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.

中文翻译：

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具有增强的机械和机电性能的三元硅氧烷介电弹性体微纳米复合材料

本文通过将钛酸钡（BT）纳米粒子或3-巯基丙基乙氧基-双（十三烷基-戊乙氧基-硅氧烷）（Si747）改性的BT（BT-Si747）与六方氮化硼混合制备三元硅氧烷介电弹性体微纳米复合材料。 BN）将微片放入甲基乙烯基硅橡胶（MVSR）中。BN血小板作为物理屏障可改善BT纳米颗粒的分散性，因此MVSR / BT / BN复合材料可实现更高的电击穿场。MVSR / BT‐Si747 / BN复合材料中的Si747可以接枝到BT纳米颗粒表面，而Si747的巯基可以与MVSR的双键反应，从而增加了界面相互作用，从而改善了机械性能。结果，MVSR / 30 wt％BT-Si747 / 30 wt％BN复合材料的拉伸强度和断裂伸长率为3.43 MPa和2705％，分别为2.4和4。分别是MVSR / 30 wt％BT / 30 wt％BN复合材料的4倍。MVSR / BT-Si747 / BN复合材料在较低的电场下表现出较高的驱动性能，这是由于介电常数同时增加和弹性模量下降所致。MVSR / 10 wt％BT-Si747 / 10 wt％BN复合材料在47.48 kV / mm时可获得8.81％的致动应变，是纯MVSR的两倍（在60.21 kV / mm时为4.4％）。本实验中使用的方法简单，有效且成本低廉，制备的三元纳米复合材料在电介质致动器中具有潜在的应用前景。MVSR / 10 wt％BT-Si747 / 10 wt％BN复合材料在47.48 kV / mm时可获得8.81％的致动应变，是纯MVSR的两倍（在60.21 kV / mm时为4.4％）。本实验中使用的方法简单，有效且成本低廉，制备的三元纳米复合材料在电介质致动器中具有潜在的应用前景。MVSR / 10 wt％BT-Si747 / 10 wt％BN复合材料在47.48 kV / mm时可获得8.81％的致动应变，是纯MVSR的两倍（在60.21 kV / mm时为4.4％）。本实验中使用的方法简单，有效且成本低廉，制备的三元纳米复合材料在电介质致动器中具有潜在的应用前景。