CN113502102A - Heat-insulating coating and preparation method thereof - Google Patents
Heat-insulating coating and preparation method thereof Download PDFInfo
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- CN113502102A CN113502102A CN202110894077.8A CN202110894077A CN113502102A CN 113502102 A CN113502102 A CN 113502102A CN 202110894077 A CN202110894077 A CN 202110894077A CN 113502102 A CN113502102 A CN 113502102A
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- activated carbon
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- 238000000576 coating method Methods 0.000 title claims abstract description 78
- 239000011248 coating agent Substances 0.000 title claims abstract description 75
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 45
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000839 emulsion Substances 0.000 claims abstract description 36
- -1 fluorine-silicon modified acrylate Chemical class 0.000 claims abstract description 34
- 239000012767 functional filler Substances 0.000 claims abstract description 25
- 239000004642 Polyimide Substances 0.000 claims abstract description 22
- 239000004005 microsphere Substances 0.000 claims abstract description 22
- 229920001721 polyimide Polymers 0.000 claims abstract description 22
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims abstract description 18
- NJVOHKFLBKQLIZ-UHFFFAOYSA-N (2-ethenylphenyl) prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1C=C NJVOHKFLBKQLIZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002131 composite material Substances 0.000 claims abstract description 16
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 16
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 16
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 10
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 8
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims abstract description 8
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims abstract description 8
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 8
- 239000011734 sodium Substances 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 135
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 118
- 239000004964 aerogel Substances 0.000 claims description 67
- 239000000203 mixture Substances 0.000 claims description 45
- 239000000377 silicon dioxide Substances 0.000 claims description 43
- 235000012239 silicon dioxide Nutrition 0.000 claims description 43
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 42
- 238000003756 stirring Methods 0.000 claims description 40
- 238000009413 insulation Methods 0.000 claims description 39
- 238000002156 mixing Methods 0.000 claims description 32
- 238000009210 therapy by ultrasound Methods 0.000 claims description 30
- 238000001035 drying Methods 0.000 claims description 28
- 238000004321 preservation Methods 0.000 claims description 26
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 25
- 239000000843 powder Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 20
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims description 19
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 18
- DAFHKNAQFPVRKR-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylpropanoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)C DAFHKNAQFPVRKR-UHFFFAOYSA-N 0.000 claims description 17
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 16
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 14
- 239000011812 mixed powder Substances 0.000 claims description 14
- 239000000725 suspension Substances 0.000 claims description 14
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 claims description 13
- 239000002244 precipitate Substances 0.000 claims description 13
- 229910006213 ZrOCl2 Inorganic materials 0.000 claims description 11
- IPCAPQRVQMIMAN-UHFFFAOYSA-L zirconyl chloride Chemical compound Cl[Zr](Cl)=O IPCAPQRVQMIMAN-UHFFFAOYSA-L 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 235000019441 ethanol Nutrition 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- LJGHYPLBDBRCRZ-UHFFFAOYSA-N 3-(3-aminophenyl)sulfonylaniline Chemical compound NC1=CC=CC(S(=O)(=O)C=2C=C(N)C=CC=2)=C1 LJGHYPLBDBRCRZ-UHFFFAOYSA-N 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 239000011787 zinc oxide Substances 0.000 claims description 9
- 150000001252 acrylic acid derivatives Chemical class 0.000 claims description 8
- WZQSBCHNVPAYOC-UHFFFAOYSA-N chloro(trihexyl)silane Chemical compound CCCCCC[Si](Cl)(CCCCCC)CCCCCC WZQSBCHNVPAYOC-UHFFFAOYSA-N 0.000 claims description 8
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 8
- AVYKQOAMZCAHRG-UHFFFAOYSA-N triethoxy(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)silane Chemical compound CCO[Si](OCC)(OCC)CCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F AVYKQOAMZCAHRG-UHFFFAOYSA-N 0.000 claims description 8
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 7
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 7
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- JCTXKRPTIMZBJT-UHFFFAOYSA-N 2,2,4-trimethylpentane-1,3-diol Chemical compound CC(C)C(O)C(C)(C)CO JCTXKRPTIMZBJT-UHFFFAOYSA-N 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 15
- 238000012360 testing method Methods 0.000 description 13
- 239000002245 particle Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 229940089951 perfluorooctyl triethoxysilane Drugs 0.000 description 7
- 239000004965 Silica aerogel Substances 0.000 description 6
- 238000012216 screening Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 5
- 229910000423 chromium oxide Inorganic materials 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 230000005587 bubbling Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910006251 ZrOCl2.8H2O Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
- 238000010626 work up procedure 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
- C09D133/00—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- 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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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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
- C09D7/63—Additives non-macromolecular organic
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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
- C09D7/65—Additives macromolecular
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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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/18—Spheres
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- 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)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a heat-insulating coating and a preparation method thereof, wherein the heat-insulating coating is prepared by taking fluorine-silicon modified acrylate emulsion, styrene-acrylate emulsion, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, sodium hydroxymethyl cellulose, nonylphenol polyoxyethylene ether, functional filler, 3-diaminodiphenyl sulfone, polytrifluoropropylmethylsiloxane, methyl silsesquioxane, a functionalized montmorillonite composite, polyimide microspheres, nano titanium carbide and water as raw materials. The heat-insulating coating has good heat-insulating property and waterproof property, good adhesive force and difficult cracking.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a heat-insulating coating and a preparation method thereof.
Background
The coating is a polymer material which forms a film after being coated on the surface of an object so as to be used for protection and decoration or endow functions of heat resistance, heat preservation, rust prevention and the like. The wall coating can not only decorate the wall body and has aesthetic property, but also protect the wall body from aging, cracking, water seepage, corrosion and other phenomena. In addition, the wall coating can also reflect sunlight and play a certain heat insulation effect. Chinese patent CN106830813A discloses a heat-insulating coating, which comprises the following raw materials: the coating has good heat preservation and insulation effects, but the waterproof and adhesive effects of the coating are not deeply researched.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the present invention is to provide a thermal insulation coating and a preparation method thereof.
