CN113150622A - Photocatalyst coating with heat preservation performance and preparation method thereof - Google Patents
Photocatalyst coating with heat preservation performance and preparation method thereof Download PDFInfo
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- CN113150622A CN113150622A CN202110435926.3A CN202110435926A CN113150622A CN 113150622 A CN113150622 A CN 113150622A CN 202110435926 A CN202110435926 A CN 202110435926A CN 113150622 A CN113150622 A CN 113150622A
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- 238000000576 coating method Methods 0.000 title claims abstract description 73
- 239000011248 coating agent Substances 0.000 title claims abstract description 71
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 50
- 238000004321 preservation Methods 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 38
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 77
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 65
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 46
- 229920001400 block copolymer Polymers 0.000 claims abstract description 43
- 239000012782 phase change material Substances 0.000 claims abstract description 43
- 229920000642 polymer Polymers 0.000 claims abstract description 42
- 239000010931 gold Substances 0.000 claims abstract description 39
- 229910052737 gold Inorganic materials 0.000 claims abstract description 39
- 239000002131 composite material Substances 0.000 claims abstract description 37
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002270 dispersing agent Substances 0.000 claims abstract description 27
- 239000000839 emulsion Substances 0.000 claims abstract description 27
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 23
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 23
- -1 polysiloxane Polymers 0.000 claims abstract description 22
- 125000002091 cationic group Chemical group 0.000 claims abstract description 17
- 239000003960 organic solvent Substances 0.000 claims abstract description 15
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 15
- 238000009736 wetting Methods 0.000 claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 50
- 229920006264 polyurethane film Polymers 0.000 claims description 48
- 238000003756 stirring Methods 0.000 claims description 48
- 239000012188 paraffin wax Substances 0.000 claims description 43
- 239000000203 mixture Substances 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 31
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 30
- 238000005507 spraying Methods 0.000 claims description 26
- 239000004965 Silica aerogel Substances 0.000 claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 23
- 239000000047 product Substances 0.000 claims description 21
- 239000008367 deionised water Substances 0.000 claims description 20
- 229910021641 deionized water Inorganic materials 0.000 claims description 20
- 239000006185 dispersion Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000003094 microcapsule Substances 0.000 claims description 17
- 238000009413 insulation Methods 0.000 claims description 15
- NYZBIZMUAMEOSB-UHFFFAOYSA-M methyl 2-methylprop-2-enoate;trimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azanium;chloride Chemical compound [Cl-].COC(=O)C(C)=C.CC(=C)C(=O)OCC[N+](C)(C)C NYZBIZMUAMEOSB-UHFFFAOYSA-M 0.000 claims description 12
- 229920002635 polyurethane Polymers 0.000 claims description 12
- 239000004814 polyurethane Substances 0.000 claims description 12
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 239000011812 mixed powder Substances 0.000 claims description 10
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 10
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 10
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 10
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 9
- 238000007731 hot pressing Methods 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 239000012300 argon atmosphere Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 5
- 239000001509 sodium citrate Substances 0.000 claims description 5
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- 239000003999 initiator Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 239000013530 defoamer Substances 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 2
- 239000003431 cross linking reagent Substances 0.000 claims description 2
- UWJJYHHHVWZFEP-UHFFFAOYSA-N pentane-1,1-diol Chemical compound CCCCC(O)O UWJJYHHHVWZFEP-UHFFFAOYSA-N 0.000 claims description 2
- 230000001476 alcoholic effect Effects 0.000 claims 3
- 239000007921 spray Substances 0.000 claims 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 2
- 230000037303 wrinkles Effects 0.000 claims 2
- 229920001577 copolymer Polymers 0.000 claims 1
- 239000004408 titanium dioxide Substances 0.000 claims 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 239000004964 aerogel Substances 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 3
- 238000005034 decoration Methods 0.000 abstract description 2
- 238000005201 scrubbing Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 description 28
- 235000019441 ethanol Nutrition 0.000 description 22
- 238000005457 optimization Methods 0.000 description 13
- 239000011247 coating layer Substances 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- COEYXIBLSAIEKV-UHFFFAOYSA-N titanium dihydride Chemical compound [TiH2] COEYXIBLSAIEKV-UHFFFAOYSA-N 0.000 description 4
- 229910000048 titanium hydride Inorganic materials 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000004971 Cross linker Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010998 test method 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
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated 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
- C09D5/38—Paints containing free metal not provided for above in groups C09D5/00 - C09D5/36
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0831—Gold
-
- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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)
- Catalysts (AREA)
Abstract
The invention discloses a photocatalyst coating with heat preservation performance and a preparation method thereof, and the photocatalyst coating comprises the following raw materials in parts by weight: 15-30 parts of polymer emulsion, 5-8 parts of cationic block copolymer, 1-5 parts of alcohol organic solvent, 1-2 parts of nano titanium dioxide, 0.1-0.5 part of nano gold, 1-3 parts of silicon dioxide aerogel, 5-8 parts of polysiloxane block copolymer, 0.1-0.3 part of wetting dispersant, 18-20 parts of heavy calcium carbonate, 0.2-0.4 part of defoaming agent, 10-20 parts of water, polyvinyl alcohol composite powder and phase change material. The photocatalyst coating disclosed by the invention is an environment-friendly coating with a heat preservation effect, better water resistance and scrubbing resistance, does not crack or fall off after being exposed in air for a long time, has a stronger formaldehyde removal effect, and is suitable for decoration of indoor wall surfaces, interiors of vehicles and roofs.
