CN114790350A - Water-based radiation cooling coating and preparation method and application thereof - Google Patents

Water-based radiation cooling coating and preparation method and application thereof Download PDF

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CN114790350A
CN114790350A CN202210608238.7A CN202210608238A CN114790350A CN 114790350 A CN114790350 A CN 114790350A CN 202210608238 A CN202210608238 A CN 202210608238A CN 114790350 A CN114790350 A CN 114790350A
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coating
parts
radiation cooling
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刘晓芳
何英杰
曾一鹿
孙华君
岳婉婷
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Wuhan University of Technology WUT
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
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Abstract

The invention discloses a water-based radiation cooling coating and a preparation method and application thereof. The water-based radiation cooling coating is prepared from the following components in parts by mass: 10-25 parts of water-based film-forming resin with infrared radiation, 35-42 parts of sunlight reflecting material, 1-9 parts of auxiliary agent and 30-42 parts of water. The water-based radiation cooling coating is prepared into a coating and then dried to form a plurality of micro-gaps, and the air-resin, air-filler and resin-filler multi-interfaces are generated in cooperation with the sunlight reflecting material, so that the light transmission path is shortened, the light scattering effect is enhanced, the temperature of the back of the coating can be lower than the ambient temperature by about 5 ℃, and the water-based radiation cooling coating has a relatively obvious cooling effect. In addition, the coating has good high temperature resistance and aging resistance, is suitable for the outer wall surfaces of occasions such as residential buildings, commercial buildings, industrial plants and the like, and has wide application prospect.

Description

Water-based radiation cooling coating and preparation method and application thereof
Technical Field
The invention belongs to the field of energy-saving coatings, and particularly relates to a water-based radiation cooling coating, and a preparation method and application thereof.
Background
Radiation Cooling (RC), as a passive cooling method, is a method with great potential. Unlike active cooling, which requires power consumption, radiant cooling emits thermal radiation through an atmospheric transparent window to the outer space (3k) without consuming any energy. It achieves the purposes of reducing carbon emission and protecting the environment, and has great application value. Various radiant coolers have been developed up to now: the multi-layer radiation cooling structure requires high production costs and complicated process design. Polymeric films such as PDMS, PMMA, PVF, PEO, etc. typically have high emissivity of 0.95 due to the inherent absorption of functional groups. However, due to the demand for low VOCs, polymer coatings are not environmentally friendly, and such coatings often require a further layer of metal plating material, which is expensive.
The radiation cooler researched and prepared by Bao et al in the prior art: the top layer is titanium dioxide, and the bottom layer is silicon dioxide or silicon carbide. The upper layer is used for reflecting sunlight. Because the inherent ultraviolet absorption of titanium dioxide, the reflectivity can only reach 90.7 percent, the large-amplitude cooling cannot be realized, and the ultraviolet absorption of the coating is easy to age, so that the radiation cooling effect cannot be maintained for a long time. The radiant cooler developed by Liu et al is also a double-layer structure, the upper layer uses transparent epoxy resin to achieve high emissivity, and the lower layer needs to be added with a metallic silver layer to reflect sunlight, so that the cost is increased, and the field process is complex. In addition, the reflectivity of the existing coating cannot reach more than 90%, and the heat inside the coating cannot be released, so that the temperature of the coating can be reduced after the coating is covered, but the indoor temperature of the coating can be stored, and the temperature cannot be reduced to be lower than the ambient temperature.
Therefore, the problem to be solved in the industry at present is to find an exterior wall coating which is simple to prepare, low in cost and capable of being cooled to sub-ambient temperature.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a water-based radiation cooling coating and a preparation method and application thereof.
The purpose of the invention is realized by the following technical scheme:
the water-based radiation cooling coating is prepared from the following components in parts by mass: 10-25 parts of water-based film-forming resin with infrared radiation, 35-42 parts of sunlight reflecting material, 1-9 parts of auxiliary agent and 30-42 parts of water.
Preferably, the water-based radiation cooling coating is prepared from the following components in parts by mass: 10-21 parts of an infrared radiation water-based film-forming resin, 36-41 parts of a sunlight reflecting material, 6-9 parts of an auxiliary agent and 36-42 parts of water.
