CN112812675A - Novel automobile glass light-transmitting heat-insulating film and preparation method thereof - Google Patents
Novel automobile glass light-transmitting heat-insulating film and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the field of functional materials, and particularly relates to a novel automobile glass light-transmitting heat-insulating film and a preparation method thereof. According to the invention, vanadium dioxide nano particles and hydrochloric acid are codoped with polyaniline, and then are mixed with nano tin oxide antimony red to prepare the novel automobile glass light-transmitting heat-insulating film, the film has the effects of being warm in winter and cool in summer, and can correspondingly play a heat-insulating or heat-absorbing effect according to the external temperature, in winter, when the external temperature of an automobile is lower than the internal temperature of the automobile, the automobile film can absorb heat generated by ultraviolet and infrared light irradiation outside the automobile, in summer, when the external temperature is high, the automobile film can effectively reflect and insulate heat, so that the heat-insulating effect is achieved, the load of an air conditioner and the consumption of fuel oil are greatly reduced, and the riding comfort is improved.
Description
Technical Field
The invention belongs to the field of functional materials, and particularly relates to a novel automobile glass light-transmitting heat-insulating film and a preparation method thereof.
Background
The automobile glass plays an important role in large-area lighting of automobiles, but the common automobile glass has high sunlight transmittance and poor ultraviolet light and infrared light barrier property. In hot summer, the surface temperature and the internal environment temperature of the automobile are increased to different degrees under the continuous irradiation of sunlight, so that the comfort level of the automobile is reduced, the service life of each part of the automobile is greatly shortened, and faults and even dangers are easily caused; and the vehicle-mounted air conditioner is used for keeping comfort, so that the load of the air conditioner and the consumption of fuel are greatly increased. The appearance of the heat insulation window film greatly improves the driving environment of the automobile, enhances the driving safety and reduces the energy consumption of the automobile, and is gradually accepted by the majority of automobile owners.
The spectral energy distribution of the sunlight radiated to the surface of the earth is as follows: the ultraviolet region is 200-380 nm and accounts for 5% of the total energy; the visible light area is 380-780 nm and accounts for 45% of the total energy; the near infrared region is 780-2500 nm and accounts for 50% of the total energy. Solar energy is mainly concentrated in the visible and near infrared regions. And about 95% of the infrared radiation energy is concentrated in the wavelength range of 780-1500 nm, i.e. near infrared range. An ideal transparent heat-insulating semiconductor material should have good transmittance to the visible light part of sunlight and good blocking and reflecting effects to near-infrared light.
Currently, heat insulation films are classified into the following three types according to heat insulation mechanism and heat insulation form: barrier type heat insulating film, reflection type heat insulating film, spectrum selection type heat insulating film. The heat insulation effect of the barrier type heat insulation film is achieved mainly through the barrier property of materials to sunlight, and for example, the effective method for preparing the heat insulation film is to adopt doped modification of ordered mesoporous inorganic nano particles. The reflective heat insulation film achieves the heat insulation effect by reflecting part of sunlight, the reflective heat insulation film is commonly formed by plating a layer of metal, generally aluminum, potassium and other metals on a base material by adopting a magnetron sputtering or evaporation process, and the metal film has high reflectivity in a visible light region and an infrared region because the intrinsic plasma wavelength of the metal is in the ultraviolet region, so the heat reflection glass plated with the metal film has good heat insulation performance but low visible light transmittance. The spectrum selection type heat insulation film is generally suitable for heat insulation films with high requirements on visible light by adopting materials which have high transmittance on visible light and can block most of ultraviolet light and infrared light to realize heat insulation. The novel heat insulation film usually adopts noble metal as a raw material, and has high cost and high technical requirement.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention mainly aims to provide a preparation method of a novel light-transmitting and heat-insulating film for automobile glass.
The invention also aims to provide a novel automobile glass light-transmitting heat-insulating film prepared by the preparation method, and the heat-insulating film has better light transmission and good heat insulation.
