CN113527968A

CN113527968A - Super-hydrophilic self-cleaning nano coating on glass surface and preparation method thereof

Info

Publication number: CN113527968A
Application number: CN202110849812.3A
Authority: CN
Inventors: 袁琳; 梁立军; 何志伟
Original assignee: Zhejiang Jingzhu Environmental Protection Technology Co ltd
Current assignee: Zhejiang Jingzhu Environmental Protection Technology Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-10-22

Abstract

The invention discloses a super-hydrophilic self-cleaning nano coating on a glass surface and a preparation method thereof, wherein the self-cleaning nano coating comprises the following raw materials in parts by weight: 10-15 parts of titanium dioxide sol, 10-15 parts of silicon dioxide sol, 20-30 parts of aqueous polyurethane solution, 120 parts of acrylic resin emulsion, 30-50 parts of water, 1-3 parts of dimethyl silicone oil, 3-8 parts of glyceryl tristearate, 0.5-2.5 parts of dimethyl sulfoxide and 1-3 parts of sodium dodecyl benzene sulfonate; the intramolecular hydrogen bond of the ultraviolet absorbent and the nitrogen atom on the carbonyl oxygen or triazine ring form a chelate ring, after the ultraviolet absorption, the thermal vibration occurs, the hydrogen bond is broken, the structure is unstable, redundant energy can be released by harmless heat energy for achieving a stable state, and then the hydrogen bond is recovered to the original state, the protective coating is not oxidized by ultraviolet rays, and the self-cleaning capability is good.

Description

Super-hydrophilic self-cleaning nano coating on glass surface and preparation method thereof

Technical Field

The invention relates to the technical field of paint preparation, in particular to a super-hydrophilic self-cleaning nano coating on a glass surface and a preparation method thereof.

Background

The glass curtain wall is a beautiful and novel building wall decoration method and is a remarkable characteristic of the modern high-rise building era. Along with the progress of society and the improvement of the living standard of people in recent years, the glass curtain wall has been widely applied at home and abroad, and the using amount is more and more. However, there is a problem that the stain resistance is poor during the use of the glass curtain wall. The glass curtain wall is smooth and transparent, natural and not pollution-resistant, and particularly in northern areas with high dust content in the atmosphere, serious air pollution, drought and little rain, the glass curtain wall is easy to be dusted and dirty, and has uneven color and different ripples, so that the light reflection is uncontrollable, the light environment is disordered, and the urban landscape is damaged. The glass curtain wall is high in cleaning technical requirement and difficulty, and the environment is easily polluted after a large amount of organic solvent and acidic detergent are used for cleaning, and the discharge of cleaning waste liquid is also difficult. In addition, if the cleaning is carried out frequently, the difficulty and the danger of high-altitude operation are high. Therefore, there is a need for a coated glass having a self-cleaning function.

After the existing self-cleaning nano coating is illuminated for a long time, the aging phenomenon is that cracks appear on the surface of a coating film, and the coating film can fall off seriously, so that the coating cannot achieve the self-cleaning effect.

Disclosure of Invention

The invention aims to provide a super-hydrophilic self-cleaning nano coating on a glass surface and a preparation method thereof.

The technical problems to be solved by the invention are as follows:

The purpose of the invention can be realized by the following technical scheme:

a super-hydrophilic self-cleaning nano coating on a glass surface comprises the following raw materials in parts by weight: 10-15 parts of titanium dioxide sol, 10-15 parts of silicon dioxide sol, 20-30 parts of aqueous polyurethane solution, 120 parts of acrylic resin emulsion, 30-50 parts of water, 1-3 parts of dimethyl silicone oil, 3-8 parts of glyceryl tristearate, 0.5-2.5 parts of dimethyl sulfoxide and 1-3 parts of sodium dodecyl benzene sulfonate;

the super-hydrophilic self-cleaning nano coating is prepared by the following steps:

step S1: adding tetrabutyl titanate and absolute ethyl alcohol into a reaction kettle, stirring and dropwise adding a hydrochloric acid solution and deionized water under the condition that the rotating speed is 300-500min, and continuously stirring for 20-30min to prepare titanium dioxide sol;

step S2: adding tetraethoxysilane into absolute ethyl alcohol, stirring for 15-20min under the condition that the rotating speed is 200-300r/min, adding a hydrochloric acid solution and deionized water, and continuously stirring for 10-15min to prepare silicon dioxide sol;

step S3: mixing titanium dioxide sol, silicon dioxide sol, acrylic resin emulsion, aqueous polyurethane solution, water, dimethyl silicone oil, glyceryl tristearate, dimethyl sulfoxide and sodium dodecyl benzene sulfonate to prepare the super-hydrophilic self-cleaning nano coating.

