CN115449252A - Radiation refrigeration coating and preparation method thereof - Google Patents
Radiation refrigeration coating and preparation method thereof Download PDFInfo
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- CN115449252A CN115449252A CN202210906347.7A CN202210906347A CN115449252A CN 115449252 A CN115449252 A CN 115449252A CN 202210906347 A CN202210906347 A CN 202210906347A CN 115449252 A CN115449252 A CN 115449252A
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- 238000000576 coating method Methods 0.000 title claims abstract description 83
- 239000011248 coating agent Substances 0.000 title claims abstract description 78
- 230000005855 radiation Effects 0.000 title claims abstract description 64
- 238000005057 refrigeration Methods 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000945 filler Substances 0.000 claims abstract description 30
- 239000000839 emulsion Substances 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 10
- 239000000057 synthetic resin Substances 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 238000001228 spectrum Methods 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000003575 carbonaceous material Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- 230000003595 spectral effect Effects 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 239000003242 anti bacterial agent Substances 0.000 claims description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 6
- 239000000080 wetting agent Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000013538 functional additive Substances 0.000 claims description 5
- 230000003449 preventive effect Effects 0.000 claims description 5
- 239000011265 semifinished product Substances 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000005083 Zinc sulfide Substances 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 238000005054 agglomeration Methods 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 claims description 3
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims description 3
- CSCNMBQITNFHLH-UHFFFAOYSA-L copper;hydrogen phosphate Chemical compound [Cu+2].OP([O-])([O-])=O CSCNMBQITNFHLH-UHFFFAOYSA-L 0.000 claims description 3
- XZTWHWHGBBCSMX-UHFFFAOYSA-J dimagnesium;phosphonato phosphate Chemical compound [Mg+2].[Mg+2].[O-]P([O-])(=O)OP([O-])([O-])=O XZTWHWHGBBCSMX-UHFFFAOYSA-J 0.000 claims description 3
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 claims description 3
- 229910000398 iron phosphate Inorganic materials 0.000 claims description 3
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- RTOOMIOWOJBNTK-UHFFFAOYSA-K sodium;zinc;phosphate Chemical compound [Na+].[Zn+2].[O-]P([O-])([O-])=O RTOOMIOWOJBNTK-UHFFFAOYSA-K 0.000 claims description 3
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 3
- XGFPOHQJFNFBKA-UHFFFAOYSA-B tetraaluminum;phosphonato phosphate Chemical compound [Al+3].[Al+3].[Al+3].[Al+3].[O-]P([O-])(=O)OP([O-])([O-])=O.[O-]P([O-])(=O)OP([O-])([O-])=O.[O-]P([O-])(=O)OP([O-])([O-])=O XGFPOHQJFNFBKA-UHFFFAOYSA-B 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 3
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 3
- OMSYGYSPFZQFFP-UHFFFAOYSA-J zinc pyrophosphate Chemical compound [Zn+2].[Zn+2].[O-]P([O-])(=O)OP([O-])([O-])=O OMSYGYSPFZQFFP-UHFFFAOYSA-J 0.000 claims description 3
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 2
- 239000008199 coating composition Substances 0.000 claims 5
- 239000003973 paint Substances 0.000 claims 1
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 10
- 238000009413 insulation Methods 0.000 description 10
- 238000002310 reflectometry Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000012767 functional filler Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000013212 metal-organic material Substances 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000001579 optical reflectometry Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to a radiation refrigeration coating and a preparation method thereof, which comprises the following raw material components, by weight, 20-35 parts of aqueous synthetic resin emulsion, 10-20 parts of spectrum reflection type filler, 25-40 parts of radiation cooling type filler, 1-5 parts of functional auxiliary agent and 10-30 parts of solvent. The invention adopts a mode of combining a plurality of different fillers, improves the synergistic effect among the fillers, and ensures that the prepared coating has good sunlight reflection performance and radiation cooling performance.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a radiation refrigeration coating and a preparation method thereof.
Background
The radiation refrigeration coating is a coating which is not influenced by surrounding media, can be coated on the outer surface of a building, and radiates the energy of the building itself outwards in the form of electromagnetic waves so as to reduce the temperature of the outer surface of the coated building. The excellent radiation refrigeration coating has high emissivity in the whole range of 8-14 mu m, so that electromagnetic waves in the range of 8-14 mu m are radiated outwards efficiently, and the electromagnetic waves in the wave band are nearly transparent to the atmosphere, and are called as an atmospheric window. Thus, heat exchange with a cosmic cold field (outer space near absolute zero) can be achieved by radiative heat exchange. Meanwhile, the coating has higher solar radiation reflectivity within the range of 0.25-2.5 mu m of solar radiation wave band, and achieves the effect of reducing the heat of the outer surface of the building. The whole radiation process of the radiation refrigeration coating depends on the characteristics of the material, and the loss of self heat can be realized without consuming extra energy, so that the passive cooling is realized.
