CN116694169A - Temperature-sensitive color-changing water-based paint and preparation method thereof - Google Patents
Temperature-sensitive color-changing water-based paint and preparation method thereof Download PDFInfo
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- CN116694169A CN116694169A CN202310686463.7A CN202310686463A CN116694169A CN 116694169 A CN116694169 A CN 116694169A CN 202310686463 A CN202310686463 A CN 202310686463A CN 116694169 A CN116694169 A CN 116694169A
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- color
- changing
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 239000003973 paint Substances 0.000 title claims abstract description 63
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 51
- 238000002156 mixing Methods 0.000 claims abstract description 31
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 26
- 239000011521 glass Substances 0.000 claims abstract description 22
- 229910026551 ZrC Inorganic materials 0.000 claims abstract description 19
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011324 bead Substances 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000839 emulsion Substances 0.000 claims abstract description 17
- 239000010439 graphite Substances 0.000 claims abstract description 17
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002270 dispersing agent Substances 0.000 claims abstract description 11
- 239000000080 wetting agent Substances 0.000 claims abstract description 11
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 10
- 239000004917 carbon fiber Substances 0.000 claims abstract description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 9
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims description 57
- 238000000576 coating method Methods 0.000 claims description 57
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 42
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 claims description 34
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 31
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 28
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 27
- 239000010451 perlite Substances 0.000 claims description 23
- 235000019362 perlite Nutrition 0.000 claims description 23
- 239000011787 zinc oxide Substances 0.000 claims description 21
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 14
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 11
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims description 11
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims description 11
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 11
- 229920000548 poly(silane) polymer Polymers 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000011684 sodium molybdate Substances 0.000 claims description 5
- 235000015393 sodium molybdate Nutrition 0.000 claims description 5
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 3
- 125000000914 phenoxymethylpenicillanyl group Chemical group CC1(S[C@H]2N([C@H]1C(=O)*)C([C@H]2NC(COC2=CC=CC=C2)=O)=O)C 0.000 claims description 3
- IPCXNCATNBAPKW-UHFFFAOYSA-N zinc;hydrate Chemical compound O.[Zn] IPCXNCATNBAPKW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003623 enhancer Substances 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- 238000002845 discoloration Methods 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- GFHNAMRJFCEERV-UHFFFAOYSA-L cobalt chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Co+2] GFHNAMRJFCEERV-UHFFFAOYSA-L 0.000 description 4
- ARPLKSKOWFTTTQ-UHFFFAOYSA-L cobalt(2+);dichloride;dihydrate Chemical compound O.O.Cl[Co]Cl ARPLKSKOWFTTTQ-UHFFFAOYSA-L 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 229940050906 magnesium chloride hexahydrate Drugs 0.000 description 4
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000000643 oven drying Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- GNSFRPWPOGYVLO-UHFFFAOYSA-N 3-hydroxypropyl 2-methylprop-2-enoate Chemical group CC(=C)C(=O)OCCCO GNSFRPWPOGYVLO-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 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 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229920013822 aminosilicone Polymers 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229920000547 conjugated polymer Polymers 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- SHFGJEQAOUMGJM-UHFFFAOYSA-N dialuminum dipotassium disodium dioxosilane iron(3+) oxocalcium oxomagnesium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Na+].[Na+].[Al+3].[Al+3].[K+].[K+].[Fe+3].[Fe+3].O=[Mg].O=[Ca].O=[Si]=O SHFGJEQAOUMGJM-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- -1 polyoxyethylene Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical group CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000000007 visual effect Effects 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
- 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
- C09D5/004—Reflecting paints; Signal paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/26—Thermosensitive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/29—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for multicolour effects
-
- 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
- C09D5/32—Radiation-absorbing paints
-
- 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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
Abstract
The application relates to the technical field of water-based paint preparation, and particularly discloses a temperature-sensitive color-changing water-based paint and a preparation method thereof. The application relates to a temperature-sensitive color-changing water-based paint which is mainly prepared from the following raw materials: an acrylic emulsion; a fluorocarbon resin; a defoaming agent; a wetting agent; a leveling agent; a dispersing agent; water; a carbon fiber; a film forming aid; a color changing agent; a color change enhancer; the color-changing reinforcing agent consists of expanded glass beads, expandable graphite, zirconium carbide and aluminum oxide; the preparation method comprises the following steps: mixing a color changing agent, a color changing reinforcing agent, 1/4-1/3 of acrylic emulsion, carbon fiber and 1/5-1/4 of water to obtain a mixture; uniformly mixing fluorocarbon resin, a defoaming agent, a wetting agent, a leveling agent, a dispersing agent, a film forming auxiliary agent, a mixture, residual acrylic emulsion and residual water. The temperature-sensitive color-changing water-based paint changes color along with the change of temperature, and has higher color-changing acuity.