A heat-preservation and heat-insulation coating is composed of the following raw materials in parts by weight: 100 parts of fluorine-silicon modified acrylate emulsion, 10-20 parts of styrene-acrylate emulsion, 8-12 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 1-5 parts of sodium hydroxymethyl cellulose, 1-3 parts of nonylphenol polyoxyethylene ether, 15-25 parts of functional filler, 1-5 parts of 3, 3-diaminodiphenyl sulfone, 1-3 parts of polytrifluoropropylmethylsiloxane, 0.5-2 parts of methyl silsesquioxane, 3-8 parts of montmorillonite or functionalized montmorillonite composite, 5-15 parts of polyimide microspheres, 5-12 parts of nano titanium carbide and 40-60 parts of water.
The fluorine-silicon modified acrylate emulsion is used as a substrate, so that the heat-insulating coating has good weather resistance, stain resistance, wear resistance and other properties, and simultaneously forms good hydrophobic property. 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate is used as a film forming agent, so that the plastic flow and the elastic shape of the coating can be promoted, the coalescence performance is improved, and meanwhile, the compactness of the coating can be improved. The nano titanium carbide has extremely low heat conductivity coefficient, effectively inhibits and shields infrared radiation heat and heat conduction, and has good reflection performance due to the hollow structure. The methyl silsesquioxane has excellent lubricity, softness and smoothness, and prevents the coating from agglomerating. The montmorillonite has low heat conductivity coefficient and heat preservation effect, and simultaneously has a layered structure, so that the energy transfer speed and path are reduced in the energy transfer process, and good heat insulation and heat preservation effects are achieved.
The functional filler is modified silicon dioxide aerogel and/or activated carbon.
The preparation method of the modified silicon dioxide aerogel comprises the following steps: drying and crushing the silicon dioxide aerogel, and sieving the silicon dioxide aerogel with a sieve of 80-100 meshes to obtain silicon dioxide aerogel powder; adding silicon dioxide aerogel powder and a silane coupling agent into an ethanol aqueous solution, uniformly mixing, carrying out ultrasonic treatment for 1-2h, wherein the ultrasonic power is 800-1000W, the ultrasonic frequency is 20-25kHz, centrifuging, taking precipitate, and drying to obtain the modified silicon dioxide aerogel, wherein the mass ratio of the silicon dioxide aerogel powder to the silane coupling agent to the ethanol aqueous solution is (10-15): (2-4): (60-80); the ethanol water solution is prepared from anhydrous ethanol and water according to the mass ratio (35-50): (15-20) mixing.
The silane coupling agent is one or two of N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and 1H,1H,2H, 2H-perfluorooctyltriethoxysilane; preferably, the silane coupling agent is N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 1H,2H, 2H-perfluorooctyltriethoxysilane according to the mass ratio of (1-3): (1-3).
The silicon dioxide aerogel is a porous structure with a net structure, contains a plurality of gaps, has a reduced heat conductivity coefficient, and has good heat resistance performance on a coating. The preparation method comprises the following steps of modifying silicon dioxide aerogel by adopting N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and 1H,1H,2H, 2H-perfluorooctyltriethoxysilane, wherein the modified silicon dioxide aerogel contains hydroxyl, wraps the surface of a polyimide microsphere through the action of hydrogen bonds with the polyimide microsphere under the action of emulsion, fills pores of the polyimide microsphere, constructs a multi-layer structure, blocks heat, reflects heat and has good heat insulation performance; on the other hand, 1H,2H, 2H-perfluorooctyltriethoxysilane is adopted to modify the silicon dioxide aerogel, so that the surface energy of the coating is reduced, the hydrophobicity of the coating is improved, and the compatibility with other substances is further improved.
Preferably, the functional filler is prepared from modified silica aerogel and/or modified activated carbon; the functional filler is prepared from modified silicon dioxide aerogel and modified activated carbon according to the mass ratio of (1-3): (1-3) mixing.
The preparation method of the modified activated carbon comprises the following steps:
(1) adding activated carbon into water, and performing ultrasonic treatment for 20-30min, wherein the ultrasonic power is 800-1000W, and the ultrasonic frequency is 20-25kHz, so as to obtain an activated carbon suspension, and the mass ratio of the activated carbon to the water is 80: (100-);
(2) ZrOCl2·8H2Adding O into the activated carbon suspension obtained in the step (1) for ultrasonic treatment for 20-30min, wherein the ultrasonic power is 800-1000W, and the ultrasonic frequency is 20-25kHz, so as to obtain a mixed material; adjusting the pH value of the mixed material to 9-9.5 by using 8-10 wt% of ammonia water, stirring for 3-4h at 400r/min of 200-2·8H2The mass ratio of the O to the active carbon is (3-5): 80;
(3) adding Bi2O3、Y2O3Adding the pretreated activated carbon obtained in the step (2) into a mortar for grinding to obtain mixed powder; drying the mixed powder, heating the dried mixed powder to 800-2O3、Y2O3The mass ratio of the pretreated activated carbon is 1:1: (1-5).
ZrOCl2·8H2Loading O solution in pores of the activated carbon, calcining at high temperature to obtain the zirconia modified activated carbon, and simultaneously adopting Bi2O3、Y2O3Modifying the zirconia modified activated carbon to obtain a modified activated carbon, emitting solar energy into the air by the chromium oxide in a radiation form, and Bi3YO6Having near-infrared reflection properties, chromium oxide and Bi3YO6The synergistic effect has good heat preservation and insulation effects, and the activated carbon is uniformly dispersed.
