Environment-friendly cooling and radiation-proof refrigeration coating and preparation method thereof

Abstract

The invention discloses an environment-friendly cooling anti-radiation refrigeration coating and a preparation method thereof, and belongs to the technical field of coating preparation. The raw materials are prepared from core materials, auxiliary materials and ingredients. The core material is prepared from a main raw material, hollow glass beads and environment-friendly resin, the auxiliary material is prepared from a nano additive and mineral pigment, and the ingredients are prepared from ferroferric oxide, nano titanium dioxide, diopside and polyvinylidene fluoride. The main raw materials comprise carbon quantum dots, carbon nanofibers, carbon nanospheres and graphene quantum dots; the environment-friendly resin base material is prepared from waterborne polyurethane resin, rosin resin, shellac resin and polytetrafluoroethylene; the nano additive is composed of silicon carbide, carbon black, carbon fibers, magnesium borate and carbon nanotubes. According to the coating, solar energy can be converted into light energy, the sunlight reflectivity of the coating is improved through the unique optical property of the coating, the sunlight reflectivity of the coating can be correspondingly improved along with increase of the sunlight intensity, and therefore the situation that a building absorbs excessive heat is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of coating preparation, and in particular relates to an environmentally friendly cooling and radiation-proof refrigeration coating and a preparation method thereof. Background Art

[0002] Since entering the modern society, human activities have had an increasingly greater impact on the natural environment. The popularization of modern technologies such as cars and air conditioners has also accelerated global warming, with living temperatures becoming increasingly higher, the urban heat island effect becoming increasingly serious, and energy consumption in buildings increasing significantly.

[0003] In order to meet this challenge, it is particularly important to develop an anti-radiation cooling material that is both environmentally friendly and efficient. At present, relevant entities on the market have developed anti-radiation cooling materials, but the selected materials have the disadvantages of poor effect, lack of durability, and easy damage to the environment.

[0004] The present invention aims to provide an environmentally friendly nano-coating material based on photoluminescent radiation cooling technology, which can significantly reduce the surface and indoor temperature of buildings without consuming any energy, while reducing energy consumption. Summary of the invention

[0005] In view of this, an object of the present invention is to provide an environmentally friendly cooling and radiation-proof refrigeration coating and a preparation method to solve the above problems.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The invention provides an environment-friendly cooling and radiation-proof refrigeration coating, wherein the coating is made of a core material, an auxiliary material and ingredients; the core material is composed of a main raw material, hollow glass microbeads and an environment-friendly resin; the auxiliary material is composed of a nano-additive and a mineral pigment; the ingredients are made of ferroferric oxide, nano-titanium dioxide, diopside and polyvinylidene fluoride; the main raw material is composed of carbon quantum dots, carbon nanofibers, nano-carbon balls and graphene quantum dots; the environment-friendly resin base material is composed of water-based polyurethane resin, rosin resin, shellac resin and polytetrafluoroethylene; the nano-additive is composed of silicon carbide, carbon black, carbon fiber, magnesium borate and carbon nanotubes.

[0008] Furthermore, the main raw material is 80-100 parts, the hollow glass microspheres are 50-80 parts, and the environmentally friendly resin is 40-60 parts; the nano additives are 30-45 parts, and the mineral pigments are 15-25 parts; the ferrosoferric oxide is 8-12 parts, the nano titanium dioxide is 20-35 parts, the diopside is 10-15 parts, and the polyvinylidene fluoride is 10-15 parts.

[0009] Furthermore, the mass ratio of the carbon quantum dots, carbon nanofibers, nanocarbon balls, and graphene quantum dots is 25-30: 15-20: 15-20: 25-30; the mass ratio of the water-based polyurethane resin, rosin resin, shellac resin, and polytetrafluoroethylene is 10-15: 10-15: 10-15: 10-15; the mass ratio of silicon carbide, carbon black, carbon fiber, magnesium borate, and carbon nanotubes is 5-7.5: 5-7.5: 5-7.5: 5-7.5: 5-7.5: 5-7.5.

[0010] Furthermore, the mineral pigments are ochre, ocher, realgar, realgar, coral, mica, crystal, and silver beads that need to be selected according to color.

[0011] Furthermore, the main raw material is 90 parts, the hollow glass microspheres are 62 parts, and the environmentally friendly resin is 50 parts; the nano additives are 38 parts, and the mineral pigments are 18 parts; the ferrosoferric oxide is 10 parts, the nano titanium dioxide is 27 parts, the diopside is 12 parts, and the polyvinylidene fluoride is 12 parts.

