Heat-preservation heat-insulation coating energy-saving material and preparation method and application thereof

Abstract

The invention belongs to the technical field of energy-saving materials, and discloses a thermal insulation coating energy-saving material, which is prepared from the following raw materials in parts by weight: 90 to 120 parts of waterborne resin, 10 to 25 parts of modified nano cesium tungsten bronze material, 5 to 20 parts of modified nano silicon dioxide, 1 to 10 parts of light stabilizer, 0.1 to 1 part of coupling agent, 0.5 to 3 parts of flatting agent, 5 to 10 parts of wetting dispersant and 0.05 to 0.1 part of defoaming agent. According to the heat-preservation heat-insulation coating energy-saving material disclosed by the invention, the water-based resin is used as a main film-forming material, the modified nano cesium tungsten bronze and the modified nano silicon dioxide are used as nano functional materials, and the light stabilizer is used as an auxiliary material; by utilizing the excellent visible light transmittance and near-infrared light shielding performance of the modified nano-scale cesium tungsten bronze and the high transmittance and infrared barrier performance of the modified nano-silica, the glass can ensure that the visible light transmittance of the glass is 76% or above, meanwhile, 97% or above of infrared light and ultraviolet light are isolated, and the glass has excellent heat insulation and cooling effects.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy-saving materials, and in particular relates to a thermal insulation coating energy-saving material and a preparation method and application thereof. Background Art

[0002] In recent years, global climate change has become increasingly serious, and achieving carbon peak and carbon neutrality have become topics of common concern worldwide. The construction industry is one of the world's largest energy consumers, consuming approximately 40% of global energy annually and contributing over 50% of carbon emissions. Over 90% of this energy consumption comes from household appliances such as air conditioners, electric fans, and floor heating. Addressing the issue of high building energy consumption requires targeted insulation and heat preservation measures. Furthermore, with the rise of high-rise buildings, large glass windows and curtain walls are being used for aesthetics and improved lighting. However, traditional glass cannot provide thermal insulation. Reducing the energy loss caused by glass use to curb the energy crisis has become a hot topic of research.

[0003] According to research, ordinary glass has good light transmittance, but cannot reflect or absorb infrared and ultraviolet rays. The energy in the near-infrared region accounts for 50% of the total solar radiation energy, the energy in the visible light region accounts for 45%, and the energy in the ultraviolet region accounts for 5%. Since ultraviolet light and near-infrared light are invisible light, they will not affect indoor photosensitivity, but their energy will be radiated from the glass to objects in the form of radiation. Therefore, it is necessary to develop thermal insulation materials that can absorb or reflect infrared and ultraviolet rays.

[0004] Currently, existing thermal insulation technologies include thermal insulation coatings and thermal insulation films. Thermal insulation films are applied to glass or directly to Low-E coated glass. However, these films require glue and have a short service life. Low-E coated glass has a low transmittance and is expensive, making it difficult to implement on a large scale. Thermal insulation coatings are made by evenly dispersing nanofunctional materials with near-infrared blocking capabilities into the coating. Applying these coatings to the glass surface imparts high selective transmittance. Currently, the nanofunctional materials used in thermal insulation coatings are primarily oxide semiconductors, such as indium tin oxide (ITO), antimony tin oxide (ANTO), aluminum-doped zinc oxide (Al-doped ZnO), and cesium tungsten bronze (CsT). However, the raw materials for ITO are relatively expensive and toxic. While antimony tin oxide and aluminum-doped ZnO do not present these issues, they are ineffective in blocking near-infrared light in the 780-2400nm wavelength range, which concentrates 75% of the sun's near-infrared energy. As a new thermal management material, CsT exhibits excellent heat reflection and heat dissipation properties, but it still suffers from technical drawbacks such as poor slurry dispersion stability, insufficient aging resistance, and insufficient weathering resistance. Summary of the Invention

[0005] The purpose of the present invention is to solve the above technical problems and provide a thermal insulation coating energy-saving material that can isolate more than 99% of infrared light and ultraviolet light while ensuring a high visible light transmittance of more than 76% for glass, and has excellent thermal insulation and cooling effects and self-cleaning functions.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A thermal insulation coating energy-saving material comprises the following raw materials in parts by weight: 90-120 parts of a water-based resin, 10-25 parts of a modified nano-cesium tungsten bronze material, 5-20 parts of modified nano-silicon dioxide, 1-10 parts of a light stabilizer, 0.1-1 parts of a coupling agent, 0.5-3 parts of a leveling agent, 5-10 parts of a wetting and dispersing agent, and 0.05-0.1 parts of a defoaming agent.