The preparation method of the functionalized montmorillonite composite comprises the following steps:
mixing montmorillonite and tetrahydrofuran, and then carrying out ultrasonic treatment for 5-10min, wherein the ultrasonic power is 600-800W, the ultrasonic frequency is 20-25kHz, and the mass ratio of the montmorillonite to the tetrahydrofuran is 1 (15-20); adding nano aluminum oxide and nano zinc oxide, and continuing to perform ultrasonic treatment for 20-30min, wherein the mass ratio of the nano aluminum oxide to the nano zinc oxide to the montmorillonite is 1 (1-2) to 5-10; finally adding chlorotrihexylsilane and polyvinyl alcohol, mixing uniformly, stirring for 3-5h at 60-70 ℃ and 300r/min, wherein the mass ratio of the chlorotrihexylsilane to the polyethylene glycol montmorillonite is (1-2) to (2-5) to 50; and filtering, collecting solid, washing with absolute ethyl alcohol, and drying to obtain the functionalized montmorillonite composite.
The preparation method of the heat-preservation and heat-insulation coating comprises the following steps:
adding nonylphenol polyoxyethylene ether, sodium carboxymethylcellulose and methyl silsesquioxane into water, mixing, and stirring at 400r/min for 30-40min at 200-; adding the fluorosilicone modified acrylate emulsion and the styrene-acrylate emulsion into the mixture I, and stirring for 30-40min at the speed of 200-400r/min to obtain a mixture II; adding the functional filler, the nano titanium carbide, the montmorillonite or the functionalized montmorillonite compound and the polyimide microspheres into the mixture II, and stirring for 30-40min at the speed of 200-400r/min to obtain a mixture III; adding 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3-diaminodiphenyl sulfone and polytrifluoropropylmethylsiloxane into the mixture III, and stirring at the speed of 200-.
The invention has the beneficial effects that: the heat-insulating coating has good heat-insulating property and waterproof property, good adhesive force and difficult cracking. The invention adopts the fluorine-silicon modified acrylate emulsion as the substrate, so that the heat-insulating coating has good weather resistance, stain resistance, wear resistance and other properties, and simultaneously forms good hydrophobic property. Adopts silica aerogel, montmorillonite, nano titanium carbide, chromium oxide and Bi3YO6The coating has good heat preservation and heat insulation performance by adopting the modes of obstruction, reflection and radiation.
Detailed Description
The invention is further illustrated below with reference to specific examples. It is to be understood, however, that these examples are illustrative only and are not to be construed as limiting the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the manufacturer.
In the examples, the fluorosilicone modified acrylate emulsion is prepared according to patent 201210013514.1, example 1.
The styrene-acrylate emulsion has the solid content of 40-50%, the viscosity of 80-2000 mPa · s, the monomer residual quantity of 0.5%, the pH value of 8-9, and Shenzhen Shenchun chemical Limited.
2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, CAS: 25265-77-4, bead trades, Inc. of Tokyo, Nanjing.
Nonylphenol polyoxyethylene ether, CAS: 20427-84-3, purity: 98%, Shanghai-derived leaf Biotech, Inc.
3, 3-diaminodiphenyl sulfone, CAS: 599-61-1, Shanghai-derived leaf Biotech, Inc.
Polytrifluoropropylmethylsiloxane, Mw 4600, CAS: 63148-56-1, Hebei Hengjing chemical Co., Ltd.
Methylsilsesquioxane, CAS: 68554-70-1, particle size: 3-4 μm, Guangzhou Patai chemical Co., Ltd.
Montmorillonite, particle size: 0.1-1 μm, Wuhan Carnous technologies, Inc.
The polyimide microspheres in the examples are prepared according to example 3 in Chinese patent 201610247480.0.
Nano titanium carbide, particle size: 40nm, last-sea workup new material technology limited.
Nano alumina, particle size: 30nm, Shanghai Po micro application materials technology, Inc.
Nano zinc oxide, particle size: 20nm, Nanjing Xiancheng nanometer materials science and technology Co.
Polyvinyl alcohol, degree of hydrolysis 88%, 4.5-6.0mPa.s, Beijing Bailingwei science and technology Co.
Chlorotrihexylsilane, CAS: 3634-67-1.
N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, CAS: 1760-24-3.
1H,1H,2H, 2H-perfluorooctyltriethoxysilane, CAS: 51851-37-7.
The silicon dioxide aerogel has a microscopic particle size of 40-60 nm, a macroscopic particle size of 50 um-5 mm and a porosity of 90-98%.
Activated carbon, particle size 400 mesh, Guangzhou Tianjin chemical Co., Ltd.
Example 1
A heat-preservation and heat-insulation coating is composed of the following raw materials in parts by weight: 100 parts of fluorine-silicon modified acrylate emulsion, 15 parts of styrene-acrylate emulsion, 10 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3 parts of sodium hydroxymethyl cellulose, 2 parts of nonylphenol polyoxyethylene ether, 20 parts of functional filler, 2 parts of 3, 3-diaminodiphenyl sulfone, 1.5 parts of polytrifluoropropylmethylsiloxane, 0.5 part of methyl silsesquioxane, 5 parts of montmorillonite, 10 parts of polyimide microspheres, 8 parts of nano titanium carbide and 40 parts of water.
The functional filler is formed by mixing silicon dioxide aerogel and activated carbon according to a mass ratio of 2: 1.
The preparation method of the heat-preservation and heat-insulation coating comprises the following steps:
adding nonylphenol polyoxyethylene ether, sodium carboxymethylcellulose and methyl silsesquioxane into water, mixing, and stirring at 300r/min for 35min to obtain a mixture I; adding the fluorosilicone modified acrylate emulsion and the styrene-acrylate emulsion into the mixture I, and stirring at 300r/min for 35min to obtain a mixture II; adding the functional filler, the nano titanium carbide, the montmorillonite and the polyimide microspheres into the mixture II, and stirring at 300r/min for 35min to obtain a mixture III; adding 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3-diaminodiphenyl sulfone and polytrifluoropropylmethylsiloxane into the mixture III, and stirring at 300r/min for 12min to obtain the heat-insulating coating.
Comparative example 1
Essentially the same as example 1, except that: the functional filler is silicon dioxide aerogel.