Description
Technical Field
The application relates to the technical field of water-based paint preparation, in particular to a temperature-sensitive color-changing water-based paint and a preparation method thereof.
Background
China is the largest toy production and export country in the world, producing more than 70% of the world, while Guangdong is the largest toy production and export base in China, accounting for about 70% of the world. The Guangdong toy industry is guided by outlets with a proportion of outlets as high as eight ingredients. Cantonese toy export for 173.4 million dollars in 2014 to 202 countries and regions.
The Guangdong toy manufacturing industry has the following characteristics: the upstream, middle and downstream industrial chains are complete, the industrial supporting facilities are perfect, the technological content is high, and the added value is large. The product types are mainly plastic and electronic toys, and account for about 70 percent of the product types, so that the plastic paint has quite wide application range and large use amount in toy products.
In order to improve the interestingness of toys, the surfaces of the toys are coated with color-changing paint, the color-changing paint contains color-changing materials, the development of the color-changing materials not only widens the color-changing temperature range, but also enriches the color change, the color of the color-changing materials changes when the color-changing materials feel the temperature change of the external environment, the color change is accompanied with the change of the physical structure or the chemical structure of the color-changing materials, and the change of the material structure leads to the change of the spectral properties, so that the color change of macroscopic colors is shown.
At present, the color-changing material is unstable when used in the paint, and the color-changing time is longer, so that the use experience of people is affected.
Therefore, how to prepare a coating with short color-changing time is a technical problem which needs to be solved at present.
Disclosure of Invention
In order to prepare a paint with short color-changing time, the application provides a temperature-sensitive color-changing water paint and a preparation method thereof.
In a first aspect, the application provides a temperature-sensitive color-changing water-based paint, which adopts the following technical scheme:
the temperature-sensitive color-changing water-based paint is mainly prepared from the following raw materials in parts by weight:
30-35 parts of acrylic emulsion;
3-4 parts of fluorocarbon resin;
0.5-0.7 part of defoaming agent;
0.5-1 part of wetting agent;
0.2-0.4 part of leveling agent;
1-1.5 parts of dispersing agent;
15-18 parts of water;
3-4 parts of carbon fiber;
0.5-0.8 part of film forming auxiliary agent;
10-20 parts of a color changing agent; the color-changing agent is at least two of cobalt chloride/aluminum oxide, cholesteric liquid crystal and polysilane;
5-10 parts of a color-changing reinforcing agent; the color-changing reinforcing agent consists of (8-10)/(3-5)/(4-6) by mass ratio of (8-5)/(3-5) by mass ratio of (expandable glass beads, expandable graphite, zirconium carbide and aluminum oxide.
Preferably, the preparation method of the cobalt chloride/aluminum oxide comprises the following steps: mixing cobalt chloride dihydrate, cobalt chloride hexahydrate and magnesium chloride hexahydrate, dissolving in water, adding ethanol, stirring, adding aluminum oxide, oven drying, and grinding. Wherein the mass ratio of cobalt chloride dihydrate to cobalt chloride hexahydrate to magnesium chloride hexahydrate to aluminum oxide is 1:1:2:8. The drying temperature was 100 ℃.
Preferably, the coating thickness is 50-60 μm.
By adopting the technical scheme, the color changing agent and the color changing reinforcing agent are added into the paint, and the two components of the color changing agent and the color changing reinforcing agent are matched with other components in the paint, so that the paint is coated on the object to be coated, the adhesive force between the paint and the object to be coated is conveniently enhanced, meanwhile, the color changing agent and the color changing reinforcing agent are uniformly distributed on the surface of the object to be coated, when the object to be coated is irradiated by sunlight or directly heated, the coating temperature of the object to be coated is changed, the color changing agent causes the object to be coated to present various colors along with the temperature change, the color changing sensitivity of the color changing agent is conveniently enhanced, and the color changing stability of the object to be coated is conveniently improved;
wherein cobalt chloride/aluminum oxide, cholesteric liquid crystal and polysilane in the color-changing agent change color along with the change of temperature, and the color-changing temperatures are different, so that the objects to be coated are different in color, and the application range of the coating is further increased;
the zirconium carbide in the color-changing reinforcing agent emits heat under the action of solar heat energy and reflects far infrared rays with longer wavelength; the zirconium carbide emits heat, the heat is transmitted to the expanded glass beads through the expandable graphite, the heat conductivity coefficient of the expanded glass beads is small, the heat insulation performance is good, the heat transmitted through the expandable graphite is convenient to gather, the temperature of the coating is further improved, the color change of the color changing agent is facilitated to be promoted, and the color change stability of an object to be coated is improved;
the alumina in the color-changing reinforcing agent has the function of far infrared absorption, can be uniformly distributed in the coating, is convenient for absorbing infrared rays, has the effect of heat storage and heat preservation, and can penetrate into the internal structure of carbon fiber molecules, so that the heat preservation effect of the coating is further improved, a coating coated with the coating is heated, the temperature of the coating is conveniently and rapidly increased, the coating is rapidly changed, and the color-changing acuity of the color change of the coating is improved;
the wetting agent is convenient to be added to act together with the defoaming agent, so that the conditions of pinholes, fish eyes, volcanic pits and the like of a coating film are reduced, the surface defects of the coating after spraying are reduced, and meanwhile, the surface glossiness and the adhesive capacity of the coating during coating are improved;
the dispersing agent is added, so that the distribution condition of the color changing agent and the color changing reinforcing agent in the paint is improved, the color changing agent and the color changing reinforcing agent are uniformly distributed in the paint, and the layering condition of the paint is reduced.
