Optical superstructure coating for high-voltage transmission line cooling and preparation method and application thereof

Abstract

The application provides an optical superstructure coating for temperature reduction of high-voltage transmission lines and a preparation method and application thereof. The optical superstructure coating of the application comprises at least one micro-nano medium with a high scattering characteristic value and at least one functional polymer material medium with a high emission characteristic value. The optical superstructure coating with high electromagnetic wave resonance characteristics is coated on the outer surface of the high-voltage transmission line to realize sustainable and efficient passive cooling of the high-voltage transmission line in a high-temperature environment. After optimization of the multi-physical field model, the micro-nano particles with high forward scattering characteristics are randomly and uniformly distributed in the optical superstructure coating, so as to accurately control the wide-spectrum response peak value of the sunlight wave band and the mid-infrared thermal radiation wave band. The optical superstructure design of "multi-stage scattering-high efficiency reflection" solves the safety hidden trouble problem of high-voltage transmission lines and other power equipment caused by high temperature in a high-solar radiation environment, and significantly reduces the cost of the existing cooling means.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage transmission lines, in particular to an optical superstructure coating for cooling high-voltage transmission lines and a preparation method and application thereof. BACKGROUND

[0002] Under high solar radiation environment, high-voltage transmission lines face multiple key challenges in physical sense. First, the transmission line increases the resistance of the conductor due to the absorption of a large amount of solar radiation and the joule heat effect caused by its own current, thereby increasing the transmission loss, raising the conductor temperature, and reducing the transmission efficiency. Second, the significant rise in conductor temperature will cause thermal expansion of the conductor, resulting in a decrease in sag, thereby reducing the safety distance from the ground and cross objects and increasing the risk of discharge, which may cause line tripping accidents. In addition, the local overheating of the transmission line may cause the conductor to melt, resulting in the interruption of the transmission line and seriously affecting the reliability of power supply. Under high solar radiation environment, high-voltage transmission lines face severe thermal management challenges. In summary, the high-voltage transmission conductor itself continuously generates heat, has few heat dissipation channels, and has poor radiation heat dissipation capacity, making it difficult to cool down. In view of this, it is urgent to develop micro-nano optical metamaterial devices for high solar radiation environment to provide high-voltage transmission lines with efficient reflection and thermal radiation management capabilities, achieve efficient passive cooling of the transmission line, and thus ensure the stability of the power system and reduce economic losses.

[0003] The prior art discloses a cooling wire for electric machines, which comprises a conductor, an asbestos layer and an insulation layer from inside to outside. The asbestos layer is provided with a water storage cavity and a through hole, and the upper part of the insulation layer is provided with a plurality of cooling mechanisms. The invention has the advantages of simple structure, continuous cooling of the conductor in the wire, and avoidance of wire burning. However, this method is difficult to be applied to high-voltage transmission conductors on a large scale, has high cost, and cannot meet the cooling requirements of high-voltage transmission conductors.

[0004] The prior art discloses an electric wire with self-cooling function, which comprises a protective sleeve, a filling wire core arranged in the middle of the protective sleeve, a plurality of electric wire cables connected to the outer surface of the filling wire core, and a plurality of heat-conducting blocks arranged on the outer surface of the electric wire cables. This method dissipates heat to avoid heat accumulation in the interior of the electric wire, thereby greatly increasing the service life of the electric wire. However, the strong heating effect of external solar radiation is not considered.

[0005] At present, the cooling effect of the cooling electric wire is limited, and it is difficult to be applied on a large scale. In addition, the durability, ultraviolet resistance, acid and alkali resistance of the power transmission line are not considered to be improved. Therefore, there is a lack of a multifunctional passive cooling power transmission line technology, which can make the power transmission line have excellent cooling performance while having the functions of waterproofing, acid-proofing, alkali-proofing, corrosion-proofing and the like, so as to prepare a cooling method suitable for high-voltage power transmission lines and other power equipment, which can effectively improve the theoretical capacity and passive cooling characteristics of the power transmission line in different scenes. At the same time, it also needs to have the advantages of large-scale batch production, low cost, high production efficiency and the like. SUMMARY

[0006] In order to solve the above problems, the present application provides an optical superstructure coating for cooling high-voltage power transmission lines and a preparation method and application thereof. By establishing an optical superstructure theory system of "multi-level scattering-high efficiency reflection", a multi-physical field model of high scattering characteristic value micro-nano medium and high emissivity functional polymer material medium is constructed, and the optical superstructure coating is prepared in large quantities, so as to realize the effective regulation of wide spectrum of solar wave band and mid-infrared thermal radiation wave band, that is, to realize the high reflection effect of solar radiation wave band (0.3-2.5 μm), to block the input of solar energy, especially the high reflection effect of ultraviolet wave band (0.3-0.4 μm), to effectively prevent the damage of ultraviolet to the power transmission line. In addition, the optical superstructure coating in the present application also has the effect of improving the average theoretical capacity and durability of the power transmission line. In summary, through the optimization design of structure parameters in multiple scales and multiple levels, the present application can realize the efficient synergistic regulation of light-heat physical quantities under the condition of direct sunlight, and provide the best effect of cooling, capacity increasing, ultraviolet resistance, acid and alkali resistance and the like for the power transmission line.

[0007] The specific technical solutions of the present application are as follows:

[0008] In the first aspect, the present application provides an optical superstructure coating for cooling high-voltage power transmission lines, which comprises at least one micro-nano medium with high scattering characteristic value and at least one functional polymer material medium with high emission characteristic value.

[0009] Preferably, the scattering efficiency S of the micro-nano medium with high scattering characteristic value is 0.5-0.9. ca The scattering efficiency S of the micro-nano medium with high scattering characteristic value is obtained from the ratio of the scattering cross section to the geometric cross section, and the scattering efficiency S of the micro-nano medium with high scattering characteristic value is 0.5-0.9. ca =B / A.

[0010] Wherein, the geometric cross section refers to the two-dimensional cross-sectional area A passing through the center of the micro-nano medium with high scattering characteristic value, and the two-dimensional cross-sectional area A is obtained by multiplying the square of the center radius r of the micro-nano medium by π, A=r 2 π.

[0011] The scattering cross section B is the energy power P of the micro-nano medium scattering electromagnetic wave per unit time sa The energy I of the incident electromagnetic wave at infinity inc The ratio determines the scattering interface B=P sa / I inc .

[0012] Preferably, the scattering efficiency S of the micro-nano medium with high scattering characteristic value in the solar radiation wavelength range of 0.2-2.5 μm ca 0.1-20;

[0013] And / or, the particle size of the micro-nano medium with high scattering characteristic value obeys Gaussian distribution, and the mean value is 5 nm-5 μm.

[0014] Preferably, the volume fraction of the micro-nano medium with high scattering characteristic value in the optical superstructure coating is 5%-85%;

[0015] And / or, the spectral absorption peak characteristic value of the high polymer material with high emission characteristic value is 4 μm-50 μm.

[0016] Preferably, the material used by the micro-nano medium with high scattering characteristic value includes at least one of titanium dioxide, silicon dioxide, zinc oxide, silicon carbide, silicon nitride, zinc sulfide, aluminum oxide, iron oxide, boron nitride, magnesium oxide, barium sulfate, barium carbonate and aluminum silicate;

[0017] And / or, the functional polymer material medium includes at least one of phenolic resin, polyamide resin, polyvinylidene fluoride, fluorine olefin-vinyl ether copolymer, amino resin, alkyd resin, water-based fluorocarbon emulsion resin, furan resin, polyester resin, vinyl resin, acrylic resin and epoxy resin;

[0018] And / or, the thickness of the optical superstructure coating is 15-1000 μm.

[0019] In a second aspect, the application further provides a preparation method of the optical superstructure coating for cooling high-voltage transmission lines, comprising the following steps:

[0020] Mixing the functional polymer material medium with high emission characteristic value and the diluent to obtain a polymer solution;

[0021] Mixing the micro-nano medium with high scattering characteristic value, the dispersing agent and the polymer solution to obtain a coating solution;

[0022] Mixing the coating solution with the curing agent, and coating on the substrate, and after curing, the optical superstructure coating is obtained.

[0023] Preferably, the mass ratio of the functional polymer material medium with high emission characteristic value, the diluent, the micro-nano medium with high scattering characteristic value, the dispersant, and the curing agent is (180-200):(25-30):(43.7-276.92):(2.19-13.85):(90-100);

[0024] The diluent comprises at least one of nitro paint diluent, perchloroethylene paint diluent, phenolic paint diluent, acrylic paint diluent, alkyd paint diluent, epoxy paint diluent, phenolic paint diluent, silicone paint diluent, and methyl ethyl ketone;

[0025] The dispersant comprises at least one of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, cetyl trimethyl ammonium bromide, polyoxyethylene stearate, polyvinyl alcohol, sodium polyacrylate, polyacrylamide, polyphosphate, colloidal silica, and hydroxyethyl cellulose;

[0026] The curing agent comprises at least one of aromatic polyamine, imidazole, acid anhydride, polyisocyanate curing agent, nitrogen-containing phenolic resin, aromatic ether ester diarylamine, acid anhydride curing agent, polyether amine curing agent, thiol amine epoxy curing agent, trimellitic anhydride, m-phenylenediamine curing agent, methyl tetrahydrophthalic anhydride, dicyandiamide, and ethyl n-butyl ester.

[0027] In a third aspect, the present application further provides an application of the optical super-structure coating in the preparation of a high-pressure temperature-reducing power transmission line.

