1. The self-cleaning high-strength rod-shaped porcelain insulator is characterized by comprising an insulator body, wherein the insulator body is coated with a coating, and the coating is prepared from the following raw materials in parts by weight: 50-80 parts of modified fluorocarbon resin, 4-8 parts of modified nano hydrated silicon dioxide, 2-6 parts of nano cerium borate, 5-10 parts of silicon carbide micro powder, 6-12 parts of modified polytetrafluoroethylene wax emulsion, 5-10 parts of potassium titanate whisker, 3-5 parts of nano microcrystalline cellulose, 1-5 parts of ethylene-vinyl acetate copolymer emulsion, 2-4 parts of pentaerythritol and 30-40 parts of ethyl acetate.

2. The self-cleaning high-strength rod-shaped porcelain insulator according to claim 1, wherein the coating is prepared from the following raw materials in parts by weight: 60-70 parts of modified fluorocarbon resin, 5-7 parts of modified nano hydrated silicon dioxide, 3-5 parts of nano cerium borate, 6-9 parts of silicon carbide micro powder, 7-11 parts of modified polytetrafluoroethylene wax emulsion, 6-9 parts of potassium titanate whisker, 3.5-4.5 parts of nano microcrystalline cellulose, 2-4 parts of ethylene-vinyl acetate copolymer emulsion, 2.5-3.5 parts of pentaerythritol and 32-38 parts of ethyl acetate.

3. The self-cleaning high-strength rod-shaped porcelain insulator according to claim 1, wherein the modified fluorocarbon resin comprises the following raw materials in parts by weight: 4-8 parts of perfluorooctyl triethoxysilane, 50-60 parts of fluorocarbon resin, 4-10 parts of trifluoropropyl methyl cyclotrisiloxane and 20-30 parts of ethyl acetate.

4. The self-cleaning high-strength rod-shaped porcelain insulator according to claim 3, wherein the modified fluorocarbon resin is prepared by the following steps: adding perfluorooctyl triethoxysilane, trifluoropropylmethyl cyclotrisiloxane, polydimethylsiloxane and ethyl acetate into fluorocarbon resin, stirring at the rotating speed of 800-1000 r/min, heating to 80-100 ℃, preserving heat for 8-10 h, naturally cooling, and standing for 28-30 h to obtain the modified fluorocarbon resin.

5. The self-cleaning high-strength rod-shaped porcelain insulator according to claim 1, wherein the modified polytetrafluoroethylene wax emulsion comprises the following raw materials in parts by weight: 4-8 parts of perfluorooctyl triethoxysilane, 2-5 parts of trifluoropropyl methyl cyclotrisiloxane, 5-10 parts of polymethyl triethoxysilane and 20-30 parts of polytetrafluoroethylene wax emulsion.

6. The self-cleaning high-strength rod-shaped porcelain insulator according to claim 5, wherein the modified polytetrafluoroethylene wax emulsion is prepared by the following steps: adding perfluorooctyl triethoxysilane, trifluoropropyl methyl cyclotrisiloxane and polymethyl triethoxysilane into the polytetrafluoroethylene wax emulsion, dispersing for 4-6 h at the temperature of 68-70 ℃, and naturally cooling.

7. The self-cleaning high-strength rod-shaped porcelain insulator according to claim 1, wherein the preparation method of the nano cerium borate comprises the following steps: configuration of Na₂B₄O₇·10H₂O water solution A and cerium nitrate solution B, keeping the temperature of the solution A in a water bath to 50-60 ℃, adding oleic acid into the solution A, and stirring the mixed solution for more than 40 min; and after stirring, dropwise adding the solution B into the solution A under a stirring state until no precipitate is generated, filtering after dropwise adding, washing the solid phase with ethanol for 2-3 times, and drying to obtain the nano cerium borate.