Preferably, the mass ratio of the color-changing agent to the color-changing reinforcing agent is (15-18) to (6-8).
By adopting the technical scheme, the mass ratio of the two components of the color changing agent and the color changing reinforcing agent is adjusted, so that the mass ratio of the two components is optimal, and when the mass ratio of the color changing agent to the color changing reinforcing agent is in the range of the application, the color changing reinforcing agent is convenient for accelerating the color changing of the color changing agent, shortening the color changing time of the paint, enhancing the color changing acuity of the paint, and the color changing agent, the color changing reinforcing agent and other components of the paint are mutually matched to cooperate to further improve the color changing stability of the paint.
Preferably, the color-changing agent consists of cobalt chloride/aluminum oxide, cholesteric liquid crystal and polysilane according to the mass ratio of (5-6) (3-4) (1-2).
By adopting the technical scheme, when the temperature is higher than a certain temperature, the color of the coating film added with the color-changing agent is changed, and when the temperature is lower than the certain temperature, the color of the coating film is restored to the original color; the color-changing agent is prepared by compounding three components of cobalt chloride/aluminum oxide, cholesteric liquid crystal and polysilane, the proportion of the three components is adjusted to ensure that the proportion of the three components is optimal, wherein,
cobalt chloride/aluminum oxide is used as an inorganic thermosensitive material, and changes color along with the change of crystal water when the temperature of the cobalt chloride/aluminum oxide changes, and as the cobalt chloride/aluminum oxide contains the crystal water, the cobalt chloride/aluminum oxide loses the crystal water to change color when being heated, and absorbs moisture from the air to form the crystal water to recover the primary color after cooling;
polysilane belongs to conjugated polymers, when the temperature is increased, the main chain conformation is changed from a trans-plane structure to a spiral structure, the intra-molecular conjugation length is shortened, the electron delocalization characteristic is changed, and the color of the polymer is changed, so that the object to be coated is changed; the cholesteric liquid crystal has better thermochromic performance, can change from colorless to other colors such as red, yellow, green and the like along with temperature change, has a spiral structure, has unique optical properties and has extremely strong optical rotation for polarized light; when a beam of light is irradiated onto it, polarized light of certain wavelengths is selectively absorbed and reflected, and the surface is reflected and transmitted through the liquid crystal layer, and the color changes along with the extension or shortening of the molecular screw structure. The helix is quite sensitive to temperature, as temperature can cause the helix to stretch, selectively reflect light, and change the wavelength of the reflected light.
Preferably, the cholesteric liquid crystal is modified cholesteric liquid crystal, and the preparation method of the modified cholesteric liquid crystal comprises the following steps: mixing PVA, zinc oxide and water to obtain PVA water solution; adding cholesteric liquid crystal into PVA water solution, centrifuging and drying to obtain the final product.
By adopting the technical scheme, the PVA has film forming property, so that cholesteric liquid crystal in the film is not influenced by external environment, the PVA film can be freely added into the water-based paint, and meanwhile, the performance of the functional coating film is improved, the service life of the functional coating film is prolonged, and the functional coating film has good appearance of the coating film; the compatibility of the cholesteric liquid crystal and the PVA aqueous solution is good, and the PVA film has a protective effect on the cholesteric liquid crystal and reduces the influence of other impurities on the cholesteric liquid crystal.