[0028] In a fourth aspect, the present application further provides a high-pressure temperature-reducing power transmission line, comprising a power transmission line body and a coating layer on the power transmission line body, wherein the coating layer is the optical super-structure coating.

[0029] Preferably, the high-pressure temperature-reducing power transmission line further comprises an anticorrosive coating layer on the surface of the optical super-structure coating.

[0030] The optical super-structure coating for high-pressure temperature-reducing power transmission lines, the preparation method and the application thereof have the following technical effects compared with the prior art:

[0031] 1. The optical super-structure coating for high-pressure temperature-reducing power transmission lines has a reflectivity of >85% in the ultraviolet radiation-visible light-near infrared wave band interval of 0.2-2.5 μm, and an emissivity of >91% in the mid-infrared thermal radiation window (8-13 μm) wave band; compared with the power transmission line without the optical super-structure coating, the power transmission line with the optical super-structure coating can achieve a daytime temperature reduction amplitude of >12%;

[0032] 2. The high-pressure temperature-reducing power transmission line of the present application further comprises an anticorrosive coating layer on the surface of the optical super-structure coating, the high-pressure temperature-reducing power transmission line has an ultraviolet aging resistance of ≥2000 hours and no discoloration / cracking phenomenon, a flame-retardant performance of FV-0 level, and a surface water contact angle of >120 degrees.

[0033] 3. The optical super-structure coating for high-voltage transmission line cooling in the present application provides reliable protection for high-voltage transmission line and power equipment in high solar radiation environment, and also provides obvious passive cooling effect, greatly reduces the cost of high-voltage transmission line cooling, and the average theoretical capacity increases by more than 10%, and reduces the occurrence rate of thermal failure. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0035] Figure 1 is a schematic diagram of the cross-sectional structure of the high-voltage cooling transmission line of the present application;

[0036] Figure 2 is a SEM image of the cross-sectional morphology of the optical super-structure coating for high-voltage transmission line cooling in one specific embodiment of the present application;

[0037] Figure 3 is a real object diagram before and after the wire is coated with the optical super-structure coating in one specific embodiment of the present application;

[0038] Figure 4 is a scattering efficiency diagram of the high-scattering characteristic value micro-nano medium of the high-reflection layer of the optical super-structure coating for high-voltage transmission line cooling in one specific embodiment of the present application in the solar radiation wave band (0.3-2.5 μm);

[0039] Figure 5 is a temperature data comparison diagram of the high-voltage transmission line coated with the optical super-structure coating and the untreated high-voltage transmission line in multiple specific embodiments of the present application. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0041] It is noted that the order of description of the following embodiments is not intended to imply a preference of such order. Additionally, in the description of the present application, the term "including" means "including but not limited to". Various embodiments of the present application can exist in a range of forms; it should be understood that the description in a range form is merely for the convenience and brevity, and should not be understood as a rigid limitation on the scope of the present application; therefore, it should be considered that the range described has been specifically disclosed all possible sub-ranges and single values within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, regardless of the range. In addition, whenever a numerical range is indicated herein, it refers to any cited number (fraction or integer) within the indicated range.

[0042] The embodiment of the present application provides an optical superstructure coating for temperature reduction of high-voltage transmission lines, which comprises at least one micro-nano medium with high scattering characteristic value and at least one functional polymer material medium with high emission characteristic value.

[0043] Specifically, the micro-nano medium with high scattering characteristic value is determined by a "multi-stage scattering-high efficiency reflection" optical superstructure theoretical system, including shape, particle size, volume fraction, etc.; the polymer material medium with high emission characteristic value is determined by a multi-physical field model, including spectral absorption peak characteristic value, etc.

[0044] The optical superstructure coating for temperature reduction of high-voltage transmission lines of the present application establishes a "multi-stage scattering-high efficiency reflection" optical superstructure theoretical system, constructs a multi-physical field model of high-scattering characteristic value micro-nano medium and high-emissivity functional polymer material medium, coats the optical superstructure coating with high electromagnetic wave resonance characteristics on the outer surface of the high-voltage transmission line, and realizes sustainable and efficient passive cooling of the high-voltage transmission line in a high-temperature environment. After optimization by the multi-physical field model, the micro-nano particles with high forward scattering characteristics are randomly and uniformly distributed in the optical superstructure coating, so as to accurately control the wide-spectrum response peak value of the sunlight band and the mid-infrared thermal radiation band. At the same time, a functional polymer material with high emissivity is selected and optimized by the optical superstructure theoretical system. The present application adopts the "multi-stage scattering-high efficiency reflection" optical superstructure design, and develops an optical superstructure coating with the functions of strong sunlight spectrum reflection, thermal radiation spectrum emission control, anti-ultraviolet, corrosion resistance, aging resistance, etc. The coating effectively solves the safety hidden trouble problem of high-voltage transmission lines and other power equipment caused by high temperature in a high solar radiation environment, and significantly reduces the cost of existing cooling methods.

[0045] The optical superstructure coating for cooling high-voltage transmission lines has effective sustainable passive cooling and strong ultraviolet protection functions in terms of cooling effect and multifunction, and has weather resistance, temperature resistance and ultraviolet aging resistance. The selection structure of the functional polymer material is optimized through a multi-physical field model, and most of the commercial materials that meet the selection of the optical superstructure coating can be used for large-scale industrial production. In terms of material parameters of the reflection layer of the optical superstructure coating, the material selection has universality through the construction of an optical theory system. According to the numerical simulation optimization results of the optical superstructure theory of'multi-scattering-high-efficiency reflection', most of the commercial materials that meet the selection of the optical superstructure coating can be used for large-scale production. In addition, different optical superstructure coatings are designed to meet the cooling needs of different use scenarios of various high-voltage transmission lines and other power equipment.

[0046] In some embodiments, the scattering efficiency S of the micro-nano medium with a high scattering characteristic value ca The scattering efficiency S of the micro-nano medium with a high scattering characteristic value is obtained from the ratio of the scattering cross section to the geometric cross section ca B / A.

[0047] The geometric cross section refers to the two-dimensional cross-sectional area A of the high-scattering characteristic value micro-nano medium passing through the center of the sphere, and the two-dimensional cross-sectional area A is obtained by multiplying the square of the center radius r of the micro-nano medium by pi, A = r 2 π.

[0048] The scattering cross section B is determined by the ratio of the energy power P of the micro-nano medium scattering electromagnetic waves per unit time to the energy I of the incident electromagnetic waves at infinity sa inc B = P sa / I inc .

[0049] In some embodiments, the scattering efficiency S of the micro-nano medium with a high scattering characteristic value in the solar radiation wavelength range of 0.2-2.5 μm is 0.1-20; preferably, the scattering efficiency S is 1-20, and further preferably, the scattering efficiency S is 5-20. ca ca ca

[0050] In some embodiments, the particle size of the micro-nano medium with a high scattering characteristic value follows a Gaussian distribution, with a mean value of 5 nm-5 μm, preferably a diameter of 50 nm-3 μm, and further preferably a diameter of 100 nm-1000 nm.

[0051] ​​​​In some embodiments, the Gaussian distribution of the diameter of the high-scattering characteristic value micro-nano medium in the optical super-structure coating has a mean value of 5 nm to 5 μm and a standard deviation of 5 nm to 1 μm, preferably, a mean value of 50 nm to 3 μm and a standard deviation of 5 nm to 500 nm, further preferably, a mean value of 100 nm to 1000 μm and a standard deviation of 5 nm to 100 nm.

[0052] In some embodiments, the volume fraction of the high-scattering characteristic value micro-nano medium in the optical super-structure coating is 5% to 85%, preferably 10% to 60%, further preferably 15% to 35%. The volume fraction of the high-scattering characteristic value micro-nano medium is the ratio of the total volume D of all micro-nano media in the coating to the total volume E of the entire coating, that is, the volume fraction C = D / E.

[0053] In some embodiments, the spectral absorption peak characteristic value of the high-emissivity characteristic value high polymer material is 4 μm to 50 μm, preferably 6-25 μm, further preferably 8-13 μm.

[0054] In some embodiments, the material used by the high-scattering characteristic value micro-nano medium includes at least one of titanium dioxide, silicon dioxide, zinc oxide, silicon carbide, silicon nitride, zinc sulfide, aluminum oxide, iron oxide, boron nitride, magnesium oxide, barium sulfate, barium carbonate, and aluminum silicate; preferably, the material used by the high-scattering characteristic value micro-nano medium is titanium dioxide, silicon dioxide, and aluminum oxide.

[0055] In some embodiments, the functional high polymer material of the high-emissivity characteristic value is an acid-resistant high polymer, an alkali-resistant high polymer, a waterproof high polymer, and a corrosion-resistant high polymer.

[0056] In some embodiments, the functional high polymer material medium includes at least one of phenolic resin, polyamide resin, polyvinylidene fluoride, fluorine olefin-vinyl ether copolymer, amino resin, alkyd resin, water-based fluorocarbon emulsion resin, furan resin, polyester resin, vinyl resin, acrylic resin, and epoxy resin; preferably, the material used by the functional high polymer material of the high-emissivity characteristic value is acrylic resin, epoxy resin, and silicone resin.

[0057] In some embodiments, the thickness of the optical super-structure coating is 15 μm to 1000 μm, preferably 100 μm to 500 μm, further preferably 200 μm to 400 μm.

