CN108912871B - Preparation method of water-based transparent heat-insulating glass coating - Google Patents
Preparation method of water-based transparent heat-insulating glass coating Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
- C09D127/22—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 a halogen; Coating compositions based on derivatives of such polymers modified by chemical after-treatment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
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- 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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
The invention relates to a preparation method of a water-based transparent heat-insulating glass coating, belonging to the technical field of preparation of building coatings. The invention has the innovation points that the modified polytetrafluoroethylene resin is used as a matrix, the nano titanium dioxide is used as a filler to prepare the glass coating, and the polytetrafluoroethylene resin modified by the adhesion promoter has ultrahigh adhesion, so that the performance of the water-based transparent heat-insulating glass coating is more comprehensive; the nano titanium dioxide is selected as the filler, organic pollutants adsorbed on the surface of the nano titanium dioxide can be decomposed into carbon dioxide and oxygen, the original brightness of the glass is kept, the good heat insulation effect can be achieved, the transparency of the glass is not affected, the adhesive force is strong, the service life is long, the water resistance is good, the viscosity resistance and the stain resistance are strong, the ultraviolet resistance is strong, the transmittance is high, the heat insulation effect is good, harmful organic matters such as indoor formaldehyde can be decomposed, and therefore the nano titanium dioxide has a very wide application prospect and advantages.
Description
Technical Field
The invention relates to a preparation method of a water-based transparent heat-insulating glass coating, belonging to the technical field of preparation of building coatings.
Background
The glass paint is one of paints, the glass surface is usually very smooth, the common paint is difficult to adhere to the glass surface, and the good glass paint forms a stable and hard paint film on the glass surface and can show the characteristics of high transparency and high gloss in appearance. The viscosity is generally low during construction, and meanwhile, the sagging phenomenon cannot be generated. It can be stably adhered to the surface of glassware, and can make the glassware beautiful and decorative by means of different colours. Since glass does not have good heat radiation insulating properties, the application of glass to buildings or structures or other fields has attracted much attention as a problem of high energy consumption. Especially, many buildings are provided with lighting glass of thousands to tens of thousands of square meters, when the external environment temperature is higher, the lighting glass absorbs a large amount of heat energy, the indoor temperature of the building is directly increased, and some can reach more than 40 ℃; when the temperature of the external environment is low, the lighting glass can radiate a large amount of heat energy outwards, so that the indoor temperature is low, and the lowest temperature can reach minus 30 ℃ in winter. In the prior art, an air conditioner or a heating device is generally used for regulating the indoor temperature, but the air conditioner or the heating device needs electric energy or other energy sources to maintain the normal operation of the air conditioner or the heating device, so that the energy sources are greatly wasted.
The glass performance is changed to reduce the loss of heat energy, the most effective method is to inhibit the radiation of the surface of the glass, but the prior glass coating for inhibiting the radiation of the surface of the glass can not meet the requirements on effectiveness, hardness, adhesive force, service life and the like; the opacity and high reflectivity of visible light limit the development and application range of the composite material, and the waterproof durability is poor.
Therefore, the transparent heat-insulating glass coating provided by the invention has the advantages of strong adhesive force, long service life, good water resistance, high light transmittance and good heat-insulating effect, and has positive significance in the technical field of building coating preparation.