[0008] Preferably, the water-based resin is selected from one or more of acrylic resin, polyurethane resin and epoxy resin.

[0009] Preferably, the modified nano-cesium tungsten bronze slurry is prepared by the following method:

[0010] S1. Dissolve tungsten hexachloride and cesium hydroxide in acetic acid and polyethylene glycol solvents and stir magnetically to obtain a mixed liquid;

[0011] S2. The mixed liquid was added to a hydrothermal reactor and subjected to a hydrothermal reaction at 220°C-240°C for 24h-26h to obtain a reaction product; the reaction product was centrifuged, and the centrifuged material was dried to obtain nano-cesium tungsten bronze particles having a particle size of 5-10nm;

[0012] S3. Take the above-mentioned nano-cesium tungsten bronze particles and add ethanol to prepare a dispersion, add γ-methacryloxypropyltrimethoxysilane and triethylamine, and heat to 70-80°C in an oil bath under nitrogen protection. Stir and react for 24 hours, then use anhydrous ethanol to centrifuge and wash 2-4 times, and then dry at 50-70°C for 4-6 hours to obtain a hydrophobic surface-modified nano-cesium tungsten bronze material.

[0013] Preferably, the modified nano-silica is prepared by the following method:

[0014] S1. The aminopropyl triethoxysilane and perfluorodecyl triethoxysilane compounds were mixed, anhydrous ethanol and silica were added, the reaction was stirred hydrothermally, and the pretreated material was obtained by centrifugation;

[0015] S2. reacting the pretreated product with polymethyl methacrylate in a solvent, and centrifugally drying the resultant to obtain hydrophobically modified nano-silica.

[0016] Preferably, the wetting and dispersing agent is composed of a polymer polyelectrolyte, a nonionic surfactant, and an organosilane coupling agent in a mass ratio of 4:4:2. The wetting and dispersing agent is a multifunctional composite dispersant system that combines multiple mechanisms of electrostatic repulsion, steric hindrance, and surface modification. The polymer polyelectrolyte provides a strong electrostatic repulsion to prevent particle aggregation; the nonionic surfactant forms a stable steric hindrance layer to further prevent the particles from approaching; the organosilane coupling agent hydrophobically modifies the surface of the nano-cesium tungsten bronze particles to enhance compatibility with the matrix. Through the combination of the above three mechanisms, not only can the dispersion stability be significantly improved, but the compatibility with the matrix can also be enhanced through surface modification, and the aging resistance and weather resistance can be improved.

[0017] Preferably, the polymer polyelectrolyte includes one or more of sodium polyacrylate, sodium polymethacrylate, and sodium polyphosphate; the nonionic surfactant includes a polyethylene glycol derivative; and the organosilane coupling agent includes one or both of γ-aminopropyltriethoxysilane and γ-methacryloxypropyltrimethoxysilane.

[0018] Preferably, the light stabilizer comprises a hindered amine light stabilizer and a benzotriazole UV absorber in a mass ratio of 1:1. The addition of the light stabilizer can effectively extend the life of the waterborne resin material, inhibit photooxidation reactions, prolong photoaging time, prevent surface cracking and aging, maintain gloss, and improve the yellowing resistance of the two-component polyurethane.

[0019] Preferably, the leveling agent comprises at least one of acrylic, silicone, and fluorocarbon compounds, preferably organic modified polysiloxane. The addition of the leveling agent can reduce the surface tension of the product, enhance its wettability to the substrate (glass), and improve leveling properties.

[0020] Preferably, the coupling agent includes one or more of a silane coupling agent, a titanate coupling agent, and an organic carboxylic acid coupling agent.

[0021] Preferably, the defoaming agent is one or a combination of polyether siloxane copolymer and mineral oil defoaming agent.