Description
Technical Field
The invention relates to the technical field of new coatings, in particular to a photocatalyst coating with heat preservation performance and a preparation method thereof.
Background
With the development of the automobile industry, people in China increasingly own automobiles, the air pollution treatment becomes the most important factor, and a large amount of funds are invested in the air treatment of the country. At present, the automobile is a large mobile group and has direct influence on the environment, so that the automobile development and the environmental protection become two major factors which are mutually restricted and mutually promoted. The automobile has the characteristic of continuous movement due to the application of the automobile, the internal environment of the automobile is very easily influenced under different temperature conditions, the automobile air conditioner and the internal circulation are started until the automobile air conditioner needs a certain buffer time to be effective, driving or riding is not comfortable, the oil consumption is considerable when the automobile air conditioner runs for a long time in hot and cold seasons, high temperature is caused by long-time insolation, the volatilization speed of harmful gas in the automobile is accelerated, the human health is influenced, the internal wall coating can also be used as a ceiling coating, the main function of the internal wall coating is to decorate and protect the wall surface and the ceiling of the internal wall, and an attractive and comfortable living environment is established. The interior wall coating should have the following properties: the color is rich, fine and coordinated; the alkali resistance and the water resistance are good, and the pulverization is not easy to happen; good air permeability, moisture absorption and moisture removal; the coating is convenient to brush and has good recoatability; no toxicity and no pollution. However, the interior wall coating in the prior art does not have the effects of heat insulation and heat preservation.
Patent 201710683055.0 uses: 15-30 parts of polymer emulsion, 5-8 parts of cationic block copolymer, 1-5 parts of alcohol organic solvent, 1-2 parts of nano titanium dioxide, 0.1-0.5 part of nano gold, 1-3 parts of silicon dioxide aerogel, 5-8 parts of polysiloxane block copolymer, 0.1-0.3 part of wetting dispersant, 18-20 parts of heavy calcium carbonate, 0.2-0.4 part of defoaming agent and 10-20 parts of water. The photocatalyst coating disclosed by the invention is an environment-friendly coating with excellent water resistance and scrubbing resistance, does not crack or fall off after being exposed in air for a long time, has a strong formaldehyde removing effect, and is suitable for decoration of indoor walls; however, the coating material does not have the function of heat insulation, and the heat insulation effect in various regions is very important and has practical value.
The existing photocatalyst coating has the problems that: whether the addition of the silica aerogel enables the photocatalyst coating to have a heat preservation effect is not considered, and if the heat preservation effect is generated, the heat preservation and insulation performance can be further improved.
Disclosure of Invention
The invention aims to provide a photocatalyst coating with heat preservation performance and a preparation method thereof, and aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a photocatalyst coating with heat preservation performance mainly comprises the following components in parts by weight: 15-30 parts of polymer emulsion, 5-8 parts of cationic block copolymer, 1-5 parts of alcohol organic solvent, 1-2 parts of nano titanium dioxide, 0.1-0.5 part of nano gold, 1-3 parts of silica aerogel, 5-8 parts of polysiloxane block copolymer, 0.1-0.3 part of wetting dispersant, 18-20 parts of heavy calcium carbonate, 0.2-0.4 part of defoaming agent and 10-20 parts of water; the photocatalyst coating with the heat preservation performance is characterized by further comprising the following raw material components in parts by weight: 20-30 parts of polyvinyl alcohol composite powder and 10-20 parts of phase change material.
As optimization, the polyvinyl alcohol compound powder is prepared by forming a film on a modified polyurethane film by using a polyvinyl alcohol compound solution, and then removing the film, hot-pressing and crushing.
As optimization, the polyvinyl alcohol compound solution is prepared from nano gold and polyvinyl alcohol crosslinked by pentanediol; the modified polyurethane film is prepared by uniformly spraying the folded laminar object on the polyurethane film.
Preferably, the phase change material is made of paraffin and polystyrene.
As optimization, the polymer emulsion is styrene-acrylic emulsion; the cationic block copolymer is any one of cationic block copolymers containing methyl methacrylate blocks, preferably methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymers; the alcohol organic solvent is ethanol and/or methanol;
for optimization, the particle size of the nano titanium dioxide is 20-40 nm; the particle size of the nano gold is 10-20 nm; the defoaming agent is CF-16; the wetting dispersant is a dispersant SN-5040; the pore size of the silicon dioxide aerogel is 80-100 nm, the porosity is 90-94%, and the dry density is 40-100 kg/m3The thermal conductivity coefficient is 0.010-0.025W/(m.K); the polysiloxane block copolymer is a polysiloxane-polyurethane block copolymer.