Example 2
A heat-preservation and heat-insulation coating is composed of the following raw materials in parts by weight: 100 parts of fluorine-silicon modified acrylate emulsion, 15 parts of styrene-acrylate emulsion, 10 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3 parts of sodium hydroxymethyl cellulose, 2 parts of nonylphenol polyoxyethylene ether, 20 parts of functional filler, 2 parts of 3, 3-diaminodiphenyl sulfone, 1.5 parts of polytrifluoropropylmethylsiloxane, 0.5 part of methyl silsesquioxane, 5 parts of montmorillonite, 10 parts of polyimide microspheres, 8 parts of nano titanium carbide and 40 parts of water.
The functional filler is prepared by mixing modified silicon dioxide aerogel and activated carbon according to a mass ratio of 2: 1. The preparation method of the modified silicon dioxide aerogel comprises the following steps: drying, crushing and screening the silicon dioxide aerogel with a 100-mesh sieve to obtain silicon dioxide aerogel powder; adding silicon dioxide aerogel powder and a silane coupling agent into an ethanol water solution, uniformly mixing, performing ultrasonic treatment for 2 hours, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, centrifuging, taking precipitate, and drying to obtain modified silicon dioxide aerogel, wherein the mass ratio of the silicon dioxide aerogel powder to the silane coupling agent to the ethanol water solution is 15: 2: 60, adding a solvent to the mixture; the ethanol aqueous solution is prepared from absolute ethanol and water according to a mass ratio of 40: 18 are mixed.
The silane coupling agent is N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 1H,2H, 2H-perfluorooctyltriethoxysilane in a mass ratio of 1: 1.
The preparation method of the heat-preservation and heat-insulation coating comprises the following steps: adding nonylphenol polyoxyethylene ether, sodium carboxymethylcellulose and methyl silsesquioxane into water, mixing, and stirring at 300r/min for 35min to obtain a mixture I; adding the fluorosilicone modified acrylate emulsion and the styrene-acrylate emulsion into the mixture I, and stirring at 300r/min for 35min to obtain a mixture II; adding the functional filler, the nano titanium carbide, the montmorillonite and the polyimide microspheres into the mixture II, and stirring at 300r/min for 35min to obtain a mixture III; adding 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3-diaminodiphenyl sulfone and polytrifluoropropylmethylsiloxane into the mixture III, and stirring at 300r/min for 12min to obtain the heat-insulating coating.
Example 3
Essentially the same as example 2, except that:
the preparation method of the modified silicon dioxide aerogel comprises the following steps: drying, crushing and screening the silicon dioxide aerogel with a 100-mesh sieve to obtain silicon dioxide aerogel powder; adding silicon dioxide aerogel powder and a silane coupling agent into an ethanol water solution, uniformly mixing, performing ultrasonic treatment for 2 hours, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, centrifuging, taking precipitate, and drying to obtain modified silicon dioxide aerogel, wherein the mass ratio of the silicon dioxide aerogel powder to the silane coupling agent to the ethanol water solution is 15: 2: 60, adding a solvent to the mixture; the ethanol aqueous solution is prepared from absolute ethanol and water according to a mass ratio of 40: 18 are mixed. The silane coupling agent is N- (2-aminoethyl) -3-aminopropyltrimethoxysilane.
Example 4
Essentially the same as example 2, except that:
the preparation method of the modified silicon dioxide aerogel comprises the following steps: drying, crushing and screening the silicon dioxide aerogel with a 100-mesh sieve to obtain silicon dioxide aerogel powder; adding silicon dioxide aerogel powder and a silane coupling agent into an ethanol water solution, uniformly mixing, performing ultrasonic treatment for 2 hours, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, centrifuging, taking precipitate, and drying to obtain modified silicon dioxide aerogel, wherein the mass ratio of the silicon dioxide aerogel powder to the silane coupling agent to the ethanol water solution is 15: 2: 60, adding a solvent to the mixture; the ethanol aqueous solution is prepared from absolute ethanol and water according to a mass ratio of 40: 18 are mixed. The silane coupling agent is 1H,1H,2H, 2H-perfluorooctyl triethoxysilane.
Example 5
A heat-preservation and heat-insulation coating is composed of the following raw materials in parts by weight: 100 parts of fluorine-silicon modified acrylate emulsion, 15 parts of styrene-acrylate emulsion, 10 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3 parts of sodium hydroxymethyl cellulose, 2 parts of nonylphenol polyoxyethylene ether, 20 parts of functional filler, 2 parts of 3, 3-diaminodiphenyl sulfone, 1.5 parts of polytrifluoropropylmethylsiloxane, 0.5 part of methyl silsesquioxane, 5 parts of montmorillonite, 10 parts of polyimide microspheres, 8 parts of nano titanium carbide and 40 parts of water.
The functional filler is prepared by mixing modified silicon dioxide aerogel and modified activated carbon according to the mass ratio of 2: 1.
The preparation method of the modified silicon dioxide aerogel comprises the following steps: drying, crushing and screening the silicon dioxide aerogel with a 100-mesh sieve to obtain silicon dioxide aerogel powder; adding silicon dioxide aerogel powder and a silane coupling agent into an ethanol water solution, uniformly mixing, performing ultrasonic treatment for 2 hours, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, centrifuging, taking precipitate, and drying to obtain modified silicon dioxide aerogel, wherein the mass ratio of the silicon dioxide aerogel powder to the silane coupling agent to the ethanol water solution is 15: 2: 60, adding a solvent to the mixture; the ethanol aqueous solution is prepared from absolute ethanol and water according to a mass ratio of 40: 18 are mixed.
The silane coupling agent is N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 1H,2H, 2H-perfluorooctyltriethoxysilane in a mass ratio of 1: 1.