Further, the molar ratio of the tetra-n-butyl titanate, the absolute ethyl alcohol, the hydrochloric acid solution and the deionized water in the step S1 is 1:4:0.03:4, and the mass fraction of the hydrochloric acid solution is 36%.

Further, the volume ratio of the ethyl orthosilicate, the absolute ethyl alcohol, the hydrochloric acid solution and the deionized water in the step S2 is 2:8:0.3:1, and the mass fraction of the hydrochloric acid solution is 36%.

Further, the ultraviolet absorbent is prepared by the following steps:

step A1: adding cyanuric chloride, chlorobenzene and aluminum trichloride into a reaction kettle, stirring and adding magnesium powder under the conditions of the rotation speed of 150-5 ℃ at 200r/min, stirring for 15-30min, adding resorcinol, reacting for 6-8h to obtain an intermediate 1, adding the intermediate 1, butyl acetate and potassium carbonate into the reaction kettle, stirring and adding methyl chloroacetate under the conditions of the rotation speed of 200-300r/min and the temperature of 70-80 ℃ to react for 5-8h to obtain an intermediate 2;

the reaction process is as follows:

step A2: adding p-methyl phenol, nitrogen-bromosuccinimide, benzoyl peroxide and carbon tetrachloride into a reaction kettle, reacting for 8-10h at the temperature of 80-90 ℃ to obtain an intermediate 3, dissolving the intermediate 3 in ethanol, adding aluminum powder and triphenoxy aluminum, performing reflux heat preservation for 2-3h at the temperature of 150 ℃, adding isobutene, reacting for 3h at the temperature of 130 ℃ to obtain an intermediate 4, adding the intermediate 4, potassium carbonate, deionized water and tetraethylammonium bromide into the reaction kettle, and performing reflux reaction for 2-3h to obtain an intermediate 5;

the reaction process is as follows:

step A3: placing o-nitroaniline, m-aminophenol, sodium nitrite and potassium bisulfate in a mortar, uniformly mixing, grinding for 20-30min at the temperature of 25-30 ℃ to prepare an intermediate 6, adding deionized water and sodium hydroxide into a reaction kettle, stirring and adding the intermediate 6 at the rotation speed of 800r/min at the temperature of 600-80 ℃, adding thiourea dioxide for 10-15min, and reacting for 3-5h at the temperature of 80-90 ℃ after the addition is finished to prepare an intermediate 7;

the reaction process is as follows:

step A4: dissolving the intermediate 2 in acetone, adding the intermediate 5, dibutyltin oxide and o-dichlorobenzene into a reaction kettle, introducing nitrogen for protection, reacting at the rotation speed of 150-.

The reaction process is as follows:

further, the dosage ratio of cyanuric chloride, chlorobenzene, aluminum trichloride, magnesium powder and resorcinol in the step A1 is 0.1mol:100mL:0.1mol:0.8g:0.1mol, and the dosage ratio of the intermediate 1, butyl acetate, potassium carbonate and methyl chloroacetate is 0.05mol:100mL:0.06mol:0.06 mol.

Further, the dosage ratio of the p-methylphenol, the nitrogen-bromosuccinimide, the benzoyl peroxide and the carbon tetrachloride in the step A2 is 0.1mol:0.1mol:0.25g:300mL, the dosage molar ratio of the intermediate 3 to the isobutene is 1:2, the dosage of the aluminum powder is 1% of the mass of the p-methylphenol, the dosage of the triphenoxy aluminum is 0.5% of the mass of the p-methylphenol, and the dosage ratio of the intermediate 4, the potassium carbonate, the deionized water and the tetraethylammonium bromide is 4.5g:9g:80mL:2 mL.

Further, the molar ratio of the dosage of the o-nitroaniline, the m-aminophenol, the sodium nitrite and the potassium bisulfate in the step A3 is 1:1:1:1, and the dosage ratio of the deionized water, the sodium hydroxide, the intermediate 6 and the thiourea dioxide is 150mL:8g:5.5g:10 g.