Disclosure of Invention
The invention mainly solves the technical problems of poor heat insulation effect, low light transmittance, over expensive manufacturing cost, poor water resistance and aging resistance, poor adhesion and the like of the traditional glass coating at present and provides a preparation method of a water-based transparent heat insulation glass coating.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a preparation method of a water-based transparent heat-insulating glass coating is characterized by comprising the following specific preparation steps:
(1) adding tetrabutyl titanate and absolute ethyl alcohol into a reaction kettle, stirring at the rotating speed of 200-300 r/min to obtain a titanium alkoxide solution, mixing the titanium alkoxide solution with water, adjusting the pH of the solution by hydrochloric acid, and reacting to obtain titanium dioxide sol;
(2) mixing the titanium dioxide sol and phenol to obtain a mixture, mixing the mixture and n-heptane according to the equal mass ratio to obtain a pre-reaction liquid, stirring, continuously dripping a formaldehyde solution accounting for 10% of the mass of the pre-reaction liquid into the reaction kettle, standing to obtain a pre-product, putting the pre-product into a muffle furnace, and roasting to obtain a titanium dioxide porous spherical nanocrystal;
(3) adding 80-100 parts by weight of deionized water, 8-10 parts by weight of stearamide and 8-10 parts by weight of polyethylene glycol into a high-speed dispersion machine, uniformly stirring, adding 30-40 parts by weight of the prepared titanium dioxide porous spherical nanocrystal, adjusting the pH value by using sodium bicarbonate, and dispersing and sanding at the rotating speed of 3000-4000 r/min to obtain titanium dioxide nano slurry for later use;
(4) adding ethylene glycol methacrylate phosphate and polytetrafluoroethylene resin into an ultrasonic oscillator, and ultrasonically mixing to prepare a premix; adding the premix into a reaction kettle with a reflux condenser and a stirrer, heating the reaction kettle, stirring at the rotating speed of 600-800 r/min, reacting, and discharging to obtain modified polytetrafluoroethylene resin;
(5) according to the weight parts, 10-12 parts of polyethylene glycol, 8-10 parts of polydimethylsiloxane, 9-13 parts of propylene glycol butyl ether, 10-15 parts of sodium carboxymethylcellulose and 400-500 parts of modified polytetrafluoroethylene resin are added into a high-speed dispersion machine, high-speed dispersion is carried out at the rotating speed of 1000-1500 r/min, then the rotating speed is reduced to 400-500 r/min, 20-30 parts of standby titanium dioxide nano slurry is added, and stirring is continued to obtain the water-based transparent heat-insulating glass coating.
The molar ratio of tetrabutyl titanate to absolute ethyl alcohol in the step (1) is 9:2, the molar ratio of titanium alkoxide to water is 25:3, the concentration of hydrochloric acid is 0.5mol/L, the pH value is adjusted to 3-5, and the reaction time is 30-60 min.
The molar ratio of the titanium dioxide sol to the phenol in the step (2) is 4:1, the concentration of the formaldehyde solution is 1mol/L, the standing temperature is 80-90 ℃, the time is 1.5-2.0 h, the roasting time is 2-3 h, and the roasting temperature is 500-600 ℃.
And (3) adjusting the pH to 7.5-8.0 and the time of dispersing and sanding to 6-8 h, wherein the mass fraction of the sodium bicarbonate in the step (3) is 30%.
The mass ratio of the ethylene glycol methacrylate phosphate to the polytetrafluoroethylene resin in the step (4) is 1:100, the mixing time is 1.0-1.5 h, the temperature is increased to 80-90 ℃, and the reaction time is 20-24 h.
The dispersing time in the step (5) is 30-40 min, and the continuous stirring time is 30-40 min.