[0058] Based on the same inventive concept, the present application also provides a preparation method of the optical super-structure coating for cooling high-voltage transmission lines described above, which comprises the following steps:

[0059] S1, mixing the functional high polymer material medium having a high-emissivity characteristic value and a diluent to obtain a polymer solution;

[0060] S2, mix the micro-nano medium with high scattering characteristic value, the dispersant and the polymer solution to obtain a coating solution;

[0061] S3, mix the coating solution with the curing agent, and coat on the substrate, and after curing, an optical super-structured coating is obtained.

[0062] In some embodiments, the mass ratio of the functional high polymer material medium with high emission characteristic value, the diluent, the micro-nano medium with high scattering characteristic value, the dispersant and the curing agent is (180-200):(25-30):(43.7-276.92):(2.19-13.85):(90-100).

[0063] The diluent is selected from one or more of nitro paint diluent, perchloroethylene paint diluent, phenolic paint diluent, acrylic paint diluent, alkyd paint diluent, epoxy paint diluent, phenolic paint diluent, and silicone paint diluent.

[0064] The dispersant is selected from one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, cetyl trimethyl ammonium bromide, polyoxyethylene stearate, polyvinyl alcohol, sodium polyacrylate, polyacrylamide, polyphosphate, colloidal silica, and hydroxyethyl cellulose.

[0065] The curing agent is selected from one or more of aromatic polyamine, imidazole, acid anhydride, polyisocyanate curing agent, nitrogen-containing phenolic resin, aryl ether ester diarylamine, acid anhydride curing agent, polyether amine curing agent, thiol amine epoxy curing agent, trimellitic anhydride, m-phenylenediamine curing agent, methyl tetrahydrophthalic anhydride, dicyandiamide, and n-butyl alcohol (molecular formula C6H 14 O2).

[0066] In some embodiments, the functional high polymer material medium with high emission characteristic value and the diluent are mixed and stirred at room temperature to obtain a polymer solution; the micro-nano medium with high scattering characteristic value, the dispersant and the polymer solution are mixed and stirred at room temperature to obtain a coating solution; the coating solution is mixed with the curing agent, and coated on the substrate, and after room temperature curing, an optical super-structured coating is obtained.

[0067] Based on the same inventive concept, the application also provides an application of the optical super-structured coating in the preparation of a high-voltage temperature-reducing power transmission line.

[0068] Based on the same inventive concept, the application also provides a high-voltage temperature-reducing power transmission line, which comprises a power transmission line body and a coating layer on the power transmission line body, and the coating layer is an optical super-structured coating.

[0069] In some embodiments, an anti-corrosion coating is also included, which is located on the surface of the optical metastructure coating. Specifically, the anti-corrosion coating is applied to the surface of the optical metastructure coating to obtain the anti-corrosion coating. The anti-corrosion coating is a commercially available anti-corrosion coating. In this invention, the anti-corrosion coating is provided by Guangzhou Hucheng Building Materials Technology Co., Ltd., and the model is HEME high-performance epoxy modified elastic composite anti-corrosion and waterproof coating.

[0070] Specifically, this optical meta-coating has two application methods: one is during the production process of power transmission lines, i.e., before they are put into use, the coating solution is applied to the high-voltage power transmission lines by machine, and then cured at room temperature (25°C) to form the optical meta-coating; the other is for high-voltage power transmission lines already in use, where the coating solution is applied to the high-voltage power transmission lines by a coating machine, and then cured at room temperature to form the optical meta-coating. Regardless of the method, the optical meta-coating will ultimately be applied to high-voltage power transmission lines to achieve their cooling function.

[0071] Specifically, such as Figure 1 As shown, it illustrates the structure of a high-voltage cooling transmission line, which includes a high-voltage transmission line and an optical meta-coating on the outer periphery of the high-voltage transmission line, the optical meta-coating containing a micro / nano medium with high scattering characteristic values.

[0072] The following further illustrates the optical meta-coating for cooling high-voltage transmission lines, its preparation method, and its application through specific embodiments. This section further describes the invention in conjunction with specific embodiments, but should not be construed as limiting the invention. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art. Unless otherwise specified, the reagents, methods, and equipment used in this invention are conventional reagents, methods, and equipment in the art.

[0073] The varnish, hardener, and thinner used in the following examples and comparative examples were supplied by Guangzhou Chenghong Automotive Supplies Co., Ltd., and their models are KU6000 (acrylic resin, specifically Kanal KU6000 Diamond Varnish), KS2000 (acrylic resin, specifically Kanal KS2000 High Concentration Varnish), KF62 (methyl ethyl ketone), and KS201 (ethanol n-butyl ester).

[0074] The anti-corrosion coatings used in the following examples and comparative examples were provided by Guangzhou Hucheng Building Materials Technology Co., Ltd., and the model is HEME high-performance epoxy modified elastic composite anti-corrosion and waterproof coating.

[0075] Example 1

[0076] This application provides an optical meta-coating for cooling high-voltage transmission lines, comprising at least one micro / nano medium with high scattering characteristic value and at least one functional polymer material medium with high emission characteristic value;

[0077] Specifically, the micro-nano medium with high scattering characteristic value is determined by the "multi-scattering-high reflection" optical superstructure theory system, and titanium dioxide is selected, the center particle size is 200 nm, the geometric area can be obtained A=r 2 pi, A=3.14x10 -14 m 2 , P sa =1.256x10 -13 W / m 2 , I inc =1W, B=P sa / I inc , B=1.256x10 -13 m 2 , S ca =B / A, S ca =4, and the scattering efficiency S ca of the micro-nano medium with a particle size of 0.1-5 is 0.1-5. The particle size of the micro-nano medium titanium dioxide conforms to the Gaussian distribution, the mean value is 5nm-3pm, the standard deviation is 5nm-500nm, and the volume fraction C of the micro-nano medium in the optical superstructure coating is 5%. The center particle size is the particle size with the highest proportion in the normal distribution of the micro-nano medium particle size distribution. The thickness of the optical superstructure coating for high-voltage transmission line cooling is determined by the multi-physical field simulation system, which is 200pm.

[0078] The volume fraction of the above high-scattering characteristic value micro-nano medium titanium dioxide is the ratio of the total volume D of all micro-nano media in the coating to the total volume E of the polymer material and the micro-nano medium, that is, the volume fraction C=D / E.

[0079] The specific experimental process is carried out by weighing with a high-precision balance, so the volume fraction C is converted to the mass fraction F, and the weight of the required micro-nano medium and polymer material is further obtained, wherein the density of the micro-nano medium titanium dioxide is p1=4g / cm 3 , the density of the polymer medium varnish KU6000 (acrylic resin) is p2=1.3g / cm 3 , the density of the polymer material curing agent KS201 (n-butyl alcohol) is p 3＝ 0.90g / cm 3 , and the density of the dispersant is p 4＝ 0.90g / cm 3 , the weight of the required micro-nano medium m1, the weight of the polymer material m2, the weight of the curing agent m3, and the mass of the dispersant m4 can be obtained by the following formula:

[0080] Formula 1

[0081]

[0082] Equation 2 can be obtained from Equation 1

[0083]

[0084] Given the volume fraction C, the micro-nano medium density p1, the high polymer material varnish p2, the high polymer material curing agent p3, the dispersant p4, and the weight of the micro-nano medium or the weight of the high polymer material, the weight of another material can be obtained.

[0085] The embodiment also provides a preparation method of the optical super-structured coating.

[0086] S1, 180 g of varnish KU6000 (acrylic resin) is mixed with 27 g of diluent KF62 (methyl ethyl ketone), the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25 DEG C, and the stirring lasts for 15 minutes to obtain a polymer solution;

[0087] S2, 50.72 g of titanium dioxide particles with a central particle size of 200 nm is mixed with 2.54 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25 DEG C, and the stirring lasts for 25 minutes to finally obtain a coating solution;

[0088] S3, the coating solution obtained in S2 is mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25 DEG C, and the stirring lasts for 10 minutes, and then the coating solution is coated on the surface of the power transmission line, and an optical super-structured coating with a thickness of 200 μm is formed after curing at room temperature (25 DEG C).

[0089] The embodiment also provides a high-voltage cooling power transmission line, according to the method in Embodiment 1, the coating solution is mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25 DEG C, and the stirring lasts for 10 minutes, and then the coating solution is coated on the surface of the power transmission line, and an optical super-structured coating with a thickness of 200 μm is formed after curing at room temperature (25 DEG C). Then, 100 μm of anticorrosive paint is coated on the surface of the optical super-structured coating to obtain an anticorrosive coating.

[0090] Embodiment 2

[0091] The embodiment of the application provides an optical super-structured coating, which comprises at least one micro-nano medium with a high scattering characteristic value and at least one functional high polymer material medium with a high emission characteristic value.

[0092] Specifically, using the "multi-level scattering-high-efficiency reflection" optical metastructure theory, titanium dioxide was selected as the micro / nano medium with high scattering characteristic values. Its central particle size is 250 nm, and its geometric area can be calculated as A = r. 2 π, A = 4.9 × 10 -14 m 2 P sa =2.94×10 -13 W / m 2 I inc =1W, B=P sa / I inc B = 2.94 × 10 -13 m 2 S ca =B / A,S ca =6, the scattering efficiency S of micro / nano media with other particle sizes ca The particle size of the micro / nano-medium titanium dioxide follows a Gaussian distribution with a mean of 5 nm to 2.5 μm and a standard deviation of 5 nm to 500 nm. The volume fraction (C) of the micro / nano-medium in the optical metamaterial coating is 5%. A high-emission polymeric material, acrylic resin (KU6000), with a spectral absorption peak characteristic value of 4–12 μm, was selected as the medium through a multiphysics model. The central particle size refers to the particle size with the highest proportion in the normally distributed micro / nano-medium particle size distribution. The thickness of the optical metamaterial coating used for cooling high-voltage transmission lines was determined to be 200 μm through multiphysics simulation.