As optimization, the preparation method of the photocatalyst coating with the heat preservation performance mainly comprises the following preparation steps:
(1) mixing the wrinkled laminar dispersion liquid with ethanol to obtain wrinkled laminar spraying liquid, fixing a polyurethane film on a funnel, sealing the outer side of the funnel, blowing air into the funnel at a constant speed, spraying the bulged polyurethane film by using the wrinkled laminar spraying liquid when the polyurethane film is blown to a certain height, and drying after spraying to obtain a modified polyurethane film;
(2) the shape polymer solution with the light driving property is prepared by mixing the following components in a volume ratio of 3:1, spraying the mixture on a modified polyurethane film, standing for 36 hours at normal temperature, and removing the film to obtain a polyvinyl alcohol composite film;
(3) hot-pressing the polyvinyl alcohol composite film for 3-10 min at the temperature of 80-100 ℃ and the pressure of 1-3 MPa to form a modified polyvinyl alcohol composite film, and crushing the modified polyvinyl alcohol composite film to obtain polyvinyl alcohol composite powder;
(4) weighing the following components in parts by weight: 15-30 parts of polymer emulsion, 5-8 parts of cationic block copolymer, 1-5 parts of alcohol organic solvent, 1-2 parts of nano titanium dioxide, 0.1-0.5 part of nano gold, 1-3 parts of silica aerogel, 5-8 parts of polysiloxane block copolymer, 0.1-0.3 part of wetting dispersant, 18-20 parts of heavy calcium carbonate, 0.2-0.4 part of defoamer, 10-20 parts of water, 20-30 parts of polyvinyl alcohol composite powder and 10-20 parts of phase change material, adding water, polymer emulsion, cationic block copolymer, polysiloxane block copolymer, alcohol organic solvent, wetting dispersant, phase change material and polyvinyl alcohol composite powder into a stirrer, stirring uniformly, then adding nano titanium dioxide, silica aerogel, heavy calcium carbonate and defoamer, and stirring uniformly to obtain a coating; and pouring the coating into a polytetrafluoroethylene mold, and curing for 36 hours at room temperature to obtain the photocatalyst coating with the thickness of 1-2 mm and heat preservation performance.
Optimally, the preparation method of the wrinkled laminar dispersion liquid in the step (1) comprises the steps of mixing titanium dihydride powder, aluminum powder and graphite powder in a molar ratio of 3:1.1:2, carrying out ball milling to obtain mixed powder, placing the mixed powder in an argon atmosphere, sintering for 2 hours at 1400 ℃ to obtain a laminar, mixing hydrochloric acid and fluorine in a beaker in a mass ratio of 1: 1-4: 1, adding a laminar with 0.2-0.8 times of the mass of the hydrochloric acid into the beaker, stirring and reacting for 2 hours under a water bath condition at 30 ℃, adjusting the pH value of materials in the beaker to be neutral, filtering to obtain a wrinkled laminar, mixing the wrinkled laminar with water in a mass ratio of 1:5 in the flask, introducing argon gas into the flask at a rate of 5-15 mL/min, carrying out ultrasonic treatment for 1 hour under the ultrasonic action of a probe with 150W to obtain a wrinkled laminar mixed liquid, centrifuging and separating the wrinkled mixed liquid for 5-10 minutes under the condition that the rotating speed is 3500-5000 r/min, and then carrying out centrifugal separation for 5-10 minutes Taking supernatant liquor to obtain a wrinkled laminar dispersion liquid; the thickness of the polyurethane film in the step (1) is 0.5-0.8 mm;
as an optimization, the preparation method of the shape polymer solution with the light driving property in the step (2) comprises the following steps: adding 100mL of chloroauric acid aqueous solution with the mass fraction of 0.01% into a 250mL round-bottom flask, heating to 95-100 ℃ in a water bath environment, rapidly stirring, simultaneously adding 3.5mL of sodium citrate aqueous solution with the mass fraction of 1%, continuously heating and stirring for 15-20 min, stopping heating, continuously stirring for 30-35 min, standing to obtain wine red nano gold sol, naturally cooling at room temperature to obtain nano gold solution, and storing in an environment at 4 ℃; adding deionized water into polyvinyl alcohol powder according to the mass ratio of 1:14, and swelling for 2 hours in a water bath at 90-95 ℃ to obtain a polyvinyl alcohol solution; mixing the polyvinyl alcohol solution and the nano gold solution according to the volume ratio of 1:1, stirring and stirring uniformly, and then adding 10% hydrochloric acid to adjust the pH value to 3.5-4 to obtain a mixed solution; and glutaraldehyde crosslinking agent with concentration of 50% and with volume of 0.007-0.008 times of the mixture is added, and after stirring for 2h at room temperature, bubbles are removed under vacuum condition to obtain a shape polymer solution with light driving property.
As an optimization, the phase change material in the step (4) is a polystyrene-paraffin phase change microcapsule, and the preparation method of the polystyrene-paraffin phase change microcapsule comprises the following steps: adding paraffin, polyvinylpyrrolidone, deionized water and absolute ethyl alcohol into a three-neck flask, wherein the paraffin accounts for 14-44 parts, the polyvinylpyrrolidone accounts for 5-8 parts, the deionized water accounts for 60-75 parts, and the absolute ethyl alcohol accounts for 15-20 parts, then heating the materials in the three-neck flask to 80 ℃, stirring and mixing to obtain a paraffin mixture, and adding polyacrylamide accounting for 2-5% of the volume of the paraffin mixture when the paraffin mixture becomes colorless liquid; adding 9% of styrene in volume of the paraffin mixture and 0.1% of azodiisobutyronitrile in volume of the paraffin mixture after 10-30 minutes; fixing the reaction temperature at 80 ℃, reacting for 22 hours to obtain a phase-change material solution, and washing the phase-change material solution with deionized water for 6-8 times to obtain the phase-change material.