The invention further aims to provide application of the novel automobile glass light-transmitting heat-insulating film.
The purpose of the invention is realized by the following technical scheme:
a preparation method of a novel light-transmitting and heat-insulating film for automobile glass comprises the following steps:
(1) dissolving ammonium metavanadate in water, and then dropwise adding formic acid until the pH value of the system is 2-3 to obtain a mixed solution; stirring the mixed solution at 180-220 ℃ for reaction for 1-3 d, carrying out suction filtration on a product, washing, drying, and carrying out heat treatment at 300-450 ℃ for 1-3 h to obtain vanadium dioxide nanoparticles;
(2) dispersing the vanadium dioxide nano particles prepared in the step (1) in 0.8-1.0 mol/L hydrochloric acid to obtain vanadium dioxide dispersion liquid; mixing aniline and hydrochloric acid with the concentration of 0.8-1.0 mol/L, stirring for 30-60 min, adding the vanadium dioxide dispersion liquid, and continuously stirring for 10-20 min to obtain a mixed reaction liquid;
(3) controlling the temperature of the mixed reaction liquid in the step (2) to be 0-4 ℃, then dropwise adding a hydrochloric acid solution of ammonium persulfate, continuously stirring for 2-4 h after dropwise adding is finished, and performing suction filtration, washing and drying on a product to obtain a polyaniline vanadium dioxide composite material;
(4) dispersing the polyaniline vanadium dioxide composite material prepared in the step (3) and nano tin antimony oxide in water to obtain mixed slurry; adding the mixed slurry into waterborne polyurethane to obtain a mixed resin system, then coating the mixed resin system on automobile glass, and curing to form a film to obtain a novel automobile glass light-transmitting heat-insulating film;
the concentration of the mixed liquid ammonium metavanadate in the step (1) is 1-2 wt%;
the concentration of the vanadium dioxide nano particles in the mixed system in the step (2) is 40-50 mg/mL;
the concentration of aniline in the mixed system in the step (2) is preferably 0.1-0.2 mol/L, and excessive aniline concentration can cause a large amount of intrinsic polyaniline to be deposited, so that the infrared absorption performance of the polyaniline is poor, and the heat insulation performance of the film is further influenced;
the molar ratio of the ammonium persulfate in the step (3) to the aniline in the step (2) is preferably 1: 1;
the ammonium persulfate concentration in the hydrochloric acid solution of ammonium persulfate in the step (3) is 0.5-1.0 mol/L, and the hydrochloric acid concentration is 0.8-1.0 mol/L;
the mass ratio of the polyaniline vanadium dioxide composite material, the nano tin antimony oxide and the waterborne polyurethane in the step (4) is preferably (3-5): (3-5) 100;
the automobile glass in the step (4) is preferably pretreated as follows:
cleaning the surface of the glass with alcohol, washing with clear water, and drying for later use;
the mixed resin system in the step (4) preferably further comprises at least one of assistants such as a leveling agent, a thickening agent and a defoaming agent;
the auxiliary agents such as the flatting agent, the thickening agent, the defoaming agent and the like
A novel automobile glass light-transmitting heat-insulating film is prepared by the preparation method;
the novel automobile glass light-transmitting heat-insulating film is applied to the field of automobile protection;
the novel automobile glass comprises the novel automobile glass light-transmitting heat-insulating film;
the automobile glass can contain an antiwear layer, a safe substrate layer and the like outside the novel automobile glass light-transmitting heat-insulating film layer.
Vanadium dioxide is a metal oxide with phase change property, the phase change temperature of the vanadium dioxide is 68 ℃, the structural change before and after phase change causes reversible conversion from transmission to reflection of infrared light, wherein, at low temperature, M phase is a monoclinic crystal structure and has high transmittance to infrared light, and at high temperature, the vanadium dioxide is converted into an R phase tetragonal crystal structure and has high reflection effect to infrared light, so that the vanadium dioxide is an excellent intelligent temperature control material. Polyaniline is a macromolecule with strong interaction and conjugated big pi bonds, and has excellent anti-corrosion performance and antistatic performance.