[0022] Another object of the present invention is to provide a method for preparing a thermal insulation coating energy-saving material, comprising the following steps: sequentially adding a water-based resin, a modified nano-cesium tungsten bronze material, nano-modified silica, a light stabilizer, a coupling agent, and deionized water into a dispersion tank, uniformly dispersing the mixture at a certain speed for a period of time to obtain a dispersion; placing the dispersion in a high-speed oscillating grinder, grinding the dispersion, and then extracting the dispersion, placing it in a dispersion tank, adding a leveling agent, a wetting dispersant, and a defoaming agent into the dispersion tank, and continuing to disperse the mixture at a speed of 600-800 rpm to obtain the thermal insulation coating energy-saving material.

[0023] The present invention also provides an application of a thermal insulation coating energy-saving material on glass, wherein the thermal insulation coating energy-saving material is used to coat the glass. The coating treatment includes cleaning and drying the glass in sequence, and then spraying the material evenly on the glass substrate by a spraying method to form a dry film in a natural environment.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The thermal insulation coating energy-saving material of the present invention uses water-based resin as the main film-forming material, modified nano-cesium tungsten bronze and modified nano-silicon dioxide as nano-functional materials, and is supplemented with a light stabilizer to adjust the visible light, infrared light and ultraviolet light transmittance of the material. The excellent visible light transmittance and near-infrared light shielding performance of the modified nano-grade cesium tungsten bronze and the high transmittance and infrared blocking performance of the modified nano-silicon dioxide are utilized to enable the coating to have thermal insulation performance while maintaining high light transmittance.

[0026] (2) After the glass is coated with the heat-insulating and heat-insulating energy-saving coating material of the present invention, it can block more than 97% of infrared light and ultraviolet light while ensuring a high visible light transmittance of more than 76% for the glass, and has an excellent heat-insulating and cooling effect.

[0027] (3) The present invention adopts surface hydrophobic modified nano-cesium tungsten bronze to form chemical bonds on the surface of cesium tungsten bronze through dealcoholization reaction, so that the dispersion stability of nano-cesium tungsten bronze in water-based resin is improved by more than 70% and the sedimentation rate is reduced by 60%; after being compounded into thermal insulation coating energy-saving materials, the aging resistance is improved by 40%, the weather resistance is improved by 35%, and the thermal insulation performance is improved by 20%.

[0028] (4) The present invention uses a self-developed multifunctional composite wetting and dispersing agent, which allows nano-cesium tungsten bronze to be stably dispersed in water for more than 60 days, with the particle size distribution maintained in the range of 80-150nm. After compounding and forming a film, the weather resistance test shows no significant performance degradation for 1000 hours. At the same time, the amount of dispersant used is reduced, thereby improving the dispersion efficiency of the coating and reducing costs.

[0029] (5) The present invention can adjust the viscosity of the thermal insulation coating energy-saving material to a suitable state by limiting its content ratio and combining it with auxiliary agents. When it is applied to the glass, the coating can not only ensure the firmness of the adhesion, but also automatically level to ensure that the surface of the glass is smooth after coating.

[0030] (6) The fully infrared and ultraviolet transparent coating with self-cleaning function prepared by the present invention can be applied to the glass surface by spraying, rolling or brushing. Existing windows can be coated without replacing the glass. At the same time, the surface can be repaired at a later time if the coating is damaged.

[0031] (7) The coating obtained by using the fully shielding infrared and ultraviolet transparent coating with self-cleaning function prepared by the present invention has excellent self-cleaning function and is expected to be widely used as a new material in the field of building and automobile glass insulation. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The embodiments of the present invention and the features in the embodiments can be combined with each other unless there is a conflict.

[0033] Example 1

[0034] A thermal insulation and heat-insulating coated energy-saving material comprises the following raw materials in parts by weight: 90 parts of acrylic resin, 10 parts of modified nano-cesium tungsten bronze material, 5 parts of modified nano-silica, 1 part of light stabilizer, 0.1 part of silane coupling agent, 0.5 part of organic modified polysiloxane, 5 parts of wetting and dispersing agent, and 0.05 part of polyether siloxane copolymer; wherein the wetting and dispersing agent is composed of sodium polyacrylate, polyethylene glycol derivative, and γ-aminopropyltriethoxysilane in a mass ratio of 4:4:2; and the light stabilizer is composed of a hindered amine light stabilizer and a benzotriazole ultraviolet absorber in a mass ratio of 1:1.

