, such as 3‐aminopropyltriethoxysilane (KH550), [ 32 ] γ‐(2,3‐epoxypropoxy)‐propytrimethoxysilane (KH560), [ 33 ] γ‐methacryloxypropyl trimethoxy silane (KH570), [ 34 ] bis‐(γ‐triethoxysilylpropyl)‐tetrasulfide (KH845‐4). [ 35 ] By using a silane coupling agent, a “molecular bridge” can be set up at the interface between inorganic and organic substances, connecting two materials with different properties.…”

Section: Introductionmentioning

confidence: 99%

Ternary silicone dielectric elastomer micro‐nanocomposites with enhanced mechanical and electromechanical properties

et al. 2020

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In this paper, ternary silicone dielectric elastomer micro‐nanocomposites were prepared by mixing barium titanate (BT) nanoparticles or 3‐mercaptopropylethoxy‐bis(tridecyl‐pentaethoxy‐siloxane) (Si747)‐modified BT (BT‐Si747) with hexagonal boron nitride (BN) microplatelets into methyl vinyl silicone rubber (MVSR). BN platelets as physical barriers improve the dispersion of BT nanoparticles, so the MVSR/BT/BN composites achieve the higher electric breakdown field. The Si747 in MVSR/BT‐Si747/BN composites can be grafted on BT nanoparticles surface while the mercapto groups of Si747 can react with double bonds of MVSR, which increases interfacial interaction to improve the mechanical property. As a result, the tensile strength and elongation at break of MVSR/30 wt%BT‐Si747/30 wt%BN composite are 3.43 MPa and 2705%, which is 2.4 and 4.4 times as high as the MVSR/30 wt%BT/30 wt%BN composite, respectively. The MVSR/BT‐Si747/BN composites exhibit higher actuation performance under lower electric fields due to simultaneous increase in dielectric constant and decrease in elastic modulus. The MVSR/10 wt%BT‐Si747/10 wt%BN composite obtains an actuated strain of 8.81% at 47.48 kV/mm, which is twice as high as pure MVSR (4.4% at 60.21 kV/mm). The used method in this experiment is simple, effective, and low cost, and prepared ternary micro‐nanocomposites have potential applications in dielectric actuators.

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“…Consequently, it is possible to obtain DEs with an improved electro-actuation ability by employing core-shell structures as functional fillers. Yang et al [ 32 ] prepared epoxy-functionalized silane@poly(catechol/polyamine)@BT core-shell nanoparticles. Due to its positive contribution to both dispersion and interfacial interaction, 13.4% actuation strain was obtained from the natural rubber-based composite filled with 50 phr fillers at 90 kV∙mm −1 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electromechanical Property of Silicone Elastomer Composites Containing TiO2@SiO2 Core-Shell Nano-Architectures

et al. 2021

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Dielectric elastomer (DE) is one type of promising field-activated electroactive polymer. However, its significant electromechanical actuated properties are always obtained under a giant electric voltage, which greatly restricts the potential applications of DE. In the present work, the well-constructed core-shell TiO2@SiO2 nanoparticles were fabricated by using the classical Stöber method. A series of TiO2@SiO2 nano-architectures-filled polydimethylsiloxane (PDMS) composites were prepared via solution blending and compression-molding procedures. Benefiting from the additional SiO2 shell, both the interfacial compatibility between fillers and matrix and core-shell interfacial interaction can be improved. The TiO2@SiO2/PDMS nanocomposites exhibit a significantly enhanced in-plane actuated strain of 6.08% under a low electric field of 30 V·μm−1 at 16 vol.% TiO2@SiO2 addition, which is 180% higher than that of neat PDMS. The experimental results reveal that the well-designed core-shell structure can play an important role in both improving the electromechanical actuated property and maintaining a good flexibility of DE composites. This research provides a promising approach for the design of the novel composites with advanced low-field actuated electromechanical property in next generation DE systems.

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A mussel-like inspired modification of BaTiO3 nanopartciles using catechol/polyamine co-deposition and silane grafting for high-performance dielectric elastomer composites

Cited by 41 publications

References 33 publications

The 3D printing of dielectric elastomer films assisted by electrostatic force

The 3D printing of dielectric elastomer films assisted by electrostatic force

Ternary silicone dielectric elastomer micro‐nanocomposites with enhanced mechanical and electromechanical properties

Enhanced Electromechanical Property of Silicone Elastomer Composites Containing TiO2@SiO2 Core-Shell Nano-Architectures

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