CN113930104A - Radiation refrigeration composite membrane and preparation method and application thereof - Google Patents
Radiation refrigeration composite membrane and preparation method and application thereof Download PDFInfo
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09J7/00—Adhesives in the form of films or foils
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
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- C09J2400/00—Presence of inorganic and organic materials
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Abstract
The invention provides a radiation refrigeration composite membrane and a preparation method and application thereof, wherein the radiation refrigeration composite membrane comprises a substrate and a functional layer; the functional layer is prepared from the raw materials of 20-50 parts by weight of polymer emulsion and 30-55 parts by weight of radiation refrigeration filler; the substrate comprises a metal foil or a metal tape; the radiation refrigeration filler is selected to be matched with the polymer emulsion as a preparation raw material of the functional layer, so that the surface of the radiation refrigeration composite film has higher solar reflectivity and higher infrared radiance, and the radiation refrigeration composite film has excellent refrigeration effect; and the base material is matched, so that the radiation refrigeration composite membrane has higher mechanical performance, and is suitable for being applied to various buildings.
Description
Technical Field
The invention belongs to the technical field of composite membranes, and particularly relates to a radiation refrigeration composite membrane and a preparation method and application thereof.
Background
Radiation refrigeration refers to a novel refrigeration technology for transmitting heat of a heat source to an outer space cold source through an atmospheric window of infrared radiation (since the atmospheric layer has high transmittance for heat radiation in a wavelength range of 8-13 μm, the average transmittance is 85%, and the wave band is called as the atmospheric window). While traditional refrigeration techniques typically consume energy and resources to remove heat, radiation refrigeration techniques are passive enhancements that utilize the earth's natural refrigeration. The radiation refrigeration has the advantages of zero energy consumption, zero pollution, no moving parts and the like, has positive significance for cooling energy conservation and environmental protection, and can be applied to the fields of building energy conservation, automobiles, solar cell cooling, outdoor equipment heat dissipation, outdoor equipment cooling, agricultural greenhouses, tents, umbrellas, textiles and the like.
The radiation refrigeration products provided in the prior art generally comprise two main types of coatings and films. CN109135599A discloses a reflection-type radiation refrigeration film, which comprises a coating layer, a metal layer, a transparent polyester PET layer, a glue filling and a release protective film which are sequentially arranged, wherein the coating layer comprises an organic acrylic coating and a micron sphere, and the micron sphere is one of SiC, SiO, TiO, BaSO and CaCO; the metal layer is deposited on the transparent polyester PET layer by a magnetron sputtering method; the ratio of the thickness of each layer to the total thickness of the radiation refrigeration film is as follows: coating layer: 2-10%, metal layer: 0.01-0.1%, transparent polyester PET: 14.9-87.99%, and adhesive filling: 5-40%, release protective film: 5-35%, the invention is to inlay the micron sphere with the grain diameter of about 1-15 μm in the polymethyl methacrylate coating randomly to prepare the film with the thickness of 50-150 μm. CN110896639A discloses a radiation refrigeration functional coating and application thereof. The radiation refrigeration functional coating is used for preparing a radiation refrigeration functional layer, the radiation refrigeration functional layer is used for reflecting ultraviolet light and/or visible light and/or near infrared light in sunlight and emitting heat through an atmospheric window in an infrared radiation mode, the radiation refrigeration functional coating comprises a particle filler and radiation refrigeration functional resin, and the particle filler is distributed in the radiation refrigeration functional resin. CN112662250A discloses a white radiation refrigeration coating with a single-layer micropore structure, wherein the refrigeration coating comprises 35-45% of pure acrylic or styrene-acrylic emulsion by mass percentage; 20-28% of hollow glass beads, 10-15% of hollow ceramic beads, 3-5% of fumed silica, 1-35% of aerogel, 5-10% of water and 2-5% of an auxiliary agent. The refrigeration coating is white radiation refrigeration coating with an integrated bottom surface, does not adopt rutile titanium dioxide as a white pigment, and is lower than the ambient temperature under direct sunlight. The total solar reflectivity of the white radiation refrigeration coating obtained by the invention is above 0.95, the total infrared radiance of the coating surface is 0.92, and the infrared radiance of the atmospheric window is 0.96, so that the minimum requirement of radiation refrigeration lower than the ambient temperature under direct sunlight is fully met.