Preferably, the alumina is modified alumina, and the preparation method of the modified alumina comprises the following steps: mixing aluminum oxide and zinc oxide to obtain a first mixture; mixing the mixture I, the expanded perlite and the binder to obtain a mixture II, mixing the mixture II with the nano titanium oxide, and drying to obtain the nano titanium oxide.
By adopting the technical scheme, the aluminum oxide is matched with the zinc oxide, so that the heat conductivity of the aluminum oxide is further enhanced, the expanded perlite is introduced to endow the modified aluminum oxide with certain heat storage capacity, the heating rate of a coating film is accelerated conveniently, and meanwhile, the color-changing acuity of the coating film is improved, and the color-changing stability of an object to be coated is further improved.
Preferably, the grain size ratio of the expanded perlite to the nano titanium oxide to the alumina to the zinc oxide is (5-8): (0.5-1): (2-3): (2-3).
Preferably, the mass ratio of the expanded perlite to the nano titanium oxide to the alumina to the zinc oxide is (1-2), 4-5, 8-9 and 2-3.
By adopting the technical scheme, the particle sizes of the four components of the expanded perlite, the nano titanium oxide, the aluminum oxide and the zinc oxide are adjusted, so that the particle sizes of the four components are optimal, in the particle size ratio range of the application, the aluminum oxide and the zinc oxide are attached to the surface of the expanded perlite, part of the nano titanium oxide is attached to the surface of the aluminum oxide and the surface of the zinc oxide, part of the nano titanium oxide is filled on the surface of the aluminum oxide and the surface of the zinc oxide, the aluminum oxide and the zinc oxide transfer heat into the expanded perlite, the expanded perlite stores heat, the temperature of a coating film is improved, the color changing sensitivity of a color changing agent is further improved, and the color changing stability of the coating film is improved.
Preferably, the expanded perlite is roughened.
Through adopting above-mentioned technical scheme, the surface becomes coarse after the expanded perlite roughening treatment, and the specific area increases, is convenient for strengthen the area of contact between expanded perlite and aluminium oxide, zinc oxide, the nanometer titanium dioxide, increases aluminium oxide, zinc oxide, nanometer titanium dioxide's adhesive strength on the expanded perlite surface, is convenient for improve modified aluminium oxide's stability for aluminium oxide and better effect of zirconium carbide, and then improve the synergism to the color changing agent.
Preferably, the nano titanium oxide is modified nano titanium oxide, and the preparation method of the modified nano titanium oxide comprises the following steps: s1, preparation of molybdenum oxide sol: mixing hydrochloric acid aqueous solution with sodium molybdate, and aging at pH <1 to obtain molybdenum oxide sol; s2, preparation of modified nano titanium dioxide: mixing the molybdenum oxide sol prepared in the step S1 with the nano titanium dioxide sol, collecting the precipitate generated in the mixing process, and washing and drying the precipitate to obtain the nano titanium dioxide sol.
By adopting the technical scheme, the nano titanium oxide has better thermal conductivity, so that heat can be uniformly distributed on the surface of a coating, the modified nano titanium oxide forms Mo-O-Ti bonds on the interface of titanium oxide and molybdenum oxide, the Mo-O-Ti bonds have charge transfer characteristics, electrons are excited from a 02p track of the dioxide under the irradiation of visible light and transferred to a Mo3d track of the oxide through the Mo-O-Ti bonds, and the Mo-O-Ti bonds push charges to be transferred from TiO 2 Transfer to molybdenum oxide, such that Mo 6+ Is reduced to Mo 5+ Thereby achieving visible light-induced photochromism.
Preferably, the particle size ratio of the expanded glass beads to the expandable graphite to the zirconium carbide to the aluminum oxide is (3-4), the particle size ratio of the expanded glass beads to the expandable graphite to the zirconium carbide to the aluminum oxide is (1-2), the particle size ratio of the expanded glass beads to the aluminum oxide to the expandable graphite to the zirconium carbide to the aluminum oxide is (5-6), and the particle size ratio of the expanded glass beads to the zirconium carbide to the aluminum oxide is (2-3).
By adopting the technical scheme, the particle sizes of the four components of the expanded glass bead, the expandable graphite, the zirconium carbide and the aluminum oxide are adjusted, so that the particle size ratio of the four components is optimal, the color-changing reinforcing agent is better matched with the color-changing agent, and the color-changing acuity of the coating is improved.
In a second aspect, the application provides a preparation method of a temperature-sensitive color-changing water-based paint, which adopts the following technical scheme: a preparation method of a temperature-sensitive color-changing water-based paint comprises the following steps:
(1) Preparing a mixture: mixing a color changing agent, a color changing reinforcing agent, 1/4-1/3 of acrylic emulsion, carbon fiber and 1/5-1/4 of water to obtain a mixture;
(2) And (3) preparing a coating: uniformly mixing fluorocarbon resin, a defoaming agent, a wetting agent, a leveling agent, a dispersing agent, a film forming auxiliary agent, the mixture of the step (1), the rest of acrylic emulsion and the rest of water.