The invention has the beneficial effects that:
the invention firstly prepares titanium dioxide porous ball nano crystal, namely nano titanium dioxide by a sol-gel method, then processes the nano titanium dioxide to prepare nano titanium dioxide slurry, then adds an adhesion promoter into polytetrafluoroethylene resin to modify the polytetrafluoroethylene resin, and finally mixes the nano titanium dioxide slurry and the modified polytetrafluoroethylene resin to obtain the water-based transparent heat-insulating glass coating. The transmittance of the coating is very high, and secondly, because the F-C bond has small bond polarity, the fluorocarbon polymer has low surface energy, compared with other resins, the critical surface tension of the fluorocarbon resin is the lowest, so that the coating resin has excellent viscosity resistance and dirt resistance, and the introduction of fluorine atoms can improve the water resistance, oil resistance, ultraviolet resistance and other capabilities of the coating, so that the performance of the water-based transparent heat-insulating glass coating is more comprehensive; secondly, the nano titanium dioxide is selected as the filler, and three aspects of advantages are achieved; on the first hand, under the action of ultraviolet rays in sunlight or lamplight, the nano titanium dioxide can be activated and generate free radicals with high catalytic activity, can generate strong photooxidation and reduction capability and can act on hydrocarbon, so that organic pollutants adsorbed on the surface of the nano titanium dioxide can be decomposed into carbon dioxide and oxygen, and the carbon dioxide and the oxygen can be washed away by rainwater together with the residual inorganic matters, thereby realizing the self-cleaning function; in the second aspect, the nano titanium dioxide has strong super-hydrophilicity, water drops are not easy to form on the surface of the nano titanium dioxide, so that a uniform water film can be formed on the surface of the glass coated with the water-based transparent heat-insulating glass coating, the original brightness of the glass is kept, the nano titanium dioxide is convenient to scrub and can be quickly dried; in the third aspect, the energy of solar radiation is mainly concentrated in the wavelength range of 0.2-2.5 μm, wherein the ultraviolet region is 0.2-0.4 μm and accounts for 5% of the total energy, the visible region is 0.4-0.72 μm and accounts for 45% of the total energy, the near-infrared region is 0.72-2.5 μm and accounts for 50% of the total energy, visible light and most of the energy in the solar spectrum are distributed in the visible region and the near-infrared region, wherein the near-infrared region accounts for half of the energy, infrared light does not contribute to the visual effect, if the energy is effectively blocked, a good heat insulation effect can be achieved without affecting the transparency of glass, nano titanium dioxide has ideal selectivity to the solar spectrum, has high transmittance in the visible region and good shielding effect on infrared light, and has large activity due to small particle size, can reflect, scatter and absorb ultraviolet rays, therefore, the water-based transparent heat-insulating glass coating which takes the modified polytetrafluoroethylene resin as the matrix and the nano titania as the filler has the advantages of strong adhesive force, long service life, good water resistance, strong viscosity resistance and dirt resistance, strong ultraviolet resistance, high light transmittance and good heat-insulating effect, and has self-cleaning capability, can keep the surface of glass clean, and can decompose harmful organic matters such as indoor formaldehyde, and the like, so the water-based transparent heat-insulating glass coating has very wide application prospect and advantages.
Detailed Description
Mixing tetrabutyl titanate and absolute ethyl alcohol according to a molar ratio of 9:2, adding the mixture into a reaction kettle, stirring at a rotating speed of 200-300 r/min to obtain titanium alkoxide sol, mixing the titanium alkoxide sol and water according to a molar ratio of 25:3, adjusting the pH of the solution to 3-5 by using hydrochloric acid with the concentration of 0.5mol/L, and reacting for 30-60 min to obtain titanium dioxide sol; mixing the titanium dioxide sol and phenol according to a molar ratio of 4:1 to obtain a mixture, mixing the mixture and n-heptane according to an equal mass ratio to obtain a pre-reaction liquid, continuously dripping a formaldehyde solution with the concentration of 1mol/L, the mass of which is 10% of that of the pre-reaction liquid, into a reaction kettle while stirring, standing for 1.5-2.0 hours at 80-90 ℃ to obtain a pre-product, then putting the pre-product into a muffle furnace, and roasting for 2-3 hours at 500-600 ℃ to obtain a titanium dioxide porous spherical nanocrystal; adding 80-100 parts by weight of deionized water, 8-10 parts by weight of stearamide and 8-10 parts by weight of polyethylene glycol into a high-speed dispersion machine, uniformly stirring, adding 30-40 parts by weight of the prepared titanium dioxide porous spherical nanocrystal, adjusting the pH value to 7.5-8.0 by using 30% by weight of sodium bicarbonate, and dispersing and sanding for 6-8 hours at the rotating speed of 3000-4000 r/min to obtain titanium dioxide nano slurry for later use; adding ethylene glycol methacrylate phosphate and polytetrafluoroethylene resin into an ultrasonic oscillator according to the mass ratio of 1:100, and ultrasonically mixing for 1.0-1.5 h to prepare a premix; adding the premix into a reaction kettle with a reflux condenser and a stirrer, heating the reaction kettle to 80-90 ℃, stirring at the rotating speed of 600-800 r/min, reacting for 20-24 h, and discharging to obtain modified polytetrafluoroethylene resin; according to the weight parts, 10-12 parts of polyethylene glycol, 8-10 parts of polydimethylsiloxane, 9-13 parts of propylene glycol butyl ether, 10-15 parts of sodium carboxymethylcellulose and 400-500 parts of modified polytetrafluoroethylene resin are added into a high-speed dispersion machine, dispersed at a high speed of 1000-1500 r/min for 30-40 min, then reduced to 400-500 r/min, added with 20-30 parts of standby titanium dioxide nano slurry, and continuously stirred for 30-40 min, so that the water-based transparent heat-insulating glass coating is obtained.