8. The self-cleaning high-strength rod porcelain insulator according to claim 1, wherein the preparation method of the modified nano hydrated silica comprises the following steps: mixing hydrated silicon dioxide with absolute ethyl alcohol, slowly adding vinyltriethoxysilane, uniformly mixing, adjusting the pH to 7-8, stirring at constant temperature of 35-45 ℃ for 15-25 h, cooling to room temperature, centrifuging, drying at 55-65 ℃ in vacuum, and grinding to obtain modified hydrated silicon dioxide; wherein 1ml of absolute ethanol is mixed with 1g of hydrated silicon dioxide; 0.1ml of vinyltriethoxysilane was added per 1g of hydrated silica.

9. A self-cleaning high strength rod porcelain insulator according to claim 1, wherein the preparation method of the coating material comprises:

s1, adding modified nano hydrated silicon dioxide, nano cerium borate and silicon carbide micro powder into the modified fluorocarbon resin, and uniformly mixing and dispersing to obtain a first mixture;

s2, adding the potassium titanate whiskers and the nano microcrystalline cellulose into the modified polytetrafluoroethylene wax emulsion, and uniformly mixing and dispersing to obtain a mixture II;

and S3, mixing and dispersing the mixture I and the mixture II, adding the ethylene-vinyl acetate copolymer emulsion, pentaerythritol and ethyl acetate, and uniformly mixing to obtain the coating.

Background

The insulator is a special insulating control and can play an important role in an overhead transmission line. Early-year insulators are mostly used for telegraph poles, and a plurality of disc-shaped insulators are hung at one end of a high-voltage wire connecting tower which is slowly developed, and play two basic roles in an overhead transmission line, namely supporting a wire and preventing current from flowing back to the ground, and meanwhile, the purpose of increasing creepage distance is also achieved. The insulator is classified into various types, and can be classified into a post insulator, a suspension insulator, a pin insulator, a butterfly insulator and a tension insulator according to the structure. According to the difference of the used insulating materials, the insulator can be divided into a porcelain insulator, a glass insulator and a composite insulator.

The insulator is located in an external natural environment all the year round, so that various natural condition changes and various climate changes can greatly affect the insulator, for example, the insulator is easily affected by damp in rainy and snowy weather, ice and snow can be covered in frost weather, certain influence can be caused by lightning striking, and flashover of the insulator can be easily caused. In addition, pollution flashover, namely flashover caused by pollution, is the most easily to cause great damage to insulators for contact networks of electrified railways. The number of pollution flashover is not large in several kinds of external insulation, but the loss caused by the pollution flashover is the largest, the requirement on the surface of the insulator which is 10 times of the damage caused by the lightning flashover is very high, and because the natural conditions of the atmospheric environment and the like are basically consistent in a wider region, once the pollution flashover occurs under the working voltage, a large piece of insulator is likely to have problems at the same time, the influence is very serious, and therefore, the realization of the self-cleaning property of the insulator is very important.

With the rapid development of industry and the rapid increase of transmission capacity, the voltage grade of power transmission and transformation equipment is continuously improved, the pollution flashover accident of an insulator of a power system is increasingly prominent, the pollution flashover accident occurrence area is large, the reclosing success rate is reduced, long-time power failure is often caused, heavy and disastrous loss is caused to users, and great damage is brought to national economy. How to avoid pollution flashover accidents of insulators is one of the problems to be solved urgently in the current power system.

Disclosure of Invention

The invention aims to solve at least one technical problem in the prior art and provides a self-cleaning high-strength rod-shaped porcelain insulator.

The technical solution of the invention is as follows:

the utility model provides a self-cleaning type high strength clavate porcelain insulator, includes the insulator body, it has the coating to coat on the insulator body, the coating comprises the raw materials of following parts by weight: 50-80 parts of modified fluorocarbon resin, 4-8 parts of modified nano hydrated silicon dioxide, 2-6 parts of nano cerium borate, 5-10 parts of silicon carbide micro powder, 6-12 parts of modified polytetrafluoroethylene wax emulsion, 5-10 parts of potassium titanate whisker, 3-5 parts of nano microcrystalline cellulose, 1-5 parts of ethylene-vinyl acetate copolymer emulsion, 2-4 parts of pentaerythritol and 30-40 parts of ethyl acetate.

