CN114836113A - Water-based nano high-temperature-resistant heat-insulating material and preparation method thereof - Google Patents
Water-based nano high-temperature-resistant heat-insulating material and preparation method thereof Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000011810 insulating material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000049 pigment Substances 0.000 claims abstract description 28
- 239000004005 microsphere Substances 0.000 claims abstract description 27
- 239000000919 ceramic Substances 0.000 claims abstract description 26
- 239000004964 aerogel Substances 0.000 claims abstract description 15
- 239000000839 emulsion Substances 0.000 claims abstract description 15
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 14
- 239000011029 spinel Substances 0.000 claims abstract description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- 238000004321 preservation Methods 0.000 claims abstract description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 8
- 239000004965 Silica aerogel Substances 0.000 claims abstract description 5
- 229920001577 copolymer Polymers 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 25
- 238000010304 firing Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000002562 thickening agent Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000013530 defoamer Substances 0.000 claims description 7
- 239000003995 emulsifying agent Substances 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000012065 filter cake Substances 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 239000012266 salt solution Substances 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 150000003608 titanium Chemical class 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- 229910021538 borax Inorganic materials 0.000 claims description 2
- 238000001354 calcination Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000008394 flocculating agent Substances 0.000 claims description 2
- 238000005189 flocculation Methods 0.000 claims description 2
- 230000016615 flocculation Effects 0.000 claims description 2
- 229910001676 gahnite Inorganic materials 0.000 claims description 2
- 229910001691 hercynite Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 239000011572 manganese Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 239000004328 sodium tetraborate Substances 0.000 claims description 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- -1 acrylic ester Chemical class 0.000 claims 1
- 239000004576 sand Substances 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 21
- 238000000576 coating method Methods 0.000 abstract description 21
- 238000009413 insulation Methods 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 10
- 238000001579 optical reflectometry Methods 0.000 abstract description 4
- 239000000945 filler Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003075 superhydrophobic effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
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- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant 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
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- 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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2262—Oxides; Hydroxides of metals of manganese
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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
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2201/011—Nanostructured additives
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/90—Passive houses; Double facade technology
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- Wood Science & Technology (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a water-based nano high-temperature-resistant heat-insulating material which is prepared from the following components in percentage by mass: 16-22% of water-based resin, 3-10% of infrared reflection pigment, 3-26% of silicon dioxide aerogel, 19-26% of hollow microspheres, 18-38% of water, 6-10% of emulsion and 2-5% of auxiliary agent; according to the invention, the titanium-plated nano ceramic hollow microspheres are added as a filler, gas is filled in the titanium-plated nano ceramic hollow microspheres, the heat conductivity coefficient is low, the coating has good heat insulation and heat preservation properties, meanwhile, the added styrene and acrylate copolymer emulsion can fill gaps between the titanium-plated nano ceramic hollow microspheres, so that the components of the coating are connected more tightly, the light reflectivity of the coating can be improved, the infrared reflection pigment prepared by adding far infrared ceramic powder and spinel powder enables the coating to have higher light reflectivity, the heat gain on the surface of the material can be reduced, the purpose of heat insulation is achieved, the adhesion of the coating is better when the added silica aerogel is 4%, the heat conductivity is low, and the using amount of the silica aerogel can be reduced.
Description
Technical Field
The invention relates to the field of paint production, in particular to a water-based nano high-temperature-resistant heat-insulating material and a preparation method thereof.
Background
At present, the problem of world energy shortage is increasingly severe, and the requirements of various industries on energy conservation and emission reduction are higher and higher. In the building field, because the energy consumption accounts for about 30% of the total social energy consumption and is only the proportion of energy consumed by the building in the building and use processes, if the energy consumed in the building material production process is added, the related energy consumption of the building accounts for 46.7% of the total social energy consumption. Building energy conservation is very important to achieve the goal of "double carbon".
The building heat preservation and insulation is one of important measures for reducing energy consumption, and the heat preservation and insulation coating is used as a novel coating, and plays a more and more powerful role in the building energy saving process by virtue of the advantages of heat preservation, energy saving, convenient construction, strong adaptability and the like. However, with the development of national economy and the progress of science and technology, people have higher and higher requirements on the heat-insulating coating, and whether the thin layer of heat-insulating coating can be used as a protective coat for buildings becomes a problem worthy of thinking.