Example 1
Mixing tetrabutyl titanate and absolute ethyl alcohol according to a molar ratio of 9:2, adding the mixture into a reaction kettle, stirring at a rotating speed of 200r/min to obtain titanium alkoxide sol, mixing the titanium alkoxide sol and water according to a molar ratio of 25:3, adjusting the pH of the solution to 3 by using hydrochloric acid with the concentration of 0.5mol/L, and reacting for 30min to obtain titanium dioxide sol; mixing the titanium dioxide sol and phenol according to a molar ratio of 4:1 to obtain a mixture, mixing the mixture and n-heptane according to an equal mass ratio to obtain a pre-reaction liquid, continuously dripping 10% by mass of a formaldehyde solution with the concentration of 1mol/L into a reaction kettle while stirring, standing for 1.5 hours at 80 ℃ to obtain a pre-product, putting the pre-product into a muffle furnace, and roasting for 2 hours at 500 ℃ to obtain a titanium dioxide porous spherical nanocrystal; adding 80 parts by weight of deionized water, 8 parts by weight of stearamide and 8 parts by weight of polyethylene glycol into a high-speed dispersion machine, uniformly stirring, then adding 30 parts by weight of the prepared titanium dioxide porous spherical nanocrystal, adjusting the pH value to 7.5 by using 30% sodium bicarbonate by mass fraction, and dispersing and sanding for 6 hours at the rotating speed of 3000r/min to obtain titanium dioxide nano slurry for later use; adding ethylene glycol methacrylate phosphate and polytetrafluoroethylene resin into an ultrasonic oscillator according to the mass ratio of 1:100, and ultrasonically mixing for 1.0h to prepare a premix; adding the premix into a reaction kettle with a reflux condenser and a stirrer, heating the reaction kettle to 80 ℃, stirring at the rotating speed of 600r/min, reacting for 20 hours, and discharging to obtain modified polytetrafluoroethylene resin; adding 10 parts by weight of polyethylene glycol, 8 parts by weight of polydimethylsiloxane, 9 parts by weight of propylene glycol butyl ether, 10 parts by weight of sodium carboxymethylcellulose and 400 parts by weight of modified polytetrafluoroethylene resin into a high-speed dispersion machine, dispersing at a high speed of 1000r/min for 30min, reducing the rotating speed to 400r/min, adding 20 parts by weight of standby titanium dioxide nano slurry, and continuously stirring for 30min to obtain the water-based transparent heat-insulating glass coating.
