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Room-temperature-curing super-hydrophobic coating specially used for electricity, and preparation and use methods of same

A super-hydrophobic coating, room temperature curing technology, used 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 requirements of efficient removal of inorganic pollution. Insulators, insulator flashover, etc., to achieve the effect of controllable film thickness, good recoatability, and good film performance

Active Publication Date: 2019-04-02
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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  • Room-temperature-curing super-hydrophobic coating specially used for electricity, and preparation and use methods of same
  • Room-temperature-curing super-hydrophobic coating specially used for electricity, and preparation and use methods of same
  • Room-temperature-curing super-hydrophobic coating specially used for electricity, and preparation and use methods of same

Examples

Experimental program
Comparison scheme
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 room-temperature-curing super-hydrophobic coating specially used for electricity, and preparation and use methods of same. The coating includes, by mass, 50%-63% of an organic solvent, 10%-20% of hydrophobic nanoparticles, 1%-2% of a silane coupling agent, 10%-25% of fluorocarbon resin, 7%-20% of acrylic resin, and 0.5-1% of an odor-covering agent. The components are stepwise stirred and mixed and then are ultrasonically dispersed uniformly to make the coating. The use method of the coating includes fill-packaging the coating and directly spray-coating surface of facilities therewith, wherein the thickness of the coating layer only need to avoid sagging phenomenon, and curing the coating for 30 min to 2 h according to the thickness at room temperature. The super-hydrophobic coating is simple in preparation method and low in cost, is convenient to use, has super-hydrophobicity and weather resistance, has insulation performance, and has wide application prospect.

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 they are polluted and corrod...

Claims

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Application Information

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Patent Type & Authority Applications(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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