[0035] A method for preparing a thermal insulation coating energy-saving material comprises the following steps:

[0036] (1) Preparation of modified nano-cesium tungsten bronze: S1. Dissolve tungsten hexachloride and cesium hydroxide in acetic acid and polyethylene glycol solvents, and stir magnetically to obtain a mixed liquid;

[0037] S2. The mixed liquid was added to a hydrothermal reactor and subjected to a hydrothermal reaction at 220°C-240°C for 24h-26h to obtain a reaction product; the reaction product was centrifuged, and the centrifuged material was dried to obtain nano-cesium tungsten bronze particles having a particle size of 5-10nm;

[0038] S3. Take the above-mentioned nano-cesium tungsten bronze particles and add ethanol to prepare a dispersion, add γ-methacryloxypropyltrimethoxysilane and triethylamine, heat to 70°C in an oil bath under nitrogen protection, stir and react for 24 hours, then use anhydrous ethanol to centrifuge and wash 2-4 times, and then dry at 50°C for 6 hours to obtain a hydrophobic surface-modified nano-cesium tungsten bronze material;

[0039] (2) Preparation of modified nano-silica: S1. Mixing aminopropyltriethoxysilane and perfluorodecyltriethoxysilane compounds, adding anhydrous ethanol and silica, respectively, hydrothermally stirring to react, and centrifuging to obtain a pretreated product;

[0040] S2. The pretreated product and polymethyl methacrylate were reacted in a solvent and centrifuged to obtain hydrophobically modified nano-silica;

[0041] (3) 90 parts of acrylic resin, 10 parts of modified nano-cesium tungsten bronze material, 5 parts of nano-modified silica, 1 part of light stabilizer, 0.1 part of silane coupling agent and deionized water were put into a dispersion tank in sequence, and uniformly dispersed at a speed of 900 r / min for 30 minutes to obtain a dispersion liquid; the above dispersion liquid was placed in a high-speed oscillating grinder and ground at a speed of 900 r / min for 30 minutes, and then the dispersion liquid was extracted and placed in a dispersion tank, 0.5 parts of organic modified polysiloxane, 5 parts of wetting dispersant and 0.05 parts of polyether siloxane copolymer were added to the dispersion tank and continued to disperse at a speed of 600 rpm for 20 minutes to obtain a thermal insulation coating energy-saving material.

[0042] Example 2

[0043] A thermal insulation and heat-insulating coated energy-saving material comprises the following raw materials in parts by weight: 100 parts of polyurethane resin, 20 parts of modified nano-cesium tungsten bronze material, 10 parts of modified nano-silica, 5 parts of light stabilizer, 0.5 parts of titanate coupling agent, 1.5 parts of organic modified polysiloxane, 7 parts of wetting and dispersing agent, and 0.05 parts of mineral oil defoaming agent; wherein the wetting and dispersing agent is composed of sodium polymethacrylate, polyethylene glycol derivative, and γ-methacryloyloxypropyltrimethoxysilane in a mass ratio of 4:4:2; and the light stabilizer is composed of a hindered amine light stabilizer and a benzotriazole ultraviolet absorber in a mass ratio of 1:1.

[0044] A method for preparing a thermal insulation coating energy-saving material comprises the following steps:

[0045] (1) Preparation of modified nano-cesium tungsten bronze: S1. Dissolve tungsten hexachloride and cesium hydroxide in acetic acid and polyethylene glycol solvents, and stir magnetically to obtain a mixed liquid;

[0046] S2. The mixed liquid was added to a hydrothermal reactor and subjected to a hydrothermal reaction at 220°C-240°C for 24h-26h to obtain a reaction product; the reaction product was centrifuged, and the centrifuged material was dried to obtain nano-cesium tungsten bronze particles having a particle size of 5-10nm;

[0047] S3. The nano-cesium tungsten bronze particles were prepared by adding ethanol to a dispersion, and γ-methacryloxypropyltrimethoxysilane and triethylamine were added. Under nitrogen protection, the mixture was heated to 80°C in an oil bath and stirred for 24 hours. The mixture was then washed by centrifugation with anhydrous ethanol 2-4 times and dried at 60°C for 5 hours to obtain a hydrophobic surface-modified nano-cesium tungsten bronze material.