Compared with the prior art, the invention has the beneficial effects that:
the invention uses polyvinyl alcohol compound powder and phase-change microcapsule when preparing photocatalyst coating with heat preservation performance.
The polyvinyl alcohol composite powder is prepared by crosslinking nano gold and polyvinyl alcohol, the nano gold has the function of improving the dispersion, and the dispersion of the nano titanium dioxide can be improved after the nano gold is added into a product, so that the product has good formaldehyde adsorption and degradation capacity, and the polyvinyl alcohol composite powder can be uniformly dispersed in the product under the action of the nano gold; after the polyvinyl alcohol compound powder is added into a product, the polyvinyl alcohol compound powder has light driving performance, when the product contacts a light source, a lamellar structure can be converted into a corrugated structure, so that a gap is generated inside a coating, the heat insulation performance of the product is further improved, and when the lamellar structure is converted into the corrugated structure, the polyvinyl alcohol compound can extrude other components inside the product, so that the density of the product is improved, and the impact resistance of the product is further improved;
the phase-change microcapsule is added in the manufacturing process of the coating, the heat preservation performance of the product can be further improved due to the addition of the phase-change microcapsule, the microcapsule of the phase-change microcapsule is crushed along with the wrinkling of the polyvinyl alcohol composite powder, paraffin in the crushed microcapsule is liquefied under the illumination condition and enters pores formed by the wrinkling to form a heat preservation layer, and the heat preservation performance of the product is improved; meanwhile, the paraffin is liquefied and extruded into the heat insulation layer formed in the folds, so that the condition that the product is broken due to impact caused by the increase of porosity can be prevented, and the impact resistance of the product is further improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to more clearly illustrate the method provided by the present invention, the following examples are provided to illustrate the method of testing each index of the photocatalyst coating with heat retaining property, which is prepared in the following examples, as follows:
thermal insulation performance: the thermal conductivity of the photocatalyst coating with heat preservation performance obtained in each example and the thermal conductivity of a comparative product are tested by adopting a hot shielding plate method according to the GB/T10294 standard.
Impact resistance: the impact resistance of the photocatalyst coating with heat preservation performance obtained in each example and the impact resistance of a comparative product are measured and tested according to GB/T1732 standard and a paint film impact resistance measuring method.
Example 1
A photocatalyst coating with heat preservation performance mainly comprises the following components in parts by weight: 20 parts of a styrene-acrylic emulsion, 5 parts of methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymer, 3 parts of ethanol, 2 parts of nano titanium dioxide, 0.5 part of nano gold, 3 parts of silica aerogel, 8 parts of polysiloxane-polyurethane block copolymer, 0.1 part of a dispersing agent SN-5040, 20 parts of heavy calcium carbonate, 0.4 part of a defoaming agent CF-16, 20 parts of water, 25 parts of polyvinyl alcohol composite powder and 20 parts of a phase change material.
A preparation method of a photocatalyst coating with heat preservation performance mainly comprises the following preparation steps:
(1) mixing the folded laminar dispersion liquid with absolute ethyl alcohol according to a volume ratio of 1:5 to obtain folded laminar spraying liquid, fixing a polyurethane film on a funnel with the diameter of 6cm, sealing the outer side of the polyurethane film, simultaneously blowing air into the funnel at a constant speed of 8mL/min, spraying the bulged polyurethane film with the folded laminar spraying liquid with the mass of 10 times that of the polyurethane film when the polyurethane film is blown to be 4cm, controlling the spraying speed to be 2mL/min, obtaining a modified polyurethane film blank after the spraying is finished, and drying the modified polyurethane film blank at the temperature of 70 ℃ for 30min to obtain the modified polyurethane film;
(2) the shape polymer solution with the light driving property is prepared by mixing the following components in a volume ratio of 3:1, spraying the mixture on a modified polyurethane film, standing for 36 hours at normal temperature, and removing the film to obtain a polyvinyl alcohol composite film;
(3) hot-pressing the polyvinyl alcohol composite film for 5min at the temperature of 90 ℃ and the pressure of 3MPa to form a modified polyvinyl alcohol composite film, and crushing the modified polyvinyl alcohol composite film to obtain polyvinyl alcohol composite powder;
(4) weighing the following components in parts by weight: 20 parts of styrene-acrylic emulsion, 5 parts of methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymer, 3 parts of ethanol, 2 parts of nano titanium dioxide, 0.5 part of nano gold, 3 parts of silica aerogel, 8 parts of polysiloxane-polyurethane block copolymer, 0.1 part of dispersing agent SN-5040, 20 parts of heavy calcium carbonate, 0.4 part of defoaming agent CF-16, 20 parts of water, 25 parts of polyvinyl alcohol compound powder and 20 parts of phase change material, wherein water, polymer emulsion, cationic block copolymer, polysiloxane block copolymer, alcohol organic solvent, wetting dispersing agent, phase change material and polyvinyl alcohol compound powder are added into a stirrer, nano titanium dioxide, silica aerogel, heavy calcium carbonate and defoaming agent are added after uniform stirring, and the coating is obtained after uniform stirring; and pouring the coating into a polytetrafluoroethylene mold, and curing for 36 hours at room temperature to obtain the photocatalyst coating with the thickness of 1mm and heat preservation performance.