By adopting the technical scheme, the preparation method of the water-based paint is simple, and the prepared water-based paint is safer and changes color along with temperature change.
In summary, the application has the following beneficial effects:
1. the temperature-sensitive color-changing water-based paint is added with the color-changing agent and the color-changing reinforcing agent, the color-changing agent is convenient for changing color along with the temperature, so that the coating presents different colors, the interestingness is increased, the color-changing reinforcing agent is convenient for enhancing the heat transmission speed in the paint, the color-changing time of a coating film is shortened, and meanwhile, the color-changing acuity of the coating film is increased.
2. In the temperature-sensitive color-changing water-based paint, the color-changing reinforcing agent is compounded by four components of the expanded glass beads, the expandable graphite, the zirconium carbide and the aluminum oxide, wherein the zirconium carbide emits heat under the action of solar heat energy and reflects far infrared rays with longer wavelength, the aluminum oxide can absorb the far infrared rays and convert the light energy into heat energy, and meanwhile, the heat is transmitted by the expandable graphite and accumulated on the expanded glass beads, so that the temperature of a coating film is increased, and the color-changing time of the coating film is shortened.
Detailed Description
The present application will be described in further detail with reference to examples.
Examples
Example 1: the temperature-sensitive color-changing water-based paint comprises the following raw materials in parts by weight:
30kg of acrylic emulsion; the acrylic emulsion consists of styrene-acrylic emulsion and pure acrylic emulsion according to the mass ratio of 1:1;
3kg of fluorocarbon resin;
0.5kg of defoamer; the defoamer is tributyl phosphate;
0.5kg of wetting agent; the wetting agent is alkylphenol polyoxyethylene;
0.2kg of leveling agent; the leveling agent is amino silicone oil;
1kg of a dispersing agent; the dispersing agent is hydroxypropyl methacrylate;
15kg of water;
3kg of carbon fiber;
0.5kg of film forming auxiliary agent; the film forming auxiliary agent is hydroxyethyl cellulose sodium;
10kg of a color-changing agent; the color-changing agent consists of cobalt chloride/aluminum oxide and cholesteric liquid crystal according to the mass ratio of 1:1; the preparation method of the cobalt chloride/aluminum oxide comprises the following steps: mixing cobalt chloride dihydrate, cobalt chloride hexahydrate and magnesium chloride hexahydrate, dissolving in water, adding ethanol, stirring, adding aluminum oxide, oven drying, and grinding to obtain the final product; wherein the mass ratio of cobalt chloride dihydrate to cobalt chloride hexahydrate to magnesium chloride hexahydrate to aluminum oxide is 1:1:2:8; the drying temperature is 100 ℃; cholesteric liquid crystals are commercially available;
5kg of a discoloration enhancer; the color-changing reinforcing agent consists of expanded glass beads, expandable graphite, zirconium carbide and aluminum oxide according to the mass ratio of 8:3:3:4; the particle size ratio of the expanded glass beads to the expandable graphite to the zirconium carbide to the aluminum oxide is 3:1:5:2.
The preparation method of the temperature-sensitive color-changing water-based paint comprises the following steps:
(1) Preparing a mixture: mixing a color changing agent, a color changing reinforcing agent, 1/4 of acrylic emulsion, carbon fiber and 1/5 of water to obtain a mixture;
(2) And (3) preparing a coating: uniformly mixing fluorocarbon resin, a defoaming agent, a wetting agent, a leveling agent, a dispersing agent, a film forming auxiliary agent, the mixture of the step (1), the rest of acrylic emulsion and the rest of water.
TABLE 1 raw material composition ratio of temperature-sensitive color-changing Water-based paint of examples 1-4
| Raw materials | Example 1 | Example 2 | Example 3 | Example 4 |
| Acrylic emulsion | 30 | 35 | 35 | 35 |
| Fluorocarbon resin | 3 | 4 | 4 | 4 |
| Defoaming agent | 0.5 | 0.7 | 0.7 | 0.7 |
| Wetting agent | 0.5 | 1 | 1 | 1 |
| Leveling agent | 0.2 | 0.4 | 0.4 | 0.4 |
| Dispersing agent | 1 | 1.5 | 1.5 | 1.5 |
| Water and its preparation method | 15 | 18 | 18 | 18 |
| Carbon fiber | 3 | 4 | 4 | 4 |
| Film forming aid | 0.5 | 0.8 | 0.8 | 0.8 |
| Color-changing agent | 10 | 20 | 15 | 18 |
| Color change enhancer | 5 | 10 | 6 | 8 |
Example 2: the composition of the raw materials of the temperature-sensitive color-changing water-based paint is shown in table 1, and the difference from example 1 is that: the raw material components are different in proportion. The color-changing reinforcing agent consists of expanded glass beads, expandable graphite, zirconium carbide and aluminum oxide according to the mass ratio of 10:5:5:6; the particle size ratio of the expanded glass beads to the expandable graphite to the zirconium carbide to the aluminum oxide is 4:2:6:3.