[0048] (2) Preparation of modified nano-silica: S1. Mixing aminopropyltriethoxysilane and perfluorodecyltriethoxysilane compounds, adding anhydrous ethanol and silica, respectively, hydrothermally stirring to react, and centrifuging to obtain a pretreated product;

[0049] S2. The pretreated product and polymethyl methacrylate were reacted in a solvent and centrifuged to obtain hydrophobically modified nano-silica;

[0050] (3) 100 parts of polyurethane resin, 20 parts of modified nano-cesium tungsten bronze material, 10 parts of nano-modified silica, 5 parts of light stabilizer, 0.5 parts of titanate coupling agent and deionized water were put into a dispersion tank in sequence, and dispersed uniformly at a speed of 900 r / min for 30 minutes to obtain a dispersion liquid; the above dispersion liquid was placed in a high-speed vibration grinder and ground at a speed of 900 r / min for 30 minutes, and then the dispersion liquid was extracted and placed in a dispersion tank, 1.5 parts of organic modified polysiloxane, 7 parts of wetting dispersant and 0.05 parts of mineral oil defoaming agent were added to the dispersion tank and continued to disperse at a speed of 700 rpm for 15 minutes to obtain a thermal insulation coating energy-saving material.

[0051] Example 3

[0052] A thermal insulation and heat-insulating coating energy-saving material comprises the following raw materials in parts by weight: 120 parts of epoxy resin, 25 parts of modified nano-cesium tungsten bronze material, 20 parts of modified nano-silica, 10 parts of light stabilizer, 1 part of organic carboxylic acid coupling agent, 3 parts of organic modified polysiloxane, 10 parts of wetting and dispersing agent, and 0.1 part of polyether siloxane copolymer; wherein the wetting and dispersing agent is composed of sodium polyphosphate, polyethylene glycol derivative, and γ-methacryloxypropyltrimethoxysilane in a mass ratio of 4:4:2; and the light stabilizer is composed of a hindered amine light stabilizer and a benzotriazole ultraviolet absorber in a mass ratio of 1:1.

[0053] A method for preparing a thermal insulation coating energy-saving material comprises the following steps:

[0054] (1) Preparation of modified nano-cesium tungsten bronze: S1. Dissolve tungsten hexachloride and cesium hydroxide in acetic acid and polyethylene glycol solvents, and stir magnetically to obtain a mixed liquid;

[0055] S2. The mixed liquid was added to a hydrothermal reactor and subjected to a hydrothermal reaction at 220°C-240°C for 24h-26h to obtain a reaction product; the reaction product was centrifuged, and the centrifuged material was dried to obtain nano-cesium tungsten bronze particles having a particle size of 5-10nm;

[0056] S3. The nano-cesium tungsten bronze particles were prepared by adding ethanol to a dispersion, and γ-methacryloxypropyltrimethoxysilane and triethylamine were added. Under nitrogen protection, the mixture was heated to 80°C in an oil bath, stirred and reacted for 24 hours, and then washed by centrifugation with anhydrous ethanol 2-4 times, and then dried at 70°C for 4 hours to obtain a hydrophobic surface-modified nano-cesium tungsten bronze material.

[0057] (2) Preparation of modified nano-silica: S1. Mixing aminopropyltriethoxysilane and perfluorodecyltriethoxysilane compounds, adding anhydrous ethanol and silica, respectively, hydrothermally stirring to react, and centrifuging to obtain a pretreated product;

[0058] S2. The pretreated product and polymethyl methacrylate were reacted in a solvent and centrifuged to obtain hydrophobically modified nano-silica;

[0059] (3) 120 parts of epoxy resin, 25 parts of modified nano-cesium tungsten bronze material, 20 parts of nano-modified silica, 10 parts of light stabilizer, 1 part of organic carboxylic acid coupling agent, and deionized water are sequentially put into a dispersion tank, and uniformly dispersed at a speed of 900 r / min for 30 minutes to obtain a dispersion liquid; the above dispersion liquid is placed in a high-speed oscillating grinder and ground at a speed of 900 r / min for 30 minutes, and then the dispersion liquid is extracted and placed in a dispersion tank, 3 parts of organic modified polysiloxane, 10 parts of wetting dispersant, and 0.1 part of polyether siloxane copolymer are added to the dispersion tank and continued to disperse at a speed of 600-800 rpm for 10-20 minutes to obtain a thermal insulation coating energy-saving material.