Preferably, the aqueous film-forming resin with infrared radiation is at least one of aqueous acrylic resin, aqueous fluorocarbon resin, aqueous epoxy resin, aqueous styrene-butadiene rubber emulsion, aqueous silicone resin and aqueous polyurethane resin.
Preferably, the solar light reflective material is at least one of zirconium dioxide, barium sulfate, calcium carbonate, silicon dioxide, hollow zirconium dioxide, zirconium dioxide-coated cenospheres, hollow barium sulfate, hollow calcium carbonate and hollow silicon dioxide.
Preferably, the auxiliary agent is at least one of a dispersant, a wetting agent, a defoaming agent, a thickener, an anti-flash rust agent, a film-forming auxiliary agent and a curing agent.
Preferably, the defoaming agent is NXZ defoaming agent manufactured by Shandong Yousio chemical technology Co.
Preferably, the wetting agent is a wetting agent manufactured by Shanghai Huizhong technology group with model number QY 934.
Preferably, the dispersant is model 5050 manufactured by Shandong Youso chemical technology, Inc.
Preferably, the film forming agent is an alcohol ester twelve produced by Nanjing Cutian chemical Co.
The preparation method of the water-based radiation cooling coating comprises the following steps:
(1) firstly, mixing and uniformly dispersing water and 70-90 wt% of an auxiliary agent, then adding an aqueous film-forming resin with infrared radiation, and stirring to obtain a slurry;
(2) and (2) adding a sunlight reflecting material into the slurry obtained in the step (1), uniformly stirring, adding the rest of the auxiliary agent, uniformly stirring, and finally sieving to obtain the water-based radiation cooling coating.
Preferably, the mode of mixing and uniformly dispersing the water and 70-90 wt% of the auxiliary agent in the step (1) is as follows: adding the mixture into a dispersion machine, and stirring for 5-10 min at a linear speed of 5-10 m/s.
Preferably, the aqueous film-forming resin with infrared radiation is added in the step (1), and the mixture is stirred for 30-100 min at a linear speed of 5-10 m/s to obtain the slurry.
Preferably, after the sunlight reflecting material is added in the step (2), stirring is carried out at a linear speed of 5-10 m/s for 30-100 min.
Preferably, after the rest of the auxiliary agent is added in the step (2), stirring is carried out for 5-10 min at a linear speed of 5-10 m/s.
Preferably, the mesh number of the screen in the step (2) is 100-800 meshes.
The application of the water-based radiation cooling coating in preparing exterior wall finish for residential buildings, commercial buildings and industrial plants.
Preferably, the application comprises the following steps: and (3) coating the water-based radiation cooling coating on the outer wall surface, wherein the coating thickness is 200-500 mu m, and drying at normal temperature.
Preferably, drying is carried out for 1-3 h at normal temperature, the surface of the coating is dried for 18-30 h, and the coating is dried completely.
Preferably, the coating is performed by at least one of brushing, spraying and rolling.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention takes the water-based resin as a film forming substance and water as a solvent, thereby reducing the environmental pollution. By adding the solar reflective material, the micro voids are introduced after the solvent is evaporated to form a dry film. The gaps cooperate with the sunlight reflecting material to generate multiple interfaces of air-resin, air-filler and resin-filler, so that the transmission path of light is shortened, the scattering effect of light is enhanced, and ultrahigh sunlight reflectivity is generated. Due to the vibration of the chemical bond of the resin in the atmospheric transparent window, the coating can also achieve ultrahigh emissivity in an infrared region.
(2) The sunlight reflecting material selected by the invention is a wide-band gap material, and is filled in a large amount of resin, so that the ultraviolet aging resistance of the coating is enhanced, the ultraviolet resistance of the coating is good, and meanwhile, the excellent performance of the aqueous fluorocarbon resin is combined, so that the aqueous radiation cooling coating has good weather resistance, and the long-term radiation cooling effect can be realized.
(3) The invention has the advantages of ultrahigh reflectivity and emissivity, simple process, low cost, suitability for special-shaped and plane substrates and wide application prospect.
Drawings
FIG. 1 is a graph of the back temperature and ambient temperature of 4 tinplate blocks over time.
FIG. 2 is a graph of the surface temperature versus time for each coating in a simulated small house test of a comparative commercial coating.