Example 2
Mixing tetrabutyl titanate and absolute ethyl alcohol according to a molar ratio of 9:2, adding the mixture into a reaction kettle, stirring at a rotating speed of 250r/min to obtain titanium alkoxide sol, mixing the titanium alkoxide sol and water according to a molar ratio of 25:3, adjusting the pH of the solution to be 4 by using hydrochloric acid with the concentration of 0.5mol/L, and reacting for 45min to obtain titanium dioxide sol; mixing the titanium dioxide sol and phenol according to a molar ratio of 4:1 to obtain a mixture, mixing the mixture and n-heptane according to an equal mass ratio to obtain a pre-reaction liquid, continuously dripping 10% by mass of formaldehyde solution with the concentration of 1mol/L into a reaction kettle while stirring, standing for 1.7h at 85 ℃ to obtain a pre-product, putting the pre-product into a muffle furnace, and roasting for 2.5h at 550 ℃ to obtain a titanium dioxide porous spherical nanocrystal; adding 85 parts of deionized water, 9 parts of stearamide and 9 parts of polyethylene glycol into a high-speed dispersion machine according to parts by weight, uniformly stirring, then adding 35 parts of the prepared titanium dioxide porous spherical nanocrystal, adjusting the pH value to 7.7 by using 30% sodium bicarbonate by mass fraction, and dispersing and sanding for 7 hours at the rotating speed of 3500r/min to obtain titanium dioxide nano slurry for later use; adding ethylene glycol methacrylate phosphate and polytetrafluoroethylene resin into an ultrasonic oscillator according to the mass ratio of 1:100, and ultrasonically mixing for 1.2h to prepare a premix; adding the premix into a reaction kettle with a reflux condenser and a stirrer, heating the reaction kettle to 85 ℃, stirring at the rotating speed of 700r/min, reacting for 22 hours, and discharging to obtain modified polytetrafluoroethylene resin; adding 11 parts by weight of polyethylene glycol, 9 parts by weight of polydimethylsiloxane, 11 parts by weight of propylene glycol butyl ether, 12 parts by weight of sodium carboxymethylcellulose and 450 parts by weight of modified polytetrafluoroethylene resin into a high-speed dispersion machine, dispersing at a high speed of 1200r/min for 35min, reducing the rotating speed to 450r/min, adding 25 parts by weight of standby titanium dioxide nano slurry, and continuously stirring for 35min to obtain the water-based transparent heat-insulating glass coating.
Example 3
Mixing tetrabutyl titanate and absolute ethyl alcohol according to a molar ratio of 9:2, adding the mixture into a reaction kettle, stirring at a rotating speed of 300r/min to obtain titanium alkoxide sol, mixing the titanium alkoxide sol and water according to a molar ratio of 25:3, adjusting the pH of the solution to be 5 by using hydrochloric acid with the concentration of 0.5mol/L, and reacting for 60min to obtain titanium dioxide sol; mixing the titanium dioxide sol and phenol according to a molar ratio of 4:1 to obtain a mixture, mixing the mixture and n-heptane according to an equal mass ratio to obtain a pre-reaction liquid, continuously dripping 10% by mass of formaldehyde solution with the concentration of 1mol/L into a reaction kettle while stirring, standing for 2.0 hours at 90 ℃ to obtain a pre-product, then putting the pre-product into a muffle furnace, and roasting for 3 hours at 600 ℃ to obtain the titanium dioxide porous spherical nanocrystal; adding 100 parts by weight of deionized water, 10 parts by weight of stearamide and 10 parts by weight of polyethylene glycol into a high-speed dispersion machine, uniformly stirring, adding 40 parts by weight of the prepared titanium dioxide porous spherical nanocrystal, adjusting the pH value to 8.0 by using 30% by mass of sodium bicarbonate, and dispersing and sanding for 8 hours at the rotating speed of 4000r/min to obtain titanium dioxide nano slurry for later use; adding ethylene glycol methacrylate phosphate and polytetrafluoroethylene resin into an ultrasonic oscillator according to the mass ratio of 1:100, and ultrasonically mixing for 1.5h to prepare a premix; adding the premix into a reaction kettle with a reflux condenser and a stirrer, heating the reaction kettle to 90 ℃, stirring at the rotating speed of 800r/min, reacting for 24 hours, and discharging to obtain modified polytetrafluoroethylene resin; adding 12 parts by weight of polyethylene glycol, 10 parts by weight of polydimethylsiloxane, 13 parts by weight of propylene glycol butyl ether, 15 parts by weight of sodium carboxymethylcellulose and 500 parts by weight of modified polytetrafluoroethylene resin into a high-speed dispersion machine, dispersing at a high speed of 1500r/min for 40min, reducing the rotating speed to 500r/min, adding 30 parts by weight of standby titanium dioxide nano slurry, and continuously stirring for 40min to obtain the water-based transparent heat-insulating glass coating.