[0093] The volume fraction of the high scattering characteristic value micro / nano-medium titanium dioxide is obtained by the ratio of the total volume D of all micro / nano-mediums inside the coating to the total volume E of the polymer material and micro / nano-mediums, i.e., volume fraction C = D / E.

[0094] The specific experimental procedure involved weighing using a high-precision balance. Therefore, the volume fraction C was converted to a mass fraction F to obtain the weights of the required micro / nano-medium and polymer materials. The density of the micro / nano-medium titanium dioxide was p1 = 4 g / cm³. 3 The density of polymeric medium varnish KU6000 (acrylic resin) is p2 = 1.3 g / cm³. 3 The density of the polymer curing agent KS201 (ethanol n-butyl ester) is p 3＝ 0.90g / cm 3 The density of the dispersant is p 4＝ 0.90g / cm 3 According to the same calculation formula in Example 1, the weight m1 of the required micro / nano medium, the weight m2 of the polymer material, the weight m3 of the curing agent, and the mass m4 of the dispersant can be obtained.

[0095] The known volume fraction C, the micro-nano medium density p1, the high polymer material varnish p2, the high polymer material curing agent p3, the dispersant p4, and the weight of the micro-nano medium or the weight of the high polymer material, that is, the weight of another material can be obtained.

[0096] The embodiment also provides a preparation method of the optical super-structure coating.

[0097] S1, 180 g of varnish KU6000 (acrylic resin) is mixed with 27 g of diluent KF62 (methyl ethyl ketone), a stirring tool is a magnetic stirrer, a rotating speed is 800 r / min, an environmental temperature is 25 DEG C, and stirring lasts for 15 min to obtain a polymer solution;

[0098] S2, 50.72 g of titanium dioxide particles with a central particle size of 250 nm is mixed with 2.54 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, a stirring tool is a magnetic stirrer, a rotating speed is 800 r / min, an environmental temperature is 25 DEG C, and stirring lasts for 25 min to finally obtain a coating solution;

[0099] S3, the coating solution obtained in S2 is mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred, a stirring tool is a magnetic stirrer, a rotating speed is 800 r / min, an environmental temperature is 25 DEG C, and stirring lasts for 10 min, and the coating solution is coated on the surface of the power transmission line to form an optical super-structure coating with a thickness of 200 mu m after room temperature curing.

[0100] The embodiment also provides a high-voltage cooling power transmission line, according to the method in the above embodiment 2, the coating solution is mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred, a stirring tool is a magnetic stirrer, a rotating speed is 800 r / min, an environmental temperature is 25 DEG C, and stirring lasts for 10 min, and the coating solution is coated on the surface of the power transmission line to form an optical super-structure coating with a thickness of 200 mu m after room temperature curing, and then 100 mu m of anticorrosive paint is coated on the surface of the optical super-structure coating to obtain an anticorrosive coating.

[0101] Embodiment 3

[0102] The embodiment of the application provides an optical super-structure coating, which comprises at least one micro-nano medium with a high scattering characteristic value and at least one functional high polymer material medium with a high emission characteristic value.

[0103] Specifically, the micro-nano medium with a high scattering characteristic value is determined by using titanium dioxide with a central particle size of 350 nm through a multi-stage scattering-high-efficiency reflection optical super-structure theoretical system, and a geometric area is A = r 2 π, A = 9.62 * 10 -15 m 2 , P sa=3.69×10 -13 W / m 2 I inc =1W, B=P sa / I inc B = 3.69 × 10 -13 m 2 S ca =B / A,S ca =6, the scattering efficiency S of micro / nano media with other particle sizes ca The particle size of the micro / nano-medium titanium dioxide follows a Gaussian distribution, with a mean of 10 nm to 4 μm and a standard deviation of 5 nm to 500 nm. The volume fraction (C) of the micro / nano-medium in the optical metamaterial coating is 25%. A high-emission polymer varnish KS2000 with a spectral absorption peak characteristic value of 8–13 μm was selected using a multiphysics model. The center particle size refers to the particle size with the highest proportion in the normally distributed micro / nano-medium particle size distribution. The thickness of the optical metamaterial coating used for cooling high-voltage transmission lines was determined to be 350 μm using a multiphysics simulation system.

[0104] The volume fraction of the high scattering characteristic value micro / nano-medium titanium dioxide is obtained by the ratio of the total volume D of all micro / nano-mediums inside the coating to the total volume E of the polymer material and micro / nano-mediums, i.e., volume fraction C = D / E.

[0105] The specific experimental procedure involved weighing using a high-precision balance. Therefore, the volume fraction C was converted to a mass fraction F to obtain the weights of the required micro / nano-medium and polymer materials. The density of the micro / nano-medium titanium dioxide was p1 = 4 g / cm³. 3 The density of KS2000 polymer varnish (acrylic resin) is p2 = 1.3 g / cm³. 3 The density of the polymer curing agent KS201 (ethanol n-butyl ester) is p 3＝ 0.90g / cm 3 The density of the dispersant is p 4＝ 0.90g / cm 3 According to the same calculation formula in Example 1, the weight m1 of the required micro / nano medium, the weight m2 of the polymer material, the weight m3 of the curing agent, and the mass m4 of the dispersant can be obtained.

[0106] Given the volume fraction C, the density p1 of the micro / nano medium, the varnish p2 of the polymer material, the curing agent p3 of the polymer material, and the dispersant p4, the weight of the other material can be obtained by introducing the weight of the micro / nano medium or the weight of the polymer material.

[0107] This embodiment also provides a method for preparing the above-mentioned optical meta-coating, including the following steps:

[0108] S1, 180 g of varnish KS2000 is mixed with 27 g of diluent KF62 (methyl ethyl ketone), the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the ambient temperature is 25 DEG C, and the stirring lasts for 15 minutes to obtain a polymer solution;

[0109] S2, 339.90 g of titanium dioxide particles with a central particle size of 350 nm is mixed with 16.99 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the ambient temperature is 25 DEG C, and the stirring lasts for 25 minutes to finally obtain a coating solution;

[0110] S3, the coating solution obtained in S2 is mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the ambient temperature is 25 DEG C, and the stirring lasts for 10 minutes, and then the coating solution is coated on the surface of a power transmission line to form an optical superstructure coating with a thickness of 350 μm after room temperature curing.

[0111] The embodiment also provides a high-voltage cooling power transmission line. The coating solution is mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred according to the method in Embodiment 3, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the ambient temperature is 25 DEG C, and the stirring lasts for 10 minutes, and then the coating solution is coated on the surface of a power transmission line to form an optical superstructure coating with a thickness of 350 μm after room temperature curing. Then, 100 μm of anticorrosive paint is coated on the surface of the optical superstructure coating to obtain an anticorrosive coating.

[0112] Embodiment 4

[0113] The embodiment of the application provides an optical superstructure coating, which comprises at least one micro-nano medium with a high scattering characteristic value and at least one functional polymer material medium with a high emission characteristic value.

[0114] Specifically, the micro-nano medium with a high scattering characteristic value is determined by a multi-stage scattering-high-efficiency reflection optical superstructure theoretical system to be titanium dioxide with a central particle size of 375 nm, and the geometric area is A = r 2 π, A = 1.1 x 10 -13 m 2 , P sa = 4.42 x 10 -13 W / m 2 , I inc = 1 W, B = P sa / I inc , B = 4.42 x 10 -13 m 2 , S ca = B / A, S ca= 4, the micro-nano medium scattering efficiency S of the rest particle size ca The volume fraction C of the high scattering characteristic value micro-nano medium titanium dioxide is the ratio of the total volume D of all micro-nano media in the coating to the total volume E of the polymer material and the micro-nano medium, that is, the volume fraction C = D / E. The center particle size refers to the particle size with the highest proportion in the normal distribution of the micro-nano medium particle size distribution. The thickness of the optical superstructure coating for cooling of high-voltage transmission lines is determined by the multi-physical field simulation system to be 300 μm.

[0115] The volume fraction C of the high scattering characteristic value micro-nano medium titanium dioxide is the ratio of the total volume D of all micro-nano media in the coating to the total volume E of the polymer material and the micro-nano medium, that is, the volume fraction C = D / E.

[0116] The specific experimental process is to weigh with a high-precision balance, so the volume fraction C is converted to the mass fraction F, and the weight of the required micro-nano medium and the polymer material is further obtained, wherein the density of the micro-nano medium titanium dioxide is p1 = 4 g / cm 3 , the density of the polymer medium varnish KS2000 (acrylic resin) is p2 = 1.3 g / cm 3 , the density of the polymer material curing agent KS201 (n-butyl alcohol) is p 3＝ 0.90 g / cm 3 , and the density of the dispersant is p 4＝ 0.90 g / cm 3 , and the weight of the required micro-nano medium m1, the weight of the polymer material m2, the weight of the curing agent m3, and the mass of the dispersant m4 can be obtained according to the same calculation formula in Example 1.

[0117] Given the volume fraction C, the micro-nano medium density p1, the polymer material varnish p2, the polymer material curing agent p3, and the dispersant p4, the weight of the micro-nano medium or the weight of the polymer material can be obtained, that is, the weight of the other material.