In a specific embodiment of the invention, the coating is prepared from the following raw materials in parts by weight: 60-70 parts of modified fluorocarbon resin, 5-7 parts of modified nano hydrated silicon dioxide, 3-5 parts of nano cerium borate, 6-9 parts of silicon carbide micro powder, 7-11 parts of modified polytetrafluoroethylene wax emulsion, 6-9 parts of potassium titanate whisker, 3.5-4.5 parts of nano microcrystalline cellulose, 2-4 parts of ethylene-vinyl acetate copolymer emulsion, 2.5-3.5 parts of pentaerythritol and 32-38 parts of ethyl acetate.

In a specific embodiment of the present invention, the modified fluorocarbon resin comprises the following raw materials in parts by weight: 4-8 parts of perfluorooctyl triethoxysilane, 50-60 parts of fluorocarbon resin, 4-10 parts of trifluoropropyl methyl cyclotrisiloxane and 20-30 parts of ethyl acetate.

In a specific embodiment of the present invention, the preparation method of the modified fluorocarbon resin comprises: adding perfluorooctyl triethoxysilane, trifluoropropylmethyl cyclotrisiloxane, polydimethylsiloxane and ethyl acetate into fluorocarbon resin, stirring at the rotating speed of 800-1000 r/min, heating to 80-100 ℃, preserving heat for 8-10 h, naturally cooling, and standing for 28-30 h to obtain the modified fluorocarbon resin.

In a specific embodiment of the invention, the modified polytetrafluoroethylene wax emulsion comprises the following raw materials in parts by weight: 4-8 parts of perfluorooctyl triethoxysilane, 2-5 parts of trifluoropropyl methyl cyclotrisiloxane, 5-10 parts of polymethyl triethoxysilane and 20-30 parts of polytetrafluoroethylene wax emulsion.

According to a specific embodiment of the invention, perfluorooctyl triethoxysilane, trifluoropropyl methyl cyclotrisiloxane and polymethyltriethoxysilane are added into a polytetrafluoroethylene wax emulsion, dispersed for 4-6 hours at a temperature of 68-70 ℃, and then naturally cooled.

In a specific embodiment of the present invention, the preparation method of the nano cerium borate comprises: configuration of Na₂B₄O₇·10H₂O water solution A and cerium nitrate solution B, keeping the temperature of the solution A in a water bath to 50-60 ℃, adding oleic acid into the solution A, and stirring the mixed solution for more than 40 min; and after stirring, dropwise adding the solution B into the solution A under a stirring state until no precipitate is generated, filtering after dropwise adding, washing the solid phase with ethanol for 2-3 times, and drying to obtain the nano cerium borate.

In a specific embodiment of the present invention, the preparation method of the modified nano hydrated silica comprises: mixing hydrated silicon dioxide with absolute ethyl alcohol, slowly adding vinyltriethoxysilane, uniformly mixing, adjusting the pH to 7-8, stirring at constant temperature of 35-45 ℃ for 15-25 h, cooling to room temperature, centrifuging, drying at 55-65 ℃ in vacuum, and grinding to obtain modified hydrated silicon dioxide; wherein 1ml of absolute ethanol is mixed with 1g of hydrated silicon dioxide; 0.1ml of vinyltriethoxysilane was added per 1g of hydrated silica.

In a specific embodiment of the present invention, the preparation method of the coating comprises:

s1, adding modified nano hydrated silicon dioxide, nano cerium borate and silicon carbide micro powder into the modified fluorocarbon resin, and uniformly mixing and dispersing to obtain a first mixture;

s2, adding the potassium titanate whiskers and the nano microcrystalline cellulose into the modified polytetrafluoroethylene wax emulsion, and uniformly mixing and dispersing to obtain a mixture II;

and S3, mixing and dispersing the mixture I and the mixture II, adding the ethylene-vinyl acetate copolymer emulsion, pentaerythritol and ethyl acetate, and uniformly mixing to obtain the coating.

