阅读说明：本技术 涂料及其制备方法及应用 (Coating and preparation method and application thereof ) 是由 徐扬 刘源 王敏嘉 李贺东 吴闻涛 吴石路 徐帅桦 于 2020-06-12 设计创作，主要内容包括：本发明涉及节能材料领域,公开了涂料及其制备方法及应用,该涂料包括：中空氧化锡锑、气凝胶和硅丙乳液,所述中空氧化锡锑、所述气凝胶和所述硅丙乳液的质量比为0.2-2.4：0.1-2.4：100。该涂料中,中空氧化锡锑填料的近红外阻隔性能优良、导热系数较小、辐射率高,主要以散射和辐射放热的形式抵抗环境热辐射,中空的设计兼顾传导阻热,该涂料属于水性材料,易降解,绿色环保,并且涂料中没有块体材料的应用安全隐患,因此,不易开裂、渗水,保温隔热效果好,并且该涂料不易脱落且容易修补。(The invention relates to the field of energy-saving materials, and discloses a coating, a preparation method and application thereof, wherein the coating comprises the following components: the adhesive comprises hollow tin antimony oxide, aerogel and silicone-acrylate emulsion, wherein the mass ratio of the hollow tin antimony oxide to the aerogel to the silicone-acrylate emulsion is (0.2-2.4): 0.1-2.4: 100. in the coating, the near-infrared barrier property of the hollow tin antimony oxide filler is excellent, the heat conductivity coefficient is small, the radiance is high, the environment heat radiation is mainly resisted in the forms of scattering and radiation heat release, the hollow design is taken into consideration for conduction heat resistance, the coating belongs to a water-based material, the coating is easy to degrade and environment-friendly, and the application potential safety hazard of a block material is avoided in the coating, so that the coating is not easy to crack and seep water, the heat insulation effect is good, and the coating is not easy to fall off and is easy to repair.)

1. A coating, comprising: hollow tin antimony oxide, aerogel and silicone acrylic emulsion; wherein the mass ratio of the hollow tin antimony oxide to the aerogel to the silicone-acrylic emulsion is 0.2-2.4: 0.1-2.4: 100.

2. the coating of claim 1, wherein the hollow antimony tin oxide has a molar ratio of tin to antimony of 2.3 to 99: 1, preferably 4-21: 1;

and/or the shell layer thickness of the hollow tin antimony oxide is 7-15nm, the particle size is 100-500nm, and the cavity rate is 75-95 vol%;

and/or the hollow tin antimony oxide has a thermal conductivity of 0.05-0.15W/(m.K), an infrared emissivity of 0.8-0.98 and a specific heat capacity of 0.4-0.6J/(g.DEG C);

preferably, the aerogel is selected from silica aerogel and/or titania aerogel;

preferably, the silicone acrylic emulsion comprises silicone acrylic acid, a solvent, a dispersing agent, a thickening agent, a defoaming agent, a film forming aid and a pH regulator;

and/or the mass ratio of the organic silicon acrylic acid, the solvent, the dispersant, the thickener, the defoamer, the film-forming assistant and the pH regulator is 50: 50-80: 0.3-0.8: 0.3-0.8: 0.3-0.8: 0.5-1.5: 0.1-0.5.

3. The coating of claim 2, wherein the silicone acrylic is a copolymer of a silicone monomer and an acrylic monomer, wherein the silicone monomer is selected from at least one of gamma-aminopropyltriethoxysilane, vinyltrimethoxysilane, and vinyltriethoxysilane;

and/or, the solvent is selected from water and/or ethanol, preferably water;

and/or the dispersing agent is selected from sodium tripolyphosphate and/or sodium hexametaphosphate, preferably sodium hexametaphosphate;

and/or, the thickener is selected from hydroxyethyl cellulose and/or starch, preferably hydroxyethyl cellulose;

and/or the defoaming agent is selected from general-purpose water-based defoaming agents and/or organic silicon defoaming agents, preferably general-purpose water-based defoaming agents;

and/or the film forming aid is selected from propylene glycol butyl ether and/or ethylene glycol, preferably ethylene glycol;

and/or the pH regulator is selected from ammonia water and/or sodium hydroxide solution, preferably ammonia water.