The heat preservation and insulation method mainly focuses on two categories, namely a resistance conduction technology based on a heat conduction principle and a light reflection technology based on a surface reflection principle; conduction is one of the primary paths of heat transfer;
the so-called 'resistance to conduction' is that the conduction resistance is increased, and the heat transfer speed at the two ends of the wall body is slowed down. The material with low heat conductivity coefficient is adopted to slow down the heat conduction caused by the temperature difference at two ends of the wall surface, is the technical strategy of the material, and is most typical and most widely applied to various heat insulation materials made of polystyrene. The same technical path is adopted for various heat-insulating mortar, heat-insulating putty, inorganic foaming materials, aerogel materials and rock wool heat-insulating materials;
the application of light reflection technology in building heat insulation and energy conservation is based on the fact that the sun generates the main heat source on the earth through light radiation, and the recognition that the heat in the environment is mainly from the sun irradiation. According to the principle of physical light reflection, solar radiation incident on the surface of a material is absorbed, transmitted or reflected, and the absorption rate a, the transmittance r and the reflectance p have the following relationship atr + p ═ 1. Under the premise, the heat gain of the material surface is reduced by improving the reflectivity of the material surface to sunlight, so that the purpose of heat insulation is achieved, and the method is a basic strategy of a light reflection technology.
The larger the addition of SiO aerogel in a certain range in the existing water-based nano heat-insulating coating is, the better the heat-insulating property of the prepared coating is, the heat conductivity coefficient is reduced along with the increase of the usage amount of the SiO aerogel, but the performance of other raw materials can be possibly changed by increasing the usage amount of the SiO aerogel, and the heat-insulating coating prepared by combining a conduction resistance technology and a light reflection technology is not available in the current market.
Disclosure of Invention
The invention aims to provide a water-based nano high-temperature-resistant heat-insulating material and a preparation method thereof, which solve the problems.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the invention provides a water-based nano high-temperature-resistant heat-insulating material which is prepared from the following components in percentage by mass: 16-22% of water-based resin, 3-10% of infrared reflection pigment, 3-26% of silicon dioxide aerogel, 19-26% of hollow microspheres, 18-28% of water, 6-10% of emulsion and 5-8% of auxiliary agent;
wherein: the aqueous resin comprises: the infrared reflection pigment is a sinter of far infrared ceramic powder and spinel powder, the hollow microspheres are titanium-plated nano ceramic hollow microspheres, and the preparation method of the titanium-plated nano ceramic hollow microspheres comprises the following steps: mixing the nano ceramic hollow microspheres in a reaction kettle filled with deionized water, adjusting the pH value and the temperature of the system, controlling the pH value to be 2.4-2.7, and controlling the temperature to be: slowly dripping titanium salt solution at 80-90 ℃, simultaneously using NaOH to always maintain the pH value of the system between 2.4-2.7, after dripping is finished, raising the temperature of the system to 90-98 ℃, continuing to react for 1-2h, then filtering, washing a filter cake, drying the filter cake in a drying box at 110-130 ℃ for 2-4h, and then calcining in a muffle furnace for 2-3h to obtain the titanium-plated nano ceramic hollow microspheres.
Preferably, the preparation method of the infrared reflection pigment comprises the following steps: preparing spinel by an electric melting method or a sintering method for later use, uniformly mixing 20-31% of spinel, 16-20% of quartz, 11-19% of borax, 23-31% of talcum powder, 2-4% of polyacrylamide and the balance of water, performing wet ball milling for 14-28 hours to obtain slurry, sieving the slurry by a 100-plus 180-mesh sieve, adding a flocculating agent for selective flocculation, removing flocculate, drying, and firing in an oxidizing atmosphere, wherein the firing stage is as follows: the first stage is as follows: firing at 320-580 ℃ for 20-40min, and the second stage: firing at 600-720 ℃ for 30-42min, and the third stage: firing at 750-900 ℃ for 50-60min, and a fourth stage: firing at 920-1100 ℃ for 50-62min, and a fifth stage: firing at 1100-1250 ℃ for 20-30min, then cooling to room temperature along with the furnace, performing dry ball milling on the sintered mixture for 20-30 hours, and finally sieving with a 200-320-mesh sieve to obtain the infrared reflection pigment.