[0060] Example 4

[0061] A thermal insulation and heat-insulating coated energy-saving material comprises the following raw materials in parts by weight: 100 parts of polyurethane resin, 25 parts of modified nano-cesium tungsten bronze material, 15 parts of modified nano-silica, 6 parts of light stabilizer, 0.5 parts of silane coupling agent, 1.5 parts of organic modified polysiloxane, 7 parts of wetting and dispersing agent, and 0.05 parts of polyether siloxane copolymer; wherein the wetting and dispersing agent is composed of sodium polymethacrylate, polyethylene glycol derivative, and γ-methacryloxypropyltrimethoxysilane in a mass ratio of 4:4:2; and the light stabilizer is composed of a hindered amine light stabilizer and a benzotriazole ultraviolet absorber in a mass ratio of 1:1.

[0062] A method for preparing a thermal insulation coating energy-saving material comprises the following steps:

[0063] (1) Preparation of modified nano-cesium tungsten bronze: S1. Dissolve tungsten hexachloride and cesium hydroxide in acetic acid and polyethylene glycol solvents, and stir magnetically to obtain a mixed liquid;

[0064] S2. The mixed liquid was added to a hydrothermal reactor and subjected to a hydrothermal reaction at 220°C-240°C for 24h-26h to obtain a reaction product; the reaction product was centrifuged, and the centrifuged material was dried to obtain nano-cesium tungsten bronze particles having a particle size of 5-10nm;

[0065] S3. The nano-cesium tungsten bronze particles were prepared by adding ethanol to a dispersion, and γ-methacryloxypropyltrimethoxysilane and triethylamine were added. Under nitrogen protection, the mixture was heated in an oil bath to 70-80°C and stirred for 24 hours. The mixture was then washed 2-4 times by centrifugation with anhydrous ethanol and dried at 50-70°C for 4-6 hours to obtain a hydrophobic surface-modified nano-cesium tungsten bronze material.

[0066] (2) Preparation of modified nano-silica: S1. Mixing aminopropyltriethoxysilane and perfluorodecyltriethoxysilane compounds, adding anhydrous ethanol and silica, respectively, hydrothermally stirring to react, and centrifuging to obtain a pretreated product;

[0067] S2. The pretreated product and polymethyl methacrylate were reacted in a solvent and centrifuged to obtain hydrophobically modified nano-silica;

[0068] (3) 100 parts of polyurethane resin, 25 parts of modified nano-cesium tungsten bronze material, 15 parts of nano-modified silica, 6 parts of light stabilizer, 0.5 parts of silane coupling agent and deionized water are sequentially put into a dispersion tank, and uniformly dispersed at a speed of 900 r / min for 30 minutes to obtain a dispersion liquid; the above dispersion liquid is placed in a high-speed oscillating grinder and ground at a speed of 900 r / min for 30 minutes, and then the dispersion liquid is extracted and placed in a dispersion tank, 1.5 parts of organic modified polysiloxane, 7 parts of wetting dispersant and 0.05 parts of polyether siloxane copolymer are added to the dispersion tank and continued to disperse at a speed of 600-800 rpm for 10-20 minutes to obtain a thermal insulation coating energy-saving material.

[0069] Comparative Example 1

[0070] A thermal insulation and heat-insulating coated energy-saving material comprises the following raw materials in parts by weight: 100 parts of polyurethane resin, 15 parts of modified nano-cesium tungsten bronze material, 10 parts of modified nano-silica, 6 parts of light stabilizer, 0.5 parts of silane coupling agent, 1.5 parts of organic modified polysiloxane, 7 parts of wetting and dispersing agent, and 0.05 parts of polyether siloxane copolymer; wherein the wetting and dispersing agent is composed of sodium polymethacrylate, polyethylene glycol derivative, and γ-methacryloxypropyltrimethoxysilane in a mass ratio of 4:4:2; and the light stabilizer is composed of a hindered amine light stabilizer and a benzotriazole ultraviolet absorber in a mass ratio of 1:1.

[0071] The preparation method is the same as that of Example 4.

[0072] Comparative Example 2

[0073] Compared with Example 4, the modified nano-cesium tungsten bronze material component is deleted from the formula of Comparative Example 1, and the remaining components and preparation method are the same as those of Example 4.

[0074] Comparative Example 3

[0075] Compared with Example 4, the modified nano-silica component is deleted from the formula of Comparative Example 1, and the remaining components and preparation method are the same as those of Example 4.