4. A method of preparing a coating, the method comprising:

(1) contacting a sugar source with water to perform hydrothermal reaction, and then sequentially performing separation, drying and grinding to obtain first powder;

(2) in ethanol, contacting the first powder with a tin precursor and an antimony precursor to perform hydrothermal reaction, and then sequentially separating, drying and roasting the product to obtain second powder; then dispersing the second powder in ethanol to form a suspension, wherein the solid obtained by separating the suspension is hollow tin antimony oxide;

(3) mixing organic silicon acrylic acid, a solvent, a dispersing agent, a thickening agent, a defoaming agent, a film forming auxiliary agent and a pH regulator to obtain a silicone-acrylic emulsion;

(4) and mixing the hollow tin antimony oxide, the aerogel and the silicone-acrylate emulsion to obtain the coating.

5. The method of claim 4, wherein in step (1), the mass ratio of the sugar source to the water is 5: 20-60 parts of;

the sugar source is a substance and/or monosaccharide which can be hydrolyzed to generate monosaccharide, and is preferably glucose;

and/or the temperature of the hydrothermal reaction is 150-200 ℃ and the time is 3-6 h.

6. The method according to claim 4, wherein in step (2), the tin precursor is a water-soluble tin salt; preferably, the tin precursor is selected from anhydrous tin tetrachloride and/or stannous chloride dihydrate, preferably stannous chloride dihydrate;

and/or the antimony precursor is water-soluble antimony salt; preferably, the antimony precursor is selected from antimony trichloride and/or antimony nitrate, preferably antimony trichloride;

and/or the temperature of the hydrothermal reaction is 150-200 ℃ and the time is 3-6 h;

and/or the roasting temperature is 500-600 ℃, and the time is 2-5 h;

and/or the mass ratio of the first powder to the tin precursor to the antimony precursor is 1-3: 8-19: 1;

preferably, in the step (3), the mass ratio of the silicone acrylic acid, the solvent, the dispersant, the thickener, the defoamer, the film-forming aid, and the pH adjuster is 50: 50-80: 0.3-0.8: 0.3-0.8: 0.3-0.8: 0.5-1.5: 0.1-0.5;

and/or the organosilicon acrylic acid is a copolymer of an organosilicon monomer and an acrylic acid monomer, wherein the organosilicon monomer is at least one selected from gamma-aminopropyl triethoxysilane, vinyl trimethoxy silane and vinyl triethoxysilane;

and/or, the solvent is selected from water and/or ethanol, preferably water;

and/or the dispersing agent is selected from sodium tripolyphosphate and/or sodium hexametaphosphate, preferably sodium hexametaphosphate;

and/or, the thickener is selected from hydroxyethyl cellulose and/or starch, preferably hydroxyethyl cellulose;

and/or the defoaming agent is selected from general-purpose water-based defoaming agents and/or organic silicon defoaming agents, preferably general-purpose water-based defoaming agents;

and/or the film forming aid is selected from propylene glycol butyl ether and/or ethylene glycol, preferably ethylene glycol;

and/or the pH regulator is selected from ammonia water and/or sodium hydroxide solution, preferably ammonia water;

preferably, in the step (4), the mass ratio of the hollow tin antimony oxide to the aerogel to the silicone-acrylic emulsion is 0.2-2.4: 0.1-2.4: 100, respectively;

and/or, the aerogel is selected from a silica aerogel and/or a titania aerogel.

7. A coating, characterized in that it is prepared by the process according to any one of claims 4 to 6.

8. An energy saving material, comprising: a substrate and a coating on the surface of said substrate, said coating being prepared using the coating of claims 1-3 and 7.

9. The energy saving material of claim 8, wherein the coating has a thickness of 20-40 μm;

preferably, the substrate is a transparent material selected from at least one of glass, epoxy and polyurethane, preferably glass.

10. A method for preparing an energy-saving material, which is characterized by comprising the following steps: coating the coating material according to any one of claims 1 to 3 and 7 on the surface of a substrate, and drying to obtain the energy-saving material containing the coating.

Technical Field

The invention relates to the field of energy-saving materials, in particular to a coating and a preparation method and application thereof.

Background

To solve the energy crisis and to improve the comfort of living environment, energy-saving materials are widely used in building structures. The traditional building energy-saving material mostly adopts loose macroporous blocks with small heat conductivity coefficient, such as hard polyurethane foam, expanded polystyrene foam, thermal mortar, foam glass, foam concrete and the like, and realizes heat insulation mainly through isolated heat conduction, but the traditional block material is easy to crack and seep water, thereby greatly weakening the heat insulation effect. And the block material is easy to fall off and difficult to degrade, and the later treatment cost of the block material as construction waste is higher. The novel energy-saving material is represented by paint mixed with various fillers, and can be used for building envelope structures such as glass or walls. For transparent glass, the coating can transmit visible light while blocking ultraviolet and infrared light and heat by reflection, absorption, and the like. For opaque walls, light and heat can be insulated by reflection, radiation and low thermal conduction.