[0012] Furthermore, a method for preparing an environmentally friendly cooling and radiation-proof refrigeration coating is characterized in that it comprises the following preparation steps:

[0013] S1, reacting graphene quantum dots with ferroferric oxide to obtain a composite; then evenly dispersing carbon quantum dots, carbon nanofibers, and nanocarbon balls in an environmentally friendly resin base material, and then adding the composite to form a first solution;

[0014] S2, adding 1 / 2 of the nano additive to the first solution, and continuing to stir evenly to form a second solution;

[0015] S3, according to the coating color requirements, continue to add mineral pigments to the second solution, stir evenly, and then continue to add the remaining 1 / 2 nano additives to form a third solution;

[0016] S4, plating a nano titanium dioxide layer on the surface of the glass microbeads, and then evenly coating the third solution on the surface of the nano titanium dioxide layer, and then adding diopside and polyvinylidene fluoride particles, stirring evenly to form a cooling and radiation-proof refrigeration coating;

[0017] S5. Apply the cooling and radiation-proof refrigeration coating on the surface of the substrate and allow it to dry naturally.

[0018] Furthermore, the particle size of the nano titanium dioxide is 0.2-0.4 μm.

[0019] Furthermore, in the step S4, ammonium fluorotitanate and dodecanol glycidyl ether are used as a buffer and a crystal formation destroyer when plating the titanium dioxide layer.

[0020] Furthermore, the diopside and polyvinylidene fluoride are in granular form with a particle size of 0.2-0.4 μm.

[0021] Furthermore, after the preparation in step S3 is completed, the third solution is allowed to stand for 1-3 hours.

[0022] The beneficial effects of the present invention are:

[0023] 1. The main raw materials of the present invention are mainly carbon quantum dots, carbon nanofibers, nanocarbon balls, and graphene quantum dots, which can convert solar energy into light energy and improve the solar reflectivity of the coating through its unique optical properties. As the solar luminosity intensity increases, the solar reflectivity of the coating will also increase accordingly, thereby preventing the building from absorbing excessive heat. The synergistic effect of the nano additives and ingredients of the present invention and the main raw materials further enhances the optical properties of the coating; the hollow glass microspheres used can more effectively convert ultraviolet rays into visible light photons and improve the overall reflectivity of the coating. The mutual combination of materials can obtain materials with excellent cooling and radiation protection properties, which have broad application prospects in energy saving and cooling of buildings, mitigation of urban heat island effects, etc.

[0024] 2. The present invention first reacts graphene quantum dots with ferroferric oxide to obtain a composite, which is then reacted with the remaining main materials and environmentally friendly resins to make the prepared material have cooling and radiation protection properties. The environmentally friendly resin of the present invention has a high softening point, high viscosity and good oxidation resistance, a low organic solvent content, reduces the emission of volatile organic compounds, and has less pollution to the environment. In addition, the environmentally friendly resin strengthens the bonding performance of the coating, so that the coating has excellent bonding ability.

[0025] 3. The coating prepared by the present invention is made of environmentally friendly and harmless organic materials to ensure that it will not cause pollution to the environment during use. The material is water-soluble and only needs to wait for the water to evaporate before forming a coating covering the surface of the building.

[0026] 4. The mineral pigment of the present invention is selected from ochre, ocher, realgar, realgar, coral, mica, crystal, vermilion, etc. The raw materials are widely available and non-toxic and harmless.

[0027] 5. In the preparation of the present invention, a nano titanium dioxide layer is plated on the surface of the glass microspheres by liquid phase deposition, which greatly improves the reflectivity of the glass microspheres. Then, the water resistance and wear resistance of the coating are further improved by the combined use of diopside and polyvinylidene fluoride particles. In this way, the hollow glass microspheres can not only reflect sunlight and reduce the absorption of heat, but also release heat into space through the principle of radiation cooling to achieve a smart cooling effect. The method of the present invention does not require the use of electricity, which helps to reduce the use of air conditioners, respond to climate change, and reduce energy consumption and carbon emissions.

[0028] 6. The environmentally friendly radiation-resistant cooling material of the present invention achieves the goal of significantly reducing the temperature of buildings without consuming energy through photoluminescent radiation cooling technology. The material has the advantages of being non-toxic, durable, and environmentally friendly, and is one of the important innovative strategies for achieving sustainable urban development and alleviating the urban heat island effect in the future.

[0029] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to make the purpose, technical solution and beneficial effects of the invention clearer, the present invention provides the following drawings for illustration:

[0031] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0032] The invention provides an environmentally friendly cooling and radiation-proof refrigeration coating and a preparation method thereof.