[0118] The embodiment also provides a preparation method of the above-mentioned optical superstructure coating, comprising the following steps:

[0119] S1, mix 180 g of varnish KS2000 with 27 g of diluent KF62 (methyl ethyl ketone), the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25℃, and the stirring lasts for 15 minutes to obtain a polymer solution;

[0120] S2, 250.60 g of titanium dioxide particles with a center particle size of 375 nm were mixed with 12.53 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, the stirring tool was a magnetic stirrer, the stirring speed was 800 r / min, the environmental temperature was 25℃, and the stirring lasted for 25 minutes, and finally a coating solution was obtained;

[0121] S3, the coating solution obtained in S2 was mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred, the stirring tool was a magnetic stirrer, the stirring speed was 800 r / min, the environmental temperature was 25℃, and the stirring lasted for 10 minutes, and was coated on the surface of the power transmission line, and after room temperature curing, an optical superstructure coating with a thickness of 300 μm was formed.

[0122] The embodiment also provides a high-voltage cooling power transmission line. The coating solution is mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred according to the method in Embodiment 4, the stirring tool is a magnetic stirrer, the stirring speed is 800 r / min, the environmental temperature is 25℃, and the stirring lasts for 10 minutes, and is coated on the surface of the power transmission line, and after room temperature curing, an optical superstructure coating with a thickness of 300 μm is formed. Then, a 100 μm anticorrosive coating is coated on the surface of the optical superstructure coating to obtain an anticorrosive coating.

[0123] Embodiment 5

[0124] The embodiment of the application provides an optical superstructure coating, which comprises at least one micro-nano medium with a high scattering characteristic value and at least one functional polymer material medium with a high emission characteristic value.

[0125] Specifically, the micro-nano medium with a high scattering characteristic value is determined by a "multi-stage scattering-high efficiency reflection" optical superstructure theoretical system to be titanium dioxide with a center particle size of 200 nm, and the geometric area is A=r 2 π, A=3.14x10 -13 m 2 , P sa =1.26x10 -13 W / m 2 , I inc =1 W, B=P sa / I inc , B=1.26x10 -13 m 2 , S ca =B / A, S ca =4, and the scattering efficiency S caThe particle size of the micro / nano-medium titanium dioxide follows a Gaussian distribution with a mean of 5 nm to 3 μm and a standard deviation of 5 nm to 500 nm. The volume fraction (C) of the micro / nano-medium in the optical metamaterial coating is 10%. The high emission characteristic value polymer material, acrylic resin KU6000, with a spectral absorption peak characteristic value of 4–12 μm, was selected as the medium through a multiphysics model. The center particle size refers to the particle size with the highest proportion in the normally distributed micro / nano-medium particle size distribution. The thickness of the optical metamaterial coating used for cooling high-voltage transmission lines was determined to be 200 μm through multiphysics simulation.

[0126] The volume fraction of the high scattering characteristic value micro / nano-medium titanium dioxide is obtained by the ratio of the total volume D of all micro / nano-mediums inside the coating to the total volume E of the polymer material and micro / nano-mediums, i.e., volume fraction C = D / E.

[0127] The specific experimental procedure involved weighing using a high-precision balance. Therefore, the volume fraction C was converted to a mass fraction F to obtain the weights of the required micro / nano-medium and polymer materials. The density of the micro / nano-medium titanium dioxide was p1 = 4 g / cm³. 3 The density of polymeric medium varnish KU6000 (acrylic resin) is p2 = 1.3 g / cm³. 3 The density of the polymer curing agent KS201 (ethanol n-butyl ester) is p 3＝ 0.90g / cm 3 The density of the dispersant is p 4＝ 0.90g / cm 3 According to the same calculation formula in Example 1, the weight m1 of the required micro / nano medium, the weight m2 of the polymer material, the weight m3 of the curing agent, and the mass m4 of the dispersant can be obtained.

[0128] Given the volume fraction C, the density p1 of the micro / nano medium, the varnish p2 of the polymer material, the curing agent p3 of the polymer material, and the dispersant p4, the weight of the other material can be obtained by introducing the weight of the micro / nano medium or the weight of the polymer material.

[0129] This embodiment also provides a method for preparing the above-mentioned optical meta-coating, including the following steps:

[0130] S1. Mix 180g of KU6000 varnish (acrylic resin) with 27g of KF62 diluent (methyl ethyl ketone). Use a magnetic stirrer at 800r / min and an ambient temperature of 25℃ for 15 minutes to obtain a polymer solution.

[0131] S2, 108.31 g of titanium dioxide particles with a center particle size of 200 nm were mixed with 5.42 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, the stirring tool was a magnetic stirrer, the rotation speed was 800 r / min, the environmental temperature was 25 °C, and the stirring lasted for 25 minutes, finally obtaining a coating solution;

[0132] S3, the coating solution obtained in S2 was mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred, the stirring tool was a magnetic stirrer, the rotation speed was 800 r / min, the environmental temperature was 25 °C, and the stirring lasted for 10 minutes, and was coated on the surface of the power transmission line, and after room temperature curing, an optical superstructure coating with a thickness of 200 μm was formed.

[0133] The embodiment also provides a high-voltage cooling power transmission line. The coating solution is mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred according to the method in Embodiment 5, the stirring tool is a magnetic stirrer, the rotation speed is 800 r / min, the environmental temperature is 25 °C, and the stirring lasts for 10 minutes, and is coated on the surface of the power transmission line, and after room temperature curing, an optical superstructure coating with a thickness of 200 μm is formed. Then, 100 μm of anticorrosive paint is coated on the surface of the optical superstructure coating to obtain an anticorrosive coating.

[0134] Embodiment 6

[0135] The embodiment of the application provides an optical superstructure coating, which comprises at least one micro-nano medium with a high scattering characteristic value and at least one functional polymer material medium with a high emission characteristic value.

[0136] Specifically, the micro-nano medium with a high scattering characteristic value is determined by a "multi-stage scattering-high-efficiency reflection" optical superstructure theoretical system, and titanium dioxide is selected, wherein the center particle size is 250 nm, the geometric area is A = r 2 π, A = 4.9 x 10 -14 m 2 , P sa = 2.45 x 10 -13 W / m 2 , I inc = 1 W, B = P sa / I inc , B = 2.45 x 10 -13 m 2 , S ca = B / A, S ca = 5, and the scattering efficiency S caThe particle size of the micro / nano-medium titanium dioxide follows a Gaussian distribution with a mean of 5 nm to 3 μm and a standard deviation of 5 nm to 500 nm. The volume fraction (C) of the micro / nano-medium in the optical metamaterial coating is 15%. The high emission characteristic value polymeric material, acrylic resin KU6000, with a spectral absorption peak characteristic value of 4–12 μm, was selected as the medium through a multiphysics model. The center particle size refers to the particle size with the highest proportion in the normally distributed micro / nano-medium particle size distribution. The thickness of the optical metamaterial coating used for cooling high-voltage transmission lines was determined to be 300 μm through multiphysics simulation.

[0137] The volume fraction of the high scattering characteristic value micro / nano-medium titanium dioxide is obtained by the ratio of the total volume D of all micro / nano-mediums inside the coating to the total volume E of the polymer material and micro / nano-mediums, i.e., volume fraction C = D / E.

[0138] The specific experimental procedure involved weighing using a high-precision balance. Therefore, the volume fraction C was converted to a mass fraction F to obtain the weights of the required micro / nano-medium and polymer materials. The density of the micro / nano-medium titanium dioxide was p1 = 4 g / cm³. 3 The density of polymeric medium varnish KU6000 (acrylic resin) is p2 = 1.3 g / cm³. 3 The density of the polymer curing agent KS201 (ethanol n-butyl ester) is p 3＝ 0.90g / cm 3 The density of the dispersant is p 4＝ 0.90g / cm 3 According to the same calculation formula in Example 1, the weight m1 of the required micro / nano medium, the weight m2 of the polymer material, the weight m3 of the curing agent, and the mass m4 of the dispersant can be obtained.

[0139] Given the volume fraction C, the density p1 of the micro / nano medium, the varnish p2 of the polymer material, the curing agent p3 of the polymer material, and the dispersant p4, the weight of the other material can be obtained by introducing the weight of the micro / nano medium or the weight of the polymer material.

[0140] This embodiment also provides a method for preparing the above-mentioned optical meta-coating, including the following steps:

[0141] S1. Mix 180g of KU6000 varnish (acrylic resin) with 27g of KF62 diluent (methyl ethyl ketone). Use a magnetic stirrer at 800r / min and an ambient temperature of 25℃ for 15 minutes to obtain a polymer solution.

[0142] S2, 174.28 g of titanium dioxide particles with a center particle size of 250 nm were mixed with 8.71 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, the stirring tool was a magnetic stirrer, the rotation speed was 800 r / min, the environmental temperature was 25 °C, and the stirring lasted for 25 minutes, and finally a coating solution was obtained;

[0143] S3, the coating solution obtained in S2 was mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred, the stirring tool was a magnetic stirrer, the rotation speed was 800 r / min, the environmental temperature was 25 °C, and the stirring lasted for 10 minutes, and was coated on the surface of the power transmission line, and after room temperature curing, an optical superstructure coating with a thickness of 300 μm was formed.

[0144] The embodiment also provides a high-voltage cooling power transmission line. The coating solution is mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred according to the method in Embodiment 6, the stirring tool is a magnetic stirrer, the rotation speed is 800 r / min, the environmental temperature is 25 °C, and the stirring lasts for 10 minutes, and is coated on the surface of the power transmission line, and after room temperature curing, an optical superstructure coating with a thickness of 300 μm is formed. Then, 100 μm of anticorrosive paint is coated on the surface of the optical superstructure coating to obtain an anticorrosive coating.