The invention has at least one of the following beneficial effects:

according to the invention, the modified fluorocarbon resin, the modified nano hydrated silicon dioxide, the nano cerium borate, the silicon carbide micro powder, the modified polytetrafluoroethylene wax emulsion, the potassium titanate whisker, the nano microcrystalline cellulose, the ethylene-vinyl acetate copolymer emulsion and the like are compounded, so that the modified fluorocarbon resin has low surface energy and can reduce the surface energy of the coating; the modified nano hydrated silicon dioxide has hydrophobicity and can improve the hydrophobic effect of the coating, the problem of compatibility between the coating and the insulator body is solved by stably dispersing the modified nano hydrated silicon dioxide, the nano cerium borate, the silicon carbide micro powder, the potassium titanate whisker, the nano microcrystalline cellulose and the like on the coating matrix without aggregation, so that the coating is not easy to fall off from the insulator body, the structural strength of the coating can be improved by adding the nano cerium borate, the silicon carbide micro powder potassium titanate whisker and the nano microcrystalline cellulose, and the aging resistance, the lightning impact resistance and the wear resistance of the coating are improved; the modified polytetrafluoroethylene wax emulsion also has low surface energy, and is organically combined with the low surface energy organic silicon resin and the ethylene-vinyl acetate copolymer emulsion, so that the hydrophobicity of the coating is improved. Therefore, the modified fluorocarbon resin, the modified nano hydrated silicon dioxide, the nano cerium borate, the silicon carbide micro powder, the modified polytetrafluoroethylene wax emulsion, the potassium titanate whisker, the nano microcrystalline cellulose, the ethylene-vinyl acetate copolymer emulsion and other raw materials are compounded to form the coating, and the coating is coated on the surface of the insulator, so that the insulator has a self-cleaning effect, and the coating formed by the coating has a wear-resistant effect, so that the wear-resistant effect of the insulator is improved.

Detailed Description

The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples.

Example 1

The utility model provides a self-cleaning type high strength clavate porcelain insulator, includes the insulator body, it has the coating to coat on the insulator body, the coating comprises the raw materials of following parts by weight: 50 parts of modified fluorocarbon resin, 4 parts of modified nano hydrated silicon dioxide, 2 parts of nano cerium borate, 5 parts of silicon carbide micropowder, 6 parts of modified polytetrafluoroethylene wax emulsion, 5 parts of potassium titanate whisker, 3 parts of nano microcrystalline cellulose, 1 part of ethylene-vinyl acetate copolymer emulsion, 2 parts of pentaerythritol and 30 parts of ethyl acetate.

The modified fluorocarbon resin comprises the following raw materials in parts by weight: 4 parts of perfluorooctyl triethoxysilane, 50 parts of fluorocarbon resin, 4 parts of trifluoropropyl methyl cyclotrisiloxane and 20 parts of ethyl acetate. The preparation method comprises the following steps: adding perfluorooctyl triethoxysilane, trifluoropropylmethyl cyclotrisiloxane, polydimethylsiloxane and ethyl acetate into fluorocarbon resin, stirring at the rotating speed of 800r/min, heating to 80 ℃, preserving heat for 8 hours, naturally cooling, and standing for 28 hours to obtain the modified fluorocarbon resin.

The modified polytetrafluoroethylene wax emulsion comprises the following raw materials in parts by weight: 4 parts of perfluorooctyl triethoxysilane, 2 parts of trifluoropropyl methyl cyclotrisiloxane, 5 parts of polymethyl triethoxysilane and 20 parts of polytetrafluoroethylene wax emulsion. The preparation method comprises the following steps: adding perfluorooctyl triethoxysilane, trifluoropropylmethyl cyclotrisiloxane and polymethyltriethoxysilane into the polytetrafluoroethylene wax emulsion, dispersing for 6h at the temperature of 68 ℃, and naturally cooling.