[0033] Example 1

[0034] S1. First, react graphene quantum dots with 8 parts of ferroferric oxide to obtain a composite; then, evenly disperse 80 parts of the main raw material in 40 parts of an environmentally friendly resin base material to form a first solution;

[0035] S2, adding 15 parts of nano additives to the first solution, stirring evenly for 60 minutes to form a second solution;

[0036] S3, according to the coating color requirements, continue to add 15 parts of mineral pigment to the second solution, stir evenly, and then continue to add the remaining 15 parts of nano additives to form a third solution;

[0037] S4, coating 20 parts of nano titanium dioxide on the surface of 50 parts of glass microspheres by liquid phase deposition, and then evenly coating the third solution on the surface of the nano titanium dioxide layer, and then adding 10 parts of diopside and 10 parts of polyvinylidene fluoride particles, stirring evenly to form a cooling and radiation-proof refrigeration coating;

[0038] S5. Apply the cooling and radiation-proof refrigeration coating on the surface of the substrate and allow it to dry naturally.

[0039] In this embodiment, the main raw materials are composed of carbon quantum dots, carbon nanofibers, nano-carbon balls, and graphene quantum dots in a mass ratio of 25:20:15:25; the environmentally friendly resin is composed of water-based polyurethane resin, rosin resin, shellac resin, and polytetrafluoroethylene in a mass ratio of 10:15:15:10; the nano-additives are composed of silicon carbide, carbon black, carbon fiber, magnesium borate, and carbon nanotubes in a mass ratio of 5:5:5:5:5:5.

[0040] Example 2

[0041] S1. First, react graphene quantum dots with 12 parts of ferroferric oxide to obtain a composite; then, evenly disperse 100 parts of the main raw material in 60 parts of an environmentally friendly resin base material to form a first solution;

[0042] S2, adding 22.5 parts of nano additives to the first solution, stirring evenly for 60 minutes to form a second solution;

[0043] S3, according to the coating color requirements, continue to add 25 parts of mineral pigment to the second solution, stir evenly, and then continue to add the remaining 22.5 parts of nano additives to form a third solution;

[0044] S4, coating 35 parts of nano titanium dioxide on the surface of 80 parts of glass microspheres by liquid phase deposition method, and then evenly coating the third solution on the surface of the nano titanium dioxide layer, and then adding 15 parts of diopside and 15 parts of polyvinylidene fluoride particles, stirring evenly to form a cooling and radiation-proof refrigeration coating;

[0045] S5. Apply the cooling and radiation-proof refrigeration coating on the surface of the substrate and allow it to dry naturally.

[0046] In this embodiment, the main raw materials are composed of carbon quantum dots, carbon nanofibers, nanocarbon balls, and graphene quantum dots in a mass ratio of 30:20:20:30; the environmentally friendly resin is composed of water-based polyurethane resin, rosin resin, shellac resin, and polytetrafluoroethylene in a mass ratio of 15:15:15:15; the nano additives are composed of silicon carbide, carbon black, carbon fiber, magnesium borate, and carbon nanotubes in a mass ratio of 7.5:7.5:7.5:7.5:7.5.

[0047] Example 3

[0048] S1. First, react graphene quantum dots with 10 parts of ferroferric oxide to obtain a composite; then, evenly disperse 90 parts of the main raw material in 50 parts of an environmentally friendly resin base material to form a first solution;

[0049] S2, adding 20 parts of nano additives to the first solution, stirring evenly for 60 minutes to form a second solution;

[0050] S3, according to the coating color requirements, continue to add 25 parts of mineral pigment to the second solution, stir evenly, and then continue to add the remaining 19 parts of nano additives to form a third solution;

[0051] S4, coating 27 parts of nano titanium dioxide on the surface of 65 parts of glass microspheres by liquid phase deposition, and then uniformly coating the third solution on the surface of the nano titanium dioxide layer, and then adding 12.5 parts of diopside and 12.5 parts of polyvinylidene fluoride particles, stirring evenly to form a cooling and radiation-proof refrigeration coating;

[0052] S5. Apply the cooling and radiation-proof refrigeration coating on the surface of the substrate and allow it to dry naturally.