[0145] Embodiment 7

[0146] The optical superstructure coating provided by the embodiment includes at least one micro-nano medium with a high scattering characteristic value and at least one functional polymer material medium with a high emission characteristic value.

[0147] Specifically, the micro-nano medium with a high scattering characteristic value is determined by the "multi-stage scattering-high efficiency reflection" optical superstructure theoretical system to be titanium dioxide with a center particle size of 300 nm, and the geometric area is A = r 2 π, A = 7.07 x 10 -14 m 2 , P sa = 2.83 x 10 -13 W / m 2 , I inc = 1 W, B = P sa / I inc , B = 2.83 x 10 -13 m 2 , S ca = B / A, S ca = 4, and the scattering efficiency S caThe particle size of the micro / nano-medium titanium dioxide follows a Gaussian distribution with a mean of 5 nm to 2.5 μm and a standard deviation of 5 nm to 500 nm. The volume fraction (C) of the micro / nano-medium in the optical metamaterial coating is 20%. A high-emission polymer varnish KS2000 with a spectral absorption peak characteristic value of 8–13 μm was selected using a multiphysics model. The center particle size refers to the particle size with the highest proportion in the normally distributed micro / nano-medium particle size distribution. The thickness of the optical metamaterial coating used for cooling high-voltage transmission lines was determined to be 300 μm using a multiphysics simulation system.

[0148] The volume fraction of the high scattering characteristic value micro / nano-medium titanium dioxide is obtained by the ratio of the total volume D of all micro / nano-mediums inside the coating to the total volume E of the polymer material and micro / nano-mediums, i.e., volume fraction C = D / E.

[0149] The specific experimental procedure involved weighing using a high-precision balance. Therefore, the volume fraction C was converted to a mass fraction F to obtain the weights of the required micro / nano-medium and polymer materials. The density of the micro / nano-medium titanium dioxide was p1 = 4 g / cm³. 3 The density of KS2000 polymer varnish (acrylic resin) is p2 = 1.3 g / cm³. 3 The density of the polymer curing agent KS201 (ethanol n-butyl ester) is p 3＝ 0.90g / cm 3 The density of the dispersant is p 4＝ 0.90g / cm 3 According to the same calculation formula in Example 1, the weight m1 of the required micro / nano medium, the weight m2 of the polymer material, the weight m3 of the curing agent, and the mass m4 of the dispersant can be obtained.

[0150] Given the volume fraction C, the density p1 of the micro / nano medium, the varnish p2 of the polymer material, the curing agent p3 of the polymer material, and the dispersant p4, the weight of the other material can be obtained by introducing the weight of the micro / nano medium or the weight of the polymer material.

[0151] This embodiment also provides a method for preparing the above-mentioned optical meta-coating, including the following steps:

[0152] S1. Mix 180g of KS2000 varnish with 27g of KF62 (methyl ethyl ketone) thinner. Use a magnetic stirrer at 800r / min and an ambient temperature of 25℃ for 15 minutes to obtain a polymer solution.

[0153] S2, 250.60 g of titanium dioxide particles with a center particle size of 300 nm were mixed with 12.53 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, the stirring tool was a magnetic stirrer, the rotation speed was 800 r / min, the environmental temperature was 25°C, and the stirring lasted for 25 minutes, finally obtaining a coating solution;

[0154] S3, the coating solution obtained in S2 was mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred, the stirring tool was a magnetic stirrer, the rotation speed was 800 r / min, the environmental temperature was 25°C, and the stirring lasted for 10 minutes, and was coated on the surface of the power transmission line, and after room temperature curing, an optical superstructure coating with a thickness of 300 μm was formed.

[0155] The embodiment also provides a high-voltage cooling power transmission line. The coating solution is mixed with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) and stirred according to the method in Embodiment 7, the stirring tool is a magnetic stirrer, the rotation speed is 800 r / min, the environmental temperature is 25°C, and the stirring lasts for 10 minutes, and is coated on the surface of the power transmission line, and after room temperature curing, an optical superstructure coating with a thickness of 300 μm is formed. Then, 100 μm of anticorrosive paint is coated on the surface of the optical superstructure coating to obtain an anticorrosive coating.

[0156] Embodiment 8

[0157] The embodiment of the application provides an optical superstructure coating, which comprises at least one micro-nano medium with a high scattering characteristic value and at least one functional polymer material medium with a high emission characteristic value.

[0158] Specifically, the micro-nano medium with a high scattering characteristic value is determined by a "multi-stage scattering-high-efficiency reflection" optical superstructure theoretical system, and titanium dioxide is selected, wherein the center particle size is 300 nm, the geometric area is A = r 2 π, A = 7.07 x 10 -14 m 2 , P sa = 3.53 x 10 -13 W / m 2 , I inc = 1 W, B = P sa / I inc , B = 3.53 x 10 -13 m 2 , S ca = B / A, S ca = 5, and the scattering efficiency S caThe particle size of the micro / nano-medium titanium dioxide follows a Gaussian distribution with a mean of 5 nm to 3 μm and a standard deviation of 5 nm to 500 nm. The volume fraction (C) of the micro / nano-medium in the optical metamaterial coating is 15%. The high emission characteristic value polymer material, acrylic resin KU6000, with a spectral absorption peak characteristic value of 4–12 μm, was selected as the medium through a multiphysics model. The center particle size refers to the particle size with the highest proportion in the normally distributed micro / nano-medium particle size distribution. The thickness of the optical metamaterial coating used for cooling high-voltage transmission lines was determined to be 330 μm through multiphysics simulation.

[0159] The volume fraction of the high scattering characteristic value micro / nano-medium titanium dioxide is obtained by the ratio of the total volume D of all micro / nano-mediums inside the coating to the total volume E of the polymer material and micro / nano-mediums, i.e., volume fraction C = D / E.

[0160] The specific experimental procedure involved weighing using a high-precision balance. Therefore, the volume fraction C was converted to a mass fraction F to obtain the weights of the required micro / nano-medium and polymer materials. The density of the micro / nano-medium titanium dioxide was p1 = 4 g / cm³. 3 The density of polymeric medium varnish KU6000 (acrylic resin) is p2 = 1.3 g / cm³. 3 The density of the polymer curing agent KS201 (ethanol n-butyl ester) is p 3＝ 0.90g / cm 3 The density of the dispersant is p 4＝ 0.90g / cm 3 According to the same calculation formula in Example 1, the weight m1 of the required micro / nano medium, the weight m2 of the polymer material, the weight m3 of the curing agent, and the mass m4 of the dispersant can be obtained.

[0161] Given the volume fraction C, the density p1 of the micro / nano medium, the varnish p2 of the polymer material, the curing agent p3 of the polymer material, and the dispersant p4, the weight of the other material can be obtained by introducing the weight of the micro / nano medium or the weight of the polymer material.

[0162] This embodiment also provides a method for preparing the above-mentioned optical meta-coating, including the following steps:

[0163] S1. Mix 180g of KU6000 varnish (acrylic resin) with 27g of KF62 diluent (methyl ethyl ketone). Use a magnetic stirrer at 800r / min and an ambient temperature of 25℃ for 15 minutes to obtain a polymer solution.

[0164] S2, 174.28 g of titanium dioxide particles with a center particle size of 300 nm were mixed with 8.71 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, the stirring tool was a magnetic stirrer, the rotation speed was 800 r / min, the environmental temperature was 25 °C, and the stirring lasted for 25 minutes, finally obtaining a coating solution;

[0165] S3, the coating solution obtained in S2 was mixed and stirred with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester), the stirring tool was a magnetic stirrer, the rotation speed was 800 r / min, the environmental temperature was 25 °C, and the stirring lasted for 10 minutes, and was coated on the surface of the power transmission line, and after room temperature curing, an optical superstructure coating with a thickness of 330 μm was formed.

[0166] The embodiment also provides a high-voltage cooling power transmission line. The coating solution is mixed and stirred with 90 g of curing agent KS201 (n-butyl alcohol ethyl ester) according to the method in Embodiment 8, the stirring tool is a magnetic stirrer, the rotation speed is 800 r / min, the environmental temperature is 25 °C, and the stirring lasts for 10 minutes, and is coated on the surface of the power transmission line, and after room temperature curing, an optical superstructure coating with a thickness of 330 μm is formed. Then, a 100 μm anticorrosive coating is coated on the surface of the optical superstructure coating to obtain an anticorrosive coating.

[0167] Comparative Example 1

[0168] The comparative example provides an optical superstructure coating, which comprises: the optical superstructure coating comprises at least one micro-nano medium with a high scattering characteristic value and at least one functional polymer material medium with a high emission characteristic value;

[0169] Specifically, the micro-nano medium with a high scattering characteristic value is determined by the "multi-stage scattering-high efficiency reflection" optical superstructure theoretical system to be titanium dioxide with a center particle size of 20 nm, and the geometric area is A = r 2 π, A = 3.14 x 10 -16 m 2 , P sa = 1.57 x 10 -18 W / m 2 , I inc = 1 W, B = P sa / I inc , B = 1.57 x 10 -18 m 2 , S ca = B / A, S ca = 0.005, and the scattering efficiency S caThe volume fraction C of the high-scattering characteristic value micro-nano medium titanium dioxide is the ratio of the total volume D of all micro-nano medium in the coating to the total volume E of the polymer material and the micro-nano medium, that is, the volume fraction C = D / E.

[0170] The volume fraction C of the high-scattering characteristic value micro-nano medium titanium dioxide is the ratio of the total volume D of all micro-nano medium in the coating to the total volume E of the polymer material and the micro-nano medium, that is, the volume fraction C = D / E.