The prior art has a novel composite radiation refrigeration film material. The material is a film with the thickness of 50 mu m, which is made by randomly embedding a plurality of silica microspheres with the diameter of about 8 mu m in polymethylpentene. The material can radiate energy outwards in the form of infrared electromagnetic waves to achieve the effect of refrigeration, and the infrared emissivity of the material in the range of 8-14um is as high as 0.93. The wavelength band is an atmospheric window of infrared radiation, and the atmosphere of the earth hardly has any resistance to the energy of the wavelength band, so that the energy can be conveyed to an outer space extremely-cold environment, and the temperature of the environment where people live is reduced. If a layer of aluminum film with the thickness of 200nm is plated on the back surface of the material, the solar light reflectivity can be up to 96%, and the refrigeration effect is further improved. Experiments show that the material has the highest weight of 93W/m under direct sunlight at noon 2 The radiation refrigeration power can reduce the temperature of an object in contact with the radiation refrigeration power by 10-16 ℃. The preparation method of the radiation refrigeration film material is simple and easy to implement, and the radiation refrigeration film material can be cut at will and pasted on the outer surface of an object, so that the cooling effect is achieved. However, the problems of high price, high construction difficulty and the like of the material restrict the large-area popularization and application of the material in public buildings.
The Chinese patent document discloses a multilayer radiation cooling coating and a preparation method thereof (publication No. CN 111574878A), and discloses a scheme for respectively constructing an ultraviolet reflection top coating, a visible light reflection middle coating and a near-infrared reflection bottom coating based on a multilayer structure design. However, the coating is mainly used for efficiently reflecting solar energy of different wave bands, can only reduce the receiving amount of the coating material to solar radiation, and cannot realize passive cooling. Meanwhile, the number of layers of the designed structure is too large, so that the construction process is complex, the difficulty of practical application is increased, and the large-area popularization, use and application are limited. And a patent document discloses an outdoor all-weather sunlight reflection and infrared radiation refrigeration coating (publication number is CN 108250873A), which specifically discloses an outdoor sunlight reflection and infrared radiation refrigeration coating, wherein spherical microbeads and metal-plated flaky bodies are added into a coating system, and the reflection of sunlight and the infrared emission function are realized by adopting a layered coating mode, so that radiation cooling is realized. As the metal plated sheet is used as a reflecting material, the reflecting performance to the spectrum is limited, and the excellent cooling effect is difficult to achieve. In addition, various radiation cooling and heat dissipation coatings exist at present, but the coatings cannot reach a balanced state in the aspects of cooling effect, production difficulty, use cost and the like, and even some coatings cannot exert effects on building exterior walls.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a radiation refrigeration coating and a preparation method thereof, which overcome the defects of poor cooling performance, high production cost and small application range of the existing radiation refrigeration coating.
In order to solve the technical problems, the invention adopts the technical scheme that:
in a first aspect, an embodiment of the present invention provides a radiation refrigeration coating, which includes the following raw material components in parts by weight:
20-35 parts of aqueous synthetic resin emulsion, 10-20 parts of spectral reflection type filler, 25-40 parts of radiation cooling type filler, 1-5 parts of functional assistant and 10-30 parts of solvent.
According to the radiation refrigeration coating, the spectrum reflection type filler and the radiation cooling type filler are compounded, and the spectrum characteristic is improved by utilizing the synergistic effect of the spectrum reflection type filler and the radiation cooling type filler; adopt the structural design of individual layer, can form the functional coating that has sunlight reflection and radiation cooling function after making the coating, not only can the maximum reduction obtain from the sunlight energy and through the transmission electromagnetic wave of atmospheric window and carry out heat exchange with outer space cold field to realize passive cooling, compare in the prior art need make the scheme of reflection stratum prefabricate emission layer earlier, the level is simple, and the efficiency of construction is high. In addition, the invention has the advantages of simple raw materials, simple structural design, greatly reduced production cost and large-scale application.
Further, the aqueous synthetic resin emulsion is at least one of pure acrylic emulsion, silicone acrylic emulsion, styrene-acrylic emulsion, ethylene-propylene emulsion, polyurethane emulsion and organic silicon emulsion.