[0053] In this embodiment, the main raw materials are composed of carbon quantum dots, carbon nanofibers, nanocarbon balls, and graphene quantum dots in a mass ratio of 27:18:17:28; the environmentally friendly resin is composed of water-based polyurethane resin, rosin resin, shellac resin, and polytetrafluoroethylene in a mass ratio of 12.5:12.5:12.5:12.5; the nano additives are composed of silicon carbide, carbon black, carbon fiber, magnesium borate, and carbon nanotubes in a mass ratio of 6.5:6.5:6.5:6.5:6.5:6.5.

[0054] In order to verify the superiority of the materials, proportions and methods of the present invention, comparative examples 1-3 are set here.

[0055] Comparative Example 1

[0056] S1. First, react graphene quantum dots with 25 parts of ferroferric oxide to obtain a composite; then, evenly disperse 60 parts of the main raw material in 70 parts of an environmentally friendly resin base material to form a first solution;

[0057] S2, adding 10 parts of nano additives to the first solution, stirring evenly for 60 minutes to form a second solution;

[0058] S3, according to the coating color requirements, continue to add 25 parts of mineral pigment to the second solution, stir evenly, and then continue to add the remaining 5 parts of nano additives to form a third solution;

[0059] S4, coating 5 parts of nano titanium dioxide on the surface of 30 parts of glass microspheres by liquid phase deposition method, and then evenly coating the third solution on the surface of the nano titanium dioxide layer, and then adding 20 parts of diopside and 20 parts of polyvinylidene fluoride particles, stirring evenly to form a coating;

[0060] S5. Apply the coating to the surface of the substrate and allow to dry naturally.

[0061] In this comparative example, the ratio of the coating used is not within the scope of the present invention, and the prepared coating has average radiation protection performance and temperature reduction performance, high viscosity, and cannot be effectively adapted to industrial applications.

[0062] Comparative Example 2

[0063] S1, adding 20 parts of nano additives to 90 parts of the main raw material, and then adding deionized water and stirring evenly for 60 minutes to form a first solution;

[0064] S3, according to the coating color requirements, continue to add 25 parts of mineral pigment to the first solution to form a second solution;

[0065] S4, coating 27 parts of nano titanium dioxide on the surface of 65 parts of glass microspheres by liquid phase deposition method, and then evenly coating the second solution on the surface of the nano titanium dioxide layer, stirring evenly to form a coating;

[0066] S5. Apply the coating to the surface of the substrate and allow to dry naturally.

[0067] In this comparative example, the coating was replaced or missing during the preparation of the coating, and the prepared coating had poor radiation protection performance, cooling performance, and viscosity, and had almost no cooling and radiation protection performance, and could not be effectively adapted to industrial applications.

[0068] Comparative Example 3

[0069] S1, 90 parts of main raw materials, 50 parts of environmentally friendly resin, 65 parts of glass beads, 37 parts of nano additives, 25 parts of mineral pigments, 10 parts of ferroferric oxide, 27 parts of nano titanium dioxide, 12.5 parts of diopside, and 12.5 parts of polyvinylidene fluoride particles are uniformly stirred to form a coating;

[0070] S2. Apply the coating to the surface of the substrate and allow to dry naturally.

[0071] In this comparative example, the coating was not prepared according to the steps, and all the raw materials were directly added at once without giving the corresponding raw materials sufficient reaction time. The obtained coating had average cooling and radiation protection properties and could not be effectively adapted to industrial applications.

[0072] Performance Test:

[0073] The coatings of Examples 1 to 3 and Comparative Examples 1 to 4 were placed in the same environment and tested for performance such as solar reflectivity, thermal infrared emissivity, and durability. The results are shown in Table 1:

[0074]

[0075]

[0076] The above tests show that the raw materials, proportions, and methods used in the coating materials of Examples 1 to 3 of the present invention are all within the scope of the present invention. The prepared coatings have excellent cooling, refrigeration, and radiation protection effects, and are applied to surfaces such as rooftops and exterior walls of buildings, which can significantly reflect the cooling effect; and can be made into a variety of colors as needed, and applied in a large amount by rolling brushes on rooftops and exterior walls of buildings, roads, urban surface coverage, etc., which not only achieves the purpose of cooling, but also has the effect of beautifying the appearance; at the same time, the raw materials of the present invention are non-toxic and durable, and do not contain any metal, which helps to promote the use of environmentally friendly and energy-saving methods to alleviate the urban heat island effect and achieve the goal of carbon neutrality.

[0077] However, the coatings prepared in Comparative Examples 1 to 3 do not adopt the ratio, raw materials and method of the present invention, so the coatings have poor performance in all aspects, are not helpful for actual use, and cannot be effectively applied in industrial environments.