Preferably, the spinel comprises: magnesium spinel, hercynite, gahnite, manganese spinel.
Preferably, the flocculant is polyacrylamide.
Preferably, the auxiliary agent comprises 0.6-1.1% of emulsifier, 0.5-0.9% of thickener, 0.7-1.5% of pigment dispersant, 0.5-0.1.1% of defoaming agent and 0.2-0.5% of leveling agent, wherein the pigment dispersant is selected from the group consisting of Norppoco auxiliary agents, the thickener is selected from the group consisting of Prolate trade company, Inc. of Guangzhou and has the specification of RM-2020, and the defoaming agent is selected from the group consisting of Prolate trade company, Inc. of Guangzhou and has the specification of: NXZ.
Preferably, the titanium salt solution is dripped for 3-5h in the preparation process of the titanium-plated nano ceramic hollow microspheres, and the stirring speed of the reaction kettle is 50-60 r/min.
Preferably, the emulsion is a copolymer emulsion of styrene and acrylate.
Preferably, the silica aerogel is 4%.
The preparation method of the water-based nano high-temperature-resistant heat-insulating material adopts the water-based nano high-temperature-resistant heat-insulating material to prepare: the method specifically comprises the following steps:
(1) adding water, the infrared reflection pigment and the pigment dispersant into a dispersion cylinder, and uniformly stirring at the stirring speed of 120-;
(2) slowly adding the titanium-plated nano ceramic hollow microspheres, the auxiliary agent and the emulsion into the mixture A obtained in the step (1) and uniformly stirring at a low speed of 40-50r/min for 40-60min to obtain a mixture B;
(3) and adding the silicon dioxide aerogel and the water-based resin into the mixture B obtained in the step 2, and continuously stirring at the rotating speed of 40-50r/min for 20-30min to obtain the water-based nano high-temperature-resistant heat-insulating material.
The invention has the beneficial effects that:
(1) the titanium-plated nano ceramic hollow microspheres are added as the filler, the gas is filled in the titanium-plated nano ceramic hollow microspheres, the heat conductivity coefficient is low, the coating has good heat insulation and heat preservation performance, and meanwhile, the added styrene and acrylate copolymer emulsion can fill gaps among the titanium-plated nano ceramic hollow microspheres, so that the components of the coating are connected more tightly, and the light reflectivity of the coating can be improved.
(2) The infrared reflection pigment prepared by adding the far infrared ceramic powder and the spinel powder ensures that the coating has higher light reflectivity, and can reduce the heat gain of the surface of the material, thereby achieving the purpose of heat insulation.
(3) When the content of the added silicon dioxide aerogel is 4%, the adhesive force of the coating is good, the thermal conductivity is low, and the using amount of the silicon dioxide aerogel can be reduced on the premise of ensuring good thermal insulation.
(4) The water-based resin added in the invention has the function of high temperature resistance.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The preparation method comprises the following specific steps:
(1) adding 26% of water, 4% of infrared reflection pigment and 0.8% of pigment dispersant into a dispersion cylinder, and uniformly stirring at the stirring speed of 120r/min for 8min to obtain a mixture A;
(2) slowly adding 19% of titanium-plated nano ceramic hollow microspheres, 0.6% of emulsifier, 0.8% of thickener, 0.5% of defoamer, 0.3% of flatting agent and 8% of emulsion into the mixture A obtained in the step (1), and uniformly stirring at a low speed of 45r/min for 50min to obtain a mixture B;
(3) and adding 26% of silicon dioxide aerogel and 16% of water-based resin into the mixture B obtained in the step 2, and continuously stirring at the rotating speed of 45r/min for 27min to obtain the water-based nano high-temperature-resistant heat-insulating material.