Nanometer Antimony Tin Oxide (ATO) has high reflectivity in an infrared region, high transmittance in a visible region and high absorption rate in an ultraviolet region, and is an ideal light-transmitting and heat-insulating material.
According to the invention, vanadium dioxide and hydrochloric acid are codoped with polyaniline, and the prepared doped polyaniline has good infrared absorption and corrosion resistance. Then mix with nanometer tin antimony oxide (ATO) red, prepare and obtain novel car glass printing opacity heat insulating film, this membrane has the effect of warm in winter and cool in summer, can be according to the ambient temperature height and correspondingly play thermal-insulated or endothermic effect, in winter, when the outside temperature of car is lower than the interior temperature of car, the car membrane can absorb the outside ultraviolet ray of car and the heat that the infrared light shines the production, in summer, when the outside temperature is high, this car membrane then can effectual reflection thermal-insulated, play thermal-insulated effect, greatly reduce the load of air conditioner and the consumption of fuel, improve the comfort level of riding.
Compared with the prior art, the invention has the following advantages and effects:
(1) the novel automobile glass light-transmitting heat-insulating film prepared by the invention is not only simple in heat insulation, but also belongs to an intelligent temperature control film due to the addition of the nano vanadium dioxide, and can correspondingly play a heat insulation or heat absorption effect according to the outside temperature.
(2) According to the invention, vanadium dioxide nano particles and polyaniline are subjected to in-situ polymerization to prepare the composite material, so that the prepared novel automobile glass light-transmitting heat-insulating film has good infrared absorption, reflection and corrosion resistance and antistatic property.
(3) Compared with physical vapor deposition (vacuum evaporation, magnetron sputtering and the like), the preparation method is simple, the cost is low, and the prepared heat-insulating film has good performance.
Drawings
Fig. 1 is a diagram illustrating the analysis of the heat insulating performance of the heat insulating film in a summer environment.
Fig. 2 is a diagram illustrating the analysis of the heat insulation performance of the heat insulation film in the winter environment.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
Example 1
(1) Weighing 1.0g of ammonium metavanadate, adding the ammonium metavanadate into 100mL of water, and heating the mixture at 65 ℃ until the ammonium metavanadate is dissolved; then, formic acid is dropwise added until the pH value of the system is 2.0, so as to obtain a mixed solution; stirring the mixed solution at 200 ℃ for 2d, carrying out suction filtration, washing, drying and carrying out heat treatment at 350 ℃ for 2.5h to obtain M-phase vanadium dioxide nanoparticles;
(2) dispersing the M-phase vanadium dioxide nano particles prepared in the step (1) in 1.0mol/L hydrochloric acid to obtain vanadium dioxide nano particle dispersion liquid with the concentration of 90 mg/mL; mixing 0.03mol of aniline (about 2.73mL) and 100mL of hydrochloric acid with the concentration of 1.0mol/L, stirring for 50min to obtain an aniline hydrochloric acid solution with the concentration of 0.3mol/L, then adding the vanadium dioxide nanoparticle dispersion liquid with the same volume into the aniline hydrochloric acid solution, and continuously stirring for 15min to obtain a mixed reaction liquid, wherein the concentration of the vanadium dioxide nanoparticles is 45mg/mL, and the concentration of the aniline is 0.15 mol/L;
(3) preparing an ammonium persulfate aqueous solution containing hydrochloric acid, wherein the concentration of ammonium persulfate is 0.8mol/L, the concentration of hydrochloric acid is 1.0mol/L, controlling the temperature of the mixed reaction liquid in the step (2) to be 0 ℃, then dropwise adding the ammonium persulfate hydrochloric acid solution according to the molar ratio of ammonium persulfate to aniline of 1:1, continuously stirring for 3 hours after dropwise adding is completed, and performing suction filtration, washing and drying on a product to obtain the polyaniline vanadium dioxide composite material;
(4) dispersing 4.8g of the polyaniline vanadium dioxide composite material prepared in the step (3) and 4.0g of nano tin antimony oxide in water to obtain mixed slurry; adding the mixed slurry into 100g of waterborne polyurethane to obtain a mixed resin system;
(5) cleaning the surface of the glass with alcohol, washing with clear water, and drying for later use; and (5) coating the mixed resin system prepared in the step (4) on a glass slide, and curing to form a film, so as to obtain the novel automobile glass light-transmitting heat-insulating film.