The preparation method of the nano cerium borate comprises the following steps: configuration of Na₂B₄O₇·10H₂O aqueous solution A and cerium nitrate solution B, Na in the solution A₂B₄O₇·10H₂The concentration of O is 0.02g/mL, and the rest is water; the concentration of the cerium nitrate in the solution B is 0.5g/mL, and the balance is water; keeping the temperature of the solution A in a water bath to 45 ℃, adding oleic acid into the solution A, wherein the ratio of the added amount of the oleic acid to the amount of the solution A is 5 g: stirring the mixed solution for more than 40min by 100 mL; and after stirring, dropwise adding the solution B into the solution A under the stirring state until no precipitate is generated, filtering after dropwise adding, washing the solid phase with ethanol for 2 times, and drying to obtain the nano cerium borate.

The preparation method of the modified nano hydrated silicon dioxide comprises the following steps: mixing hydrated silicon dioxide with absolute ethyl alcohol, slowly adding vinyltriethoxysilane, uniformly mixing, adjusting pH to 7, stirring at constant temperature of 35 ℃ for 25h, cooling to room temperature, centrifuging, vacuum drying at 55 ℃, and grinding to obtain modified hydrated silicon dioxide; wherein 1ml of absolute ethanol is mixed with 1g of hydrated silicon dioxide; 0.1ml of vinyltriethoxysilane was added per 1g of hydrated silica.

The preparation method of the coating comprises the following steps:

s1, adding modified nano hydrated silicon dioxide, nano cerium borate and silicon carbide micro powder into the modified fluorocarbon resin, and uniformly mixing and dispersing to obtain a first mixture;

s2, adding the potassium titanate whiskers and the nano microcrystalline cellulose into the modified polytetrafluoroethylene wax emulsion, and uniformly mixing and dispersing to obtain a mixture II;

and S3, mixing and dispersing the mixture I and the mixture II, adding the ethylene-vinyl acetate copolymer emulsion, pentaerythritol and ethyl acetate, and uniformly mixing to obtain the coating.

And coating the coating on the insulator body, and drying to obtain the self-cleaning high-strength rod-shaped porcelain insulator.

Example 2

The utility model provides a self-cleaning type high strength clavate porcelain insulator, includes the insulator body, it has the coating to coat on the insulator body, the coating comprises the raw materials of following parts by weight: 60 parts of modified fluorocarbon resin, 5 parts of modified nano hydrated silicon dioxide, 3 parts of nano cerium borate, 6 parts of silicon carbide micro powder, 7 parts of modified polytetrafluoroethylene wax emulsion, 6 parts of potassium titanate whisker, 3.5 parts of nano microcrystalline cellulose, 2 parts of ethylene-vinyl acetate copolymer emulsion, 2.5 parts of pentaerythritol and 32 parts of ethyl acetate.

The modified fluorocarbon resin comprises the following raw materials in parts by weight: 6 parts of perfluorooctyl triethoxysilane, 3.5 parts of trifluoropropyl methyl cyclotrisiloxane, 7.5 parts of polymethyl triethoxysilane and 25 parts of polytetrafluoroethylene wax emulsion. The preparation method comprises the following steps: adding perfluorooctyl triethoxysilane, trifluoropropylmethyl cyclotrisiloxane, polydimethylsiloxane and ethyl acetate into fluorocarbon resin, stirring at the rotating speed of 9000r/min, heating to 900 ℃, preserving heat for 9h, naturally cooling, and standing for 29h to obtain the modified fluorocarbon resin.

The modified polytetrafluoroethylene wax emulsion comprises the following raw materials in parts by weight: 4-8 parts of perfluorooctyl triethoxysilane, 3 parts of trifluoropropyl methyl cyclotrisiloxane, 6 parts of polymethyl triethoxysilane and 22 parts of polytetrafluoroethylene wax emulsion. The preparation method comprises the following steps: adding perfluorooctyl triethoxysilane, trifluoropropylmethyl cyclotrisiloxane and polymethyltriethoxysilane into the polytetrafluoroethylene wax emulsion, dispersing for 5h at the temperature of 39 ℃, and naturally cooling.

