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High-temperature-vulcanized (HTV) silicone rubber has poor resistance to ultraviolet (UV) ageing, and its hydrophobicity would gradually lost, tensile strength decrease, and hardness significantly increase after ultraviolet irradiation. In order to improve the hydrophobicity and UV resistance of HTV silicone rubber, the permanent-room-temperature-vulcanized (PRTV) silicone rubber and four needle-like zinc oxide/nano-zinc oxide (tZnO/nZnO) particles with different structures were introduced onto the surface of HTV silicone rubber by embedding-curing method to prepare the hydrophobic and anti-UV composite coatings with different morphologic morphology. The effects of the composition of composite coating on the microstructure and anti-ageing properties of HTV silicone rubber were studied by the ageing experiment and water contact angle, surface hardness, and mechanical properties tests. The results show that the surface holes of HTV silicone rubber are covered, its hydrophobicity increases, and water content and water absorption decrease after the introduction of PRTV silicone rubber on the surface of HTV silicone rubber. The further introduction of ZnO particles greatly improves the hydrophobicity, UV resistance, and thermal stability of HTV silicone rubber materials. The PRTV silicone rubber-tZnO/nZnO composite coating introduced by stepwise embedding-curing method can effectively construct a micro-nano mastoid structure and UV shielding layer on the HTV silicone rubber surface, and its enhancing effect on the hydrophobicity and UV ageing resistance are more obvious than that of single embedding of tZnO or nZnO particles.
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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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