FIG. 3 is a graph of the inside temperature versus time of a log cabin for each coating in a comparative commercial coating simulation small house test.
FIG. 4 is a graph of the gloss of sample 1 as a function of time for a UV weathering test of the coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A preparation method of a water-based radiation cooling coating comprises the following steps:
adding 40 parts by weight of deionized water into a dispersion machine, adding 1.5 parts of defoaming agent (purchased from Shandong Youyo chemical engineering Co., Ltd., NXZ), 1.5 parts of wetting agent (purchased from Shanghai Hui Zhong science and technology group, QY934), 2 parts of dispersing agent (purchased from Shandong Youyo chemical engineering Co., Ltd., 5050) at a linear speed of 5m/s, and stirring for 5 min. 13 parts of aqueous fluorocarbon resin (WF-FM 261, available from Wanbo New materials science and technology Co., Ltd.) was added at a line speed of 10m/s and stirred for 60min to form a slurry. 10 parts of zirconium dioxide (purchased from Shanghai Michelin Biochemical technology, Inc.) with the particle size of 200nm, 20 parts of zirconium dioxide (purchased from Shanghai Huihu chemical industry, Inc.) with the particle size of 500nm and 10 parts of zirconium dioxide (purchased from Shanghai Michelin Biochemical technology, Inc.) with the particle size of 1-2 μm are added at the linear speed of 20m/s and mixed and dispersed for 100 min. After uniform dispersion, the speed is adjusted to 5m/s, 2 parts of film-forming agent (purchased from Nanjing Cutian chemical Co., Ltd., alcohol ester twelve) are added, stirred for 5min and filtered by a 400-mesh screen to obtain the water-based radiation cooling coating.
Example 2
A preparation method of a water-based radiation cooling coating comprises the following steps:
36.8 parts by weight of deionized water was added to a dispersion machine, and 1.2 parts of a defoaming agent (available from Shandong Youso chemical technology Co., Ltd., NXZ), 1.2 parts of a wetting agent (available from Shanghai Hui Mass. science and technology Co., Ltd., QY934), and 1.8 parts of a dispersing agent (available from Shandong Youso chemical technology Co., Ltd., 5050) were added at a line speed of 5m/s and stirred for 5 min. 21 parts of aqueous fluorocarbon resin (WF-FM 261, available from Wanbo New materials science and technology Co., Ltd.) was added at a line speed of 10m/s and stirred for 60min to form a slurry. 36 parts of calcium carbonate (available from Shanghai Huichi chemical Co., Ltd.) were added at a line speed of 20m/s and dispersed for 100 min. After uniform dispersion, the speed is adjusted to 5m/s, 1.8 parts of film-forming agent (purchased from Nanjing Cutian chemical Co., Ltd., alcohol ester twelve) is added, stirred for 5min and filtered by a 400-mesh screen to obtain the water-based radiation cooling coating.
Example 3
A preparation method of a water-based radiation cooling coating comprises the following steps:
39.6 parts by weight of deionized water was added to a dispersion machine, and 1.3 parts of a defoaming agent (available from Shandong Youso chemical technology Co., Ltd., NXZ), 1.3 parts of a wetting agent (available from Shanghai Hui Mass. science and technology Co., Ltd., QY934), and 1.9 parts of a dispersing agent (available from Shandong Youso chemical technology Co., Ltd., 5050) were added at a linear speed of 5m/s and stirred for 3 min. 15.1 parts of aqueous fluorocarbon resin (WF-FM 261 available from Wanbo New materials science and technology Co., Ltd.) was added at a line speed of 10m/s and stirred for 60min to form a slurry. 36 parts of barium sulfate (available from Shanghai Kagaku Kogyo Co., Ltd.) was added at a linear velocity of 20m/s and dispersed for 100 min. After uniform dispersion, the speed is adjusted to 5m/s, 1.5 parts of film-forming agent (purchased from Nanjing Cutian chemical Co., Ltd., alcohol ester twelve) is added, stirred for 5min and filtered by a 400-mesh screen to obtain the water-based radiation cooling coating.