Example 2
(1) Weighing 1.56g of ammonium metavanadate, adding the ammonium metavanadate into 100mL of water, and heating the mixture at 70 ℃ until the ammonium metavanadate is dissolved; then dripping formic acid until the pH value of the system is 3 to obtain a mixed solution; stirring the mixed solution at 180 ℃ for reaction for 3d, carrying out suction filtration on a product, washing, drying, and carrying out heat treatment at 300 ℃ for 3h to obtain M-phase vanadium dioxide nanoparticles;
(2) dispersing the M-phase vanadium dioxide nano particles prepared in the step (1) in 0.8mol/L hydrochloric acid to obtain vanadium dioxide nano particle dispersion liquid with the concentration of 80 mg/mL; mixing 0.02mol of aniline (about 1.82mL) and 100mL of hydrochloric acid with the concentration of 0.8mol/L, stirring for 30min to obtain an aniline hydrochloric acid solution with the concentration of 0.2mol/L, then adding the vanadium dioxide nanoparticle dispersion liquid with the same volume into the aniline hydrochloric acid solution, and continuously stirring for 10min to obtain a mixed reaction liquid, wherein the concentration of the vanadium dioxide nanoparticles is 40mg/mL, and the aniline concentration is 0.1 mol/L;
(3) preparing an ammonium persulfate aqueous solution containing hydrochloric acid, wherein the concentration of ammonium persulfate is 0.5mol/L, the concentration of hydrochloric acid is 0.8mol/L, controlling the temperature of the mixed reaction liquid in the step (2) to be 0 ℃, then dropwise adding the ammonium persulfate hydrochloric acid solution according to the molar ratio of ammonium persulfate to aniline of 1:1, continuously stirring for 4 hours after dropwise adding is completed, and performing suction filtration, washing and drying on a product to obtain the polyaniline vanadium dioxide composite material;
(4) dispersing 3g of the polyaniline vanadium dioxide composite material prepared in the step (3) and 3g of nano tin antimony oxide in water to obtain mixed slurry; adding the mixed slurry into 100g of waterborne polyurethane to obtain a mixed resin system;
(5) cleaning the surface of the glass with alcohol, washing with clear water, and drying for later use; and (5) coating the mixed resin system prepared in the step (4) on a glass slide, and curing to form a film to obtain the novel automobile glass light-transmitting heat-insulating film, wherein the thickness of the film is controlled to be 30-40 microns.
