Research on Improving the Partial Discharge Initial Voltage of SiC/EP Composites by Utilizing Filler Surface Modification and Nanointerface Interaction

Author:

Song Xupeng,Yang Wei,Huo Shouchao,Wang Kun,Wu Yuanyuan,Chen Yun,Qiao Jian,Shen BoyangORCID,Bian XingmingORCID

Abstract

SiC/EP composites are promising insulating materials due to their high thermal conductivity, stable chemical properties, and nonlinear electrical conductivity. However, the compatibility of micron-sized SiC particles with the organic polymer matrix is poor, and defects such as air gaps may be introduced at the interface, which reduces the partial discharge resistance of the composite materials. In order to improve the partial discharge initial voltage (PDIV) of SiC/EP composites, in this paper, SiC/EP composites with different proportions were prepared by surface modification of filler and compound of micro/nano particles. Firstly, a method of secondary modification of SiC particles was proposed, which was first modified by alkali washing and then silane coupling agent KH560, and the effectiveness of the modification was verified. Therefore, the interface bonding ability between the filler and the matrix was improved, the air gap defects at the interface were reduced, and the PDIV of the composite material was improved. When the filling ratio is 10 wt%, the PDIV was enhanced by 13.75%, and when the filling ratio was further increased, the improvement was reduced. In contrast, the introduction of nanoparticles into the composites can effectively improve the PDIV of composite materials. In this study, nanoparticles were used to form a shell-core structure in epoxy resins to exert their huge specific surface area and active surface properties, thereby changing the overall crosslinking properties of the composites. Through experimental research, the optimal micro-nano particle compounding ratio was explored. Under the optimal mixing ratio, the PDIV of the composite material can be increased by more than 90%.

Funder

State Key Laboratory of Advanced Power Transmission Technology

Publisher

MDPI AG

Subject

Polymers and Plastics,General Chemistry

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Partial discharge characteristics from polymer insulator under various contaminant;Electric Power Systems Research;2024-11

2. Mechanical and tribological properties of silicon carbide /carbon fiber/epoxy resin based composites;Journal of Engineered Fibers and Fabrics;2024-01

3. Aging Characteristics of Epoxy Nanocomposites Doped With Silane-Functionalized Alumina Nanoparticles for High-Voltage Insulation Applications;IEEE Transactions on Dielectrics and Electrical Insulation;2023-10

4. Development of a Flexible Rogowski Coil Sensor for Partial Discharge Detection in Power Cables;2023 IEEE International Conference on Artificial Intelligence in Engineering and Technology (IICAIET);2023-09-12

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