Dong Manling, Yang Zhifei, Xia Guowei, Zhang Jiatao, Zhan Zhenyu, Xin Weifeng, Wang Qilin, Xu Bobin, Zhang Yujin, Xie Jun
State Grid Henan Province Electric Power Corporation Research Institute, Zhengzhou 450099, China.
Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding 071003, China.
Nanomaterials (Basel). 2024 Dec 14;14(24):2009. doi: 10.3390/nano14242009.
Epoxy resin (EP) is an outstanding polymer material known for its low cost, ease of preparation, excellent electrical insulation properties, mechanical strength, and chemical stability. It is widely used in high- and ultra-high-voltage power transmission and transformation equipment. However, as voltage levels continue to increase, EP materials are gradually failing to meet the performance demands of operational environments. Thus, the development of high-performance epoxy resin materials has become crucial. In this study, a combined treatment using plasma and a fluorine-containing coupling agent was employed to fluorinate graphene nanosheets (GNSs), resulting in DFGNSs. Different concentrations of GNSs/DFGNS-modified EP composites were prepared, and their effects on enhancing the surface insulation properties were studied. Tests on surface flashover voltage, surface charge dissipation, trap distribution, and surface resistivity demonstrated that both GNSs and DFGNSs significantly improve the insulation properties of EP materials. Optimal improvement was achieved with a DFGNS content of 0.2 wt%, where the flashover voltage increased by 16.23%.
环氧树脂（EP）是一种杰出的高分子材料，以其低成本、易于制备、优异的电绝缘性能、机械强度和化学稳定性而闻名。它广泛应用于高压和超高压输变电设备。然而，随着电压等级不断提高，EP材料逐渐无法满足运行环境的性能要求。因此，开发高性能环氧树脂材料变得至关重要。在本研究中，采用等离子体和含氟偶联剂的联合处理对石墨烯纳米片（GNSs）进行氟化，得到DFGNSs。制备了不同浓度的GNSs/DFGNSs改性EP复合材料，并研究了它们对提高表面绝缘性能的影响。表面闪络电压、表面电荷消散、陷阱分布和表面电阻率测试表明，GNSs和DFGNSs均能显著提高EP材料的绝缘性能。当DFGNSs含量为0.2 wt%时，实现了最佳改善效果，此时闪络电压提高了16.23%。
