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Inhibition Effect of Graphene Nanoplatelets on Electrical Degradation in Silicone Rubber

Inhibition Effect of Graphene Nanoplatelets on Electrical Degradation in Silicone Rubber

Tao Han, Boxue Du, Jingang Su, Yu Gao, Yunqi Xing, Shengchen Fang, Chuanyang Li, Zhipeng Lei

Polymers (Basel). 2019 Jun 3;11(6):968.

PMID: 31163613

Abstract:

Silicone rubber (SIR) is widely used as an insulation material in high voltage cable accessories. Electrical tree is a typical electrical degradation and is easily initiated because of the distorted electric field. In this study, graphene nanoplatelets at contents of 0.001-0.010 wt % (0.00044-0.00436 vol %) were added into SIR to improve the electrical tree inhibiting ability. Scanning electron microscopy, conductivity and surface potential decay tests were conducted to analyze the characteristics of graphene/SIR nanocomposites. The typical electrical treeing experiment was employed to observe the electrical tree inhibition of graphene in SIR. The results show that graphene nanoplatelets were well dispersed in SIR. The conductivity was higher after the addition of graphene nanoplatelets, and the trap distribution was affected by graphene nanoplatelets. The tree was changed from a bush-branch structure to a bush structure after the addition of graphene. Tree inception voltage improved and reached the highest mean value at 0.003 wt %. The tree length was inhibited at 0.001 to 0.007 wt % and the lowest tree length occurred at 0.005 wt %.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS71746	Graphene nanoplatelets			Price

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