Example 2
The preparation method comprises the following specific steps:
(1) adding 18% of water, 10% of infrared reflection pigment and 0.8% of pigment dispersant into a dispersion cylinder, and uniformly stirring at the stirring speed of 120r/min for 8min to obtain a mixture A;
(2) slowly adding 19% of titanium-plated nano ceramic hollow microspheres, 0.6% of emulsifier, 0.8% of thickener, 0.5% of defoamer, 0.3% of flatting agent and 8% of emulsion into the mixture A obtained in the step (1), and uniformly stirring at a low speed of 45r/min for 50min to obtain a mixture B;
(3) and adding 26% of silicon dioxide aerogel and 16% of water-based resin into the mixture B obtained in the step 2, and continuously stirring at the rotating speed of 45r/min for 27min to obtain the water-based nano high-temperature-resistant heat-insulating material.
Example 3
The preparation method comprises the following specific steps:
(1) adding 38% of water, 4% of infrared reflection pigment and 0.8% of pigment dispersant into a dispersion cylinder, and uniformly stirring at the stirring speed of 120r/min for 8min to obtain a mixture A;
(2) slowly adding 19% of titanium-plated nano ceramic hollow microspheres, 0.6% of emulsifier, 0.8% of thickener, 0.5% of defoamer, 0.3% of flatting agent and 10% of emulsion into the mixture A obtained in the step (1), and uniformly stirring at a low speed of 45r/min for 50min to obtain a mixture B;
(3) and adding 4% of silicon dioxide aerogel and 22% of water-based resin into the mixture B obtained in the step 2, and continuously stirring at the rotating speed of 45r/min for 27min to obtain the water-based nano high-temperature-resistant heat-insulating material.
Example 4
The preparation method comprises the following specific steps:
(1) adding 32% of water, 10% of infrared reflection pigment and 0.8% of pigment dispersant into a dispersion cylinder, and uniformly stirring at the stirring speed of 120r/min for 8min to obtain a mixture A;
(2) slowly adding 19% of titanium-plated nano ceramic hollow microspheres, 0.6% of emulsifier, 0.8% of thickener, 0.5% of defoamer, 0.3% of flatting agent and 10% of emulsion into the mixture A obtained in the step (1), and uniformly stirring at a low speed of 45r/min for 50min to obtain a mixture B;
(3) and adding 4% of silicon dioxide aerogel and 22% of water-based resin into the mixture B obtained in the step 2, and continuously stirring at the rotating speed of 45r/min for 27min to obtain the water-based nano high-temperature-resistant heat-insulating material.
Comparative example:
the invention uses Chinese patent: a super-hydrophobic self-cleaning heat-insulating building exterior wall coating has the following patent numbers: CN 108997873B example 1 for comparison.
In order to further verify the technical effect of the invention, the prepared sample is coated on a sample plate made of a cement board, the thickness of the layer is 20/mum, the following tests are respectively carried out, and the test results are compared with the comparative example, wherein the test bases or standards are as follows:
(1) surface drying time: the assay is according to GB/T1728-1979 (1989); (2) the actual drying time is as follows: the test is according to GB/T1728-1979 (1989); (1) testing the surface solar reflectance, and detecting according to JG/T235-2008 'architectural reflective insulation coating'; (3) thermal conductivity is measured by using a thermal conductivity tester according to GB/T10294-2008 ' determination of steady-state thermal resistance and related characteristics of heat-insulating materials ' protective hot plate method '; (4) and adhesive force detection: the test is carried out according to GB/T5210-2006; (5) and (3) reflectivity testing: detecting according to JG/T235-2008 'architectural reflective insulation coating';
TABLE 1
As can be seen from Table 1, the reflectivity of examples 1-4 is superior to that of the comparative example, which shows that the added infrared reflective pigment can reduce the heat gain of the material surface, thereby achieving the purpose of heat insulation;
it can be seen from examples 1-4 that the adhesion of the coating was better when 4% of silica aerogel was added, and the thermal conductivity was better than that of the comparative example.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A water-based nanometer high-temperature-resistant heat-insulating material is characterized in that: the composition is prepared from the following components in percentage by mass: 16-22% of water-based resin, 3-10% of infrared reflection pigment, 3-26% of silicon dioxide aerogel, 19-26% of hollow microspheres, 18-38% of water, 6-10% of emulsion and 2-5% of auxiliary agent;
wherein: the aqueous resin comprises: the infrared reflection pigment is a sinter of far infrared ceramic powder and spinel powder, the hollow microspheres are titanium-plated nano ceramic hollow microspheres, and the preparation method of the titanium-plated nano ceramic hollow microspheres comprises the following steps: mixing the nano ceramic hollow microspheres in a reaction kettle filled with deionized water, adjusting the pH value and the temperature of the system, controlling the pH value to be 2.4-2.7, and controlling the temperature to be: slowly dripping titanium salt solution at 80-90 ℃, simultaneously using NaOH to always maintain the pH value of the system between 2.4-2.7, after dripping is finished, raising the temperature of the system to 90-98 ℃, continuing to react for 1-2h, then filtering, washing a filter cake, drying the filter cake in a drying box at 110-130 ℃ for 2-4h, and then calcining in a muffle furnace for 2-3h to obtain the titanium-plated nano ceramic hollow microspheres.