Comparative example
The performance of the aqueous transparent heat-insulating glass paint prepared by the invention and the aqueous transparent heat-insulating glass paint in the comparative example are detected by taking the aqueous transparent heat-insulating glass paint produced by a certain Hangzhou company as the comparative example, and the detection results are shown in Table 1:
the test method comprises the following steps:
water absorption test adopts a water absorption experimental method to carry out performance detection, and the change condition of the surface paint film is observed.
Testing the heat insulation performance: the glass coatings in examples 1 to 3 and comparative examples were selected and respectively coated on the outer walls of glassware of the same specification of 10cm × 5cm × 5cm, the same amount of 90 ℃ hot water was poured into each glassware, the glassware was placed at room temperature, and the temperature of the outer wall of the glassware was measured every 10 minutes, and the results were as follows.
The light transmittance and haze measurements were measured using an electro-optical haze meter.
The hardness test is carried out according to the GB6379-86 standard.
The adhesion test was carried out according to the GB1720-79 (circle drawing) standard.
The heat aging test is carried out according to the standard GB/T9755-20015.12:
the yellowing index test method is tested according to the theory of yellowing series delta Yi, and the yellowing index is divided into:
level 0: no color change, and delta Yi is less than or equal to 1.5;
level 1: slightly discolor, delta Yi is more than 1.6 and less than or equal to 3.0;
and 2, stage: slightly discoloring, wherein delta Yi is more than 3.1 and less than or equal to 6.0;
and 3, level: obvious color change, delta Yi is more than 6.1 and less than or equal to 9.0;
4, level: large color change, delta Yi is more than 9.1 and less than or equal to 12.0;
and 5, stage: severe discoloration, 12.0 < Δ Yi.
TABLE 1 glass coating Property measurement results
According to the data, the water-based transparent heat-insulating glass coating prepared by the invention has good waterproof effect, the degree of temperature rise of the outer wall of the vessel in the same time is slower than that of the outer wall of the vessel in the proportion, the glass coating prepared by the invention has good heat-insulating property, high light transmittance, good adhesive force, good aging resistance, low yellowing index, no cracking, no bubble, no pulverization and wide application prospect.
Claims (6)
1. A preparation method of a water-based transparent heat-insulating glass coating is characterized by comprising the following specific preparation steps:
(1) adding tetrabutyl titanate and absolute ethyl alcohol into a reaction kettle, stirring at the rotating speed of 200-300 r/min to obtain a titanium alkoxide solution, mixing the titanium alkoxide solution with water, adjusting the pH of the solution by hydrochloric acid, and reacting to obtain titanium dioxide sol;
(2) mixing the titanium dioxide sol and phenol to obtain a mixture, mixing the mixture and n-heptane according to the equal mass ratio to obtain a pre-reaction liquid, stirring, continuously dripping a formaldehyde solution accounting for 10% of the mass of the pre-reaction liquid into the reaction kettle, standing to obtain a pre-product, putting the pre-product into a muffle furnace, and roasting to obtain a titanium dioxide porous spherical nanocrystal;
(3) adding 80-100 parts by weight of deionized water, 8-10 parts by weight of stearamide and 8-10 parts by weight of polyethylene glycol into a high-speed dispersion machine, uniformly stirring, adding 30-40 parts by weight of the prepared titanium dioxide porous spherical nanocrystal, adjusting the pH value by using sodium bicarbonate, and dispersing and sanding at the rotating speed of 3000-4000 r/min to obtain titanium dioxide nano slurry for later use;
(4) adding ethylene glycol methacrylate phosphate and polytetrafluoroethylene resin into an ultrasonic oscillator, and ultrasonically mixing to prepare a premix; adding the premix into a reaction kettle with a reflux condenser and a stirrer, heating the reaction kettle, stirring at the rotating speed of 600-800 r/min, reacting, and discharging to obtain modified polytetrafluoroethylene resin;
(5) according to the weight parts, 10-12 parts of polyethylene glycol, 8-10 parts of polydimethylsiloxane, 9-13 parts of propylene glycol butyl ether, 10-15 parts of sodium carboxymethylcellulose and 400-500 parts of modified polytetrafluoroethylene resin are added into a high-speed dispersion machine, high-speed dispersion is carried out at the rotating speed of 1000-1500 r/min, then the rotating speed is reduced to 400-500 r/min, 20-30 parts of standby titanium dioxide nano slurry is added, and stirring is continued to obtain the water-based transparent heat-insulating glass coating.