However, the radiation refrigeration coating provided in the prior art has low tensile strength and ductility, so that the refrigeration effect needs to be improved, and the coating workload is large, which is not beneficial to large-scale application; the film type radiation refrigeration products provided by the prior art have good mechanical properties and obvious refrigeration effect, but have complex process, harsh production conditions, complex equipment structure and large investment, and are not beneficial to large-scale industrial production.
Therefore, the development of a radiation refrigeration composite membrane with excellent refrigeration effect and simple process is a technical problem which needs to be solved urgently in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a radiation refrigeration composite film and a preparation method and application thereof, wherein the radiation refrigeration composite film comprises a base material and a functional layer, and the preparation raw material of the functional layer comprises a polymer emulsion and a radiation refrigeration filler in a specific part; through the structural design and the selection of the raw materials for preparing the functional layer, the radiation refrigeration composite membrane has high mechanical performance and excellent refrigeration effect, is simple in production process, and is very suitable for large-scale industrial production.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a radiation refrigeration composite membrane comprising a substrate and a functional layer;
the functional layer is prepared from the raw materials of 20-50 parts by weight of polymer emulsion and 30-55 parts by weight of radiation refrigeration filler;
the substrate comprises a metal foil or a metal tape.
The polymer emulsion may be 23 parts by weight, 26 parts by weight, 29 parts by weight, 33 parts by weight, 36 parts by weight, 39 parts by weight, 43 parts by weight, 46 parts by weight, or 49 parts by weight, and specific points therebetween, for brevity and clarity, are not exhaustive and are not intended to include specific points within the stated ranges.
The radiation refrigeration filler may be 32 parts by weight, 34 parts by weight, 36 parts by weight, 38 parts by weight, 40 parts by weight, 42 parts by weight, 44 parts by weight, 46 parts by weight, 48 parts by weight, 50 parts by weight, 52 parts by weight, or 54 parts by weight, and specific points therebetween are not exhaustive for the purpose of brevity and clarity, and the invention is not intended to be limited to the specific points included in the recited ranges.
The schematic cross-sectional structure of the radiation refrigeration composite membrane provided by the invention is shown in fig. 1, wherein 1 represents a substrate, and 2 represents a functional layer, and when the radiation refrigeration composite membrane is used, the substrate 1 is in contact with sunlight.
The preparation raw materials of the functional layer 2 of the radiation refrigeration composite film comprise a polymer emulsion and a radiation refrigeration filler in specific parts by weight, the radiation refrigeration filler is selected to be matched with the polymer emulsion as the preparation raw material of the functional layer, and the polymer emulsion is controlled to be 20-50 parts by weight and the radiation refrigeration filler is controlled to be 30-55 parts by weight, so that the surface of the radiation refrigeration composite film has high solar reflectivity and high infrared radiance, the radiation refrigeration composite film has no loss and strong reflection in a solar spectrum waveband, and the radiation refrigeration composite film has flexible vibration and phonon polarization of a molecular chain, and further has an excellent refrigeration effect; the functional layer is arranged on the base material, and meanwhile, the radiation refrigeration composite membrane is guaranteed to have high mechanical performance.
Preferably, the metal flakes comprise aluminum flakes, tin flakes or silver flakes.
Preferably, the substrate has a thickness of 25 to 100 μm, such as 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm or 90 μm, and the specific values therebetween are not exhaustive for the purpose of space and brevity.
Preferably, the functional layer has a thickness of 100 to 300 μm, such as 120 μm, 140 μm, 160 μm, 180 μm, 200 μm, 220 μm, 240 μm, 260 μm or 280 μm, and specific values therebetween, which are not exhaustive for the sake of brevity and clarity.
Preferably, the polymer emulsion comprises a styrene-acrylic emulsion or an acrylic emulsion.
Preferably, the radiation refrigeration filler comprises any one of or a combination of at least two of a silicon-containing inorganic compound, a titanium-containing inorganic compound, a calcium-containing inorganic compound, a zinc-containing inorganic compound or a magnesium-containing inorganic compound.
Preferably, the radiation refrigeration filler further comprises fluorescent powder.
Preferably, the raw materials for preparing the functional layer further comprise an auxiliary agent.
Preferably, the content of the auxiliary in the raw material for preparing the functional layer is 0.5 to 10 parts by weight, for example, 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight or 9 parts by weight, and specific values therebetween are not exhaustive, and the invention is not limited to the specific values included in the range for brevity.
Preferably, the auxiliary agent comprises any one of a surfactant, a dispersing agent, a defoaming agent, an anti-settling agent, a leveling agent or a coalescing auxiliary agent or a combination of at least two of the above.