Example 3
(1) Weighing 2g of ammonium metavanadate, adding the ammonium metavanadate into 100mL of water, and heating the mixture at 75 ℃ until the ammonium metavanadate is dissolved; then dripping formic acid until the pH value of the system is 3 to obtain a mixed solution; stirring the mixed solution at 220 ℃ for 2d, carrying out suction filtration, washing and drying on the product, and carrying out heat treatment at 450 ℃ for 1.5h to obtain M-phase vanadium dioxide nanoparticles;
(2) dispersing the M-phase vanadium dioxide nano particles prepared in the step (1) in 1.0mol/L hydrochloric acid to obtain 100mg/mL vanadium dioxide nano particle dispersion liquid; mixing 0.04mol of aniline (about 3.64mL) and 100mL of hydrochloric acid with the concentration of 1.0mol/L, stirring for 60min to obtain an aniline hydrochloric acid solution with the concentration of 0.4mol/L, then adding the vanadium dioxide nanoparticle dispersion liquid with the same volume into the aniline hydrochloric acid solution, and continuously stirring for 20min to obtain a mixed reaction liquid, wherein the concentration of the vanadium dioxide nanoparticles is 50mg/mL, and the aniline concentration is 0.2 mol/L;
(3) preparing an ammonium persulfate aqueous solution containing hydrochloric acid, wherein the concentration of ammonium persulfate is 1.0mol/L, the concentration of hydrochloric acid is 1.0mol/L, controlling the temperature of the mixed reaction liquid in the step (2) to be 4 ℃, then dropwise adding the ammonium persulfate hydrochloric acid solution according to the molar ratio of ammonium persulfate to aniline of 1:1, continuously stirring for 2 hours after dropwise adding is finished, and performing suction filtration, washing and drying on a product to obtain the polyaniline vanadium dioxide composite material;
(4) dispersing 5g of the polyaniline vanadium dioxide composite material prepared in the step (3) and 5g of nano tin antimony oxide in water to obtain mixed slurry; adding the mixed slurry into 100g of waterborne polyurethane to obtain a mixed resin system;
(5) cleaning the surface of the glass with alcohol, washing with clear water, and drying for later use; and (5) coating the mixed resin system prepared in the step (4) on a glass slide, and curing to form a film to obtain the novel automobile glass light-transmitting heat-insulating film, wherein the thickness of the film is controlled to be 30-40 microns.
Comparative example 1
(1) Weighing 1.0g of ammonium metavanadate, adding the ammonium metavanadate into 100mL of water, and heating the mixture at 65 ℃ until the ammonium metavanadate is dissolved; then, formic acid is dropwise added until the pH value of the system is 2.0, so as to obtain a mixed solution; stirring the mixed solution at 200 ℃ for 2d, carrying out suction filtration, washing, drying and carrying out heat treatment at 350 ℃ for 2.5h to obtain M-phase vanadium dioxide nanoparticles;
(2) dispersing the M-phase vanadium dioxide nano particles prepared in the step (1) in 1.0mol/L hydrochloric acid to obtain vanadium dioxide nano particle dispersion liquid with the concentration of 90 mg/mL; mixing 0.1mol of aniline (about 9.1mL) and 100mL of hydrochloric acid with the concentration of 1.0mol/L, stirring for 50min to obtain an aniline hydrochloric acid solution with the concentration of 1.0mol/L, then adding the vanadium dioxide nanoparticle dispersion liquid with the same volume into the aniline hydrochloric acid solution, and continuously stirring for 15min to obtain a mixed reaction liquid, wherein the concentration of the vanadium dioxide nanoparticles is 45mg/mL, and the concentration of the aniline is 0.5 mol/L;
(3) preparing an ammonium persulfate aqueous solution containing hydrochloric acid, wherein the concentration of ammonium persulfate is 0.8mol/L, the concentration of hydrochloric acid is 1.0mol/L, controlling the temperature of the mixed reaction liquid in the step (2) to be 0 ℃, then dropwise adding the ammonium persulfate hydrochloric acid solution according to the molar ratio of ammonium persulfate to aniline of 1:1, continuously stirring for 3 hours after dropwise adding is completed, and performing suction filtration, washing and drying on a product to obtain the polyaniline vanadium dioxide composite material;
(4) dispersing 4.8g of the polyaniline vanadium dioxide composite material prepared in the step (3) and 4.0g of nano tin antimony oxide in water to obtain mixed slurry; adding the mixed slurry into 100g of waterborne polyurethane to obtain a mixed resin system;
(5) cleaning the surface of the glass with alcohol, washing with clear water, and drying for later use; and (5) coating the mixed resin system prepared in the step (4) on a glass slide, and curing to form a film to obtain the novel automobile glass light-transmitting heat-insulating film, wherein the thickness of the film is controlled to be 30-40 microns.