[0171] The specific experimental process is weighed by a high-precision balance, so the volume fraction C is converted into a mass fraction F, and the weight of the required micro-nano medium and the polymer material is further obtained, wherein the density of the micro-nano medium titanium dioxide is p1 = 4 g / cm 3 , the density of the polymer medium varnish KS2000 (acrylic resin) is p2 = 1.3 g / cm 3 , the density of the polymer material curing agent KS201 (n-butyl alcohol) is p 3＝ 0.90 g / cm 3 , and the density of the dispersant is p 4＝ 0.90 g / cm 3 , and the weight m1 of the required micro-nano medium, the weight m2 of the polymer material, the weight m3 of the curing agent, and the mass m4 of the dispersant can be obtained according to the same calculation formula in Example 1.

[0172] Given the volume fraction C, the micro-nano medium density p1, the polymer material varnish p2, the polymer material curing agent p3, the dispersant p4, and the weight of the micro-nano medium or the weight of the polymer material, the weight of the other material can be obtained.

[0173] The present comparative example also provides a preparation method of the above-mentioned optical superstructure coating, comprising the following steps:

[0174] S1, mix 180 g of varnish KS2000 with 27 g of diluent KF62 (methyl ethyl ketone), the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25°C, and the stirring lasts for 15 minutes to obtain a polymer solution;

[0175] S2, mix 250.60 g of titanium dioxide particles with a center particle size of 20 nm with 12.60 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25°C, and the stirring lasts for 25 minutes to finally obtain a coating solution.

[0176] S3, the coating solution obtained in S2 is mixed with 90 g of curing agent KS201 (n-butyl alcohol ester), the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the ambient temperature is 25°C, the stirring lasts for 10 minutes, and the optical superstructure coating with a thickness of 300 μm is formed on the surface of the power transmission line after room temperature curing.

[0177] The comparative example also provides a high-voltage cooling power transmission line. The coating solution is mixed with 90 g of curing agent KS201 (n-butyl alcohol ester) according to the method in the above comparative example 1, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the ambient temperature is 25°C, the stirring lasts for 10 minutes, and the optical superstructure coating with a thickness of 300 μm is formed on the surface of the power transmission line after room temperature curing. Then, 100 μm of anticorrosive paint is coated on the surface of the optical superstructure coating to obtain an anticorrosive coating.

[0178] Comparative example 2

[0179] The comparative example provides an optical superstructure coating, which comprises at least one micro-nano medium with a high scattering characteristic value and at least one functional high-molecular material medium with a high emission characteristic value.

[0180] Specifically, the micro-nano medium with a high scattering characteristic value is determined by the “multi-stage scattering-high-efficiency reflection” optical superstructure theoretical system to be titanium dioxide, the central particle diameter of which is 50 nm, and the geometric area is A = r 2 π, A = 1.96 x 10 -15 m 2 , P sa = 1.77 x 10 -17 W / m 2 , I inc = 1 W, B = P sa / I inc , B = 1.77 x 10 -17 m 2 , S ca = B / A, S ca = 0.009, and the scattering efficiency S ca of the rest of the micro-nano medium is 0.003-0.01. The particle diameter of the micro-nano medium titanium dioxide obeys Gaussian distribution, the mean value is 5 nm-100 nm, the standard deviation is 1 nm-20 nm, and the volume fraction C is 20%. The high-emission characteristic value high-molecular material medium varnish KS2000 with a spectral absorption peak characteristic value of 8-13 μm is determined by a multi-physical field model, and the coating thickness is 300 μm. The central particle diameter refers to the particle diameter with the highest proportion in the normal distribution of the micro-nano medium particle diameter distribution.

[0181] The volume fraction of the above high-scattering characteristic value micro-nano medium titanium dioxide is the ratio of the total volume D of all micro-nano media in the coating to the total volume E of the polymer material and the micro-nano medium, that is, the volume fraction C = D / E.

[0182] The specific experimental process is carried out by weighing with a high-precision balance, so the volume fraction C is converted into a mass fraction F, and the weight of the required micro-nano medium and polymer material is further obtained, wherein the density of the micro-nano medium titanium dioxide is p1 = 4 g / cm 3 , the density of the polymer medium varnish KS2000 (acrylic resin) is p2 = 1.3 g / cm 3 , the density of the polymer material curing agent KS201 (n-butyl alcohol) is p 3＝ 0.90 g / cm 3 , and the density of the dispersant is p 4＝ 0.90 g / cm 3 , and the weight m1 of the required micro-nano medium, the weight m2 of the polymer material, the weight m3 of the curing agent, and the mass m4 of the dispersant can be obtained according to the same calculation formula in Example 1.

[0183] Given the volume fraction C, the micro-nano medium density p1, the polymer material varnish p2, the polymer material curing agent p3, and the dispersant p4, the weight of the micro-nano medium or the weight of the polymer material can be obtained, that is, the weight of the other material.

[0184] The present comparative example also provides a preparation method of the above optical superstructure coating, comprising the following steps:

[0185] S1, mix 180 g of varnish KS2000 with 27 g of diluent KF62 (methyl ethyl ketone), the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25°C, and the stirring lasts for 15 minutes to obtain a polymer solution;

[0186] S2, mix 250.60 g of titanium dioxide particles with a central particle size of 50 nm with 12.60 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25°C, and the stirring lasts for 25 minutes to finally obtain a coating solution;

[0187] S3, mix and stir the coating solution obtained in S2 with 90 g of curing agent KS201 (n-butyl alcohol), the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25°C, and the stirring lasts for 10 minutes, then coat on the surface of the power transmission line, and form an optical superstructure coating with a thickness of 300 μm after room temperature curing.

[0188] The comparative example also provides a high-voltage power transmission line. The coating solution is mixed with 90 g of curing agent KS201 (n-butyl alcohol) by stirring according to the method in Comparative Example 2. The stirring tool is a magnetic stirrer, the stirring speed is 800 r / min, the environmental temperature is 25°C, the stirring lasts for 10 minutes, and the optical superstructure coating with a thickness of 300 μm is formed on the surface of the power transmission line after curing at room temperature. Then, 100 μm of anticorrosive coating is coated on the surface of the optical superstructure coating to obtain an anticorrosive coating.

[0189] Comparative Example 3

[0190] The comparative example provides an optical superstructure coating, which comprises at least one micro-nano medium with a high scattering characteristic value and at least one functional polymer material medium with a high emission characteristic value.

[0191] Specifically, the micro-nano medium with a high scattering characteristic value is determined by the “multi-stage scattering-high efficiency reflection” optical superstructure theory system to be titanium dioxide with a central particle diameter of 100 nm and a geometric area A = r 2 π, A = 7.85 x 10 -15 m 2 , P sa = 7.07 x 10 -16 W / m 2 , I inc = 1 W, B = P sa / I inc , B = 7.07 x 10 -16 m 2 , S ca = B / A, S ca = 0.09, and the scattering efficiency S ca of the remaining micro-nano medium is 0.01-0.1. The particle diameter of the micro-nano medium titanium dioxide obeys a Gaussian distribution. In this comparative example, the micro-nano medium titanium dioxide with a high scattering characteristic value S ca of 0.01-0.1 is selected, the central particle diameter is 100 nm, the particle diameter obeys a Gaussian distribution, the mean value is 5 nm-130 nm, the standard deviation is 1 nm-45 nm, and the volume fraction C is 20%. The high emission characteristic value polymer material medium acrylic resin KU6000 with a spectral absorption peak characteristic value of 4-12 μm is determined by a multi-physical field model, and the coating thickness is 300 μm. The central particle diameter refers to the particle diameter with the highest proportion in the normal distribution of the particle diameter distribution of the micro-nano medium.

[0192] The volume fraction of the above-mentioned micro-nano medium titanium dioxide with a high scattering characteristic value is the ratio of the total volume D of all micro-nano media in the coating to the total volume E of the polymer material and the micro-nano medium, that is, the volume fraction C = D / E.

[0193] The specific experimental process is carried out by using a high-precision balance to weigh, so the volume fraction C is converted into the mass fraction F, and the weight of the required micro-nano medium and the polymer material is further obtained, wherein the density of the micro-nano medium titanium dioxide is p1=4 g / cm3. 3 , the density of the polymer medium varnish KU6000 (acrylic resin) is p2=1.3 g / cm3. 3 , the density of the polymer material curing agent KS201 (n-butyl alcohol ester) is p 3＝ 0.90 g / cm3. 3 , the density of the dispersant is p 4＝ 0.90 g / cm3. 3 According to the same calculation formula in Example 1, the weight m1 of the required micro-nano medium, the weight m2 of the polymer material, the weight m3 of the curing agent, and the mass m4 of the dispersant can be obtained.

[0194] Given the volume fraction C, the micro-nano medium density p1, the polymer material varnish p2, the polymer material curing agent p3, and the dispersant p4, the weight of the micro-nano medium or the weight of the polymer material can be obtained, and the weight of the other material can be obtained. The present comparative example also provides a preparation method of the above-mentioned optical super-structured coating, comprising the following steps:

[0195] S1, 180 g of varnish KU6000 (acrylic resin) is mixed with 27 g of diluent KF62 (methyl ethyl ketone), the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25°C, and the stirring lasts for 15 minutes to obtain a polymer solution;

[0196] S2, 250.60 g of titanium dioxide particles with a center particle size of 100 nm is mixed with 12.60 g of sodium dodecyl benzene sulfonate and the polymer solution prepared in S1, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25°C, and the stirring lasts for 25 minutes to finally obtain a coating solution;

[0197] S3, the coating solution obtained in S2 is mixed with 90 g of curing agent KS201 (n-butyl alcohol ester) and stirred, the stirring tool is a magnetic stirrer, the rotating speed is 800 r / min, the environmental temperature is 25°C, and the stirring lasts for 10 minutes, and then it is coated on the surface of the power transmission line to form an optical super-structured coating with a thickness of 300 μm after room temperature curing.