Preferably, the surfactant comprises any one of ionic surfactant, non-ionic surfactant, amphoteric surfactant or compound surfactant or a combination of at least two of the surfactants.
Preferably, the dispersant includes any one or a combination of at least two of an anionic dispersant, a cationic dispersant, a non-ionic dispersant, an amphoteric dispersant, or a polymeric dispersant.
Preferably, the defoaming agent comprises any one of mineral oil defoaming agent, alcohol defoaming agent, fatty acid ester defoaming agent, amide defoaming agent, phosphate ester defoaming agent, silicone defoaming agent, polyether defoaming agent or polyether modified polysiloxane defoaming agent or the combination of at least two of the above.
Preferably, the anti-settling agent comprises any one or a combination of at least two of quartz powder, talcum powder, calcium carbonate powder, bentonite, diatomite, alumina powder or silica powder.
Preferably, the coalescing aid comprises any one of an alcohol coalescing aid, an alcohol ester coalescing aid, an alcohol ether coalescing aid or an alcohol ether ester coalescing aid or a combination of at least two thereof.
Preferably, the alcoholic coalescing aid comprises any one of benzyl alcohol, ethylene glycol, propylene glycol or hexylene glycol, or a combination of at least two thereof.
Preferably, the alcohol ester coalescing aid comprises a dodecanol ester.
Preferably, the alcohol ether-based coalescing aid comprises any one of ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, or propylene glycol butyl ether, or a combination of at least two thereof.
Preferably, the alcohol ether ester coalescing aid comprises butyl cellosolve acetate and/or ethyl 3-ethoxypropionate.
In a second aspect, the present invention provides a method for preparing a radiation refrigeration composite membrane according to the first aspect, the method comprising the following steps:
(1) mixing the polymer emulsion, the radiation refrigeration filler and an optional auxiliary agent to obtain mixed slurry;
(2) and (2) coating the mixed slurry obtained in the step (1) on the surface of a base material, and curing to obtain the radiation refrigeration composite membrane.
The preparation method of the radiation refrigeration composite membrane provided by the invention is simple to operate, requires fewer equipment and instruments, and is very suitable for large-scale industrial production and application.
Preferably, the mixing in step (1) is performed under stirring conditions, preferably at a rotation speed of 500 to 1500rpm (e.g., 600rpm, 700rpm, 800rpm, 900rpm, 1000rpm, 1100rpm, 1200rpm, 1300rpm, 1400rpm, etc.).
Preferably, the temperature of the mixing in the step (1) is 15-30 ℃, for example, 17 ℃, 19 ℃, 21 ℃, 23 ℃, 25 ℃, 27 ℃ or 29 ℃, and the specific values therebetween are limited by space and for the sake of brevity, and the invention is not intended to be exhaustive of the specific values included in the range.
Preferably, the mixing time in step (1) is 20-60 min, such as 25min, 30min, 35min, 40min, 45min, 50min or 55min, and the specific values therebetween are limited by space and for brevity, the invention is not exhaustive of the specific values included in the range.
Preferably, the step (1) further comprises a step of vacuumizing for defoaming after mixing.
Preferably, the curing temperature in the step (2) is 20-40 ℃, for example, 22 ℃, 24 ℃, 26 ℃, 28 ℃, 30 ℃, 32 ℃, 34 ℃, 36 ℃ or 38 ℃, and the specific values therebetween are limited by space and for the sake of brevity, and the invention is not exhaustive of the specific values included in the range.
As a preferred technical scheme, the preparation method comprises the following steps:
(1) mixing the polymer emulsion, the radiation refrigeration filler and an optional auxiliary agent at 15-30 ℃ for 20-60 min, and vacuumizing for defoaming to obtain mixed slurry;
(2) and (2) coating the mixed slurry obtained in the step (1) on the surface of a base material, and curing at 20-40 ℃ to obtain the radiation refrigeration composite membrane.
In a third aspect, the present invention provides a use of a radiation refrigeration composite membrane according to the first aspect in construction.