Disclosure of Invention

The invention aims to overcome the technical defects in the prior art and provides a coating and a preparation method and application thereof. In the coating, the near-infrared barrier property of the hollow tin antimony oxide filler is excellent, the heat conductivity coefficient is small, the radiance is high, the environment heat radiation is mainly resisted in the forms of scattering and radiation heat release, the hollow design is taken into consideration for conduction heat resistance, the coating belongs to a water-based material, the coating is easy to degrade and environment-friendly, and the application potential safety hazard of a block material is avoided in the coating, so that the coating is not easy to crack and seep water, the heat insulation effect is good, and the coating is not easy to fall off and is easy to repair.

The inventor of the invention discovers in research that the hollow tin oxide antimony has stronger absorption in an infrared light area, smaller heat conductivity coefficient, larger specific heat capacity and larger infrared emissivity, and in addition, the hollow tin oxide antimony has better thermal performance and radiation heat dissipation, so that the hollow tin oxide antimony is a heat-insulating material which can simultaneously insulate heat by absorption, radiation, low heat conduction, multi-heat storage and other modes; the coating belongs to a water-based material, is easy to degrade and environment-friendly, does not have the potential safety hazard of application of a block material, is not easy to crack and seep, has a good heat insulation effect, and is not easy to drop and easy to repair. The present invention was thus obtained.

In order to achieve the above object, a first aspect of the present invention provides a paint comprising: the adhesive comprises hollow tin antimony oxide, aerogel and silicone-acrylate emulsion, wherein the mass ratio of the hollow tin antimony oxide to the aerogel to the silicone-acrylate emulsion is (0.2-2.4): 0.1-2.4: 100.

in a second aspect the present invention provides a method of preparing a coating, the method comprising:

(1) contacting a sugar source with water to perform hydrothermal reaction, and then sequentially performing separation, drying and grinding to obtain first powder;

(2) in ethanol, contacting the first powder with a tin precursor and an antimony precursor to perform hydrothermal reaction, and then sequentially separating, drying and roasting the product to obtain second powder; then dispersing the second powder in ethanol to form a suspension, wherein the solid obtained by separating the suspension is hollow tin antimony oxide;

(3) mixing organic silicon acrylic acid, a solvent, a dispersing agent, a thickening agent, a defoaming agent, a film forming auxiliary agent and a pH regulator to obtain a silicone-acrylic emulsion;

(4) and mixing the hollow tin antimony oxide, the aerogel and the silicone-acrylate emulsion to obtain the coating.

In a third aspect of the invention, a coating is provided, which is prepared by the above method.

In a fourth aspect of the present invention, there is provided an energy saving material comprising: the coating comprises a base material and a coating on the surface of the base material, wherein the coating is prepared by adopting the coating.

In a fifth aspect of the present invention, there is provided a method for preparing an energy saving material, the method comprising: and (3) coating the coating on the surface of a base material, and drying to obtain the energy-saving material containing the coating.

Through the technical scheme, the coating containing the hollow tin antimony oxide can be used for preparing the energy-saving material with good light-insulating and heat-insulating effects by coating the surface of the base material to form a coating, so that the energy-saving effects of various heat-insulating modes such as absorption, radiation, low heat conduction, multiple heat storage and the like can be realized, and the prepared energy-saving material can be widely applied to building structures. The preparation method of the coating provided by the invention is simple and environment-friendly, has a short preparation period and low raw material price, and is easy for large-scale production and application.

Drawings

FIG. 1 is a scanning electron microscope photograph of a hollow tin antimony oxide obtained according to example 1 of the present invention;

FIG. 2 is a transmission electron microscope photograph of a hollow tin antimony oxide obtained according to example 1 of the present invention.

Detailed Description

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.

The present invention provides, in a first aspect, a coating comprising: the adhesive comprises hollow tin antimony oxide, aerogel and silicone-acrylate emulsion, wherein the mass ratio of the hollow tin antimony oxide to the aerogel to the silicone-acrylate emulsion is (0.2-2.4): 0.1-2.4: 100.

in some embodiments of the present invention, to improve the light and heat insulation effect of the coating, the hollow tin antimony oxide is preferably composed. Preferably, in the hollow tin antimony oxide, the molar ratio of the tin element to the antimony element is 2.3-99: 1, preferably 4-21: 1.

