With its excellent insulating properties, silicone rubber has become the core material for key components of power equipment. In order to further improve the insulating performance of silicone rubber, the SiO2 was hydroxylated by low-temperature plasma and KH570 grafting, and doped into silicone rubber matrix to prepare SiO2/silicone rubber nanocomposites. The effect laws of different plasma modification conditions (time and frequency) on the surface morphology, surface flashover characteristics, mechanical characteristics, and surface hydrophobicity of SiO2/silicone rubber nanocomposites were systematically studied. The results show that appropriate plasma treatment time and frequency (10 min and 19 kHz) can effectively improve the surface hydrophobicity, electrical characteristics, and mechanical properties of silicone rubber. Plasma modification can effectively reduces the agglomeration of SiO2 nanoparticles in silicone rubber matrix, increase the deep trap density in composites and slow down the surface potential decay rate, thereby increasing the pollution flashover voltage of the composites. In addition, plasma modified SiO2 can significantly improve the tensile strength and hydrophobicity of SiO2/silicon rubber nanocomposites.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |