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The salt alkali resistance modification of polyurea protective coating of the composite pole can improve the operation reliability of the composite pole in heavily polluted area. In this paper, the surface treatment of montmorillonite was carried out with KH550 coupling agent, and the salt spray protection effect of montmorillonite modified polyurea resin with different contents on pole composite materials was analyzed. The results show that after 28 days of salt spray ageing, the properties stability of montmorillonite modified polyurea resin (sample PFRP-4) with mass fraction of 1.5% is better. The bending and tensile properties were reduced by 12.77% and 25.70%, respectively, and the retention rates of electric strength and flashover electric field strength strength reach 77.60% and 83.83%, respectively. After salt spray ageing, the surface damage degree of PFRP-4 is small, the thermal weight loss is low, and the residual rate is 67.15%. Montmorillonite can effectively fill the free volume and cracks in the polyurea resin, adsorb water molecules and corrosive ions, and reduce the overall water absorption of the coating. The sample PFRP-4 protective coating can effectively improve the hydrophobicity and thermal stability of the composite materials, and has good bonding properties, which can provide a strong guarantee for the operation of the composite pole in the harsh environment such as high salt spray and high humidity.
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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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