The preparation method of the modified activated carbon comprises the following steps:
(1) adding activated carbon into water, and performing ultrasonic treatment for 30min, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, so as to obtain an activated carbon suspension, and the mass ratio of the activated carbon to the water is 80: 100, respectively;
(2) ZrOCl2·8H2Adding O into the activated carbon suspension obtained in the step (1) for ultrasonic treatment for 30min, wherein the ultrasonic power is 800W, and the ultrasonic frequency is 20kHz, so as to obtain a mixed material; adjusting the pH value of the mixed material to 9.4 by adopting 10 wt% ammonia water, stirring for 4h at 300r/min, then placing the mixed material in a reaction kettle, heating to 200 ℃ for reaction for 14h, centrifuging to obtain precipitate after the reaction is finished, and drying to obtain pretreated activated carbon, wherein ZrOCl2·8H2The mass ratio of O to the activated carbon is 5: 80;
(3) adding Bi2O3、Y2O3Step (1)2) Adding the obtained pretreated activated carbon into a mortar for grinding to obtain mixed powder; heating the mixed powder to 800 ℃ for reaction for 2h, and cooling to room temperature to obtain modified activated carbon, wherein the Bi is2O3、Y2O3The mass ratio of the pretreated activated carbon is 1:1: 4.
the preparation method of the heat-preservation and heat-insulation coating comprises the following steps:
adding nonylphenol polyoxyethylene ether, sodium carboxymethylcellulose and methyl silsesquioxane into water, mixing, and stirring at 300r/min for 35min to obtain a mixture I; adding the fluorosilicone modified acrylate emulsion and the styrene-acrylate emulsion into the mixture I, and stirring at 300r/min for 35min to obtain a mixture II; adding the functional filler, the nano titanium carbide, the montmorillonite and the polyimide microspheres into the mixture II, and stirring at 300r/min for 35min to obtain a mixture III; adding 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3-diaminodiphenyl sulfone and polytrifluoropropylmethylsiloxane into the mixture III, and stirring at 300r/min for 12min to obtain the heat-insulating coating.
Example 6
Essentially the same as example 5, except that:
the preparation method of the modified activated carbon comprises the following steps:
(1) adding activated carbon into water, and performing ultrasonic treatment for 30min, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, so as to obtain an activated carbon suspension, and the mass ratio of the activated carbon to the water is 80: 100, respectively;
(2) ZrOCl2·8H2Adding O into the activated carbon suspension obtained in the step (1) for ultrasonic treatment for 30min, wherein the ultrasonic power is 800W, and the ultrasonic frequency is 20kHz, so as to obtain a mixed material; adjusting the pH value of the mixed material to 9.4 by adopting 10 wt% ammonia water, stirring for 4h at 300r/min, then placing the mixed material in a reaction kettle, heating to 200 ℃ for reaction for 14h, centrifuging to obtain precipitate after the reaction is finished, and drying to obtain modified activated carbon, wherein ZrOCl2·8H2The mass ratio of O to the activated carbon is 5: 80.
example 7
Essentially the same as example 5, except that:
the preparation method of the modified activated carbon comprises the following steps:
(1) adding activated carbon into water, and performing ultrasonic treatment for 30min, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, so as to obtain an activated carbon suspension, and the mass ratio of the activated carbon to the water is 80: 100, respectively;
(2) adding Bi2O3、Y2O3Carrying out ultrasonic treatment on the activated carbon suspension in the step (1) for 30min, wherein the ultrasonic power is 800W and the ultrasonic frequency is 20kHz, centrifuging, taking precipitate, and drying to obtain a mixed material; drying the mixed powder, heating the dried mixed powder to 800 ℃ for reaction for 2h, and cooling to room temperature to obtain modified activated carbon, wherein the Bi is2O3、Y2O3And the mass ratio of the activated carbon is 1:1: 4.
example 8
A heat-preservation and heat-insulation coating is composed of the following raw materials in parts by weight: 100 parts of fluorine-silicon modified acrylate emulsion, 15 parts of styrene-acrylate emulsion, 10 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3 parts of sodium hydroxymethyl cellulose, 2 parts of nonylphenol polyoxyethylene ether, 20 parts of functional filler, 2 parts of 3, 3-diaminodiphenyl sulfone, 1.5 parts of polytrifluoropropylmethylsiloxane, 0.5 part of methyl silsesquioxane, 5 parts of functionalized montmorillonite composite, 10 parts of polyimide microspheres, 8 parts of nano titanium carbide and 40 parts of water.
The preparation method of the functionalized montmorillonite composite comprises the following steps:
mixing montmorillonite and tetrahydrofuran, and then carrying out ultrasonic treatment for 5min, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, and the mass ratio of the montmorillonite to the tetrahydrofuran is 1: 15; adding nano aluminum oxide and nano zinc oxide, and continuing to perform ultrasonic treatment for 20min, wherein the mass ratio of the nano aluminum oxide to the nano zinc oxide to the montmorillonite is 1:1: 8; finally adding chlorotrihexylsilane and polyvinyl alcohol, uniformly mixing, stirring at 65 ℃ for 3.5 hours at 300r/min, wherein the mass ratio of the chlorotrihexylsilane to the polyethylene glycol montmorillonite is 1:2: 50; and (3) filtering, collecting the solid, washing for 3 times by using absolute ethyl alcohol, and drying to obtain the functionalized montmorillonite composite.
The functional filler is prepared by mixing modified silicon dioxide aerogel and modified activated carbon according to the mass ratio of 2: 1.
The preparation method of the modified silicon dioxide aerogel comprises the following steps: drying, crushing and screening the silicon dioxide aerogel with a 100-mesh sieve to obtain silicon dioxide aerogel powder; adding silicon dioxide aerogel powder and a silane coupling agent into an ethanol water solution, uniformly mixing, performing ultrasonic treatment for 2 hours, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, centrifuging, taking precipitate, and drying to obtain modified silicon dioxide aerogel, wherein the mass ratio of the silicon dioxide aerogel powder to the silane coupling agent to the ethanol water solution is 15: 2: 60, adding a solvent to the mixture; the ethanol aqueous solution is prepared from absolute ethanol and water according to a mass ratio of 40: 18 are mixed.
The silane coupling agent is N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 1H,2H, 2H-perfluorooctyltriethoxysilane in a mass ratio of 1: 1.