In some embodiments of the present invention, the particle size of hollow tin antimony oxide is limited to submicron (100-1000nm), and the particles mainly in submicron order scatter light very strongly, and if used on the surface of glass, the light transmission is affected in case of large doping amount. In addition, the shell layer is thin, and the cavity rate is high so as to reduce the heat conductivity coefficient. Preferably, the shell layer thickness of the hollow tin antimony oxide is 7-15nm, the particle size is 100-500nm, and the cavity ratio is 75-95%, specifically, the particle size is 100-500nm, which mainly insulates heat and ensures that the hollow tin antimony oxide has certain transmission on visible light, otherwise, the particle size is too large and the scattering on the visible light is too strong. The cavity rate of 75-95% is mainly to provide a low thermal conductivity, slow heat conduction, solid sphere heat transfer is block-like material transfer, hollow sphere heat transfer is curved transfer and limited heat transfer capability.

In some embodiments of the invention, the hollow antimony tin oxide has a thermal conductivity of 0.05-0.15W/(m.K), an IR emissivity of 0.8-0.98, and a specific heat capacity of 0.4-0.6J/(g.deg.C).

In some embodiments of the present invention, the aerogel may be a substance possessing extremely high porosity and thermal conductivity, preferably, the aerogel is selected from silica aerogel and/or titania aerogel. More preferably, the aerogel is silica aerogel, the porosity of the silica aerogel is not less than 80%, and the thermal conductivity is 0.015-0.03W/(m.K).

In some embodiments of the present invention, the silicone-acrylic emulsion has low refractive index, good weather resistance and strong adhesion, and preferably comprises silicone acrylic acid, a solvent, a dispersant, a thickener, an antifoaming agent, a film forming aid and a pH regulator. More preferably, the mass ratio of the silicone acrylic acid, the solvent, the dispersant, the thickener, the defoamer, the film-forming aid, and the pH adjuster is 50: 50-80: 0.3-0.8: 0.3-0.8: 0.3-0.8: 0.5-1.5: 0.1-0.5. Specifically, the pH value of the silicone-acrylate emulsion is 9-11.

In some embodiments of the present invention, preferably, the silicone acrylic is a copolymer of a silicone monomer and an acrylic monomer, wherein the silicone monomer is selected from at least one of γ -aminopropyltriethoxysilane, vinyltrimethoxysilane and vinyltriethoxysilane. It should be noted that the source of the silicone acrylic acid in the present invention is not limited, and the silicone acrylic acid can be obtained commercially or prepared by methods described in the prior art, and will not be described herein again. BF-400B is commercially available from, for example, Yousol chemical technology, Inc. in Shandong, and the organosilicon monomer of BF-400B is gamma-aminopropyltriethoxysilane.

In some embodiments of the invention, preferably, the solvent is selected from water and/or ethanol. More preferably, the solvent is water.

In some embodiments of the present invention, preferably, the dispersant is selected from sodium tripolyphosphate and/or sodium hexametaphosphate; more preferably, the dispersant is sodium hexametaphosphate.

In some embodiments of the invention, preferably, the thickener is selected from hydroxyethylcellulose and/or starch; more preferably, the thickener is hydroxyethyl cellulose.

In some embodiments of the present invention, preferably, the defoamer is selected from general purpose aqueous defoamers and/or silicone defoamers; more preferably, the defoamer is a general-purpose aqueous defoamer polymerized from an oil fatty alcohol, an amide, a polyether, and a hydrocarbon. Commercially available, for example SERDAS7005, a sea name, steud chemical ltd.

In some embodiments of the present invention, preferably, the coalescent is selected from propylene glycol butyl ether and/or ethylene glycol; more preferably, the coalescing agent is ethylene glycol.

In some embodiments of the present invention, preferably, the pH adjusting agent is selected from ammonia and/or sodium hydroxide solution; more preferably, the pH adjuster is ammonia water.

In some embodiments of the present invention, preferably, the mass ratio of the hollow tin antimony oxide, the aerogel and the silicone-acrylate emulsion is 0.6-2:0.6-2: 100.

in some embodiments of the invention, the mass ratio of the hollow tin antimony oxide, the aerogel and the silicone acrylic emulsion is 0.2-2.4: 0.1-2.4: 100, preferably 0.6-2:0.6-2: 100. The coating with excellent thermal resistance can be obtained through the synergistic effect of the hollow tin antimony oxide, the aerogel and the silicone-acrylate emulsion, belongs to a water-based material, is green and environment-friendly, has no potential safety hazard of the application of a block material, and is easy to repair.