The preparation method of the nano cerium borate comprises the following steps: configuration of Na₂B₄O₇·10H₂O aqueous solution A and cerium nitrate solution B, Na in the solution A₂B₄O₇·10H₂The concentration of O is 0.02g/mL, and the rest is water; the concentration of the cerium nitrate in the solution B is 0.5g/mL, and the balance is water; keeping the temperature of the solution A in a water bath to 45 ℃, adding oleic acid into the solution A, wherein the ratio of the added amount of the oleic acid to the amount of the solution A is 5 g: stirring the mixed solution for more than 40min by 100 mL; and after stirring, dropwise adding the solution B into the solution A under the stirring state until no precipitate is generated, filtering after dropwise adding, washing the solid phase with ethanol for 2 times, and drying to obtain the nano cerium borate.

The preparation method of the modified nano hydrated silicon dioxide comprises the following steps: mixing hydrated silicon dioxide with absolute ethyl alcohol, slowly adding vinyl triethoxysilane, uniformly mixing, adjusting pH to 7.5, stirring at constant temperature of 40 ℃ for 20h, cooling to room temperature, centrifuging, vacuum drying at 60 ℃, and grinding to obtain modified hydrated silicon dioxide; 0.1ml of vinyltriethoxysilane was added per 1g of hydrated silica.

The preparation method of the coating is the same as that of example 1.

And coating the coating on the insulator body, and drying to obtain the self-cleaning high-strength rod-shaped porcelain insulator.

Example 3

The utility model provides a self-cleaning type high strength clavate porcelain insulator, includes the insulator body, it has the coating to coat on the insulator body, the coating comprises the raw materials of following parts by weight: 65 parts of modified fluorocarbon resin, 6 parts of modified nano hydrated silicon dioxide, 4 parts of nano cerium borate, 7.5 parts of silicon carbide micropowder, 9 parts of modified polytetrafluoroethylene wax emulsion, 7.5 parts of potassium titanate whisker, 4 parts of nano microcrystalline cellulose, 3 parts of ethylene-vinyl acetate copolymer emulsion, 3 parts of pentaerythritol and 35 parts of ethyl acetate.

The modified fluorocarbon resin comprises the following raw materials in parts by weight: 8 parts of perfluorooctyl triethoxysilane, 60 parts of fluorocarbon resin, 10 parts of trifluoropropyl methyl cyclotrisiloxane and 30 parts of ethyl acetate. The preparation method comprises the following steps: adding perfluorooctyl triethoxysilane, trifluoropropylmethyl cyclotrisiloxane, polydimethylsiloxane and ethyl acetate into fluorocarbon resin, stirring at the rotating speed of 1000r/min, heating to 100 ℃, preserving heat for 10h, naturally cooling, and standing for 30h to obtain the modified fluorocarbon resin.

The modified polytetrafluoroethylene wax emulsion comprises the following raw materials in parts by weight: 8 parts of perfluorooctyl triethoxysilane, 5 parts of trifluoropropyl methyl cyclotrisiloxane, 10 parts of polymethyl triethoxysilane and 30 parts of polytetrafluoroethylene wax emulsion. The preparation method comprises the following steps: adding perfluorooctyl triethoxysilane, trifluoropropylmethyl cyclotrisiloxane and polymethyltriethoxysilane into the polytetrafluoroethylene wax emulsion, dispersing for 4h at the temperature of 70 ℃, and naturally cooling.

The preparation method of the nano cerium borate comprises the following steps: configuration of Na₂B₄O₇·10H₂O aqueous solution A and cerium nitrate solution B, Na in the solution A₂B₄O₇·10H₂The concentration of O is 0.02g/mL, and the rest is water; the concentration of the cerium nitrate in the solution B is 0.5g/mL, and the balance is water; keeping the temperature of the solution A in a water bath to 45 ℃, adding oleic acid into the solution A, wherein the ratio of the added amount of the oleic acid to the amount of the solution A is 5 g: stirring the mixed solution for more than 40min by 100 mL; and after stirring, dropwise adding the solution B into the solution A under the stirring state until no precipitate is generated, filtering after dropwise adding, washing the solid phase with ethanol for 2 times, and drying to obtain the nano cerium borate.