Compared with the prior art, the invention has the following beneficial effects:
the radiation refrigeration composite membrane provided by the invention comprises a substrate and a functional layer; the preparation raw materials of the functional layer comprise polymer emulsion and radiation refrigeration filler in specific parts; the substrate comprises a metal foil or a metal tape; by selecting the polymer emulsion and the radiation refrigeration filler in specific parts as the preparation raw materials of the functional layer and matching the base material, the radiation refrigeration composite film has excellent radiation refrigeration effect, and the test of the cooling effect is-5.1 to-8.7 ℃; the reflectivity of sunlight (300-2500 nm) is 85.6-92.3%; the emissivity of an atmospheric window (8-13 mu m) is 81.5-90.3%; meanwhile, the radiation refrigeration composite membrane has excellent mechanical properties; and the preparation process of the radiation refrigeration composite membrane is simple, the requirement on equipment is low, and the radiation refrigeration composite membrane is further very suitable for large-scale industrial production and application.
Drawings
FIG. 1 is a schematic cross-sectional structure diagram of a composite film for radiation refrigeration provided by the present invention,
wherein, 1-substrate and 2-functional layer.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
A radiation refrigeration composite membrane, the radiation refrigeration composite membrane includes a substrate and a functional layer;
the base material is a smooth aluminum foil adhesive tape with the thickness of 60 mu m;
the thickness of the functional layer is 200 μm, and the preparation raw materials comprise the following components in parts by weight:
the preparation method of the radiation refrigeration composite membrane comprises the following steps:
(1) mixing styrene-acrylic emulsion (with solid content of 46-48%), titanium dioxide, 5 glass beads (solid with the diameter of 5-100 μm), fluorescent powder, deionized water, a wetting agent (Jinan Qingchun chemical industry Co., Ltd., PE-100), a dispersing agent (Jinan Qingchun chemical industry Co., Ltd., SN5040), a defoaming agent (Jinan Qingchun chemical industry Co., Ltd., NXZ industrial mineral oil water defoaming agent), a leveling agent (Jiangxi Sanyue New Material Co., Ltd., wetting leveling agent SY-8029), a suspending agent (Jiangxi Sanyue New Material Co., Ltd., suspending agent type II) and a film-forming aid (Shenzhen Guitian chemical industry Co., Ltd., clean film-forming aid-alcohol ester 12-J1902) at 25 ℃ for 20min, and vacuumizing for defoaming to obtain a mixed emulsion;
(2) and (2) coating the mixed emulsion obtained in the step (1) on an aluminum foil tape, and drying and curing at 25 ℃ to obtain the radiation refrigeration composite membrane.
Example 2
A radiation refrigeration composite membrane, the radiation refrigeration composite membrane includes a substrate and a functional layer;
the base material is a smooth aluminum foil adhesive tape with the thickness of 60 mu m;
the thickness of the functional layer is 200 μm, and the preparation raw materials comprise the following components in parts by weight:
the preparation method of the radiation refrigeration composite membrane provided by the embodiment is the same as that of the embodiment 1.
Example 3
A radiation refrigeration composite membrane, the radiation refrigeration composite membrane includes a substrate and a functional layer;
the base material is a smooth aluminum foil adhesive tape with the thickness of 60 mu m;
the thickness of the functional layer is 200 μm, and the preparation raw materials comprise the following components in parts by weight:
the preparation method of the radiation refrigeration composite membrane provided by the embodiment is the same as that of the embodiment 1.
Example 4
A radiation refrigeration composite film, which is different from the embodiment 1 in that no fluorescent powder is added, 15 parts by weight of other components are distributed according to respective proportions, and the preparation method is the same as the embodiment 1.
Example 5
The difference between the radiation refrigeration composite membrane and the embodiment 1 is that glass beads are not added, the addition amount of titanium dioxide is 35 parts by weight, other components and the use amount are increased according to a proportion, and the preparation method is the same as that of the embodiment 1.
Example 6
A radiation refrigeration composite membrane is different from the composite membrane in example 1 in that hollow glass beads are adopted to replace solid glass beads, and other components, materials and preparation methods are the same as those in example 1.
Example 7
The radiation refrigeration composite film is different from the composite film in the embodiment 1 in that a substrate layer adopts a woven aluminum foil adhesive tape to replace a plain aluminum foil adhesive tape, and other parameters, structures and preparation methods are the same as those in the embodiment 1.
Comparative example 1
The radiation refrigeration composite film is different from the composite film in the embodiment 1 in that a polyethylene film is adopted for replacing a plain aluminum foil tape as a substrate layer, and other parameters, structures and preparation methods are the same as those in the embodiment 1.