The preparation method of the modified activated carbon comprises the following steps:
(1) adding activated carbon into water, and performing ultrasonic treatment for 30min, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, so as to obtain an activated carbon suspension, and the mass ratio of the activated carbon to the water is 80: 100, respectively;
(2) ZrOCl2·8H2Adding O into the activated carbon suspension obtained in the step (1) for ultrasonic treatment for 30min, wherein the ultrasonic power is 800W, and the ultrasonic frequency is 20kHz, so as to obtain a mixed material; adjusting the pH value of the mixed material to 9.4 by adopting 10 wt% ammonia water, stirring for 4h at 300r/min, then placing the mixed material in a reaction kettle, heating to 200 ℃ for reaction for 14h, centrifuging to obtain precipitate after the reaction is finished, and drying to obtain pretreated activated carbon, wherein ZrOCl2·8H2The mass ratio of O to the activated carbon is 5: 80;
(3) adding Bi2O3、Y2O3Adding the pretreated activated carbon obtained in the step (2) into a mortar for grinding to obtain mixed powder; heating the mixed powder to 800 ℃ for reaction for 2h, and cooling to room temperature to obtain modified activated carbon, wherein the Bi is2O3、Y2O3The mass ratio of the pretreated activated carbon is 1:1: 4.
the preparation method of the heat-preservation and heat-insulation coating comprises the following steps:
adding nonylphenol polyoxyethylene ether, sodium carboxymethylcellulose and methyl silsesquioxane into water, mixing, and stirring at 300r/min for 35min to obtain a mixture I; adding the fluorosilicone modified acrylate emulsion and the styrene-acrylate emulsion into the mixture I, and stirring at 300r/min for 35min to obtain a mixture II; adding the functional filler, the nano titanium carbide, the functionalized montmorillonite compound and the polyimide microspheres into the mixture II, and stirring at 300r/min for 35min to obtain a mixture III; adding 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3-diaminodiphenyl sulfone and polytrifluoropropylmethylsiloxane into the mixture III, and stirring at 300r/min for 12min to obtain the heat-insulating coating. The functionalized montmorillonite composite adopted in example 8 has a large number of hydrophobic groups on the surface; in addition, the functionalized montmorillonite composite has better dispersibility and stronger compatibility with a coating system, and improves the compactness and the hydrophobicity of the coating. The waterproof performance of the thermal insulation coating of example 8 is determined by referring to GB/T1733-: bubbling and cracking appeared on the 25 th day of soaking.
Comparative example 2
A heat-preservation and heat-insulation coating is composed of the following raw materials in parts by weight: 100 parts of fluorine-silicon modified acrylate emulsion, 15 parts of styrene-acrylate emulsion, 10 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3 parts of sodium hydroxymethyl cellulose, 2 parts of nonylphenol polyoxyethylene ether, 20 parts of functional filler, 2 parts of 3, 3-diaminodiphenyl sulfone, 1.5 parts of polytrifluoropropylmethylsiloxane, 0.5 part of methyl silsesquioxane, 5 parts of functionalized montmorillonite composite, 10 parts of polyimide microspheres, 8 parts of nano titanium carbide and 40 parts of water.
The preparation method of the functionalized montmorillonite composite comprises the following steps:
mixing montmorillonite and tetrahydrofuran, and then carrying out ultrasonic treatment for 5min, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, and the mass ratio of the montmorillonite to the tetrahydrofuran is 1: 15; adding nano aluminum oxide and nano zinc oxide, and continuing to perform ultrasonic treatment for 20min, wherein the mass ratio of the nano aluminum oxide to the nano zinc oxide to the montmorillonite is 1:1: 8; and finally stirring for 3.5h at 65 ℃ and 300r/min, filtering, collecting solid, washing for 3 times by using absolute ethyl alcohol, and drying to obtain the functionalized montmorillonite composite.
The functional filler is prepared by mixing modified silicon dioxide aerogel and modified activated carbon according to the mass ratio of 2: 1.
The preparation method of the modified silicon dioxide aerogel comprises the following steps: drying, crushing and screening the silicon dioxide aerogel with a 100-mesh sieve to obtain silicon dioxide aerogel powder; adding silicon dioxide aerogel powder and a silane coupling agent into an ethanol water solution, uniformly mixing, performing ultrasonic treatment for 2 hours, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, centrifuging, taking precipitate, and drying to obtain modified silicon dioxide aerogel, wherein the mass ratio of the silicon dioxide aerogel powder to the silane coupling agent to the ethanol water solution is 15: 2: 60, adding a solvent to the mixture; the ethanol aqueous solution is prepared from absolute ethanol and water according to a mass ratio of 40: 18 are mixed.
The silane coupling agent is N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 1H,2H, 2H-perfluorooctyltriethoxysilane in a mass ratio of 1: 1.
The preparation method of the modified activated carbon comprises the following steps:
(1) adding activated carbon into water, and performing ultrasonic treatment for 30min, wherein the ultrasonic power is 800W, the ultrasonic frequency is 20kHz, so as to obtain an activated carbon suspension, and the mass ratio of the activated carbon to the water is 80: 100, respectively;
(2) ZrOCl2·8H2Adding O into the activated carbon suspension obtained in the step (1) for ultrasonic treatment for 30min, wherein the ultrasonic power is 800W, and the ultrasonic frequency is 20kHz, so as to obtain a mixed material; adjusting the pH value of the mixed material to 9.4 by adopting 10 wt% ammonia water, stirring for 4h at 300r/min, then placing the mixed material in a reaction kettle, heating to 200 ℃, reacting for 14h, centrifuging to take out precipitate after the reaction is finishedPrecipitating and drying to obtain pretreated active carbon ZrOCl2·8H2The mass ratio of O to the activated carbon is 5: 80;
(3) adding Bi2O3、Y2O3Adding the pretreated activated carbon obtained in the step (2) into a mortar for grinding to obtain mixed powder; heating the mixed powder to 800 ℃ for reaction for 2h, and cooling to room temperature to obtain modified activated carbon, wherein the Bi is2O3、Y2O3The mass ratio of the pretreated activated carbon is 1:1: 4.