2. The water-based nanometer high-temperature-resistant heat-preservation and insulation material as claimed in claim 1, wherein: the preparation method of the infrared reflection pigment comprises the following steps: preparing spinel by an electric melting method or a sintering method for later use, uniformly mixing 20-31% of spinel, 16-20% of quartz, 11-19% of borax, 23-31% of talcum powder, 2-4% of polyacrylamide and the balance of water, performing wet ball milling for 14-28 hours to obtain slurry, sieving the slurry through a 100-plus 180-mesh sieve, adding a flocculating agent for selective flocculation, removing flocculate, drying, and firing in an oxidizing atmosphere, wherein the firing stage is as follows: the first stage is as follows: firing at 320-580 ℃ for 20-40min, and the second stage: firing at 600-720 ℃ for 30-42min, and the third stage: firing at 750-900 ℃ for 50-60min, and a fourth stage: firing at 920-1100 ℃ for 50-62min, and a fifth stage: firing at 1100-1250 ℃ for 20-30min, then cooling to room temperature along with the furnace, performing dry ball milling on the sintered mixture for 20-30 hours, and finally sieving through a 200-sand 320-mesh sieve to obtain the infrared reflection pigment.
3. The water-based nanometer high-temperature-resistant heat-insulating material as claimed in claim 1, wherein: the spinel comprises: magnesium spinel, hercynite, gahnite, manganese spinel.
4. The water-based nanometer high-temperature-resistant heat-insulating material as claimed in claim 2, wherein: the flocculant is polyacrylamide.
5. The water-based nanometer high-temperature-resistant heat-preservation and insulation material as claimed in claim 1, wherein: the auxiliary agent comprises 0.6-1.1% of emulsifier, 0.5-0.9% of thickener, 0.7-1.5% of pigment dispersant, 0.5-0.1.1% of defoamer and 0.2-0.5% of flatting agent, wherein the pigment dispersant is selected from Nipponpoko auxiliary agent company, the thickener is selected from Guangzhou Pepper company trade company, the specification is RM-2020, the defoamer is selected from Guangzhou Shenjiang company trade company, the specification is: NXZ.
6. The water-based nanometer high-temperature-resistant heat-insulating material as claimed in claim 1, wherein: the titanium salt solution is dropwise added for 3-5h in the preparation process of the titanium-plated nano ceramic hollow microspheres, and the stirring speed of the reaction kettle is 50-60 r/min.
7. The water-based nanometer high-temperature-resistant heat-insulating material as claimed in claim 1, wherein: the emulsion is a copolymer emulsion of styrene and acrylic ester.
8. The water-based nanometer high-temperature-resistant heat-insulating material as claimed in claim 1, wherein: the silica aerogel content was 4%.
9. A method for preparing the water-based nanometer high-temperature resistant heat preservation and insulation material according to any one of claims 1 to 8, which is characterized in that: the method specifically comprises the following steps:
(1) adding water, the infrared reflection pigment and the pigment dispersant into a dispersion cylinder, and uniformly stirring at the stirring speed of 120-;
(2) slowly adding the titanium-plated nano ceramic hollow microspheres, the emulsifier, the thickener, the defoamer, the flatting agent and the emulsion into the mixture A obtained in the step (1) and uniformly stirring at a low speed of 40-50r/min for 40-60min to obtain a mixture B;
(3) and adding the silicon dioxide aerogel and the water-based resin into the mixture B obtained in the step 2, and continuously stirring at the rotating speed of 40-50r/min for 20-30min to obtain the water-based nano high-temperature-resistant heat-insulating material.
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