Examples 3-4: the composition of the raw materials of the temperature-sensitive color-changing water-based paint is shown in table 1, and the difference from example 2 is that: the raw material components are different in proportion.
Example 5: the difference between the temperature-sensitive color-changing water-based paint and the example 4 is that: the color-changing agent consists of cobalt chloride/aluminum oxide, cholesteric liquid crystal and polysilane according to the mass ratio of 5:3:1.
Example 6: the difference between the temperature-sensitive color-changing water-based paint and the example 4 is that: the color-changing agent consists of cobalt chloride/aluminum oxide, cholesteric liquid crystal and polysilane according to the mass ratio of 6:4:2.
Example 7: the difference between the temperature-sensitive color-changing water-based paint and the example 6 is that: the preparation method of the cholesteric liquid crystal is characterized in that the cholesteric liquid crystal is modified cholesteric liquid crystal, and the preparation method comprises the following steps: mixing PVA, zinc oxide and water according to a mass ratio of 10:2:20 to obtain a PVA aqueous solution; adding cholesteric liquid crystal into PVA water solution, centrifuging and drying to obtain the final product. Wherein the mass ratio of the cholesteric liquid crystal to the PVA aqueous solution is 2:5.
Example 8: the difference between the temperature-sensitive color-changing water-based paint and the embodiment 7 is that: the alumina is modified alumina, and the preparation method of the modified alumina comprises the following steps: mixing aluminum oxide and zinc oxide to obtain a first mixture; mixing the mixture I, the expanded perlite and the binder to obtain a mixture II, mixing the mixture II with the nano titanium oxide, and drying to obtain the nano titanium oxide. Wherein the mass ratio of the expanded perlite to the nano titanium oxide to the zinc oxide to the aluminum oxide is 1:4:8:2; the particle size ratio of the expanded perlite to the nano titanium oxide to the zinc oxide to the aluminum oxide is 1:1:1:1, and the mass ratio of the expanded perlite to the binder is 1:2. The expanded perlite is roughened, and the roughening treatment mode comprises the following steps: placing the expanded perlite in an acid solution for corrosion treatment, wherein the corrosion time is 13s, the acid solution is sulfuric acid solution, and the molar concentration of substances in the sulfuric acid solution is 1mol/L. The binder is pure acrylic emulsion.
Example 9: the difference between the temperature-sensitive color-changing water-based paint and the example 8 is that: the grain size ratio of the expanded perlite to the nano titanium oxide to the alumina to the zinc oxide is 5:0.5:2:2.
Example 10: the difference between the temperature-sensitive color-changing water-based paint and the embodiment 9 is that: the nano titanium oxide is modified nano titanium oxide, and the preparation method of the modified nano titanium oxide comprises the following steps: s1, preparation of molybdenum oxide sol: adding hydrochloric acid aqueous solution into sodium molybdate aqueous solution, mixing at 25 ℃ until the pH is less than 1, and aging to obtain molybdenum oxide sol; s2, preparation of modified nano titanium dioxide: mixing the molybdenum oxide sol prepared in the step S1 with the nano titanium dioxide sol according to the mass ratio of 2:1, collecting the precipitate generated in the mixing process, and washing and drying the precipitate to obtain the nano titanium dioxide sol. Wherein, the molar concentration of the hydrochloric acid aqueous solution is 3mol/L, and the mass ratio of water to sodium molybdate in the sodium molybdate aqueous solution is 100:5; washing with water for 5 times.
Comparative example
Comparative example 1: the difference from example 1 is that: no discoloration enhancer was added.
Comparative example 2: the difference from example 1 is that: the color-changing reinforcing agent consists of expanded glass beads, expandable graphite, zirconium carbide and aluminum oxide according to the mass ratio of 1:1:1:1.
Detection method
Adhesive force performance test: the temperature-sensitive color-changing aqueous paints of examples 1 to 10 and comparative examples 1 to 2 were tested for adhesion according to GB/T1720-1979 paint film adhesion assay, and the adhesion test results are shown in Table 2.