Optimally, the preparation method of the wrinkled laminar dispersion liquid in the step (1) comprises the steps of mixing titanium dihydride powder, aluminum powder and graphite powder according to a molar ratio of 3:1.1:2, carrying out ball milling to obtain mixed powder, placing the mixed powder in an argon atmosphere, sintering for 2 hours at the temperature of 1400 ℃ to obtain a laminar, mixing hydrochloric acid and fluorine according to a mass ratio of 2:1 in a beaker, adding a laminar with 0.6 times of the mass of the hydrochloric acid into the beaker, stirring and reacting for 2 hours under the water bath condition of 30 ℃, adjusting the pH value of materials in the beaker to be neutral, filtering to obtain a wrinkled laminar, mixing the wrinkled laminar with water according to a mass ratio of 1:5 in the flask, introducing argon gas into the flask at a rate of 8mL/min, carrying out ultrasonic treatment for 1 hour under the ultrasonic action of a probe with the power of 150W to obtain a wrinkled laminar mixed liquid, carrying out centrifugal separation for 6 minutes under the rotating speed of 4000r/min to obtain a wrinkled laminar mixed liquid, taking the supernatant to obtain a wrinkled laminar dispersion; the thickness of the polyurethane film in the step (1) is 0.6 mm.
As an optimization, the preparation method of the shape polymer solution with the light driving property in the step (2) comprises the following steps: adding 100mL of chloroauric acid aqueous solution with the mass fraction of 0.01% into a 250mL round-bottom flask, heating to 98 ℃ in a water bath environment, rapidly stirring, simultaneously adding 3.5mL of sodium citrate aqueous solution with the mass fraction of 1%, continuously heating and stirring for 18min, stopping heating, continuously stirring for 32min, standing to finally obtain wine red nano gold sol, naturally cooling at room temperature to obtain nano gold solution, and storing in an environment at 4 ℃; adding deionized water into polyvinyl alcohol powder according to the mass ratio of 1:14, and swelling for 2 hours in a water bath at the temperature of 92 ℃ to obtain a polyvinyl alcohol solution; mixing the polyvinyl alcohol solution and the nano gold solution according to the volume ratio of 1:1, stirring uniformly, and adding 10% hydrochloric acid to adjust the pH value to 3.8 to obtain a mixed solution; and glutaraldehyde crosslinker with concentration of 50% at 0.008 times the volume of the mixture was added, and after stirring at room temperature for 2 hours, bubbles were removed under vacuum to obtain a shaped polymer solution with light-driving properties.
As an optimization, the phase-change material in the step (4) is a polystyrene-paraffin phase-change microcapsule, and the preparation method of the polystyrene-paraffin phase-change microcapsule comprises the steps of adding paraffin, polyvinylpyrrolidone, deionized water and absolute ethyl alcohol into a three-neck flask, wherein the paraffin accounts for 15 parts, the polyvinylpyrrolidone accounts for 6 parts, the deionized water accounts for 64 parts, and the absolute ethyl alcohol accounts for 15 parts, heating the materials in the three-neck flask to 80 ℃, stirring and mixing to obtain a paraffin mixture, and adding polyacrylamide accounting for 2% of the volume of the paraffin mixture when the paraffin mixture becomes colorless liquid; after 20 minutes, 9% by volume of styrene and 0.1% by volume of initiator azobisisobutyronitrile were added to the mixture; fixing the reaction temperature at 80 ℃, reacting for 22h to obtain a phase-change material solution, and washing the phase-change material solution with deionized water for 8 times to obtain the phase-change material.
Example 2
A photocatalyst coating with heat preservation performance mainly comprises the following components in parts by weight: 20 parts of a styrene-acrylic emulsion, 5 parts of methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymer, 3 parts of ethanol, 2 parts of nano titanium dioxide, 0.5 part of nano gold, 3 parts of silica aerogel, 8 parts of polysiloxane-polyurethane block copolymer, 0.1 part of a dispersing agent SN-5040, 20 parts of heavy calcium carbonate, 0.4 part of a defoaming agent CF-16, 20 parts of water and 25 parts of polyvinyl alcohol composite powder.
A preparation method of a photocatalyst coating with heat preservation performance mainly comprises the following preparation steps:
(1) mixing the folded laminar dispersion liquid with absolute ethyl alcohol according to a volume ratio of 1:5 to obtain folded laminar spraying liquid, fixing a polyurethane film on a funnel with the diameter of 6cm, sealing the outer side of the polyurethane film, simultaneously blowing air into the funnel at a constant speed of 8mL/min, spraying the bulged polyurethane film with the folded laminar spraying liquid with the mass of 10 times that of the polyurethane film when the polyurethane film is blown to be 4cm, controlling the spraying speed to be 2mL/min, obtaining a modified polyurethane film blank after the spraying is finished, and drying the modified polyurethane film blank at the temperature of 70 ℃ for 30min to obtain the modified polyurethane film;
(2) the shape polymer solution with the light driving property is prepared by mixing the following components in a volume ratio of 3:1, spraying the mixture on a modified polyurethane film, standing for 36 hours at normal temperature, and removing the film to obtain a polyvinyl alcohol composite film;
(3) hot-pressing the polyvinyl alcohol composite film for 5min at the temperature of 90 ℃ and the pressure of 3MPa to form a modified polyvinyl alcohol composite film, and crushing the modified polyvinyl alcohol composite film to obtain polyvinyl alcohol composite powder;
(4) weighing the following components in parts by weight: 20 parts of styrene-acrylic emulsion, 5 parts of methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymer, 3 parts of ethanol, 2 parts of nano titanium dioxide, 0.5 part of nano gold, 3 parts of silica aerogel, 8 parts of polysiloxane-polyurethane block copolymer, 0.1 part of dispersing agent SN-5040, 20 parts of heavy calcium carbonate, 0.4 part of defoaming agent CF-16, 20 parts of water and 25 parts of polyvinyl alcohol compound powder, water, polymer emulsion, cationic block copolymer, polysiloxane block copolymer, alcohol organic solvent, wetting dispersing agent and polyvinyl alcohol compound powder are added into a stirrer, after uniform stirring, nano titanium dioxide, silica aerogel, heavy calcium carbonate and defoaming agent are added, and after uniform stirring, the coating is obtained; and pouring the coating into a polytetrafluoroethylene mold, and curing for 36 hours at room temperature to obtain the photocatalyst coating with the thickness of 1mm and heat preservation performance.