Comparative example 2
(1) Weighing 1.0g of ammonium metavanadate, adding the ammonium metavanadate into 100mL of water, and heating the mixture at 65 ℃ until the ammonium metavanadate is dissolved; then, formic acid is dropwise added until the pH value of the system is 2.0, so as to obtain a mixed solution; stirring the mixed solution at 200 ℃ for 2d, carrying out suction filtration, washing, drying and carrying out heat treatment at 350 ℃ for 2.5h to obtain M-phase vanadium dioxide nanoparticles;
(2) dispersing 4.8g of the M-phase vanadium dioxide nano particles prepared in the step (1) and 4.0g of nano tin antimony oxide in water to obtain mixed slurry; adding the mixed slurry into 100g of waterborne polyurethane to obtain a mixed resin system;
(3) cleaning the surface of the glass with alcohol, washing with clear water, and drying for later use; and (3) coating the mixed resin system prepared in the step (2) on a glass slide, and curing to form a film, so as to obtain the novel automobile glass light-transmitting heat-insulating film.
Effects of the embodiment
(1) Hardness testing
The pencil hardness of the thermal barrier film was tested according to GB/T6739-1996.
(2) Acid and alkali corrosion resistance detection
Preparing a heat insulation film on a glass substrate, fully solidifying for 3h at 80 ℃, cooling to room temperature, and putting the heat insulation film into the following solution: 0.15 wt% NaOH solution and 0.15 wt% HCl solution, respectively, were soaked for 24 hours, and then the surface was observed for destruction.
(3) The transmittance of ultraviolet, infrared and visible light is measured by an optical transmittance instrument. The test was carried out with reference to the GB/T2680 method.
(4) Adopt self-control thermal-insulated effect testing arrangement to test the thermal-insulated effect of rete: the size is 150X 145X 75mm3The wall thickness of the wood box is 10mm, the box body is wrapped by a foam plastic heat insulation layer, the thickness is l0mm, the film layer covers the top of the wood box upwards, and a temperature detecting head of a temperature measuring instrument is arranged in the box cavity. The following experiments were carried out under daylight conditions (no film glass, i.e. blank glass as control):
experimental time: in sunny days in July (with sufficient sunlight), the average air temperature is 28.5 ℃, the test is started at eight points in the morning, the temperature is recorded every 1 hour, and the temperature change in the box cavity is recorded.
Experimental time: in sunny days in July (with sufficient sunlight), the average air temperature is 15 ℃, the test is started at eight points in the morning, the temperature is recorded every 1 hour, and the temperature change in the box cavity is recorded.
Table 1 shows the basic performance test results of the heat insulating films prepared in examples 1 to 3 and comparative examples 1 to 2, wherein the heat insulating film prepared in comparative example 2 does not contain polyaniline, has poor corrosion resistance and hardness compared to example 1, and the heat insulating films prepared in examples 1 to 3 and comparative example 1 have good basic performance.
TABLE 1 basic Properties of thermal barrier films
Table 2 shows the optical transmittances of the heat insulating films obtained in examples 1 to 3 and comparative examples 1 to 2, in which comparative example 2 contains no polyaniline and contains a large amount of M-phase vanadium dioxide nanoparticles, and although the ultraviolet absorption rate is the highest, the visible light transmittance is the lowest, while comparative example 1 shows the infrared transmittance is the highest.
