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In order to study the surface properties of different materials of insulators, epoxy resin and polytetrafluoroethylene (PTFE) were used as research objects. Firstly, the adhesion characteristics of insulators made of different materials were obtained through surface energy test. Then, the influence of different particle sizes of metal patticles on the surface flashover characteristics of insulators under natural adhesion conditions was studied through test. The results show that the surface energy of PTFE insulators is 30.44 mJ/m2, which is lower than that of epoxy resin insulators, and the viscosity of PTFE is smaller. As the particle size of metal particles attached on the insulator surface decreases, the surface flashover voltage of epoxy resin and PTFE insulators increases gradually, and the surface flashover performance of the two materials of insulators is similar. The insulation failures caused by metal particles can be reduced by replacing the original epoxy resin interface with PTFE.
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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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