2. The preparation method of the water-based transparent heat insulation glass coating according to claim 1, characterized in that: the molar ratio of tetrabutyl titanate to absolute ethyl alcohol in the step (1) is 9:2, the molar ratio of titanium alkoxide to water is 25:3, the concentration of hydrochloric acid is 0.5mol/L, the pH value is adjusted to 3-5, and the reaction time is 30-60 min.
3. The preparation method of the water-based transparent heat insulation glass coating according to claim 1, characterized in that: the molar ratio of the titanium dioxide sol to the phenol in the step (2) is 4:1, the concentration of the formaldehyde solution is 1mol/L, the standing temperature is 80-90 ℃, the time is 1.5-2.0 h, the roasting time is 2-3 h, and the roasting temperature is 500-600 ℃.
4. The preparation method of the water-based transparent heat insulation glass coating according to claim 1, characterized in that: and (3) adjusting the pH to 7.5-8.0 and the time of dispersing and sanding to 6-8 h, wherein the mass fraction of the sodium bicarbonate in the step (3) is 30%.
5. The preparation method of the water-based transparent heat insulation glass coating according to claim 1, characterized in that: the mass ratio of the ethylene glycol methacrylate phosphate to the polytetrafluoroethylene resin in the step (4) is 1:100, the mixing time is 1.0-1.5 h, the temperature is increased to 80-90 ℃, and the reaction time is 20-24 h.
6. The preparation method of the water-based transparent heat insulation glass coating according to claim 1, characterized in that: the dispersing time in the step (5) is 30-40 min, and the continuous stirring time is 30-40 min.
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|---|---|---|---|---|
| CN102732108A (en) * | 2012-07-16 | 2012-10-17 | 惠州市彩田化工实业有限公司 | Aqueous self-cleaning transparent heat-insulated nano-dope capable of fully shielding infrared ray and ultraviolet ray |
| CN105219249A (en) * | 2015-11-16 | 2016-01-06 | 重庆建工住宅建设有限公司 | A kind of luminous reflectance thermal insulating coating |
| CN106752237A (en) * | 2016-12-14 | 2017-05-31 | 深圳市兆新能源股份有限公司 | Water-borne heat-insulating slurry and preparation method thereof and water-borne heat-insulating glass coating and preparation method thereof |
| CN109082181A (en) * | 2018-07-09 | 2018-12-25 | 中南大学 | Reflection-type Water-based thermal insulation coating and preparation method thereof |
-
2018
- 2018-08-02 CN CN201810873068.9A patent/CN108912871B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732108A (en) * | 2012-07-16 | 2012-10-17 | 惠州市彩田化工实业有限公司 | Aqueous self-cleaning transparent heat-insulated nano-dope capable of fully shielding infrared ray and ultraviolet ray |
| CN105219249A (en) * | 2015-11-16 | 2016-01-06 | 重庆建工住宅建设有限公司 | A kind of luminous reflectance thermal insulating coating |
| CN106752237A (en) * | 2016-12-14 | 2017-05-31 | 深圳市兆新能源股份有限公司 | Water-borne heat-insulating slurry and preparation method thereof and water-borne heat-insulating glass coating and preparation method thereof |
| CN109082181A (en) * | 2018-07-09 | 2018-12-25 | 中南大学 | Reflection-type Water-based thermal insulation coating and preparation method thereof |
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| CN108912871A (en) | 2018-11-30 |
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