Super-hydrophobic conformal coating, and preparation method and application method thereof

A super-hydrophobic and coating technology, applied in anti-corrosion coatings, anti-fouling/underwater coatings, coatings, etc., to achieve the effects of improving comprehensive performance, good film-forming performance, and controllable film thickness

Inactive Publication Date: 2017-12-08
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

[0006] In order to overcome the deficiencies of existing antifouling flashover coatings, the present inv

Method used

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  • Super-hydrophobic conformal coating, and preparation method and application method thereof
  • Super-hydrophobic conformal coating, and preparation method and application method thereof
  • Super-hydrophobic conformal coating, and preparation method and application method thereof

Examples

Experimental program
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Example Embodiment

[0052] Example 1

[0053] The superhydrophobic nano SiO modified by alkyl in this example 2 The preparation method is as follows:

[0054] Use hexadimethylsilazane for ordinary nano SiO 2 Modification, through hexadimethylsilazane (HMDS) in SiO 2 Hydrolysis reaction occurs on the surface, and the siloxane group (-O-Si(CH 3 ) 3 ) To replace the surface hydroxyl (-OH), the specific preparation process is: 2 Put N 2 In the atmosphere, pre-activate at a temperature of 390℃~400℃ for 60 minutes, and then pass in the HMDS liquid at 70-75℃. After the reaction is completed for 50 minutes, use N 2 Purge the reaction product to obtain superhydrophobic nano SiO with WCA of 162°~165° 2 Powder.

[0055] The preparation method of the super-hydrophobic three-proof coating in this embodiment (such as figure 1 ) Specifically includes the following steps, where the distribution of each group is shown in Table 1 below:

[0056] Table 1: The distribution ratio of each component of the super-hydrophobic thr...

Example Embodiment

[0080] Example 2

[0081] The superhydrophobic nano SiO modified by alkyl in this example 2 The preparation method is as follows:

[0082] Use hexadimethylsilazane for ordinary nano SiO 2 Modification, through hexadimethylsilazane (HMDS) in SiO 2 Hydrolysis reaction occurs on the surface, and the siloxane group (-O-Si(CH 3 ) 3 ) To replace the surface hydroxyl (-OH), the specific preparation process is: 2 Put N 2 In the atmosphere, pre-activate at a temperature of 350℃~360℃ for 55min, then pass in HMDS liquid at 60℃~70℃, after 45min reaction is completed, use N 2 Purge the reaction product to obtain superhydrophobic nano-SiO with a WCA of 160°~163° 2 Powder.

[0083] The preparation method of the super-hydrophobic three-proof coating in this embodiment (such as figure 1 ) Specifically includes the following steps, where the distribution of each group is shown in Table 4 below:

[0084] Table 4: The distribution ratio of each component of the super-hydrophobic three-proof coating in Exa...

Example Embodiment

[0095] Example 3

[0096] The superhydrophobic nano SiO modified by alkyl in this example 2 The preparation method is as follows:

[0097] Use hexadimethylsilazane for ordinary nano SiO 2 Modification, through hexadimethylsilazane (HMDS) in SiO 2 Hydrolysis reaction occurs on the surface, and the siloxane group (-O-Si(CH 3 ) 3 ) To replace the surface hydroxyl (-OH), the specific preparation process is: 2 Put N 2 In the atmosphere, pre-activate at a temperature of 300℃~310℃ for 30min, then pass in HMDS liquid at 50℃~55℃, after 30min reaction is completed, use N 2 Purge the reaction product to obtain superhydrophobic nano-SiO with a WCA of 160°~163° 2 Powder.

[0098] The preparation method of the super-hydrophobic three-proof coating in this embodiment (such as figure 1 ) Specifically includes the following steps, where the distribution of each group is shown in Table 5 below:

[0099] Table 5: The distribution ratio of each component of the super-hydrophobic three-proof coating in Exa...

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Abstract

The invention discloses a super-hydrophobic conformal coating, and a preparation method and an application method thereof. The super-hydrophobic conformal coating is composed of, by mass, 5 to 40% of fluorocarbon resin, 10 to 30% of fluorosilicon resin, 20 to 60% of an organic solvent, 10 to 30% of silica, 1 to 10% of titanium dioxide, 1 to 10% of polytetrafluoroethylene, 0.1 to 0.5% of a catalyst, and 1 to 5% of a curing agent. According to the preparation method, the ingredients are subjected to stirring mixing and ultrasonic uniform dispersion in sequence at a certain ratio. According to the application method, the super-hydrophobic conformal coating is subjected to direct spraying or brush coating onto the surfaces of insulators and outdoor electric power facilities; the thickness of obtained coating layers is controlled to be 0.1 to 0.5mm preferably; and 20 to 60min of normal temperature curing is needed. The preparation method is simple; the cost is low; the super-hydrophobic conformal coating is convenient to use, possesses extremely high hydrophobicity and weatherability, is capable of realizing self cleaning, is a nanometer composite hybrid normal-temperature cured fluorocarbon coating, is capable of realizing stain prevention, pollution flashover prevention, and corrosion prevention of insulators and outdoor electric power facilities effectively, and is promising in application prospect.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to the technical field of antifouling flashover coatings for power transmission lines, and in particular to a superhydrophobic three-proof coating and a preparation method and application method thereof. Background technique [0002] In recent years, the power system has been continuously upgraded, and environmental pollution has continued to intensify. The external insulation of transmission lines and the anti-pollution, anti-flash, and anti-corrosion problems of outdoor power facilities in substations need to be resolved urgently. Anti-fouling is the prerequisite for anti-flash and anti-corrosion. 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, greatly reducing the insulation equipment I...

Claims

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Application Information

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IPC IPC(8): C09D127/12C09D183/08C09D127/18C09D5/08C09D5/16C09D7/12B05D3/04B05D7/24
CPCC09D127/12B05D3/0406B05D7/24B05D2301/00B05D2401/10B05D2506/10B05D2506/15C08K2003/2241C08K2201/011C08L2205/02C08L2205/03C09D5/08C09D5/1618C09D5/1675C09D5/1687C09D183/08C08L83/08C08L27/18C08K9/06C08K3/36C08K3/22C08L27/12
Inventor 江巧文黄恒黄宜佳
Owner 昆明理工大电力工程技术有限公司
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