And (3) performance testing:
(1) degree of cracking: soaking the radiation refrigeration composite membrane in water at 23 +/-2 ℃ for 18h, freezing at-20 +/-2 ℃ for 3h, and baking at 50 +/-2 ℃ for 3h in sequence, circulating for 3 times and observing the cracking condition of the surface of the radiation refrigeration composite membrane; wherein, + +++ represents that all samples are cracked, + +++ represents that two thirds of the products are cracked, + + represents that only one third of the products are cracked, and + represents that no sample is cracked;
(2) degree of exfoliation: soaking the radiation refrigeration composite membrane in water at 23 +/-2 ℃ for 18h, freezing at-20 +/-2 ℃ for 3h, and baking at 50 +/-2 ℃ for 3h in sequence, and testing the peeling condition of the surface of the radiation refrigeration composite membrane after circulating for 3 times; wherein ++++ represents that the sample is peeled off entirely, ++++ represents that two thirds of the sample is peeled off, ++ represents that only one third of the sample is peeled off, and + + represents that no sample is peeled off;
(3) cooling effect: coating the radiation refrigeration composite film on a red copper plate, fixing a temperature measuring probe on the red copper plate, irradiating for 2 hours by sunlight, testing the surface temperature of the red copper plate, and calculating the temperature difference between the red copper plate and the surface of the red copper plate which is not covered with the radiation refrigeration composite film;
(4) solar reflectance: testing by using an ultraviolet/visible/near-infrared spectrophotometer to obtain the product;
(5) atmospheric window emissivity: the test result is obtained by using an infrared spectrometer (FTIR).
The radiation refrigeration composite membranes provided in examples 1 to 7 and comparative example 1 were tested according to the above test, and the test results are shown in table 1:
TABLE 1
As can be seen from the data in table 1:
the radiation refrigeration composite membrane provided by the invention has excellent refrigeration effect and high mechanical property; specifically, the cracking degree test of the radiation refrigeration composite membrane obtained in the embodiment 1-7 has at most two thirds of products generating cracks; peel test at most one third of the product was peeled; the test of the cooling effect is-5.1 to-8.7 ℃; the reflectivity of sunlight (300-2500 nm) is 85.6-92.3%; the emissivity of the atmospheric window (8-13 μm) is 81.5-90.3%.
Comparing example 1 with comparative example 1, it can be seen that the refrigeration effect and mechanical property of the radiation refrigeration composite film obtained by using the polyethylene film to replace the plain aluminum foil tape as the base material are both greatly reduced.
Further comparing example 1 with examples 4 and 5, it can be seen that the refrigeration effect and mechanical property of the radiation refrigeration composite film obtained without adding the fluorescent powder (example 4) and without adding the glass beads (example 5) are reduced.
Further comparing example 1 with example 7, it can be seen that the radiation refrigeration composite film obtained by replacing the plain aluminum foil tape with the woven aluminum foil tape has no change in mechanical properties, but the radiation refrigeration effect is reduced.
The applicant states that the present invention is illustrated by the above examples to a radiation refrigeration composite membrane and its preparation method and application, but the present invention is not limited to the above process steps, i.e. it does not mean that the present invention must rely on the above process steps to be carried out. It will be apparent to those skilled in the art that any modification of the present invention, equivalent substitutions of selected materials and additions of auxiliary components, selection of specific modes and the like, which are within the scope and disclosure of the present invention, are contemplated by the present invention.
Claims (10)
1. A radiation refrigeration composite membrane, wherein the radiation refrigeration composite membrane comprises a substrate and a functional layer;
the functional layer is prepared from the raw materials of 20-50 parts by weight of polymer emulsion and 30-55 parts by weight of radiation refrigeration filler;
the substrate comprises a metal foil or a metal tape.
2. A composite radiation refrigerating film according to claim 1 wherein said metallic flakes comprise aluminum flakes, tin flakes or silver flakes.
3. A composite radiation refrigerating film according to claim 1 or 2 wherein the substrate has a thickness of 25 to 100 μm.
4. A composite radiation refrigeration film according to any one of claims 1 to 3 wherein the functional layer has a thickness of 100 to 300 μm;
preferably, the polymer emulsion comprises a styrene-acrylic emulsion or an acrylic emulsion.
5. The radiation refrigeration composite membrane according to any one of claims 1 to 4, wherein the radiation refrigeration filler comprises any one of or a combination of at least two of a silicon-containing inorganic compound, a titanium-containing inorganic compound, a calcium-containing inorganic compound, a zinc-containing inorganic compound or a magnesium-containing inorganic compound;
preferably, the radiation refrigeration filler further comprises fluorescent powder.
