A room-temperature-cured superhydrophobic coating for electric power and its preparation and use methods

A super-hydrophobic coating, room temperature curing technology, applied in anti-fouling/underwater coatings, anti-corrosion coatings, coatings, etc., can solve the problem of reducing the insulation performance of insulating equipment and the anti-corrosion performance of power facilities, and the WCA value cannot meet the efficient removal of inorganic pollution Insulators and insulators flashover and other problems, to achieve the effect of controllable film thickness, good recoatability, and good film-forming performance

Active Publication Date: 2021-10-08
昆明理工大电力工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Organic and inorganic pollutants in the environment adhere to the surface of electrical equipment with dust and water vapor as carriers. In a humid environment, a continuous conductive water film will be formed on the surface of the equipment, which greatly reduces the insulation performance of insulation equipment and the anti-corrosion performance of power facilities. Severe cases may even cause flashover of insulators along the surface and large-scale power outage tripping accidents
Hydrophobic coatings, especially RTV coatings, have been popularized and operated in China for more than 20 years. Their hydrophobicity and hydrophobic mobility can effectively prevent the formation of continuous water films on the surface of power facilities within a certain period of time, preventing the formation of dry and wet areas and causing flashover accidents; but Existing coatings have similar defects, for example, the WCA value of RTV coatings at 90°-135° cannot meet the requirements for efficient removal of inorganic pollutants

Method used

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  • A room-temperature-cured superhydrophobic coating for electric power and its preparation and use methods
  • A room-temperature-cured superhydrophobic coating for electric power and its preparation and use methods
  • A room-temperature-cured superhydrophobic coating for electric power and its preparation and use methods

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Experimental program
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Effect test

Embodiment 1

[0039] In this embodiment, the superhydrophobic nano-SiO through alkyl modification 2 The preparation method is as follows:

[0040] Use hexadimethylsilane to treat ordinary nano-SiO 2 Modified by hexadimethylsilazane (HMDS) on SiO 2 A hydrolysis reaction occurs on the surface, and the siloxane group (-O-Si(CH 3 ) 3 ) to replace the surface hydroxyl group (-OH), the specific preparation process is: first nano-SiO 2 placed in N 2 In the atmosphere, pre-activate at 390°C to 400°C for 60 minutes, then pass in HMDS liquid at 70-75°C, after 50 minutes of reaction, use N 2 Purge the reaction product to obtain superhydrophobic nano-SiO with a WCA of 162°-165° 2 Powder.

[0041] The preparation method of special superhydrophobic coating for electric power in the present embodiment (such as figure 1 ) specifically includes the following steps, wherein the allocation ratio of each group is shown in Table 1 below:

[0042] Table 1: The distribution ratio of each component of the...

Embodiment 2

[0068] In this embodiment, the superhydrophobic nano-SiO through alkyl modification 2 The preparation method is as follows:

[0069] Use hexadimethylsilane to treat ordinary nano-SiO 2 Modified by hexadimethylsilazane (HMDS) on SiO 2 A hydrolysis reaction occurs on the surface, and the siloxane group (-O-Si(CH 3 ) 3 ) to replace the surface hydroxyl group (-OH), the specific preparation process is: first nano-SiO 2 placed in N 2 In the atmosphere, pre-activate at 350°C to 360°C for 55 minutes, then pass in HMDS liquid at 60°C to 70°C, after 45 minutes of reaction, use N 2 Purge the reaction product to obtain superhydrophobic nano-SiO with a WCA of 160°-163° 2 Powder.

[0070] The preparation method of special superhydrophobic coating for electric power in the present embodiment (such as figure 1 ) specifically includes the following steps, wherein the allocation ratio of each group is shown in Table 4 below:

[0071] Table 4: The distribution ratio of each component o...

Embodiment 3

[0084] In this embodiment, the superhydrophobic nano-SiO through alkyl modification 2 The preparation method is as follows:

[0085] Use hexadimethylsilane to treat ordinary nano-SiO 2 Modified by hexadimethylsilazane (HMDS) on SiO 2 A hydrolysis reaction occurs on the surface, and the siloxane group (-O-Si(CH 3 ) 3 ) to replace the surface hydroxyl group (-OH), the specific preparation process is: first nano-SiO 2 placed in N 2 In the atmosphere, pre-activate at 300°C to 310°C for 30 minutes, and then pass in HMDS liquid at 50°C to 55°C. After 30 minutes of reaction, use N 2 Purge the reaction product to obtain superhydrophobic nano-SiO with a WCA of 160°-163° 2 Powder.

[0086] The preparation method of special superhydrophobic coating for electric power in the present embodiment (such as figure 1 ) specifically includes the following steps, wherein the allocation ratio of each group is shown in Table 5 below:

[0087] Table 5: The distribution ratio of each compone...

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Abstract

The invention discloses a special super-hydrophobic coating for electric power cured at room temperature and its preparation and use method. The coating is composed of the following components in terms of mass percentage: 50%-63% of an organic solvent, and 10%-20% of hydrophobic nanoparticles , silane coupling agent 1%-2%, fluorocarbon resin 10%-25%, acrylic resin 7%-20%, odor masking agent 0.5%-1%. The coating can be stirred and mixed step by step by each component and dispersed uniformly by ultrasonic. The method of using the paint is to spray it directly on the surface of the facility after filling. The thickness of the coating is sufficient without sagging, and it can be cured at room temperature for 30min‑2h according to the thickness. The invention provides a superhydrophobic coating specially used for room-temperature curing electric power, which has a simple preparation method, low cost, convenient use, superhydrophobicity and weather resistance, insulation performance, and broad application prospects.

Description

technical field [0001] The invention relates to the technical field of coatings, especially the technical field of anti-fouling flashover coatings for outdoor power facilities, transmission lines, and insulators, and in particular to a room-temperature-cured superhydrophobic coating for electric power and its preparation and use methods. Background technique [0002] In recent years, the power system has been continuously upgraded, the environmental pollution has been intensified, and the pollution flashover accidents caused by the accumulation of pollution on the surface of facilities and equipment, the external insulation of transmission lines and the anti-pollution, anti-flash, anti-corrosion and even anti-icing problems of the outdoor power facilities of substations need to be solved urgently. . The anti-pollution flashover capability of substation equipment and facilities in transmission lines, iron towers, etc. will be greatly reduced after being polluted and corroded ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/12C09D133/00C09D7/62C09D5/08C09D5/16C09D5/25
CPCC08K2201/011C09D5/00C09D5/08C09D5/1662C09D5/1668C09D5/1687C09D127/12C08L33/00C08K9/06C08K3/36
Inventor 黄宜佳黄林陈蓉
Owner 昆明理工大电力工程技术有限公司
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