Color change time test: before the color change time is measured, the incubator is adjusted to a certain temperature, the temperature-sensitive color-changing water-based paint of examples 1-10 and comparative examples 1-2 is uniformly coated on a glass slide, and the glass slide is placed into the incubator after the glass slide is thoroughly cooled. The measurement of the color change time takes the surface or local color change of the color change material as an observation starting point and takes the total color change as an end point. The measurement was repeated 3 times and an average was taken to minimize experimental errors. The experiment needs to be performed by the same observer in order to avoid errors caused by visual differences between observers. The color change time test results are shown in Table 2.
Color change acuity detection: uniformly coating the temperature-sensitive color-changing water-based paint of the examples 1-10 and the comparative examples 1-2 on a glass slide, testing the color difference values of samples before and after color change by using an SF-600 spectrophotometry, and measuring the color change acuity by using an Sa value; the calculation formula of Sa is as follows:
wherein t is the time from the onset of discoloration to no longer discoloration; Δe is the total color difference of the samples before and after color change.
TABLE 2 Performance test of temperature-sensitive color-changing aqueous coating materials of examples 1 to 10 and comparative examples 1 to 2
| Sequence number | Adhesion force | Color change time s | Color change acuity |
| Example 1 | Level 0 | 85 | 0.241 |
| Example 2 | Level 0 | 83 | 0.247 |
| Example 3 | Level 0 | 80 | 0.256 |
| Example 4 | Level 0 | 79 | 0.259 |
| Example 5 | Level 0 | 77 | 0.267 |
| Example 6 | Level 0 | 75 | 0.272 |
| Example 7 | Level 0 | 71 | 0.288 |
| Example 8 | Level 0 | 66 | 0.301 |
| Example 9 | Level 0 | 62 | 0.315 |
| Example 10 | Level 0 | 60 | 0.323 |
| Comparative example 1 | Level 0 | 109 | 0.189 |
| Comparative example 2 | Level 0 | 97 | 0.204 |
As can be seen by combining example 1 and comparative examples 1-2, and combining the data in table 2, the temperature-sensitive color-changing aqueous coating of example 1 has a shorter color-changing time and higher color-changing acuity, and the inventors believe that the performance is better than that of comparative examples 1-2: the color-changing agent and the color-changing reinforcing agent are matched in a synergistic way and interact with other components of the paint, so that the color-changing stability of the color-changing paint is improved.
By combining examples 1-4 and combining the data in Table 2, the application adopts self-made temperature-sensitive color-changing water-based paint, the components of the temperature-sensitive color-changing water-based paint are mutually matched and synergistically act, and the prepared temperature-sensitive color-changing water-based paint has stable performance, color-changing performance and higher color-changing acuity.
As can be seen from the data in table 2 in combination with examples 4-6, the temperature-sensitive color-changing aqueous coating materials of examples 5-6 have shorter color-changing time and higher color-changing acuity than example 4, and examples 5-6 differ from example 4 in that: the color-changing agent in examples 5-6 is compounded by three components of cobalt chloride/aluminum oxide, cholesteric liquid crystal and polysilane, and the inventor considers that: when the color-changing agent is compounded by three components of cobalt chloride/aluminum oxide, cholesteric liquid crystal and polysilane, the three components are matched in a synergistic way to interact with other components in the paint, so that the color-changing sensitivity of the temperature-sensitive color-changing water-based paint is further improved.
As can be seen in combination with examples 6-7 and with the data in table 2, the discoloration time of the temperature-sensitive, color-changing aqueous coating of example 7 is shorter than the discoloration time of the temperature-sensitive, color-changing aqueous coating of example 6, and the difference between example 7 and example 6 is that: the cholesteric liquid crystal in example 7 was modified and wrapped with a PVA film, the inventors believe that: the cholesteric liquid crystal is treated, so that the influence of external impurities on the cholesteric liquid crystal is reduced, the synergistic cooperation of the cholesteric liquid crystal and other components in the coating is further improved, and the color-changing stability of the coating is improved.
As can be seen from the data in table 2 in combination with examples 7-8, the discoloration time of the temperature-sensitive, color-changing aqueous coating of example 8 is shorter than the discoloration time of the temperature-sensitive, color-changing aqueous coating of example 7, and the difference between example 8 and example 7 is that: in the embodiment 8, the aluminum oxide is modified, so that the heat conduction capacity of the aluminum oxide is improved, and meanwhile, the temperature change speed of the paint is improved, the color change sensitivity of the paint is further improved, and the color change time of the paint is shortened.