Optimally, the preparation method of the wrinkled laminar dispersion liquid in the step (1) comprises the steps of mixing titanium dihydride powder, aluminum powder and graphite powder according to a molar ratio of 3:1.1:2, carrying out ball milling to obtain mixed powder, placing the mixed powder in an argon atmosphere, sintering for 2 hours at the temperature of 1400 ℃ to obtain a laminar, mixing hydrochloric acid and fluorine according to a mass ratio of 2:1 in a beaker, adding a laminar with 0.6 times of the mass of the hydrochloric acid into the beaker, stirring and reacting for 2 hours under the water bath condition of 30 ℃, adjusting the pH value of materials in the beaker to be neutral, filtering to obtain a wrinkled laminar, mixing the wrinkled laminar with water according to a mass ratio of 1:5 in the flask, introducing argon gas into the flask at a rate of 8mL/min, carrying out ultrasonic treatment for 1 hour under the ultrasonic action of a probe with the power of 150W to obtain a wrinkled laminar mixed liquid, carrying out centrifugal separation for 6 minutes under the rotating speed of 4000r/min to obtain a wrinkled laminar mixed liquid, taking the supernatant to obtain a wrinkled laminar dispersion; the thickness of the polyurethane film in the step (1) is 0.6 mm.
As an optimization, the preparation method of the shape polymer solution with the light driving property in the step (2) comprises the following steps: adding 100mL of chloroauric acid aqueous solution with the mass fraction of 0.01% into a 250mL round-bottom flask, heating to 98 ℃ in a water bath environment, rapidly stirring, simultaneously adding 3.5mL of sodium citrate aqueous solution with the mass fraction of 1%, continuously heating and stirring for 18min, stopping heating, continuously stirring for 32min, standing to finally obtain wine red nano gold sol, naturally cooling at room temperature to obtain nano gold solution, and storing in an environment at 4 ℃; adding deionized water into polyvinyl alcohol powder according to the mass ratio of 1:14, and swelling for 2 hours in a water bath at the temperature of 92 ℃ to obtain a polyvinyl alcohol solution; mixing the polyvinyl alcohol solution and the nano gold solution according to the volume ratio of 1:1, stirring uniformly, and adding 10% hydrochloric acid to adjust the pH value to 3.8 to obtain a mixed solution; and glutaraldehyde crosslinker with concentration of 50% at 0.008 times the volume of the mixture was added, and after stirring at room temperature for 2 hours, bubbles were removed under vacuum to obtain a shaped polymer solution with light-driving properties.
Example 3
A photocatalyst coating with heat preservation performance mainly comprises the following components in parts by weight: 20 parts of a styrene-acrylic emulsion, 5 parts of methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymer, 3 parts of ethanol, 2 parts of nano titanium dioxide, 0.5 part of nano gold, 3 parts of silica aerogel, 8 parts of polysiloxane-polyurethane block copolymer, 0.1 part of a dispersing agent SN-5040, 20 parts of heavy calcium carbonate, 0.4 part of a defoaming agent CF-16, 20 parts of water and 20 parts of a phase-change material.
A preparation method of a photocatalyst coating with heat preservation performance mainly comprises the following preparation steps:
(1) weighing the following components in parts by weight: 20 parts of styrene-acrylic emulsion, 5 parts of methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymer, 3 parts of ethanol, 2 parts of nano titanium dioxide, 0.5 part of nano gold, 3 parts of silica aerogel, 8 parts of polysiloxane-polyurethane block copolymer, 0.1 part of dispersing agent SN-5040, 20 parts of heavy calcium carbonate, 0.4 part of defoaming agent CF-16, 20 parts of water and 20 parts of phase-change material, wherein water, polymer emulsion, cationic block copolymer, polysiloxane block copolymer, alcohol organic solvent, wetting dispersing agent, phase-change material and polyvinyl alcohol compound powder are added into a stirrer, and after being uniformly stirred, nano titanium dioxide, silica aerogel, heavy calcium carbonate and defoaming agent are added into the stirrer, and the coating is obtained after being uniformly stirred; and pouring the coating into a polytetrafluoroethylene mold, and curing for 36 hours at room temperature to obtain the photocatalyst coating with the thickness of 1mm and heat preservation performance.