Further, the spectral reflection type filler is at least one of titanium dioxide, zinc oxide, zinc sulfide, zirconium oxide, calcium carbonate, antimony trioxide, zirconium silicate and magnesium oxide.
Further, the radiation cooling type filler is at least one of alumina, barium sulfate, spherical silica, silicon carbide, silicon nitride, zinc phosphate, sodium zinc phosphate, aluminum phosphate, iron phosphate, copper hydrogen phosphate, magnesium pyrophosphate, zinc pyrophosphate, aluminum pyrophosphate and inorganic carbon materials.
Further, the infrared radiation emissivity of the inorganic carbon material is more than or equal to 95%.
According to the description, the inorganic carbon material with the infrared radiation emissivity being more than or equal to 95% is selected, so that the electromagnetic wave emissivity of the prepared coating at an atmospheric window can be remarkably improved, the heat exchange power of the coating and a space cold field is further improved, and the heat exchange performance is improved.
Further, the functional assistant is at least one of a film-forming assistant, a thickening agent, a pH regulator, a wetting agent, a dispersing agent, a defoaming agent, a leveling agent, an antibacterial agent, a mildew preventive and an antifreezing agent.
In a second aspect, an embodiment of the present invention provides a preparation method of a radiation refrigeration coating, including the following steps:
(1) Adding part of functional auxiliary agent into the solvent, and stirring until no obvious powder exists in the solution;
(2) Adding the rest functional auxiliary agent and stirring;
(3) Adding the spectral reflection type filler and the radiation cooling type filler in sequence and stirring until no obvious agglomeration exists;
(4) Adding the aqueous synthetic resin emulsion and stirring uniformly;
(5) And (5) filtering the semi-finished product of the coating obtained in the step (4) to obtain the radiation refrigeration coating.
The technical effect provided by the second aspect is described with reference to the related description provided by the first aspect.
Further, the functional additives added in the step (1) are a thickening agent and a pH regulator.
Further, the functional additives added in the step (2) are a film forming additive, a wetting agent, a dispersing agent, a defoaming agent, an antibacterial agent and a mildew preventive.
Further, filtering the semi-finished product of the coating in the step (5) by using a screen of 80-100 meshes.
According to the description, the particles of the coating finished product obtained after the coating semi-finished product is filtered are finer and more uniform, so that the surface of the coating is smooth and flat after the coating is coated on the surface of a building, and further the heat exchange efficiency of the coating on all parts of the surface of the building is balanced.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below. It should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The radiation refrigeration coating comprises the following raw material components in parts by weight:
20-35 parts of aqueous synthetic resin emulsion, 10-20 parts of spectral reflection type filler, 25-40 parts of radiation cooling type filler, 1-5 parts of functional assistant and 10-30 parts of solvent. Preferably, the solvent is water.
Optionally, the aqueous synthetic resin emulsion is at least one of pure acrylic emulsion, silicone acrylic emulsion, styrene-acrylic emulsion, ethylene-propylene emulsion, polyurethane emulsion and organic silicon emulsion.
Optionally, the spectral reflection type filler is at least one of titanium dioxide, zinc oxide, zinc sulfide, zirconium oxide, calcium carbonate, antimony trioxide, zirconium silicate and magnesium oxide. The spectral reflection filler is selected to ensure that the prepared coating has high electromagnetic wave emissivity in the whole atmospheric window range.
Optionally, the radiation cooling filler is at least one of alumina, barium sulfate, spherical silica, silicon carbide, silicon nitride, zinc phosphate, sodium zinc phosphate, aluminum phosphate, iron phosphate, copper hydrogen phosphate, magnesium pyrophosphate, zinc pyrophosphate, aluminum pyrophosphate and inorganic carbon materials. In an atmospheric window, strong emission wave bands of different fillers are respectively as follows: alumina is mainly 12 to 14 μm, silicon carbide and silicon nitride are mainly 10 to 12 μm, barium sulfate, silica, phosphates and pyrophosphates are mainly 8 to 10 μm, and inorganic carbon materials can cover the entire wavelength band. Wherein the particle size of the alumina is 300nm to 800nm (submicron); the particle size of the spherical silica should be 5um to 30um.