TABLE 2 optical transmittance of Heat insulating film
| Examples | Transmittance of visible light | Infrared transmittance | Ultraviolet absorptivity |
| Example 1 | 75.5％ | 42.7％ | 98.4％ |
| Example 2 | 76.0％ | 44.5％ | 98.1％ |
| Example 3 | 75.2％ | 43.9％ | 98.3％ |
| Comparative example 1 | 75.4％ | 48.8％ | 98.5％ |
| Comparative example 2 | 72.3％ | 46.5％ | 99.0％ |
The invention further simulates the heat insulation function of the heat insulation film in the actual environment, as shown in the figure 1 and the figure 2, the heat insulation film prepared in the embodiment 1-3 has better heat insulation function, the internal environment is lower than the comparison temperature in summer, and the internal environment is higher than the comparison group temperature in winter.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A preparation method of a novel light-transmitting and heat-insulating film for automobile glass is characterized by comprising the following steps:
(1) dissolving ammonium metavanadate in water, and then dropwise adding formic acid until the pH value of the system is 2-3 to obtain a mixed solution; stirring the mixed solution at 180-220 ℃ for reaction for 1-3 d, carrying out suction filtration on a product, washing, drying, and carrying out heat treatment at 300-450 ℃ for 1-3 h to obtain vanadium dioxide nanoparticles;
(2) dispersing the vanadium dioxide nano particles prepared in the step (1) in 0.8-1.0 mol/L hydrochloric acid to obtain vanadium dioxide dispersion liquid; mixing aniline and hydrochloric acid with the concentration of 0.8-1.0 mol/L, stirring for 30-60 min, adding the vanadium dioxide dispersion liquid, and continuously stirring for 10-20 min to obtain a mixed reaction liquid;
(3) controlling the temperature of the mixed reaction liquid in the step (2) to be 0-4 ℃, then dropwise adding a hydrochloric acid solution of ammonium persulfate, continuously stirring for 2-4 h after dropwise adding is finished, and performing suction filtration, washing and drying on a product to obtain a polyaniline vanadium dioxide composite material;
(4) dispersing the polyaniline vanadium dioxide composite material prepared in the step (3) and nano tin antimony oxide in water to obtain mixed slurry; and adding the mixed slurry into waterborne polyurethane to obtain a mixed resin system, then coating the mixed resin system on the automobile glass, and curing to form a film to obtain the novel automobile glass light-transmitting heat-insulating film.
2. The preparation method of the novel light-transmitting and heat-insulating film for the automobile glass, which is characterized by comprising the following steps of:
the concentration of the mixed liquid ammonium metavanadate in the step (1) is 1-2 wt%.
3. The preparation method of the novel light-transmitting and heat-insulating film for the automobile glass, which is characterized by comprising the following steps of:
the concentration of the vanadium dioxide nano particles in the mixed system in the step (2) is 40-50 mg/mL.
4. The preparation method of the novel light-transmitting and heat-insulating film for the automobile glass, which is characterized by comprising the following steps of:
the concentration of aniline in the mixed system in the step (2) is 0.1-0.2 mol/L.
5. The preparation method of the novel light-transmitting and heat-insulating film for the automobile glass, which is characterized by comprising the following steps of:
the molar ratio of the ammonium persulfate in the step (3) to the aniline in the step (2) is 1: 1.
6. The preparation method of the novel light-transmitting and heat-insulating film for the automobile glass, which is characterized by comprising the following steps of:
and (4) in the hydrochloric acid solution of ammonium persulfate in the step (3), the concentration of ammonium persulfate is 0.5-1.0 mol/L, and the concentration of hydrochloric acid is 0.8-1.0 mol/L.
7. The preparation method of the novel light-transmitting and heat-insulating film for the automobile glass, which is characterized by comprising the following steps of:
the mass ratio of the polyaniline vanadium dioxide composite material, the nano tin antimony oxide and the waterborne polyurethane in the step (4) is (3-5): (3-5): 100.
8. A novel light-transmitting and heat-insulating film for automobile glass, which is characterized by being prepared by the preparation method of any one of claims 1 to 7.
9. Use of the novel automotive glass light-transmitting and heat-insulating film as claimed in claim 8 in the field of automotive protection.
10. An automotive glass comprising the novel automotive glass light-transmitting heat-insulating film according to claim 8.
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