Example 4
A preparation method of a water-based radiation cooling coating comprises the following steps:
41.7 parts by weight of deionized water was added to a dispersion machine, and 1.8 parts of a defoaming agent (available from Shandong Youso chemical technology Co., Ltd., NXZ), 1.8 parts of a wetting agent (available from Shanghai Hui Mass. science and technology Co., Ltd., QY934), and 2.7 parts of a dispersing agent (available from Shandong Youso chemical technology Co., Ltd., 5050) were added at a linear speed of 5m/s and stirred for 5 min. 10.6 parts of aqueous fluorocarbon resin (WF-FM 261 available from Wanbo New materials science and technology Co., Ltd.) was added at a line speed of 10m/s and stirred for 30min to form a slurry. 40.7 parts of zirconium dioxide (commercially available from Shanghai Hu chemical Co., Ltd.) having a particle size of 500nm was added at a linear velocity of 20m/s and dispersed for 100 min. After the dispersion is uniform, the speed is adjusted to be 5m/s, 2.7 parts of film forming agent (purchased from Nanjing Gutian chemical Co., Ltd., alcohol ester twelve) is added, the mixture is stirred for 5min, and then the mixture is filtered by a 400-mesh screen to obtain the water-based radiation cooling coating.
Comparative example 1
A preparation method of a cooling coating comprises the following steps:
adding 40 parts by weight of deionized water into a dispersion machine, adding 1.5 parts of defoaming agent (purchased from Shandong Youyo chemical engineering Co., Ltd., NXZ), 1.5 parts of wetting agent (purchased from Shanghai Hui Zhong science and technology group, QY934), 2 parts of dispersing agent (purchased from Shandong Youyo chemical engineering Co., Ltd., 5050) at a linear speed of 5m/s, and stirring for 5 min. 13 parts of aqueous fluorocarbon resin (WF-FM 261 available from Wanbo New materials science and technology Co., Ltd.) was added at a line speed of 10m/s and stirred for 60min to form a slurry. 40 parts of titanium dioxide (from Shanghai Allan Biotech Co., Ltd.) are added at a line speed of 20m/s and dispersed for 100 min. After the dispersion is uniform, the speed is adjusted to be 5m/s, 2 parts of film forming agent (purchased from Nanjing Gutian chemical Co., Ltd., alcohol ester twelve) is added, the mixture is stirred for 5min, and then the mixture is filtered by a 400-mesh screen to obtain the water-based radiation cooling coating.
Comparative example 2
A preparation method of a cooling coating comprises the following steps:
36.8 parts by weight of deionized water was added to a dispersion machine, and 1.2 parts of a defoaming agent (available from Shandong Youso chemical technology Co., Ltd., NXZ), 1.2 parts of a wetting agent (available from Shanghai Hui Mass. science and technology Co., Ltd., QY934), and 1.8 parts of a dispersing agent (available from Shandong Youso chemical technology Co., Ltd., 5050) were added at a line speed of 5m/s and stirred for 5 min. 21 parts of aqueous fluorocarbon resin (WF-FM 261, available from Wanbo New materials science and technology Co., Ltd.) was added at a line speed of 10m/s and stirred for 60min to form a slurry. 30 parts of zirconium dioxide (available from Shanghai Huichi chemical Co., Ltd.) are added at a line speed of 20m/s and dispersed for 100 min. After uniform dispersion, the speed is adjusted to 5m/s, 1.8 parts of film-forming agent (purchased from Nanjing Cutian chemical Co., Ltd., alcohol ester twelve) is added, stirred for 5min and filtered by a 400-mesh screen to obtain the water-based radiation cooling coating.
And (3) performance testing:
the cooling coatings prepared in examples 1 to 4 and comparative examples 1 to 2 were applied to a substrate (the substrate was one of a tinplate, an aluminum sheet, a glass sheet, cement, wood and a PTFE plate, and the tinplate was used in this test), the thickness of the coating was 300 μm, and the coating was naturally dried at room temperature, surface-dried after 2 hours, and dried after 24 hours to obtain sample 1, sample 2, sample 3, sample 4, comparative sample 1 and comparative sample 2, respectively.
The aqueous radiation cooling coating prepared in example 1 was coated on a substrate to obtain a coating layer with a thickness of 100 μm, 200 μm, 400 μm and 500 μm, and the coating layer was naturally dried at room temperature, surface-dried after 2 hours and dried after 24 hours to obtain sample a, sample B, sample C and sample D, respectively.