[0198] The comparative example also provides a high-voltage temperature-reducing power transmission line. The coating solution is mixed with 90 g of curing agent KS201 (n-butyl alcohol) by stirring according to the method in Comparative Example 3. The stirring tool is a magnetic stirrer, the stirring speed is 800 r / min, the environmental temperature is 25 °C, the stirring lasts for 10 minutes, the coating is applied to the surface of the power transmission line, and an optical superstructure coating with a thickness of 300 μm is formed after room temperature curing. Then, a 100 μm anticorrosive coating is applied to the surface of the optical superstructure coating to obtain an anticorrosive coating.

[0199] Table 1: Reflectivity and temperature-reducing performance of the power transmission lines in Examples 1-8 and Comparative Examples 1-3

[0200]

[0201]

[0202]

[0203] Specifically, in Table 1, the acid resistance is in 5% sulfuric acid for 168 hours, referring to HG / T 4341-2012; the alkali resistance is in a saturated NaOH solution for 48 hours, referring to GB / T 9755-2014; and the ultraviolet resistance is in 1000 W sunlight spectrum band irradiation (including 60 W 300-400 nm ultraviolet band irradiation), referring to GB / T 9755-2014.

[0204] As can be seen from Table 1, the average mid-infrared emissivity and the solar radiation weighted reflectivity of Examples 1-8 are better than those of Comparative Examples 1, 2 and 3. The solar radiation weighted reflectivity of Example 3 is the highest. Based on the average mid-infrared emissivity of Examples 1-8, the passive cooling effect of Example 3 is the best. Although Comparative Examples 1 and 2 have good average mid-infrared emissivity, their solar radiation weighted reflectivity is low, which is insufficient to block the photothermal effect of solar radiation on the high-voltage power transmission line, and it is difficult to achieve outdoor zero-energy-consumption efficient cooling of the high-voltage power transmission line. The better the acid resistance and alkali resistance, the less abnormality in the acid resistance and alkali resistance tests. Since the parameters of the micro-nano medium of the examples and the comparative examples are different, the rest of the process and design are prepared according to the claims of the patent, and therefore the acid resistance and alkali resistance of the examples and the comparative examples are excellent. The ultraviolet resistance indicates whether the surface morphology of the coating changes due to long-term ultraviolet radiation during the ultraviolet aging test. The ultraviolet resistance of Examples 1-8 is much better than that of Comparative Examples 1, 2 and 3, i.e., they all have excellent ultraviolet resistance. In summary, compared with Comparative Examples 1-3, Examples 1-8 have excellent solar reflectivity, mid-infrared thermal emissivity, acid resistance, alkali resistance, ultraviolet resistance, etc. Among them, Example 3 is the best example.

[0205] Figure 2is a cross-sectional morphology SEM image of the optical super-structured coating of one embodiment 3 of the present application;

[0206] Figure 3 is a real object image of the high-voltage power transmission line before and after coating with the optical super-structured coating of one embodiment 3 of the present application, wherein (a) is before coating, and (b) is after coating.

[0207] Figure 4 is a scattering efficiency diagram of the high-scattering characteristic value micro-nano medium titanium dioxide particles mentioned in all embodiments of the present application in the solar radiation waveband (0.3-2.5 μm). As can be seen from the diagram, the micro-nano medium with a diameter between 200 nm and 400 nm has the highest scattering efficiency, and can play a significant and precise regulation function on the entire solar spectrum. Although the micro-nano medium with other particle sizes does not have the scattering efficiency as high as the micro-nano medium with a particle size in the range of 200-400 nm, it still has a good regulation function on the solar spectrum. In addition, it can be seen that the micro-nano medium with a particle size of 20 nm has a scattering efficiency close to 0 in the solar waveband, and does not have the function of regulating the solar spectrum.

[0208] Figure 5 is a high-voltage power transmission line after coating according to embodiment 3, embodiment 5, and embodiment 6 of the present application, and an untreated high-voltage power transmission line (i.e. Figure 5 is a comparison diagram of temperature data of the environment and the high-voltage power transmission line. In a sunny and less cloudy outdoor high-temperature environment, the untreated high-voltage power transmission line, embodiment 5, embodiment 6, and the optimal embodiment 3 high-voltage power transmission line were tested for 24 hours. The temperature difference was the largest at about 13:00, and the temperature of the high-voltage power transmission line of embodiment 3 was 17.7℃ lower than that of the untreated high-voltage power transmission line, and was close to the temperature of the environment, achieving excellent passive cooling effect.

[0209] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as within the scope of the present application.

[0210] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. An optical superstructure coating for temperature reduction of high voltage power lines, characterized in that, The optical super-structure coating comprises at least one micro-nano medium with high scattering characteristic value and at least one functional high polymer material medium with high emission characteristic value; The scattering efficiency S of the micro-nano medium with the high scattering characteristic value ca The scattering efficiency S of the micro-nano medium with the high scattering characteristic value is obtained by the ratio of the scattering cross section to the geometric cross section ca =B / A; The geometric cross section refers to a two-dimensional cross-sectional area A passing through the center of the high-scattering characteristic value micro-nano medium, which is obtained by multiplying the square of the center radius r of the micro-nano medium by π, A=r 2 π; The scattering cross section B is the energy power P of the electromagnetic wave scattered by the micro-nano medium per unit time sa The energy I of the incident electromagnetic wave at infinity inc The ratio determines the scattering interface B = P sa / I inc ; The micro-nano medium with the high scattering characteristic value has a scattering efficiency S in the range of 0.2-2.5 μm of the solar radiation wave band ca is 0.1-20; The particle size of the micro-nano medium with high scattering characteristic value obeys Gaussian distribution, and the mean value is 5 nm to 5 μm; The volume fraction of the micro-nano medium with high scattering characteristic value in the optical super-structure coating is 5% to 85%; The spectral absorption peak characteristic value of the high polymer material with high emission characteristic value is 4 μm to 50 μm.

2. The optical super-construction coating for temperature reduction of high voltage power transmission lines of claim 1, wherein, The material used by the micro-nano medium with high scattering characteristic value comprises at least one of titanium dioxide, silicon dioxide, zinc oxide, silicon carbide, silicon nitride, zinc sulfide, aluminum oxide, iron oxide, boron nitride, magnesium oxide, barium sulfate, barium carbonate and aluminum silicate; And / or, the functional high polymer material medium comprises at least one of phenolic resin, polyamide resin, polyvinylidene fluoride, fluorine olefin-vinyl ether copolymer, amino resin, alkyd resin, water-based fluorocarbon emulsion resin, furan resin, polyester resin, vinyl resin, acrylic resin and epoxy resin; And / or, the thickness of the optical super-structure coating is 15 to 1000 μm.

3. A method for preparing the optical super-construction coating for temperature reduction of high-voltage transmission lines according to any one of claims 1-2, characterized in that, The method comprises the following steps: Mixing the functional high polymer material medium with high emission characteristic value and a diluent to obtain a polymer solution; Mixing the micro-nano medium with high scattering characteristic value, a dispersant and the polymer solution to obtain a coating solution; Mixing the coating solution with a curing agent, and coating on a substrate, and after curing, an optical super-structure coating is obtained.

4. The method for preparing optical super-construction coating for temperature reduction of high-voltage transmission lines according to claim 3, characterized in that, The mass ratio of the functional high polymer material medium with high emission characteristic value, the diluent, the micro-nano medium with high scattering characteristic value, the dispersant and the curing agent is (180~200):(25~30):(43.7~276.92):(2.19~13.85):(90~100)； The diluent comprises at least one of nitro paint diluent, perchloroethylene paint diluent, phenolic paint diluent, acrylic paint diluent, alkyd paint diluent, epoxy paint diluent, phenolic paint diluent, silicone paint diluent and methyl ethyl ketone; The dispersant comprises at least one of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, cetyl trimethyl ammonium bromide, polyoxyethylene stearate, polyvinyl alcohol, sodium polyacrylate, polyacrylamide, polyphosphate, colloidal silica and hydroxyethyl cellulose; The curing agent comprises at least one of aromatic polyamine, imidazole, acid anhydride, polyisocyanate curing agent, nitrogen-containing phenolic resin, aryl ether ester diarylamine, acid anhydride curing agent, polyether amine curing agent, thiol amine epoxy curing agent, trimellitic anhydride, m-phenylenediamine curing agent, methyl tetrahydrophthalic anhydride, dicyandiamide and ethyl n-butyl ester.

5. The optical super-structure coating for high-voltage transmission line cooling according to any one of claims 1 to 2 is applied to the preparation of high-voltage cooling transmission line.

6. A high voltage, low temperature power transmission line, characterized by The transmission line body and the coating on the transmission line body, wherein the coating is the optical super-structure coating for high-voltage transmission line cooling according to any one of claims 1 to 2.

7. The high voltage power transmission line of claim 6, wherein the at least one electrically conductive layer is a layer of aluminum. Further comprising an anticorrosive coating, wherein the anticorrosive coating is located on the surface of the optical super-structure coating.

Images