6. The radiation refrigeration composite film according to any one of claims 1 to 5, wherein the functional layer is prepared from raw materials further comprising an auxiliary agent;
preferably, the content of the auxiliary agent in the raw materials for preparing the functional layer is 0.5-10 parts by weight;
preferably, the auxiliary agent comprises any one or a combination of at least two of a surfactant, a dispersing agent, a defoaming agent, an anti-settling agent, a leveling agent or a coalescing auxiliary agent;
preferably, the surfactant comprises any one of ionic surfactant, non-ionic surfactant, amphoteric surfactant or compound surfactant or the combination of at least two of the ionic surfactant, the non-ionic surfactant, the amphoteric surfactant and the compound surfactant;
preferably, the dispersant comprises any one or a combination of at least two of an anionic dispersant, a cationic dispersant, a non-ionic dispersant, an amphoteric dispersant or a polymeric dispersant;
preferably, the defoaming agent comprises any one or a combination of at least two of mineral oil defoaming agents, alcohol defoaming agents, fatty acid ester defoaming agents, amide defoaming agents, phosphate ester defoaming agents, silicone defoaming agents, polyether defoaming agents or polyether modified polysiloxane defoaming agents;
preferably, the anti-settling agent comprises any one or a combination of at least two of quartz powder, talcum powder, calcium carbonate powder, bentonite, diatomite, alumina powder or silica powder;
preferably, the coalescing aid comprises any one of or a combination of at least two of an alcohol coalescing aid, an alcohol ester coalescing aid, an alcohol ether coalescing aid or an alcohol ether ester coalescing aid;
preferably, the alcoholic coalescing aid comprises any one of benzyl alcohol, ethylene glycol, propylene glycol, or hexylene glycol, or a combination of at least two thereof;
preferably, the alcohol ester coalescing aid comprises a dodecanol ester;
preferably, the alcohol ether-based coalescing aid comprises any one of ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol ethyl ether or propylene glycol butyl ether or a combination of at least two thereof;
preferably, the alcohol ether ester coalescing aid comprises butyl cellosolve acetate and/or ethyl 3-ethoxypropionate.
7. A preparation method of the composite film for radiation refrigeration as claimed in any one of claims 1 to 6, wherein the preparation method comprises the following steps:
(1) mixing the polymer emulsion, the radiation refrigeration filler and an optional auxiliary agent to obtain mixed slurry;
(2) and (2) coating the mixed slurry obtained in the step (1) on the surface of a base material, and curing to obtain the radiation refrigeration composite membrane.
8. The preparation method according to claim 7, wherein the mixing in step (1) is performed under stirring, preferably at a rotation speed of 500-1500 rpm;
preferably, the temperature of the mixing in the step (1) is 15-30 ℃;
preferably, the mixing time in the step (1) is 20-60 min.
9. The method according to claim 7 or 8, wherein the step (1) of mixing further comprises a step of vacuum defoaming;
preferably, the curing temperature in the step (2) is 20-40 ℃.
10. Use of a radiation refrigeration composite membrane as claimed in any one of claims 1 to 6 in construction.
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| CN109852171A (en) * | 2018-12-19 | 2019-06-07 | 宁波瑞凌新能源科技有限公司 | A kind of radiation cooling coating |
| CN110372976A (en) * | 2019-08-30 | 2019-10-25 | 哈尔滨工业大学 | A kind of reflection-type radiation refrigeration material, film, preparation method and application |
| CN110896639A (en) * | 2019-07-05 | 2020-03-20 | 宁波瑞凌新能源科技有限公司 | Radiation refrigeration functional coating and application thereof |
| CN113234364A (en) * | 2021-05-17 | 2021-08-10 | 中国建筑西南设计研究院有限公司 | Pure broad-spectrum radiation refrigeration coating, preparation method thereof and coating structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109852171A (en) * | 2018-12-19 | 2019-06-07 | 宁波瑞凌新能源科技有限公司 | A kind of radiation cooling coating |
| CN110896639A (en) * | 2019-07-05 | 2020-03-20 | 宁波瑞凌新能源科技有限公司 | Radiation refrigeration functional coating and application thereof |
| CN110372976A (en) * | 2019-08-30 | 2019-10-25 | 哈尔滨工业大学 | A kind of reflection-type radiation refrigeration material, film, preparation method and application |
| CN113234364A (en) * | 2021-05-17 | 2021-08-10 | 中国建筑西南设计研究院有限公司 | Pure broad-spectrum radiation refrigeration coating, preparation method thereof and coating structure |
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