Electrical discharge resistance of polymeric nanocomposites

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IET Nanodielectrics Pub Date : 2021-04-08 DOI:10.1049/nde2.12019
Srijib Banerjee, Shelly Saini, Shakthi Prasad D
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引用次数: 3

Abstract

The trend of choosing insulating materials has changed in the past few decades, and a considerable shift has occurred from conventional ceramic to non-ceramic insulating materials. The addition of inorganic fillers has greatly improved the thermal conductivity, discharge resistance, hydrophobicity recovery, and vandalism-resistance properties of polymeric insulating materials. Since the beginning of the present century, the field of nanomaterial research has gained much attention. Several studies have been conducted to investigate and analyze polymer nanocomposites by adding nanoparticles of varying size and concentration as fillers. The aim is to improve the characteristics and reformation of thermal, electrical, and mechanical properties of existing polymeric insulation materials. However, certain inconsistencies are prevalent with results obtained for polymer nanocomposites. A comprehensive review is presented based on available literature focussing on the advancement from polymeric insulating materials to polymeric nanocomposites and its impact on partial discharge resistance, surface charging, and tracking and erosion resistance. It is observed that the weight percent and dispersion of nano- or micro-sized particles into the base polymer matrix governs the performance of polymer composites. At higher filler loading, resistance to partial discharge and tracking and erosion decreases as a result of the agglomeration of fillers, whereas resistance to surface charge accumulation increases at higher filler loading because the formation of shallow traps increases the charge decay rate. It is suggested that when both micro- and nanofillers are mixed in proper proportion, micro–nano hybrid composites provide better performance than composites filled with only nano- or microfillers.

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高分子纳米复合材料的放电电阻
在过去的几十年里,绝缘材料的选择趋势发生了变化,从传统的陶瓷绝缘材料到非陶瓷绝缘材料发生了相当大的转变。无机填料的加入大大提高了高分子绝缘材料的导热性能、放电性能、疏水性恢复性能和抗破坏性能。自本世纪初以来,纳米材料的研究领域受到了广泛的关注。通过添加不同尺寸和浓度的纳米颗粒作为填料,对聚合物纳米复合材料进行了研究和分析。目的是改进现有聚合物绝缘材料的特性,并对其热学、电学和力学性能进行改造。然而,某些不一致的结果普遍存在于聚合物纳米复合材料中。本文在现有文献的基础上,对聚合物绝缘材料到聚合物纳米复合材料的发展及其对局部放电电阻、表面充电、跟踪和耐侵蚀性能的影响进行了综述。研究发现,纳米或微米颗粒在聚合物基体中的重量百分比和分散程度决定了聚合物复合材料的性能。在较高的填料负荷下,由于填料的团聚,对局部放电、跟踪和侵蚀的阻力降低,而在较高的填料负荷下,对表面电荷积累的阻力增加,因为浅层陷阱的形成增加了电荷衰减率。结果表明,当微纳填料以适当的比例混合时,微纳混杂复合材料的性能优于只填充纳米填料或微纳填料的复合材料。
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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
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