(1) Testing the solar reflectance: each sample was put into a UV/VIS/NIR Spectrometer of Lambda 750S type (Perkinelmer Co.), and the reflectance of the sample in a wavelength band of 200 to 2500nm was measured with a bandwidth (resolution) of 2 nm. Taking the average value of the reflectivity of the sample in the wave band of 300-2500 nm as the reflectivity of sunlight, and the test result is shown in table 1;
(2) testing the infrared emissivity: putting each sample into a Nexus intelligent Fourier transform infrared spectrometer (Therno Nicolet company), wherein the measuring wave beam range is 400-4000 cm -1 Resolution of 2cm -1 The test sample is 400-4000 cm -1 Reflectance and transmittance of (2). 400-4000 cm -1 The emissivity of the sample in the beam is measured by 1-reflectivity-transmissivity, and the average value is taken as the infrared broadband emissivity, and the test result is shown in table 1.
TABLE 1
Figure BDA0003672296700000061
As can be seen from table 1: the embodiments 1, 2 and 3 all adopt materials with wide band gaps, the absorption peak is not in the wave band of 0.3-2.5 μm, and the materials have higher refractive index. The coating generates micro-voids after film forming through high filler volume fraction, and generates multiple interfaces of air-resin, air-filler and resin-filler in cooperation with a sunlight reflecting material, so that the light transmission path is shortened, the light scattering effect is enhanced, and the prepared water-based radiation cooling coating with high filler volume fraction has high sunlight reflectivity and infrared broadband emissivity. Comparing example 1 and example 4, it can be seen that both use zirconium dioxide of different particle sizes from different companies as filler, but only a slight difference in reflectivity of the obtained coating was observed, and it was concluded that: the coating does not need strict particle size requirements, and the universality of the coating is enlarged. The filler used in comparative example 1 was titanium dioxide, which is difficult to achieve high reflectivity due to its uv absorption, which accelerated coating aging and shortened the time to effective application of the coating. Example 4 and comparative example 2 are high and low concentrations of zirconium dioxide as filler, respectively, and the reflectivity of the coatings are obviously different, which illustrates that the reflection effect of the coatings can be obviously enhanced by high filler concentration. Analysis of samples 1 and a to D revealed that the coating thickness of the coating material is also related to the achievement of an ultra-high solar reflectance. Too thin a coating allows sunlight to transmit through the coating, thereby reducing the coating reflectivity. Therefore, it is preferable to apply the coating layer so that the thickness thereof becomes 300. mu.m.
(3) And (3) outdoor temperature testing: to eliminate contingencies, the paint prepared in example 1 was applied to 4 pieces of tinplate 120 × 25 × 0.28 size with a paint thickness of 300 μm, the tinplate pieces coated with the paint were placed on a ceiling and placed on foam, the test was started at the highest solar light intensity at noon using a jk808 hand-held temperature tester, and the temperature of the back side (side not coated with paint) and the ambient temperature were measured as a function of time, as shown in fig. 1.
As can be seen from fig. 1, the back temperature of the 4 tinplate coatings can be reduced to about 5 ℃ lower than the ambient temperature, because of the ultra-high volume concentration of the filler, water is used as a solvent, when water is evaporated to form a film, a plurality of micro-voids are formed, and the micro-voids cooperate with the sunlight reflecting material to generate a plurality of interfaces of air-resin, air-filler and resin-filler, thereby shortening the transmission path of light and enhancing the light scattering effect. The scattering among multiple interfaces is utilized to generate ultrahigh solar reflectivity and infrared emissivity. The paint has obvious cooling effect.
