Processing technology of a slow-release long-lasting super-hydrophobic antifouling flashover coating

Abstract

The invention discloses a processing technology of a slow-release long-acting super hydrophobic anti-pollution flashover coating. The processing technology comprises the following steps: first, preparing hydroxypropyl-terminated fluorinated polysiloxane, hydroxyl-terminated polysiloxane and hydrophobic fumed silica; second, adding the hydroxypropyl-terminated fluorinated polysiloxane and hydroxyl-terminated polysiloxane together with 107 silicone rubber, nano zinc oxide, oil amino oleate, mica powder and aluminum hydroxide into a mixer, stirring uniformly, and grinding for 3-4 times on a three-roller machine to obtain a uniform sizing material; third, adding the uniform sizing material into a kneading machine, adding the hydrophobic fumed silica, heating to 145-150 DEG C, kneading for 1-2 hours and cooling to 20-30 DEG C; and after that, adding a ketoxime crosslinking agent, dimethylamino propylamine, a silane coupling agent and an organic solvent, and stirring uniformly to obtain slow-release long-acting super hydrophobic anti-pollution flashover coating. In the coating prepared by the preparation method disclosed by the invention, the aims of slow release and pollution prevention can be achieved through the combination of the hydroxypropyl-terminated fluorinated polysiloxane and hydroxyl-terminated polysiloxane, and the hydrophobicity transfer of the coating can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a processing technology of slow-release long-acting super-hydrophobic antifouling flashover coatings. Background technique [0002] Pollution flashover accidents involve a wide range of areas, and the power outage lasts for a long time, which seriously threatens the operation safety of power transmission and transformation equipment. Especially in winter, there are thousands of pollution flashover trips in the national power grid, sometimes almost causing the provincial power grid to be disconnected. The anti-fouling flashover measures are nothing more than four main measures: taking measures to adjust creepage, cleaning insulators, using synthetic insulators, and coating RTV paint (room temperature vulcanized silicone rubber). Comprehensive investigation and comparison of the above anti-fouling flashover measures, it can be seen that coating RTV paint is the most economical and...

AI Technical Summary

Problems solved by technology

[0003] However, although the introduction of RTV coatings has alleviated the increasingly serious pollution flashover problem in power systems, the performance of current RTV coatings is still low. First, the coatings have weak adhesion, poor wear resistance, and poor corrosion resistance. Due to poor adhesion, In the process of maintenance, the coating is easy to detach due to the action of external force; secondly, due to the problem of its own structure and composition, its own mechanical properties, such as elongation, breaking strength and tear strength are all low, and it is easy to be damaged during actual use. Peeling, cracking, and falling off occur; thirdly, the surface of the current RTV paint is easy to absorb and accumulate dust. When the loose dirt reaches a certain thickness, the inside of the dirt is easy to form water flow channels and large-area stagnation areas, and finally forms flashover channel, leading to the occurrence of pollution flashover events; in addition, because RTV coatings not only have to withstand the effects of electric field and wind force, but also bear the erosion of temperature changes, rain, snow, frost and sunlight, the performance of RTV coatings gradually decreases with time. Small, easy to age and short service life, requires regular maintenance or even re-spraying, which brings great limitations to its use

[0004] The preparation process of the current RTV coating is complicated, and the resulting coating has the above-mentioned problems. Therefore, a new type of anti-fouling flashover coating with high performance, slow release and long life has been developed in a targeted manner. The anti-pollution work of power grid lines has important practical significance, which can save a lot of construction funds and operation and maintenance costs, and create better social and economic benefits