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首页> 外文期刊>Electric power systems research >Multiple enhancement of PVC cable insulation using functionalized SiO_2 nanoparticles based nanocomposites
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Multiple enhancement of PVC cable insulation using functionalized SiO_2 nanoparticles based nanocomposites

机译：使用功能化的SiO_2纳米颗粒基纳米复合材料多次增强PVC电缆的绝缘性能

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Manufacturing of a new insulation material for power cables has become necessary in order to withstand electrical and mechanical stresses. The current study aims to enhance the dielectric and mechanical properties of Polyvinyl Chloride (PVC), one of the wide used power cable insulation, by the insertion of chemically modified silica (silicon dioxide, SiO2) nanoparticles. The surface functionalization of the inserted SiO2 nanoparticles was performed using amino silane coupling agent, and the PVC/SiO2 nanocomposites were synthesized with different concentrations of nanoparticles. The surface morphology and chemical structure of the prepared samples were characterized by field emission scanning electron microscopy (FE-SEM) and Fourier transformation infrared spectroscopy (FT-IR). The mechanical properties of the obtained nanocomposites showed that the insertion of functionalized nanoparticles is able to increase the tensile strength and the Young's modulus of samples, however it decreases their elongation. In addition, the dielectric properties of PVC/SiO2 nanocomposites, such as relative permittivity (epsilon(r)) and dielectric loss (tan delta), were also measured in a frequency range of 20 Hz-1 MHz. Moreover, AC breakdown voltage of the prepared samples was measured under uniform and non-uniform field, and AC dielectric strength was evaluated using finite element method (FEM) for non-uniform and uniform field. For further evaluation, DC dielectric strength was also measured under uniform field. The obtained data revealed that PVC/SiO2 nanocomposites with functionalized SiO2 nanoparticles exhibited better dielectric properties compared to that with un-functionalized one or that of neat PVC. The physical mechanisms behind the obtained enhancements have been discussed. (C) 2017 Elsevier B.V. All rights reserved.
机译：为了承受电气和机械应力，必须制造用于电力电缆的新型绝缘材料。当前的研究旨在通过插入化学改性的二氧化硅（二氧化硅，SiO2）纳米粒子来增强聚氯乙烯（PVC）的介电和机械性能，聚氯乙烯是一种广泛使用的电力电缆绝缘材料。使用氨基硅烷偶联剂对插入的SiO2纳米颗粒进行表面功能化，并合成了不同浓度的纳米颗粒的PVC / SiO2纳米复合材料。用场发射扫描电子显微镜（FE-SEM）和傅里叶变换红外光谱（FT-IR）对所制备样品的表面形貌和化学结构进行表征。所获得的纳米复合材料的机械性能表明，插入功能化的纳米颗粒能够提高样品的拉伸强度和杨氏模量，但会降低其伸长率。此外，还在20 Hz-1 MHz的频率范围内测量了PVC / SiO2纳米复合材料的介电性能，例如相对介电常数（ε）和介电损耗（tanδ）。此外，在均匀和不均匀的场下测量制备的样品的AC击穿电压，并使用有限元方法（FEM）评估AC介电强度用于不均匀和均匀的场。为了进一步评估，还测量了均匀电场下的直流介电强度。获得的数据表明，与未官能化的一种或纯净的PVC / SiO2纳米复合材料相比，具有未官能化的一种或两种的PVC / SiO2纳米复合材料表现出更好的介电性能。已经讨论了获得增强的背后的物理机制。 （C）2017 Elsevier B.V.保留所有权利。

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