The preparation method of the modified nano hydrated silicon dioxide comprises the following steps: mixing hydrated silicon dioxide with absolute ethyl alcohol, slowly adding vinyl triethoxysilane, uniformly mixing, adjusting pH to 8, stirring at constant temperature of 45 ℃ for 15h, cooling to room temperature, centrifuging, vacuum drying at 65 ℃, and grinding to obtain modified hydrated silicon dioxide; 0.1ml of vinyltriethoxysilane was added per 1g of hydrated silica.

The preparation method of the coating is the same as that of example 1.

And coating the coating on the insulator body, and drying to obtain the self-cleaning high-strength rod-shaped porcelain insulator.

Example 4

The utility model provides a self-cleaning type high strength clavate porcelain insulator, includes the insulator body, it has the coating to coat on the insulator body, the coating comprises the raw materials of following parts by weight: 70 parts of modified fluorocarbon resin, 7 parts of modified nano hydrated silicon dioxide, 5 parts of nano cerium borate, 9 parts of silicon carbide micro powder, 11 parts of modified polytetrafluoroethylene wax emulsion, 9 parts of potassium titanate whisker, 4.5 parts of nano microcrystalline cellulose, 4 parts of ethylene-vinyl acetate copolymer emulsion, 3.5 parts of pentaerythritol and 38 parts of ethyl acetate.

The rest is the same as example 1.

Example 5

The utility model provides a self-cleaning type high strength clavate porcelain insulator, includes the insulator body, it has the coating to coat on the insulator body, the coating comprises the raw materials of following parts by weight: 80 parts of modified fluorocarbon resin, 8 parts of modified nano hydrated silicon dioxide, 6 parts of nano cerium borate, 10 parts of silicon carbide micropowder, 12 parts of modified polytetrafluoroethylene wax emulsion, 10 parts of potassium titanate whisker, 5 parts of nano microcrystalline cellulose, 5 parts of ethylene-vinyl acetate copolymer emulsion, 4 parts of pentaerythritol and 40 parts of ethyl acetate.

The rest is the same as example 1.

Comparative example 1

The difference from example 1 is that: unmodified fluorocarbon resin, nano hydrated silicon dioxide and polytetrafluoroethylene wax emulsion are adopted.

The rest is the same as example 1.

Comparative example 2

The difference from example 1 is that: modified polytetrafluoroethylene wax emulsion, modified nano hydrated silicon dioxide, nano cerium borate and potassium titanate whisker are not added.

The rest is the same as example 1.

The insulators prepared in examples 1 to 5 and comparative examples 1 to 2 were tested, and the test methods and results are shown in table 1 below:

TABLE 1

As can be seen from table 1, the contact angle of the coating formed by the composite coating prepared in examples 1 to 5 is greater than 150 °, the adhesion is level 1, and the contact angle in the wear resistance test is greater than 150 °, and the composite coating has the effects of chemical reagent resistance and oil resistance, so that the insulator prepared in examples 1 to 5 has an anti-fouling effect and thus has a self-cleaning effect. Comparing examples 1-5 with comparative examples 1-2, it can be seen that the contact angles of examples 1-5 in various tests are all larger than those of comparative example 1 (fluorocarbon resin, nano hydrated silicon dioxide, polytetrafluoroethylene wax emulsion is not modified), comparative example 2 (modified polytetrafluoroethylene wax emulsion, modified nano hydrated silicon dioxide, nano cerium borate, potassium titanate whisker are not added), so as to indicate whether the fluorocarbon resin, nano hydrated silicon dioxide, polytetrafluoroethylene wax emulsion is modified and whether the modified polytetrafluoroethylene wax emulsion, modified nano hydrated silicon dioxide, nano cerium borate, potassium titanate whisker are added can affect the self-cleaning effect and the wear-resistant effect of the insulator.

The above are merely characteristic embodiments of the present invention, and do not limit the scope of the present invention in any way. All technical solutions formed by equivalent exchanges or equivalent substitutions fall within the protection scope of the present invention.