In a second aspect the present invention provides a method of preparing a coating, the method comprising:

(1) contacting a sugar source with water to perform hydrothermal reaction, and then sequentially performing separation, drying and grinding to obtain first powder;

(2) in ethanol, contacting the first powder with a tin precursor and an antimony precursor to perform hydrothermal reaction, and then sequentially separating, drying and roasting the product to obtain second powder; then dispersing the second powder in ethanol to form a suspension, wherein the solid obtained by separating the suspension is hollow tin antimony oxide;

(3) mixing organic silicon acrylic acid, a solvent, a dispersing agent, a thickening agent, a defoaming agent, a film forming auxiliary agent and a pH regulator to obtain a silicone-acrylic emulsion;

(4) and mixing the hollow tin antimony oxide, the aerogel and the silicone-acrylate emulsion to obtain the coating.

In some embodiments of the present invention, to prepare the nanocarbon sphere template, i.e., the first powder, in step (1), the mass ratio of the sugar source to the water is preferably 5: 20-60 parts of; the sugar source is a substance capable of being hydrolyzed to generate monosaccharide and/or monosaccharide, and more preferably, the sugar source is glucose.

In some embodiments of the present invention, in order to make the hydrothermal reaction in step (1) more complete, preferably, in step (1), the temperature of the hydrothermal reaction may be 150-. The hydrothermal reaction time can be 3-6 h.

In some embodiments of the present invention, the drying manner in step (1) is not particularly limited, and may be a natural drying manner or a drying manner in a drying device.

In some embodiments of the present invention, the particle size of the first powder is not limited, and preferably, the particle size of the first powder is 50 to 200 nm.

In some embodiments of the present invention, preferably, in step (2), the tin precursor is a water-soluble tin salt, more preferably, the tin precursor is selected from anhydrous tin tetrachloride and/or stannous chloride dihydrate, preferably stannous chloride dihydrate.

In some embodiments of the present invention, preferably, in step (2), the antimony precursor is a water-soluble antimony salt, preferably, the antimony precursor is selected from antimony trichloride and/or antimony nitrate, preferably antimony trichloride.

In some embodiments of the present invention, to promote the hydrothermal reaction in step (2), preferably, in step (2), the temperature of the hydrothermal reaction may be 150-. The hydrothermal reaction time can be 3-6 h.

In some embodiments of the present invention, preferably, in the step (2), the temperature of the calcination may be 500-600 ℃, and the calcination time may be 2-5 h.

In some embodiments of the present invention, preferably, in step (2), the mass ratio of the first powder, the tin precursor, and the antimony precursor is 1 to 3: 8-19: 1, preferably 1.8-2.2:8.9-18.8: 1. Specifically, the mass ratio of the first powder, the tin precursor and the antimony precursor is within the above range, and the obtained hollow tin antimony oxide has the advantages of thin shell layer thickness, large cavity rate, low heat conductivity coefficient, low infrared emissivity and large specific heat capacity, so that the obtained hollow tin antimony oxide has a strong shielding effect on photo-heat.

In some embodiments of the present invention, in step (2), ultrasonic means may be used to accelerate the dissolution of the first powder in ethanol, and the ultrasonic time is not limited as long as the first powder can be dissolved in ethanol, and preferably, the ultrasonic time is 0.5 to 1 hour.

In some embodiments of the present invention, in order to disperse the particle size of the hollow tin antimony oxide more uniformly, it is preferable to disperse the first powder in the solvent to form a suspension a with ultrasound and stirring; then dispersing a tin precursor and an antimony precursor in a solvent with stirring to form a suspension B; then mixing the suspension A and the solution B for hydrothermal reaction, and separating, washing and drying to obtain second powder; roasting the second powder at 500-600 deg.c for 2-5 hr, and setting the temperature raising rate of the roasting equipment at 5 deg.c/min; and then dispersing the powder obtained after roasting in a solvent, carrying out centrifugal separation on the obtained mixed system at 300r/min in 100-. The solvent is preferably ethanol. The separation of the mixed system adopts two times of centrifugal separation, and the obtained hollow tin antimony oxide is more suitable for solving the technical problem of the invention.

In some embodiments of the present invention, the drying manner in step (2) is not particularly limited, and may be a natural drying manner or a drying manner in a drying device.