Optionally, in order to ensure that the infrared radiation emissivity of the inorganic carbon material is greater than or equal to 95%, the inorganic carbon material is at least one of football, carbon nanotube and graphene. Preferably, when the inorganic carbon material is selected from carbon nanotubes and graphene, the two materials are pretreated, and the specific steps are as follows: firstly, soaking and washing the inorganic carbon material by absolute ethyl alcohol, drying, and performing at least three cycles to remove surface impurities; then, carrying out microwave treatment for 1 minute under the condition of 500W of power, rapidly heating the material with the defects of high graphitization degree, and carrying out carbon repair; soaking in mixed acid solution (concentrated hydrochloric acid: concentrated nitric acid = 3:1) for 24 hours to purify the material and graft various functional groups, thereby improving the dispersibility of the material in the emulsion; and finally, washing with deionized water for multiple times until the pH of the solution is =7, and drying to obtain the pretreated inorganic carbon material.
Optionally, the functional additive is at least one of a film forming additive, a thickening agent, a pH regulator, a wetting agent, a dispersing agent, a defoaming agent, a leveling agent, an antibacterial agent, a mildewproof agent and an antifreezing agent.
A preparation method of radiation refrigeration coating comprises the following steps:
(1) Adding a thickening agent and a pH regulator into a solvent, and stirring for 15-30 min in a high-speed dispersion machine at the rotating speed of 200-600 rpm until no obvious powder exists in the solution;
(2) Adding film forming assistant, wetting agent, dispersant, defoaming agent, antibacterial agent and mildew preventive, and stirring in a high-speed dispersion machine at the rotating speed of 500-1000 rpm for 5-10 min;
(3) Adding the spectrum reflection type filler and the radiation cooling type filler in sequence, and stirring for 30-60 min in a high-speed dispersion machine at the rotating speed of 1000-2500 rpm until no obvious agglomeration is generated;
(4) Adding the aqueous synthetic resin emulsion and stirring in a high-speed dispersion machine at the rotating speed of 500-1000 rpm for 30-60 min until the mixture is uniformly stirred;
(5) Filtering the semi-finished product of the coating obtained in the step (4) by using a screen with 80-100 meshes to obtain the radiation refrigeration coating.
The radiation refrigeration coating prepared by the preparation method is mainly used for building exterior walls, and the construction process specifically comprises the following steps:
coating the radiation refrigeration coating on a base material according to the thickness of 100-500 mu m, standing after the surface is dried, and curing at room temperature for more than 7 days.
The coating mode comprises spraying, brushing, rolling coating, blade coating and the like, and the base material comprises regular or irregular concrete wall surfaces and metal, organic or inorganic material surfaces.
Examples 1 to 8 of the present invention were each prepared using the above-described raw materials and the above-described production method, and the differences were that the raw materials were added in different amounts and that the components were partially different in each example, and table 1 was specifically referred to.
TABLE 1
From the comparison of the eight different examples in table 1 with heat reflective coatings, the following experimental data parameters can be derived, see table 2. The test of the related performance of the coating refers to the national standard GB/T9755-2014, and the test of the characteristic spectrum reflectivity and the emissivity is respectively measured by an ultraviolet-visible light-near infrared spectrophotometer and an infrared spectrometer equipped with a gold integrating sphere; the heat insulation temperature difference test can refer to a heat insulation temperature difference test device of building energy-saving coating (application number 202220683983.3) applied by an inventor, specifically, the coating is coated on a standard aluminum plate to prepare a coating, the coating is placed in a natural environment to monitor the temperature of the coating and the environment in real time, and the energy-saving effect of the coating can be qualitatively evaluated according to the generated heat insulation temperature difference value.
TABLE 2
As can be seen from Table 2, the radiation refrigeration coating for the building exterior wall provided by the invention has excellent heat preservation and insulation performance, physical and chemical stability, durability, strong adhesive force and other performances, can generate heat insulation temperature difference of 12-18 ℃ for a building, is obviously superior to a heat reflection coating, has good storage property, and does not have the phenomena of layering and caking.
Comparing example 1 with example 2, it can be known that increasing the content of the reflective insulation component (specifically calcium carbonate in example 1 and example 2) in the functional filler can increase the solar radiation reflectivity of the coating, and further reduce the absorption of the coating to the solar energy, thereby increasing the insulation temperature difference of the building envelope structure, and improving the energy saving performance, that is, reducing the energy required for refrigeration in the building in a unit time period.
It is understood from the comparison between examples 1 and 3 that the use of a phosphate-based functional filler partially replaces the metal oxide, and the electromagnetic wave reflectance in each wavelength range is improved.
Comparing example 1 with example 4, it can be seen that the use of spherical silica instead of titanium dioxide in the coating can improve the electromagnetic wave reflectivity of the coating to the ultraviolet band, but the electromagnetic wave reflectivity to the visible light and near infrared band will decrease.
