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To improve the insulating properties of machinable ceramic brush holders in high humidity environment, different types of organosilane film layers were formed on the surface of machinable ceramic, and their microstructure, contact angle, surface bonding strength, and moisture absorption rate were tested. The effects of the film layers containing KH-560, KH-570, and fluorosilane on the adhesion strength and moisture absorption of epoxy adhesive were studied. The mechanism of the films enhance the moisture resistance of machinable ceramic brush holder was concluded. The results show that the film layer thickness of KH-560 organosiliane on the surface of the machinable ceramic brush holder is about 40 μm. At the same time, the water contact angle of the brush holder product treated by KH-560 coupling agent increases from 9.2° to 42.8°, the moisture absorption rate reduces by more than 58.3%, and the hydrophobicity increases significantly. Even in the environment with relative humidity of 90%, the insulation resistance can still reach more than 220 MΩ, showing excellent insulation performance, which makes its insulation reliability improve significantly in high humidity environment.
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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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