As an optimization, the phase-change material in the step (1) is a polystyrene-paraffin phase-change microcapsule, and the preparation method of the polystyrene-paraffin phase-change microcapsule comprises the steps of adding paraffin, polyvinylpyrrolidone, deionized water and absolute ethyl alcohol into a three-neck flask, wherein the paraffin accounts for 15 parts, the polyvinylpyrrolidone accounts for 6 parts, the deionized water accounts for 64 parts, and the absolute ethyl alcohol accounts for 15 parts, heating the materials in the three-neck flask to 80 ℃, stirring and mixing to obtain a paraffin mixture, and adding polyacrylamide accounting for 2% of the volume of the paraffin mixture when the paraffin mixture becomes colorless liquid; after 20 minutes, 9% by volume of styrene and 0.1% by volume of initiator azobisisobutyronitrile were added to the mixture; fixing the reaction temperature at 80 ℃, reacting for 22h to obtain a phase-change material solution, and washing the phase-change material solution with deionized water for 8 times to obtain the phase-change material.
Example 4
A photocatalyst coating with heat preservation performance mainly comprises the following components in parts by weight: 20 parts of a styrene-acrylic emulsion, 5 parts of methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymer, 3 parts of ethanol, 2 parts of nano titanium dioxide, 0.5 part of nano gold, 3 parts of silica aerogel, 8 parts of polysiloxane-polyurethane block copolymer, 0.1 part of a dispersing agent SN-5040, 20 parts of heavy calcium carbonate, 0.4 part of a defoaming agent CF-16, 20 parts of water, 25 parts of polyvinyl alcohol composite powder and 20 parts of a phase change material.
A preparation method of a photocatalyst coating with heat preservation performance mainly comprises the following preparation steps:
(1) mixing the folded laminar dispersion liquid with absolute ethyl alcohol according to a volume ratio of 1:5 to obtain folded laminar spraying liquid, fixing a polyurethane film on a funnel with the diameter of 6cm, sealing the outer side of the polyurethane film, simultaneously blowing air into the funnel at a constant speed of 8mL/min, spraying the bulged polyurethane film with the folded laminar spraying liquid with the mass of 10 times that of the polyurethane film when the polyurethane film is blown to be 4cm, controlling the spraying speed to be 2mL/min, obtaining a modified polyurethane film blank after the spraying is finished, and drying the modified polyurethane film blank at the temperature of 70 ℃ for 30min to obtain the modified polyurethane film;
(2) the shape polymer solution with the light driving property is prepared by mixing the following components in a volume ratio of 3:1, spraying the mixture on a modified polyurethane film, standing for 36 hours at normal temperature, uncovering the film to obtain a polyvinyl alcohol composite film, and crushing the polyvinyl alcohol composite film to obtain polyvinyl alcohol composite powder;
(3) weighing the following components in parts by weight: 20 parts of styrene-acrylic emulsion, 5 parts of methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymer, 3 parts of ethanol, 2 parts of nano titanium dioxide, 0.5 part of nano gold, 3 parts of silica aerogel, 8 parts of polysiloxane-polyurethane block copolymer, 0.1 part of dispersing agent SN-5040, 20 parts of heavy calcium carbonate, 0.4 part of defoaming agent CF-16, 20 parts of water, 25 parts of polyvinyl alcohol compound powder and 20 parts of phase change material, wherein water, polymer emulsion, cationic block copolymer, polysiloxane block copolymer, alcohol organic solvent, wetting dispersing agent, phase change material and polyvinyl alcohol compound powder are added into a stirrer, nano titanium dioxide, silica aerogel, heavy calcium carbonate and defoaming agent are added after uniform stirring, and the coating is obtained after uniform stirring; and pouring the coating into a polytetrafluoroethylene mold, and curing for 36 hours at room temperature to obtain the photocatalyst coating with the thickness of 1mm and heat preservation performance.
Optimally, the preparation method of the wrinkled laminar dispersion liquid in the step (1) comprises the steps of mixing titanium dihydride powder, aluminum powder and graphite powder according to a molar ratio of 3:1.1:2, carrying out ball milling to obtain mixed powder, placing the mixed powder in an argon atmosphere, sintering for 2 hours at the temperature of 1400 ℃ to obtain a laminar, mixing hydrochloric acid and fluorine according to a mass ratio of 2:1 in a beaker, adding a laminar with 0.6 times of the mass of the hydrochloric acid into the beaker, stirring and reacting for 2 hours under the water bath condition of 30 ℃, adjusting the pH value of materials in the beaker to be neutral, filtering to obtain a wrinkled laminar, mixing the wrinkled laminar with water according to a mass ratio of 1:5 in the flask, introducing argon gas into the flask at a rate of 8mL/min, carrying out ultrasonic treatment for 1 hour under the ultrasonic action of a probe with the power of 150W to obtain a wrinkled laminar mixed liquid, carrying out centrifugal separation for 6 minutes under the rotating speed of 4000r/min to obtain a wrinkled laminar mixed liquid, taking the supernatant to obtain a wrinkled laminar dispersion; the thickness of the polyurethane film in the step (1) is 0.6 mm.