the preparation method of the heat-preservation and heat-insulation coating comprises the following steps:
adding nonylphenol polyoxyethylene ether, sodium carboxymethylcellulose and methyl silsesquioxane into water, mixing, and stirring at 300r/min for 35min to obtain a mixture I; adding the fluorosilicone modified acrylate emulsion and the styrene-acrylate emulsion into the mixture I, and stirring at 300r/min for 35min to obtain a mixture II; adding the functional filler, the nano titanium carbide, the functionalized montmorillonite compound and the polyimide microspheres into the mixture II, and stirring at 300r/min for 35min to obtain a mixture III; adding 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3-diaminodiphenyl sulfone and polytrifluoropropylmethylsiloxane into the mixture III, and stirring at 300r/min for 12min to obtain the heat-insulating coating. The waterproof property of the thermal insulation coating of the comparative example 2 was measured with reference to GB/T1733-: bubbling and cracking appeared on the 19 th day of soaking.
Test example 1
The thermal conductivity was measured for the thermal insulating coating prepared in examples 1 to 7 and comparative example 1. The heat conductivity coefficient of the paint film at 25 ℃ is detected by referring to GB/T17371-2008 silicate composite heat-insulating paint.
TABLE 1 Heat conductivity coefficient test results of thermal insulation coating
| Thermal conductivity (W/(mK)) | |
| Example 1 | 0.086 |
| Example 2 | 0.053 |
| Example 3 | 0.059 |
| Example 4 | 0.084 |
| Example 5 | 0.037 |
| Example 6 | 0.047 |
| Example 7 | 0.043 |
| Comparative example 1 | 0.104 |
Test example 2
The heat-insulating coatings prepared in examples 1 to 7 and comparative example 1 were subjected to tests of solar reflectance, hemispherical emissivity and heat-insulating temperature difference.
The solar reflectance and hemispherical emissivity of the paint film are detected according to JG/T1040-.
1. Testing of solar reflectance:
the test method comprises the following steps: coating by adopting a flat coating type F, selecting an aluminum alloy plate with the size of 150mm multiplied by 70mm multiplied by 1mm and 3 test plates, fully stirring and uniformly mixing the heat-insulating coating in a container, coating the surface of the aluminum alloy plate by a coater or a scraper in two steps, wherein the thickness of a dry film of the coating is 0.20mm, and the coating is required to be flat and free from defects such as bubbles, cracks and the like. The time interval of the two coating steps is 6 hours, and the curing time is 168 hours.
The procedure for measuring the solar reflectance was tested with respect to the spectroscopic method 1 in appendix A of JG/T1040-2020 Heat reflective insulating paint for exterior surfaces of buildings.
2. Testing hemispherical emissivity:
the test method comprises the following steps: coating by adopting a flat coating type F, selecting an aluminum alloy plate with the size of 150mm multiplied by 70mm multiplied by 1mm and 3 test plates, fully stirring and uniformly mixing the heat-insulating coating in a container, coating the surface of the aluminum alloy plate by a coater or a scraper in two steps, wherein the thickness of a dry film of the coating is 0.20mm, and the coating is required to be flat and free from defects such as bubbles, cracks and the like. The time interval of the two coating steps is 6 hours, and the curing time is 168 hours.
Testing procedure of hemispherical emissivity JG/T1040-.
Table 2 test results of solar reflectance and hemispherical emissivity of the thermal insulation coating.
| Solar reflectance/%) | Hemispherical emissivity/%) | |
| Example 1 | 67.16 | 80 |
| Example 2 | 74.89 | 88 |
| Example 3 | 71.25 | 86 |
| Example 4 | 68.48 | 82 |
| Example 5 | 81.64 | 92 |
| Example 6 | 77.15 | 90 |
| Example 7 | 79.32 | 91 |
| Comparative example 1 | 64.74 | 78 |
Test example 3
The insulation temperature difference test was performed on the insulation coatings prepared in examples 1 to 7 and comparative example 1. Reference to the test examples of the thermal insulation temperature difference (SiO)2Aerogel in reflective heat insulation coatingApplication of (d), liweisheng, master thesis, shenyang university of construction) was tested.
Table 3 test results of the insulation temperature difference of the thermal insulation coating.
Examples 5-7 comparison shows that example 5 uses ZrOCl2.8H2O、Bi2O3、Y2O3ZrOCl used as raw material for modifying active carbon and obviously improving heat conductivity coefficient in heat-insulating coating2.8H2O or Bi2O3And Y2O3The modified active carbon also has certain heat preservation and insulation effects, but the two methods obviously improve the heat preservation and insulation performance of the coating, thereby improving the heat conductivity coefficient of the coating. The possible reasons for this are: ZrOCl2.8H2Loading O solution in pores of the activated carbon, calcining at high temperature to obtain the zirconia modified activated carbon, and simultaneously adopting Bi2O3、Y2O3Modifying the zirconia modified activated carbon to obtain a modified activated carbon, emitting solar energy into the air by the chromium oxide in a radiation form, and Bi3YO6Having near-infrared reflection properties, chromium oxide and Bi3YO6The synergistic effect has good heat preservation and insulation effects, and the activated carbon is uniformly dispersed.
The comparison of the examples 1 to 4 shows that the examples adopt N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and 1H,1H,2H, 2H-perfluorooctyltriethoxysilane to modify the silica aerogel simultaneously, so that the heat preservation and insulation performance of the silica aerogel is remarkably improved, and the silica aerogel has a synergistic effect. The possible reasons for this are: the silicon dioxide aerogel is a porous structure with a net structure, contains a plurality of gaps, has a reduced heat conductivity coefficient, and has good heat resistance performance on a coating. The preparation method comprises the following steps of modifying silicon dioxide aerogel by adopting N- (2-aminoethyl) -3-aminopropyltrimethoxysilane and 1H,1H,2H, 2H-perfluorooctyltriethoxysilane, wherein the modified silicon dioxide aerogel contains hydroxyl, wraps the surface of a polyimide microsphere through the action of hydrogen bonds with the polyimide microsphere under the action of emulsion, fills pores of the polyimide microsphere, constructs a multi-layer structure, blocks heat, reflects heat and has good heat insulation performance; on the other hand, 1H,2H, 2H-perfluorooctyltriethoxysilane is adopted to modify the silicon dioxide aerogel, so that the surface energy of the coating is reduced, the hydrophobicity of the coating is improved, and the compatibility with other substances is further improved.