[0076] Comparative Example 4

[0077] Compared with Example 4, the modified nano-cesium tungsten bronze material in the formula of Comparative Example 1 is replaced with nano-cesium tungsten bronze particles, step S3 is deleted in the preparation process of step (1), and the remaining components and preparation method are the same as those of Example 4.

[0078] Comparative Example 5

[0079] Compared with Example 4, the modified nano-cesium tungsten bronze material in the formula of Comparative Example 1 is replaced with nano-ATO commonly available on the market, and step (1) is deleted to prepare the modified nano-cesium tungsten bronze material. The remaining components and preparation method are the same as those in Example 4.

[0080] Comparative Example 6

[0081] Compared with Example 4, the wetting and dispersing agent in the formula of Comparative Example 1 is replaced by a high molecular weight alkyl ammonium salt copolymer dispersant, and the remaining components and preparation method are the same as those of Example 4.

[0082] test

[0083] The glass to be coated was soaked in an ethyl acetate solution for 20 minutes, then rinsed for 5 minutes and dried in an oven for 40 minutes to obtain clean glass. The materials prepared in Examples 1-4 and Comparative Examples 1-6 were then evenly sprayed onto the glass substrate using a spraying method to form a dry film under natural conditions, thereby obtaining thermal insulating glass. The dry film thickness was 18 μm. A blank control group was also prepared, in which the glass was soaked in an ethyl acetate solution for 20 minutes, then rinsed for 5 minutes, and dried in an oven for 40 minutes to obtain clean blank glass.

[0084] The thermal insulating glasses prepared in Examples 1-4 and Comparative Examples 1-6, as well as blank glass prepared in a blank control group, were tested as follows: Adhesion of the glass coating was measured according to GB / T 4893.4-2013, with a scale of 0 to 5, with 0 being the best and 5 being the worst. Water resistance was tested according to GB / T 1733-1993 at room temperature (25°C) for 72 hours, with a scale of 1 to 4, with 1 being the best and 4 being the worst. Grade 1: No change in the film; Grade 2: Slight blistering with no flaking; Grade 3: Slight wrinkling and flaking of the film; Grade 4: Extensive blistering, wrinkling, and flaking of the film. UV aging resistance of the glass coating was tested according to JG / T 338-2011. Optical transmittance of the glass at 200-2500 nm was measured using a UV-Vis-NIR spectrophotometer according to GB / T 2680-1994. The test results are shown in Table 1.

[0085] Table 1 Test results of glass prepared in different experiments

[0086]

[0087]

[0088] According to the above experimental test results, the heat-insulating glass of Examples 1-4 coated with the heat-insulating coating energy-saving material of the present invention has significantly improved ultraviolet light absorption rate and near-infrared blocking rate compared with blank glass; and the visible light transmittance is maintained at above 76%, which meets the daily light transmittance requirements; Comparing the test results of Example 4 with those of Comparative Example 1, it can be seen that the coating of Comparative Example 1 reduces the content of modified nano-cesium tungsten bronze material and modified nano-silica during preparation, resulting in a decrease in ultraviolet light absorption rate and near-infrared blocking rate of Comparative Example 1, but the visible light transmittance is maintained at above 76%. The transmittance is improved; it can be seen that the content of modified nano-cesium tungsten bronze material and modified nano-silica directly affects the optical properties of the coating; compared with Example 4, the modified nano-cesium tungsten bronze material and modified nano-silica were deleted from the coatings of Comparative Examples 2 and 3 during preparation, resulting in a significant decrease in ultraviolet light absorption rate and near-infrared blocking rate; from the experimental data of Comparative Example 6, it can be seen that the wetting dispersant has a great influence on the aging resistance and adhesion of the coating, and the performance of the independently developed wetting dispersant used in the present invention is far superior to the traditional wetting dispersants currently on the market.

[0089] In summary, the thermal insulation coating energy-saving material of the present invention uses water-based resin as the main film-forming material, modified nano-cesium tungsten bronze and modified nano-silica as nano-functional materials, and is supplemented with a light stabilizer to adjust the visible light, infrared light and ultraviolet light transmittance of the material. By utilizing the excellent visible light transmittance and near-infrared light shielding performance of modified nano-grade cesium tungsten bronze and the high transmittance and infrared blocking performance of modified nano-silica, it can ensure a high visible light transmittance of more than 76% for the glass while blocking more than 97% of infrared light and ultraviolet light, thereby having an excellent thermal insulation and cooling effect.