As an optimization, the preparation method of the shape polymer solution with the light driving property in the step (2) comprises the following steps: adding 100mL of chloroauric acid aqueous solution with the mass fraction of 0.01% into a 250mL round-bottom flask, heating to 98 ℃ in a water bath environment, rapidly stirring, simultaneously adding 3.5mL of sodium citrate aqueous solution with the mass fraction of 1%, continuously heating and stirring for 18min, stopping heating, continuously stirring for 32min, standing to finally obtain wine red nano gold sol, naturally cooling at room temperature to obtain nano gold solution, and storing in an environment at 4 ℃; adding deionized water into polyvinyl alcohol powder according to the mass ratio of 1:14, and swelling for 2 hours in a water bath at the temperature of 92 ℃ to obtain a polyvinyl alcohol solution; mixing the polyvinyl alcohol solution and the nano gold solution according to the volume ratio of 1:1, stirring uniformly, and adding 10% hydrochloric acid to adjust the pH value to 3.8 to obtain a mixed solution; and glutaraldehyde crosslinker with concentration of 50% at 0.008 times the volume of the mixture was added, and after stirring at room temperature for 2 hours, bubbles were removed under vacuum to obtain a shaped polymer solution with light-driving properties.
As an optimization, the phase-change material in the step (3) is a polystyrene-paraffin phase-change microcapsule, and the preparation method of the polystyrene-paraffin phase-change microcapsule comprises the steps of adding paraffin, polyvinylpyrrolidone, deionized water and absolute ethyl alcohol into a three-neck flask, wherein the paraffin accounts for 15 parts, the polyvinylpyrrolidone accounts for 6 parts, the deionized water accounts for 64 parts, and the absolute ethyl alcohol accounts for 15 parts, heating the materials in the three-neck flask to 80 ℃, stirring and mixing to obtain a paraffin mixture, and adding polyacrylamide accounting for 2% of the volume of the paraffin mixture when the paraffin mixture becomes colorless liquid; after 20 minutes, 9% by volume of styrene and 0.1% by volume of initiator azobisisobutyronitrile were added to the mixture; fixing the reaction temperature at 80 ℃, reacting for 22h to obtain a phase-change material solution, and washing the phase-change material solution with deionized water for 8 times to obtain the phase-change material.
Comparative example
A photocatalyst coating with heat preservation performance mainly comprises the following components in parts by weight: 20 parts of a styrene-acrylic emulsion, 5 parts of methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymer, 3 parts of ethanol, 2 parts of nano titanium dioxide, 0.5 part of nano gold, 3 parts of silica aerogel, 8 parts of polysiloxane-polyurethane block copolymer, 0.1 part of a dispersing agent SN-5040, 20 parts of heavy calcium carbonate, 0.4 part of a defoaming agent CF-16 and 20 parts of water.
A preparation method of a photocatalyst coating with heat preservation performance mainly comprises the following preparation steps:
(1) weighing the following components in parts by weight: 20 parts of styrene-acrylic emulsion, 5 parts of methyl methacrylate- [2- (methacryloyloxy) ethyl ] trimethyl ammonium chloride block polymer, 3 parts of ethanol, 2 parts of nano titanium dioxide, 0.5 part of nano gold, 3 parts of silica aerogel, 8 parts of polysiloxane-polyurethane block copolymer, 0.1 part of dispersing agent SN-5040, 20 parts of heavy calcium carbonate, 0.4 part of defoaming agent CF-16 and 20 parts of water are added into a stirrer, water, polymer emulsion, cationic block copolymer, polysiloxane block copolymer, alcohol organic solvent, wetting dispersing agent, phase change material and polyvinyl alcohol compound powder are added into the stirrer, the nano titanium dioxide, the silica aerogel, the heavy calcium carbonate and the defoaming agent are added after uniform stirring, and the coating is obtained after uniform stirring; and pouring the coating into a polytetrafluoroethylene mold, and curing for 36 hours at room temperature to obtain the photocatalyst coating with the thickness of 1mm and heat preservation performance.
Examples of effects
Table 1 below shows the results of performance analysis of the photocatalyst coatings having heat retaining properties using examples 1 to 4 of the present invention and a comparative example.
TABLE 1
From the comparison of the experimental data of example 1 and the comparative example in table 1, it can be found that when polyvinyl alcohol composite powder and phase change material prepared after hot pressing are added in the preparation of photocatalyst coating with heat preservation performance, the impact resistance and heat preservation performance of the product can be effectively improved; from the experimental data of example 1 and example 2, the heat insulating property of the product is reduced without adding the phase change material when preparing the photocatalyst coating layer having heat insulating property, and the impact resistance is reduced because the layered compound formed by the polyvinyl alcohol composite powder forms pore size after being irradiated with light, and the pore size inside the coating layer is increased, and from the experimental data of example 1 and example 3, it is found that when preparing the photocatalyst coating layer having heat insulating property, the coating layer does not have the layered structure generated by the polyvinyl alcohol composite without adding the polyvinyl alcohol composite powder, which results in the decrease of the pore size of the coating layer, and the binding force of the phase change microcapsules is weakened, thereby reducing the impact resistance and heat insulating property of the product, and from the experimental data of example 1 and example 4, it is found that when preparing the photocatalyst coating layer having heat insulating property, the polyvinyl alcohol composite powder and the phase change material which are not subjected to heat pressing are added, the binding force of the polyvinyl alcohol compound powder and the phase-change material is reduced in the process of not extruding, and the impact resistance and the heat conductivity coefficient are also reduced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
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