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Room temperature vulcanized silicone rubber (PRTV) material is the most commonly used anti-pollution flashover coating in power system at present. In order to further improve the insulating performance of PRTV material, the boron nitride (BN) nanoparticles was modified by silane coupling agent KH570, and a BN/PRTV composite was prepared. The effects of BN doping content on the electrical properties and hydrophobicity of the composite material were studied. The results show that the surface of the BN nanoparticle is successfully grafted with coupling agent. With the increase of BN nanoparticle content, the section interface roughness of the composite increases and the mastoid structure appears. The introduction of BN nanoparticles reduces the dielectric constant of PRTV material, and introduces more deep traps inside PRTV, which inhibitis the charge detrapping ability and increases the flashover voltage of PRTV material. When the mass fraction of BN nanoparticles is 5%, the hydrophobicity of the composite is the best and the and flashover voltage is the highest.
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| 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 |
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