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首页> 外文会议>International Conference on Electrical Materials and Power Equipment >Effect of Fullerene Nanoparticle on Tuning Trap Level Distribution of Fullerene/Polyethylene Nanocomposites
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Effect of Fullerene Nanoparticle on Tuning Trap Level Distribution of Fullerene/Polyethylene Nanocomposites

机译：富勒烯纳米颗粒对富勒烯/聚乙烯纳米复合材料陷阱能级分布的影响

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Accumulation and distribution of space charge in polyethylene-based insulation will lead to local electric field distortion and insulation failure. Investigations on tuning trap level of polyethylene are of great significance to suppress space charge accumulation and improve the reliability of HVDC cables. In this paper, fullerene (C60) nanoparticles were used to adjust the trap level distribution in low density polyethylene (LDPE). The C60/LDPE nanocomposites treated by silane coupling agent KH550 with filler contents of 0, 0.005 and 0.01 wt% were prepared. In order to verify the effect of KH550, the untreated C60/LDPE nanocomposites with filler contents of 0.005 and 0.01 wt% were also prepared as reference. The trap distribution of C60/LDPE nanocomposites with different contents of C60 was studied by isothermal surface potential decay (ISPD) experiments. The results show that C60 can tune the trap level distribution of C60/LDPE nanocomposites. With the content of C60 increasing from 0 to 0.01 wt%, the trap level of C60/LDPE nanocomposites increases first and then decreases, when the content of C60 is 0.005 wt% and treated by KH550, the best modification effect is obtained. In addition, KH550 treated C60/LDPE nanocomposites have higher trap levels and lower carrier mobility than untreated C60/LDPE nanocomposites when C60 content is 0.005 wt% and 0.01 wt% respectively, indicating that well dispersed C60 introduces more deep traps for LDPE. With the temperature increasing from 25 to 80 °C, the charges trapping in the deep trap sites are more likely to detrap, resulting in the increase of apparent deep trap levels. It is deduced that large quantities of deep traps distributed in the C60/LDPE interfacial regions play an important role in the modification of deep trap levels and reduction of carrier mobility.
机译：聚乙烯基绝缘中空间电荷的积累和分布将导致局部电场变形和绝缘失效。研究聚乙烯的陷阱能级对抑制空间电荷的积累和提高高压直流输电电缆的可靠性具有重要意义。在本文中，富勒烯（C60）纳米颗粒用于调节低密度聚乙烯（LDPE）中的陷阱能级分布。制备了用硅烷偶联剂KH550处理的C60 / LDPE纳米复合材料，其填充剂含量为0、0.005和0.01 wt％。为了验证KH550的效果，还制备了填料含量为0.005和0.01wt％的未处理的C60 / LDPE纳米复合材料作为参考。通过等温表面电势衰减（ISPD）实验研究了不同C60含量的C60 / LDPE纳米复合材料的陷阱分布。结果表明，C60可以调节C60 / LDPE纳米复合材料的陷阱能级分布。随着C60含量从0增加到0.01 wt％，C60 / LDPE纳米复合材料的捕集能级先上升然后下降，当C60的含量为0.005 wt％并用KH550处理时，可获得最佳的改性效果。另外，当C60含量分别为0.005wt％和0.01wt％时，与未处理的C60 / LDPE纳米复合物相比，KH550处理的C60 / LDPE纳米复合物具有更高的陷阱水平和更低的载流子迁移率，表明充分分散的C60为LDPE引入了更深的陷阱。随着温度从25升高到80°C，深陷阱区域中捕获的电荷更容易被捕获，从而导致表观深陷阱水平增加。可以推断，分布在C60 / LDPE界面区域的大量深阱在改变深阱能级和降低载流子迁移率中起着重要作用。

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