(4) Comparative commercial coating simulation small house testing: the aqueous radiant cooling coating prepared in example 1 was roll-coated to a thickness of 300 μm on a log cabin, the coating prepared in comparative example 1 was roll-coated to a thickness of 300 μm on another same log cabin, meanwhile, a commercial Nippon white paint coating is coated on another same wooden house by a roller according to the thickness of 300 mu m, the temperature of the surface of each coating and the temperature of the interior of the wooden house are respectively tested by a thermocouple, points 1, 2 and 3 respectively correspond to the temperature of the surface of the coating of the example 1, the surface of the commercial Nippon white paint and the temperature of the surface of the coating of the comparative example 1, points 4, 5 and 6 respectively correspond to the temperature of the interior of the wooden house of the coating of the example 1, the interior of the commercial Nippon white paint and the temperature of the interior of the wooden house of the coating of the comparative example 1, and the relevant test results are shown in figures 2 to 3, fig. 2 is a graph showing a change in the surface temperature of each paint over time, and fig. 3 is a graph showing a change in the interior temperature of each paint over time.
As can be seen from FIGS. 2 to 3: the surface temperature of the commercial Nippon white paint coating was slightly higher than the corresponding coating of example 1 (point 2 over point 1), while the surface temperature of the coating of comparative example 1 was significantly higher than the other two coatings (point 3 over points 1 and 2). By comparing the internal temperatures of the log houses, the temperature at the 4 th point was lower than the temperatures at the 5 th point and the 6 th point by 2.3 ℃ and 2.8 ℃ on average, respectively. This shows that the water-based radiation cooling coating prepared by the invention has excellent cooling effect.
(5) Ultraviolet aging resistance test of the coating: the sample 1 was put into an ultraviolet aging oven (Shanghai modern environmental engineering technology Co., Ltd., model LUV-2) to perform an ultraviolet aging resistance test, and the gloss of the coating was recorded every 24 hours as shown in FIG. 4.
As can be seen from fig. 4: the initial glossiness of the coating is 3.4, and after 15 days of ultraviolet irradiation, the glossiness of the coating still keeps about 3.4. The ultraviolet-resistant filler is filled in the resin, so that the aging effect of ultraviolet light on the resin is weakened, the paint can keep luster and is not yellowed, and the long-term effect of high solar reflectance of the coating is ensured.
The invention utilizes the water-based film-forming resin with high infrared radiation, combines ultrahigh filler concentration, takes water as a solvent, forms a plurality of micro-gaps after water is evaporated to form a film, and generates a plurality of interfaces of air-resin, air-filler and resin-filler in cooperation with the sunlight reflecting material, thereby shortening the transmission path of light and enhancing the scattering effect of light. And the scattering among multiple interfaces is utilized to generate ultrahigh solar reflectivity and infrared emissivity. The coating can greatly reduce the temperature of the back surface, can reduce the temperature to be lower than the ambient temperature, and has obvious cooling effect. And because a plurality of anti-ultraviolet materials are filled in the resin, the anti-ultraviolet aging capability of the coating is enhanced, so that the coating can be used for a long time. The invention has simple process and low cost, can be applied to the outer wall of building materials as finish paint, can reduce the internal temperature below the environmental temperature, has obvious cooling effect, replaces refrigeration equipment to reduce energy consumption, and is comfortable for human life. The method is suitable for special shapes and planes, is suitable for occasions such as residential buildings, commercial buildings, industrial plants and the like, and has wide application prospects.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The water-based radiation cooling coating is characterized by being prepared from the following components in parts by mass: 10-25 parts of water-based film-forming resin with infrared radiation, 35-42 parts of sunlight reflecting material, 1-9 parts of auxiliary agent and 30-42 parts of water.
2. The water-based radiation cooling coating as claimed in claim 1, which is prepared from the following components in parts by mass: 10-21 parts of an infrared radiation water-based film-forming resin, 36-41 parts of a sunlight reflecting material, 6-9 parts of an auxiliary agent and 36-42 parts of water.
3. The aqueous radiation cooling coating material according to any one of claims 1 to 2, wherein the aqueous film-forming resin with infrared radiation is at least one of aqueous acrylic resin, aqueous fluorocarbon resin, aqueous epoxy resin, aqueous styrene butadiene rubber emulsion, aqueous silicone resin and aqueous polyurethane resin.
4. The aqueous radiation cooling coating of claim 3, wherein the solar reflective material is at least one of zirconium dioxide, barium sulfate, calcium carbonate, silicon dioxide, hollow zirconium dioxide, zirconium dioxide-coated hollow microspheres, hollow barium sulfate, hollow calcium carbonate and hollow silicon dioxide;
the auxiliary agent is at least one of a dispersing agent, a wetting agent, a defoaming agent, a thickening agent, an anti-flash rust agent, a film-forming auxiliary agent and a curing agent.