[0078] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An environmentally friendly cooling and radiation-proof refrigeration coating, characterized in that: The coating is made of core materials, auxiliary materials and ingredients; the core material is composed of main raw materials, hollow glass microbeads and environmentally friendly resins; the auxiliary materials are composed of nano-additives and mineral pigments; the ingredients are made of ferroferric oxide, nano-titanium dioxide, diopside and polyvinylidene fluoride; the main raw materials are composed of carbon quantum dots, carbon nanofibers, nano-carbon balls and graphene quantum dots; the environmentally friendly resin base material is composed of water-based polyurethane resin, rosin resin, shellac resin and polytetrafluoroethylene; the nano-additives are composed of silicon carbide, carbon black, carbon fiber, magnesium borate and carbon nanotubes.

2. The environmentally friendly cooling and radiation-proof refrigeration coating according to claim 1, characterized in that: The main raw material is 80-100 parts, the hollow glass microspheres are 50-80 parts, and the environmentally friendly resin is 40-60 parts; the nano additives are 30-45 parts, and the mineral pigments are 15-25 parts; the ferrosoferric oxide is 8-12 parts, the nano titanium dioxide is 20-35 parts, the diopside is 10-15 parts, and the polyvinylidene fluoride is 10-15 parts.

3. The environmentally friendly cooling and radiation-proof refrigeration coating according to claim 1, characterized in that: The mass ratio of the carbon quantum dots, carbon nanofibers, nanocarbon balls, and graphene quantum dots is 25-30: 15-20: 15-20: 25-30; the mass ratio of the waterborne polyurethane resin, rosin resin, shellac resin, and polytetrafluoroethylene is 10-15: 10-15: 10-15: 10-15; the mass ratio of silicon carbide, carbon black, carbon fiber, magnesium borate, and carbon nanotubes is 5-7.5: 5-7.5: 5-7.5: 5-7.5: 5-7.5: 5-7.

5.

4. The environmentally friendly cooling and radiation-proof refrigeration coating according to claim 1, characterized in that: The mineral pigments are ochre, ocher, realgar, realgar, coral, mica, crystal, and silver beads that need to be selected according to color.

5. The environmentally friendly cooling and radiation-proof refrigeration coating according to claim 1, characterized in that: The main raw material is 90 parts, the hollow glass microspheres are 62 parts, and the environmentally friendly resin is 50 parts; the nano additives are 38 parts, and the mineral pigments are 18 parts; the ferrosoferric oxide is 10 parts, the nano titanium dioxide is 27 parts, the diopside is 12 parts, and the polyvinylidene fluoride is 12 parts.

6. The environmentally friendly cooling and radiation-proof refrigeration coating according to any one of claims 1 to 4, further comprising a method for preparing the environmentally friendly cooling and radiation-proof refrigeration coating, characterized in that: The method comprises the following preparation steps: S1, reacting graphene quantum dots with ferroferric oxide to obtain a composite; then evenly dispersing carbon quantum dots, carbon nanofibers, and nanocarbon balls in an environmentally friendly resin base material, and then adding the composite to form a first solution; S2, adding 1 / 2 of the nano additive to the first solution, and continuing to stir evenly to form a second solution; S3, according to the coating color requirements, continue to add mineral pigments to the second solution, stir evenly, and then continue to add the remaining 1 / 2 nano additives to form a third solution; S4, plating a nano titanium dioxide layer on the surface of the glass microbeads, and then evenly coating the third solution on the surface of the nano titanium dioxide layer, and then adding diopside and polyvinylidene fluoride particles, stirring evenly to form a cooling and radiation-proof refrigeration coating; S5. Apply the cooling and radiation-proof refrigeration coating on the surface of the substrate and allow it to dry naturally.

7. The method for preparing an environmentally friendly cooling and radiation-proof refrigeration coating according to claim 1, characterized in that: The particle size of the nano titanium dioxide is 0.2-0.4 μm.

8. The method for preparing an environmentally friendly cooling and radiation-proof refrigeration coating according to claim 1, characterized in that: In the step S4, ammonium fluorotitanate and dodecanol glycidyl ether are used as a buffer and a crystal formation destroyer when plating the titanium dioxide layer.

9. The method for preparing an environmentally friendly cooling and radiation-proof refrigeration coating according to claim 1, characterized in that: The diopside and polyvinylidene fluoride are in granular form with a particle size of 0.2-0.4 μm.

10. The method for preparing an environmentally friendly cooling and radiation-proof refrigeration coating according to claim 1, characterized in that: After the preparation of step S3 is completed, the third solution is allowed to stand for 1-3 hours.

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