In some embodiments of the present invention, preferably, in step (3), the mass ratio of the silicone acrylic acid, the solvent, the dispersant, the thickener, the defoamer, the film-forming aid, and the pH adjuster is 50: 50-80: 0.3-0.8: 0.3-0.8: 0.3-0.8: 0.5-1.5: 0.1-0.5. Specifically, the pH value of the silicone-acrylic emulsion is 9-11, the formed anionic surfactant polyacrylamide can assist dispersion, and the hollow tin antimony oxide can be uniformly dispersed in the coating without large-range agglomeration.

In some embodiments of the present invention, preferably, the silicone acrylic is a copolymer of a silicone monomer and an acrylic monomer, wherein the silicone monomer is selected from at least one of vinyltrimethoxysilane, vinyltriethoxysilane, propenyltrimethoxysilane, and gamma-methacryloxypropyltrimethoxysilane. It should be noted that the source of the silicone acrylic acid in the present invention is not limited, and the silicone acrylic acid can be obtained commercially or prepared by methods described in the prior art, and will not be described herein again.

In some embodiments of the present invention, preferably, in step (3), the solvent is selected from water and/or ethanol. More preferably, the solvent is water.

In some embodiments of the present invention, preferably, in step (3), the dispersant is selected from sodium tripolyphosphate and/or sodium hexametaphosphate; more preferably, the dispersant is sodium hexametaphosphate.

In some embodiments of the present invention, preferably, in step (3), the thickener is selected from hydroxyethylcellulose and/or starch; more preferably, the thickener is hydroxyethyl cellulose.

In some embodiments of the present invention, preferably, in step (3), the defoamer is selected from a general-purpose aqueous defoamer and/or a silicone defoamer; more preferably, the defoamer is a universal aqueous defoamer. Commercially available, for example SERDAS 7005.

In some embodiments of the present invention, preferably, in step (3), the coalescent is selected from propylene glycol butyl ether and/or ethylene glycol; more preferably, the coalescing agent is ethylene glycol.

In some embodiments of the present invention, preferably, in step (3), the pH adjusting agent is selected from ammonia and/or sodium hydroxide solution; more preferably, the pH adjuster is ammonia water.

In some embodiments of the present invention, preferably, in step (3), the mixing time is 20-24 h.

In some embodiments of the present invention, to prepare a coating material with excellent light and heat insulation properties, preferably, in step (4), the mass ratio of the hollow tin antimony oxide, aerogel and the silicone acrylic emulsion may be 0.2-2.4: 0.1-2.4: 100, respectively; preferably 0.6-2:0.6-2: 100.

In some embodiments of the present invention, the aerogel may be a substance possessing extremely high porosity and thermal conductivity, preferably, the aerogel is selected from silica aerogel and/or titania aerogel. More preferably, the aerogel is silica aerogel, the porosity of the silica aerogel is not less than 80%, and the thermal conductivity is 0.015-0.03W/(m.K).

In a third aspect of the invention, a coating is provided, which is prepared by the above method.

In a fourth aspect of the present invention, there is provided an energy saving material comprising: the coating comprises a base material and a coating on the surface of the base material, wherein the coating is prepared by adopting the coating.

In some embodiments of the present invention, the thickness of the coating layer may be 20 to 40 μm in order to secure the light-and heat-blocking effect of the energy-saving material.

In some embodiments of the present invention, there is no limitation on the thickness of the substrate, and the thickness of the substrate may be 2 to 5 mm.

In some embodiments of the present invention, preferably, the substrate may be a transparent material selected from at least one of glass, epoxy, and polyurethane, preferably glass, or a cement board.

A transparent energy saving material, the transparent energy saving material comprising: the coating comprises a base material and a coating on the surface of the base material, wherein the coating is prepared by adopting the coating. The transparent energy-saving material has good light and heat insulation effects. Specifically, the coating layer doped with 1.6 wt% of the powder has a transmittance of 80% or more in the visible region and 50% or less in the infrared region.

In a fifth aspect of the present invention, there is provided a method for preparing an energy saving material, the method comprising: and (3) coating the coating on the surface of a base material, and drying to obtain the energy-saving material containing the coating.

In some embodiments of the present invention, the conditions for drying after the above coating is coated on the surface of the substrate are not limited, and the drying may be performed by air drying or drying in a drying device, preferably, the drying temperature is 50-100 ℃, and the drying time is 20-24 h.

The present invention will be described in detail below by way of examples.