Comparing example 1 and example 5, it is known that replacing part of the high emissivity metal oxide with alumina reduces the electromagnetic emissivity of the coating, resulting in a reduction in energy saving performance. Therefore, the radiation filler of the radiation cooling coating is prepared from the combination of various high-emissivity substances, so that the radiation filler is matched with the high-emissivity substances, and the high emissivity can be realized in the whole atmospheric window range.
Comparing the embodiment 1 with the embodiments 6 to 8, it can be known that the emissivity of the auxiliary refrigeration coating at the 'atmospheric window' can be remarkably improved by adding a small amount of inorganic carbon material in the functional filler, and further the heat exchange power between the coating and the space cold field is improved, so that a larger heat insulation temperature difference is generated, and the composite refrigeration coating has more excellent energy-saving performance. With the increasing content of the inorganic carbon material, although the emissivity at the 'atmospheric window' can be increased continuously, the spectral reflectivity in the wavelength band of 250nm to 2500nm is reduced remarkably, which means that the coating obtains more energy from sunlight, and finally, the measured value of the thermal insulation temperature difference is reduced to a certain extent. And the balance between the reflectivity and the emissivity of the radiation refrigeration coating can be influenced by adding excessive inorganic carbon materials, so that the energy-saving effect is reduced.
Compared with the existing heat reflection coating, the radiation refrigeration coating provided by the invention can meet the high reflectivity in ultraviolet, visible light and near infrared bands, can provide high electromagnetic wave emissivity at an atmospheric window, and has much higher comprehensive performance than the existing heat reflection coating after being subjected to an outdoor heat insulation temperature difference test, thereby realizing more excellent energy-saving performance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The radiation refrigeration coating is characterized by comprising the following raw material components in parts by weight:
20-35 parts of aqueous synthetic resin emulsion, 10-20 parts of spectral reflection type filler, 25-40 parts of radiation cooling type filler, 1-5 parts of functional assistant and 10-30 parts of solvent.
2. A radiation-curable coating composition according to claim 1, wherein: the water-based synthetic resin emulsion is at least one of pure acrylic emulsion, silicone acrylic emulsion, styrene-acrylic emulsion, ethylene-propylene emulsion, polyurethane emulsion and organic silicon emulsion.
3. A radiation-curable coating composition according to claim 1, wherein: the spectrum reflection type filler is at least one of titanium dioxide, zinc oxide, zinc sulfide, zirconium oxide, calcium carbonate, antimony trioxide, zirconium silicate and magnesium oxide.
4. A radiation-curable coating composition according to claim 1, wherein: the radiation cooling type filler is at least one of alumina, barium sulfate, spherical silica, silicon carbide, silicon nitride, zinc phosphate, sodium zinc phosphate, aluminum phosphate, iron phosphate, copper hydrogen phosphate, magnesium pyrophosphate, zinc pyrophosphate, aluminum pyrophosphate and inorganic carbon materials.
5. A radiation-curable coating composition according to claim 4, wherein: the infrared radiation emissivity of the inorganic carbon material is not less than 95%.
6. A radiation-curable coating composition according to claim 1, wherein: the functional auxiliary agent is at least one of a film forming auxiliary agent, a thickening agent, a pH regulator, a wetting agent, a dispersing agent, a defoaming agent, a leveling agent, an antibacterial agent, a mildew preventive and an antifreezing agent.
7. A preparation method of the radiation refrigeration coating applied to any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) Adding part of functional auxiliary agent into the solvent, and stirring until no obvious powder exists in the solution;
(2) Adding the rest functional auxiliary agent and stirring;
(3) Adding the spectral reflection type filler and the radiation cooling type filler in sequence and stirring until no obvious agglomeration exists;
(4) Adding the aqueous synthetic resin emulsion and uniformly stirring;
(5) And (5) filtering the semi-finished product of the coating obtained in the step (4) to obtain the radiation refrigeration coating.
8. The method for preparing a radiation refrigeration coating according to claim 7, characterized in that: the functional additives added in the step (1) are a thickening agent and a pH regulator.
9. The method for preparing a radiation refrigeration coating according to claim 7, characterized in that: the functional additives added in the step (2) are a film forming additive, a wetting agent, a dispersing agent, a defoaming agent, an antibacterial agent and a mildew preventive.
10. The method for preparing a radiation refrigeration coating according to claim 7, characterized in that: and (5) filtering the semi-finished paint product in the step (5) by using a screen of 80-100 meshes.
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