As can be seen from the data in table 2 in combination with examples 8-9, the discoloration time of the temperature-sensitive, color-changing aqueous coating of example 9 is shorter than that of the temperature-sensitive, color-changing aqueous coating of example 8, and the difference between example 9 and example 8 is that: example 9 the particle size ratio of expanded perlite, nano titanium oxide, zinc oxide, and aluminum oxide in the modified aluminum oxide treatment process was adjusted so that the modified aluminum oxide had both a heat conductive layer and a heat storage layer to further improve the color change stability of the temperature-sensitive aqueous color-changing coating.
As can be seen by combining examples 9-10 and combining the data in Table 2, the temperature-sensitive color-changing water-based paint of example 10 has shorter color-changing time and better color-changing acuity, and the modification of the nano titanium dioxide is helpful for further improving the color-changing acuity.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (10)
1. The temperature-sensitive color-changing water-based paint is characterized by being mainly prepared from the following raw materials in parts by weight:
30-35 parts of acrylic emulsion;
3-4 parts of fluorocarbon resin;
0.5-0.7 part of defoaming agent;
0.5-1 part of wetting agent;
0.2-0.4 part of leveling agent;
1-1.5 parts of dispersing agent;
15-18 parts of water;
3-4 parts of carbon fiber;
0.5-0.8 part of film forming auxiliary agent;
10-20 parts of a color changing agent; the color-changing agent is at least two of cobalt chloride/aluminum oxide, cholesteric liquid crystal and polysilane;
5-10 parts of a color-changing reinforcing agent; the color-changing reinforcing agent consists of (8-10)/(3-5)/(4-6) by mass ratio of (8-5)/(3-5) by mass ratio of (expandable glass beads, expandable graphite, zirconium carbide and aluminum oxide.
2. The thermochromic aqueous coating according to claim 1, wherein: the mass ratio of the color-changing agent to the color-changing reinforcing agent is (15-18) to (6-8).
3. A thermochromic aqueous coating according to claim 2, wherein: the color-changing agent consists of cobalt chloride/alumina, cholesteric liquid crystal and polysilane according to the mass ratio of (5-6) (3-4) (1-2).
4. A thermochromic aqueous coating according to claim 3, wherein: the cholesteric liquid crystal is modified cholesteric liquid crystal, and the preparation method of the modified cholesteric liquid crystal comprises the following steps: mixing PVA, zinc oxide and water to obtain PVA water solution; adding cholesteric liquid crystal into PVA water solution, centrifuging and drying to obtain the final product.
5. The thermochromic aqueous coating according to claim 1, wherein: the alumina is modified alumina, and the preparation method of the modified alumina comprises the following steps: mixing aluminum oxide and zinc oxide to obtain a first mixture; mixing the mixture I, the expanded perlite and the binder to obtain a mixture II, mixing the mixture II with the nano titanium oxide, and drying to obtain the nano titanium oxide.
6. The thermochromic aqueous coating of claim 5, wherein: the grain size ratio of the expanded perlite to the nano titanium oxide to the alumina to the zinc oxide is (5-8)/(0.5-1)/(2-3).
7. The thermochromic aqueous coating of claim 5, wherein: the expanded perlite is roughened.
8. The thermochromic aqueous coating of claim 5, wherein: the nano titanium oxide is modified nano titanium oxide, and the preparation method of the modified nano titanium oxide comprises the following steps: s1, preparation of molybdenum oxide sol: mixing hydrochloric acid aqueous solution with sodium molybdate, and aging at pH <1 to obtain molybdenum oxide sol; s2, preparation of modified nano titanium dioxide: mixing the molybdenum oxide sol prepared in the step S1 with the nano titanium dioxide sol, collecting the precipitate generated in the mixing process, and washing and drying the precipitate to obtain the nano titanium dioxide sol.
9. The thermochromic aqueous coating according to claim 1, wherein: the particle size ratio (3-4) of the expanded glass beads, the expandable graphite, the zirconium carbide and the aluminum oxide is as follows: (1-2) and (5-6) and (2-3).
10. A method for preparing the temperature-sensitive color-changing water-based paint as claimed in any one of claims 1 to 9, characterized in that: comprises the following steps of (1) preparing a mixture: mixing a color changing agent, a color changing reinforcing agent, 1/4-1/3 of acrylic emulsion, carbon fiber and 1/5-1/4 of water to obtain a mixture;
(2) And (3) preparing a coating: uniformly mixing fluorocarbon resin, a defoaming agent, a wetting agent, a leveling agent, a dispersing agent, a film forming auxiliary agent, the mixture of the step (1), the rest of acrylic emulsion and the rest of water.
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