5. The preparation method of the water-based radiation cooling coating as claimed in any one of claims 1 to 4, characterized by comprising the following steps:
(1) firstly, mixing and uniformly dispersing water and 70-90 wt% of an auxiliary agent, then adding an aqueous film-forming resin with infrared radiation, and stirring to obtain a slurry;
(2) and (2) adding a sunlight reflecting material into the slurry obtained in the step (1), uniformly stirring, adding the rest of the auxiliary agent, uniformly stirring, and finally sieving to obtain the water-based radiation cooling coating.
6. The preparation method of the water-based radiation cooling coating as claimed in claim 5, wherein the water in the step (1) and 70-90 wt% of the auxiliary agent are mixed and uniformly dispersed in the following manner: adding the mixture into a dispersion machine, and stirring for 5-10 min at a linear speed of 5-10 m/s;
and (2) adding the water-based film-forming resin with infrared radiation in the step (1), and stirring at a linear speed of 5-10 m/s for 30-100 min to obtain the slurry.
7. The preparation method of the water-based radiation cooling coating according to claim 5 or 6, wherein the step (2) is carried out at a linear speed of 5-10 m/s for stirring for 30-100 min after the sunlight reflecting material is added;
after the rest of the auxiliary agent is added in the step (2), stirring for 5-10 min at a linear speed of 5-10 m/s;
the mesh number of the sieving in the step (2) is 100-800 meshes.
8. Use of the aqueous radiation cooling coating of any one of claims 1 to 4 for preparing exterior wall finishes for residential buildings, commercial buildings and industrial plants.
9. Use according to claim 8, characterized in that it comprises the following steps: and (3) coating the water-based radiation cooling coating on the outer wall surface, wherein the coating thickness is 200-500 mu m, and drying at normal temperature.
10. The application of the paint as claimed in claim 9, wherein the paint is dried for 1-3 h at normal temperature, the surface of the coating is dry, the paint is dried for 18-30 h, and the coating is dried completely; the coating mode is at least one of brushing, spraying and rolling.
CN202210608238.7A 2022-05-31 2022-05-31 Water-based radiation cooling coating and preparation method and application thereof Pending CN114790350A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115449252A (en) * 2022-07-29 2022-12-09 福建省三棵树新材料有限公司 Radiation refrigeration coating and preparation method thereof
CN115651470A (en) * 2022-12-14 2023-01-31 中国建筑西南设计研究院有限公司 Grey passive radiation refrigeration material, preparation method and application
CN115772351A (en) * 2022-12-14 2023-03-10 中国建筑西南设计研究院有限公司 Passive radiation refrigeration material, preparation method and application
CN116410634A (en) * 2023-04-19 2023-07-11 石家庄市长安育才建材有限公司 High solar reflectance radiation refrigeration paint and preparation method and application thereof

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CN109942865A (en) * 2019-03-29 2019-06-28 杭州瑞酷新材料有限公司 A kind of preparation method of radiation cooling film

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CN109942865A (en) * 2019-03-29 2019-06-28 杭州瑞酷新材料有限公司 A kind of preparation method of radiation cooling film

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115449252A (en) * 2022-07-29 2022-12-09 福建省三棵树新材料有限公司 Radiation refrigeration coating and preparation method thereof
CN115449252B (en) * 2022-07-29 2024-01-09 福建省三棵树新材料有限公司 Radiation refrigeration coating and preparation method thereof
CN115651470A (en) * 2022-12-14 2023-01-31 中国建筑西南设计研究院有限公司 Grey passive radiation refrigeration material, preparation method and application
CN115772351A (en) * 2022-12-14 2023-03-10 中国建筑西南设计研究院有限公司 Passive radiation refrigeration material, preparation method and application
CN115772351B (en) * 2022-12-14 2024-02-06 中国建筑西南设计研究院有限公司 Passive radiation refrigerating material, preparation method and application
CN116410634A (en) * 2023-04-19 2023-07-11 石家庄市长安育才建材有限公司 High solar reflectance radiation refrigeration paint and preparation method and application thereof

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Application publication date: 20220726