Comparing example 1 with example 1, it is found that example 1 has good heat preservation and insulation performance, the silica aerogel and the activated carbon interact to enable the particles to protrude outwards, and the activated carbon and the silica aerogel contain porous structures to further block penetration of solar radiation energy and have heat reflection and insulation performance.
Claims (7)
1. The heat-preservation and heat-insulation coating is characterized by comprising the following raw materials in parts by weight: 100 parts of fluorine-silicon modified acrylate emulsion, 10-20 parts of styrene-acrylate emulsion, 8-12 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 1-5 parts of sodium hydroxymethyl cellulose, 1-3 parts of nonylphenol polyoxyethylene ether, 15-25 parts of functional filler, 1-5 parts of 3, 3-diaminodiphenyl sulfone, 1-3 parts of polytrifluoropropylmethylsiloxane, 0.5-2 parts of methyl silsesquioxane, 3-8 parts of functionalized montmorillonite composite, 5-15 parts of polyimide microspheres, 5-12 parts of nano titanium carbide and 40-60 parts of water.
2. The heat-insulating coating as claimed in claim 1, wherein the preparation method of the functionalized montmorillonite composite comprises the following steps:
mixing montmorillonite and tetrahydrofuran, and then carrying out ultrasonic treatment for 5-10min, wherein the ultrasonic power is 600-800W, the ultrasonic frequency is 20-25kHz, and the mass ratio of the montmorillonite to the tetrahydrofuran is 1 (15-20); adding nano aluminum oxide and nano zinc oxide, and continuing to perform ultrasonic treatment for 20-30min, wherein the mass ratio of the nano aluminum oxide to the nano zinc oxide to the montmorillonite is 1 (1-2) to 5-10; finally adding chlorotrihexylsilane and polyvinyl alcohol, mixing uniformly, stirring for 3-5h at 60-70 ℃ and 300r/min, wherein the mass ratio of the chlorotrihexylsilane to the polyethylene glycol montmorillonite is (1-2) to (2-5) to 50; and filtering, collecting solid, washing with absolute ethyl alcohol, and drying to obtain the functionalized montmorillonite composite.
3. A thermal insulating coating according to claim 1, characterized in that the functional filler is modified silica aerogel and/or modified activated carbon.
4. The heat-preservation and heat-insulation coating as claimed in claim 3, wherein the preparation method of the modified silica aerogel comprises the following steps: drying and crushing the silicon dioxide aerogel, and sieving the silicon dioxide aerogel with a sieve of 80-100 meshes to obtain silicon dioxide aerogel powder; adding silicon dioxide aerogel powder and a silane coupling agent into an ethanol aqueous solution, uniformly mixing, carrying out ultrasonic treatment for 1-2h, wherein the ultrasonic power is 800-1000W, the ultrasonic frequency is 20-25kHz, centrifuging, taking precipitate, and drying to obtain the modified silicon dioxide aerogel, wherein the mass ratio of the silicon dioxide aerogel powder to the silane coupling agent to the ethanol aqueous solution is (10-15): (2-4): (60-80); the ethanol water solution is prepared from anhydrous ethanol and water according to the mass ratio (35-50): (15-20) mixing.
5. A heat preservation and insulation coating as claimed in claim 3, characterized in that the preparation method of the modified activated carbon comprises the following steps:
(1) adding activated carbon into water, and performing ultrasonic treatment for 20-30min, wherein the ultrasonic power is 800-1000W, and the ultrasonic frequency is 20-25kHz, so as to obtain an activated carbon suspension, and the mass ratio of the activated carbon to the water is 80: (100-);
(2) ZrOCl2·8H2Adding O into the activated carbon suspension obtained in the step (1) for ultrasonic treatment for 20-30min, wherein the ultrasonic power is 800-1000W, the ultrasonic frequency is 20-25kHz,obtaining a mixed material; adjusting the pH value of the mixed material to 9-9.5 by using 8-10 wt% of ammonia water, stirring for 3-4h at 400r/min of 200-2·8H2The mass ratio of the O to the active carbon is (3-5): 80;
(3) adding Bi2O3、Y2O3Adding the pretreated activated carbon obtained in the step (2) into a mortar for grinding to obtain mixed powder; drying the mixed powder, heating the dried mixed powder to 800-2O3、Y2O3The mass ratio of the pretreated activated carbon is 1:1: (1-5).
6. A heat-insulating coating as claimed in claim 4, wherein the silane coupling agent is one or two of (3- (2-aminoethylamino) propyltrimethoxysilane and 1H,1H,2H, 2H-perfluorooctyltriethoxysilane.
7. The method for preparing a heat-insulating coating as claimed in any one of claims 1 to 6, characterized by comprising the steps of:
adding nonylphenol polyoxyethylene ether, sodium carboxymethylcellulose and methyl silsesquioxane into water, mixing, and stirring at 400r/min for 30-40min at 200-; adding the fluorosilicone modified acrylate emulsion and the styrene-acrylate emulsion into the mixture I, and stirring for 30-40min at the speed of 200-400r/min to obtain a mixture II; adding the functional filler, the nano titanium carbide, the functionalized montmorillonite compound and the polyimide microspheres into the mixture II, and stirring for 30-40min at the speed of 200-; adding 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 3-diaminodiphenyl sulfone and polytrifluoropropylmethylsiloxane into the mixture III, and stirring at the speed of 200-.
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