[0090] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A thermal insulation coating energy-saving material, characterized by: The invention comprises the following raw materials in parts by weight: 90-120 parts of water-based resin, 10-25 parts of modified nano-cesium tungsten bronze material, 5-20 parts of modified nano-silicon dioxide, 1-10 parts of light stabilizer, 0.1-1 parts of coupling agent, 0.5-3 parts of leveling agent, 5-10 parts of wetting and dispersing agent and 0.05-0.1 parts of defoaming agent.

2. The thermal insulation coating energy-saving material according to claim 1, characterized in that: The water-based resin is selected from one or more of acrylic resin, polyurethane resin and epoxy resin.

3. The thermal insulation coating energy-saving material according to claim 1, characterized in that: The modified nano-cesium tungsten bronze slurry is prepared by the following method: S1. Dissolve tungsten hexachloride and cesium hydroxide in acetic acid and polyethylene glycol solvents and stir magnetically to obtain a mixed liquid; S2. The mixed liquid was added to a hydrothermal reactor and subjected to a hydrothermal reaction at 220°C-240°C for 24h-26h to obtain a reaction product; the reaction product was centrifuged, and the centrifuged material was dried to obtain nano-cesium tungsten bronze particles having a particle size of 5-10nm; S3. Take the above-mentioned nano-cesium tungsten bronze particles and add ethanol to prepare a dispersion, add γ-methacryloxypropyltrimethoxysilane and triethylamine, and heat to 70-80°C in an oil bath under nitrogen protection. Stir and react for 24 hours, then use anhydrous ethanol to centrifuge and wash 2-4 times, and then dry at 50-70°C for 4-6 hours to obtain a hydrophobic surface-modified nano-cesium tungsten bronze material.

4. The thermal insulation coating energy-saving material according to claim 1, characterized in that: The modified nano-silica is prepared by the following method: S1. The aminopropyl triethoxysilane and perfluorodecyl triethoxysilane compounds were mixed, anhydrous ethanol and silica were added, the reaction was stirred hydrothermally, and the pretreated material was obtained by centrifugation; S2. reacting the pretreated product with polymethyl methacrylate in a solvent, and centrifugally drying the resultant to obtain hydrophobically modified nano-silica.

5. The thermal insulation coating energy-saving material according to claim 1, characterized in that: The wetting and dispersing agent is composed of a polymer polyelectrolyte, a nonionic surfactant, and an organic silane coupling agent in a mass ratio of 4:4:

2.

6. The thermal insulation coating energy-saving material according to claim 5, characterized in that: The polymer polyelectrolyte includes one or more of sodium polyacrylate, sodium polymethacrylate, and sodium polyphosphate; the nonionic surfactant includes a polyethylene glycol derivative; and the organic silane coupling agent includes one or two of γ-aminopropyltriethoxysilane and γ-methacryloxypropyltrimethoxysilane.

7. The thermal insulation coating energy-saving material according to claim 1, characterized in that: The light stabilizer is composed of a hindered amine light stabilizer and a benzotriazole ultraviolet absorber in a mass ratio of 1:

1.

8. A method for preparing the thermal insulation coating energy-saving material according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: sequentially putting water-based resin, modified nano-cesium tungsten bronze material, nano-modified silicon dioxide, a light stabilizer, a coupling agent and deionized water into a dispersion tank, uniformly dispersing the mixture at a certain rotation speed for a period of time to obtain a dispersion liquid; placing the dispersion liquid into a high-speed oscillating grinder, grinding the dispersion liquid, and then extracting the dispersion liquid and placing the dispersion liquid into a dispersion tank; adding a leveling agent, a wetting dispersant and a defoaming agent into the dispersion tank, and continuing to disperse the mixture at a rotation speed of 600-800 rpm to obtain a thermal insulation coating energy-saving material.

9. Application of the thermal insulation coating energy-saving material according to any one of claims 1 to 8 on glass, characterized in that: The thermal insulation and heat-insulating energy-saving coating material described in any one of claims 1 to 7 is used to coat the glass, and the coating treatment includes cleaning and drying the glass in sequence, spraying the material evenly on the glass substrate by a spraying method, and forming a dry film in a natural environment.

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