DC breakdown and flashover characteristics of direct fluorinated epoxy/Al<sub>2</sub>O<sub>3</sub> nanocomposites

Wang, Feipeng; Zhang, Tao; Li, Jian; Zeeshan, Khan Muhammad; He, Li; Huang, Zhengyong; He, Yushuang

doi:10.1109/tdei.2019.8726018

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…In terms of trapping characteristics, the improved electrical performance of polymer insulation is highly related to the trap distribution modified by nanofillers [27–32]. It is also indicated by the suppressed DC conductivity of the OvPOSS/PP nanocomposites, shown in Figure 5.…”

Section: Resultsmentioning

confidence: 99%

Octavinyl polyhedral oligomeric silsesquioxane on tailoring the DC electrical characteristics of polypropylene

et al. 2021

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This work reports the effect of octavinyl polyhedral oligomeric silsesquioxane (OvPOSS) on tuning the electrical performance of polypropylene (PP). OvPOSS with different content are introduced into PP using the solution method. The microstructural morphology, crystallinity behaviour, breakdown strength, DC conductivity, space charge formation, and trapping level distribution are measured. The results indicate that the OvPOSS nanofiller can be dispersed uniformly with a doping content of 2.0 phr or less. The DC conductivity is decreased, and the breakdown strength of OvPOSS/PP nanocomposites is significantly increased. The space charge accumulation of the OvPOSS/PP nanocomposites is significantly suppressed due to the introduction of deeper traps by the OvPOSS nanofiller. Finally, the experimental results demonstrate that the OvPOSS nanofiller can greatly increase the electrical performance of the base PP and the OvPOSS/PP nanocomposites have much potential for HVDC applications. They further demonstrate that the PP is environmental-friendly due to its thermo-plastic property, which can be recycled after the manufacture.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Resultsmentioning

confidence: 99%

Octavinyl polyhedral oligomeric silsesquioxane on tailoring the DC electrical characteristics of polypropylene

et al. 2021

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“…As shown in figure 8, we compare the increase of flashover voltage with the existing works on flashover voltage improvement in recent years. Studies [14,33,36,37] and [29,[38][39][40][41] refer to the doping of chemically modified and plasmamodified fillers, respectively. Research of [25,[42][43][44][45][46] chose direct surface modification by coating or plasma treatment.…”

Section: Surface Flashovermentioning

confidence: 99%

Enhanced surface insulation for SiO₂/epoxy resin composites through co-modification of nanofiller with silane coupling agent and plasma

Cheng

Sun

et al. 2023

J. Phys. D: Appl. Phys.

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To enhance the surface insulation properties of SiO2/epoxy resin composites, the SiO2 filler is co-modified with a chemical method and dielectric barrier discharge (DBD) plasma in this work. The effects on the micro-structures, electrical parameters and surface insulation properties of the materials are studied. The results show that chemical modification using the silane coupling agent (KH550) can effectively introduce organo-functional groups into SiO2 filler. On the other hand, plasma modification shows little effect on the organo-functional group but significantly increases the dispersity of the nanoparticles, therefore reducing filler conglobation in epoxy resin composite. The composite samples with SiO2 doping concentration of 1 wt.%, 2 wt.%, 3 wt.%, 5 wt.% and 7 wt.% are prepared and characterized. It is found that the synergy of chemical and plasma methods could significantly improve the surface insulation of composite samples. Through doping 2 wt.% of the co-modified SiO2 filler, the direct current flashover voltage of the composites in dry air at atmospheric pressure can be increased to 1.53 times of the pure epoxy. The enhanced surface insulation properties are explained by the trap effect and the change of electrical parameters through the co-modification process.

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“…Al 2 O 3 nanoparticles have been widely applied for industrial use because they could improve the thermal stability, mechanical properties and corona resistance of composites. The further research studies revealed that there are a large number of uncoordinated atoms and defects on the surface of the nanofillers, which can trap the carriers in the nanopolymers and limit the charge movement [4,31,32]. The addition of carbon nanotubes would increase the surface conductivity.…”

Section: Physical Modelmentioning

confidence: 99%

The synergistic effect of micro structure/nanofiller/superhydrophobicity on the surface flashover

Xie

Wang

et al. 2022

High Voltage

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The surface flashover is affected by many factors, such as surface roughness, nanofillers and chemical functional groups. In this research study, polyamide mesh was utilised as a scaffold to systematically study the synergistic effect of micro structure/nanofiller/ superhydrophobicity on the surface flashover. Based on the dissolution and resolidification method, nanofillers were partially embedded into the mesh fabrics. Here, Al 2 O 3 nanoparticles were used as a typical non-conductive nanofiller, and carbon nanotubes were used as a typical conductive nanofiller. Moreover, the micro structure was determined by altering the mesh size, and chemical fluorination was utilised to change the surface chemical group. It was found that the polyamide mesh with 300# demonstrated best anti-flashover properties. Chemical fluorination could effectively improve the flashover voltage. By further adjusting the ratio of Al 2 O 3 to carbon nanotubes, the flashover voltage can be increased by up to 30%.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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DC breakdown and flashover characteristics of direct fluorinated epoxy/Al₂O₃ nanocomposites

Cited by 6 publications

References 25 publications

Octavinyl polyhedral oligomeric silsesquioxane on tailoring the DC electrical characteristics of polypropylene

Octavinyl polyhedral oligomeric silsesquioxane on tailoring the DC electrical characteristics of polypropylene

Enhanced surface insulation for SiO₂/epoxy resin composites through co-modification of nanofiller with silane coupling agent and plasma

The synergistic effect of micro structure/nanofiller/superhydrophobicity on the surface flashover

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DC breakdown and flashover characteristics of direct fluorinated epoxy/Al2O3 nanocomposites

Cited by 6 publications

References 25 publications

Octavinyl polyhedral oligomeric silsesquioxane on tailoring the DC electrical characteristics of polypropylene

Octavinyl polyhedral oligomeric silsesquioxane on tailoring the DC electrical characteristics of polypropylene

Enhanced surface insulation for SiO2/epoxy resin composites through co-modification of nanofiller with silane coupling agent and plasma

The synergistic effect of micro structure/nanofiller/superhydrophobicity on the surface flashover

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DC breakdown and flashover characteristics of direct fluorinated epoxy/Al₂O₃ nanocomposites

Enhanced surface insulation for SiO₂/epoxy resin composites through co-modification of nanofiller with silane coupling agent and plasma