Further, the intermediate 2, the added intermediate 5, dibutyltin oxide and o-dichlorobenzene in the step A4 are 0.01mol:0.01mol:0.7g:5mL, the molar ratio of the used amounts of the intermediate 8 and the intermediate 7 is 1:1, and the molar ratio of the used amounts of the intermediate 9 and the 2,2,4, 4-tetrahydroxybenzophenone is 2: 1.

A preparation method of a super-hydrophilic self-cleaning nano coating on a glass surface specifically comprises the following steps:

The invention has the beneficial effects that: the invention prepares an ultraviolet absorbent in the process of preparing a super-hydrophilic self-cleaning nano coating on the surface of glass, the ultraviolet absorbent takes cyanuric chloride and resorcinol as raw materials to react to prepare an intermediate 1, the intermediate 1 reacts with methyl chloroacetate to prepare an intermediate 2, then methyl phenol is treated by nitrogen-bromosuccinimide to prepare an intermediate 3, the intermediate 3 reacts with isopropene to prepare an intermediate 4, the intermediate 4 is further treated to prepare an intermediate 5, o-nitroaniline reacts with m-aminophenol to prepare an intermediate 6, the intermediate 6 is further treated to prepare an intermediate 7, the intermediate 2 and the intermediate 5 are subjected to ester exchange reaction to prepare an intermediate 8, the intermediate 8 reacts with the intermediate 7 to prepare an intermediate 9, the intermediates 9 and 2,2,4, 4-tetrahydroxybenzophenone reacts to prepare the ultraviolet absorbent, hydrogen bonds in the molecules of the ultraviolet absorbent and nitrogen atoms on carbonyl oxygen or triazine ring form chelate rings, after ultraviolet rays are absorbed, thermal vibration occurs, the hydrogen bonds are broken, the structure is unstable, redundant energy can be released by harmless heat energy for achieving a stable state, and then the hydrogen bonds are restored to the original state, so that the protective coating is not oxidized by ultraviolet rays, and the ultraviolet absorbent has good self-cleaning capability.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A super-hydrophilic self-cleaning nano coating on a glass surface comprises the following raw materials in parts by weight: 10 parts of titanium dioxide sol, 10 parts of silicon dioxide sol, 20 parts of aqueous polyurethane solution, 100 parts of acrylic resin emulsion, 30 parts of water, 1 part of dimethyl silicone oil, 3 parts of glyceryl tristearate, 0.5 part of dimethyl sulfoxide and 1 part of sodium dodecyl benzene sulfonate;

step S1: adding tetra-n-butyl titanate and absolute ethyl alcohol into a reaction kettle, stirring and dropwise adding a hydrochloric acid solution and deionized water under the condition that the rotating speed is 300min, and continuously stirring for 20min to prepare titanium dioxide sol;

step S2: adding tetraethoxysilane into absolute ethyl alcohol, stirring for 15min under the condition that the rotating speed is 200r/min, adding a hydrochloric acid solution and deionized water, and continuously stirring for 10min to prepare silicon dioxide sol;

The ultraviolet absorbent is prepared by the following steps:

step A1: adding cyanuric chloride, chlorobenzene and aluminum trichloride into a reaction kettle, stirring and adding magnesium powder under the conditions that the rotating speed is 150r/min and the temperature is 3 ℃, adding resorcinol after stirring for 15min, reacting for 6h to obtain an intermediate 1, adding the intermediate 1, butyl acetate and potassium carbonate into the reaction kettle, stirring and adding methyl chloroacetate under the conditions that the rotating speed is 200r/min and the temperature is 70 ℃, and reacting for 5h to obtain an intermediate 2;

step A2: adding p-methylphenol, nitrogen-bromosuccinimide, benzoyl peroxide and carbon tetrachloride into a reaction kettle, reacting for 8 hours at the temperature of 80 ℃ to obtain an intermediate 3, dissolving the intermediate 3 into ethanol, adding aluminum powder and triphenoxy aluminum, performing reflux heat preservation for 2 hours at the temperature of 150 ℃, adding isobutene, reacting for 3 hours at the temperature of 130 ℃ to obtain an intermediate 4, adding the intermediate 4, potassium carbonate, deionized water and tetraethylammonium bromide into the reaction kettle, and performing reflux reaction for 2 hours to obtain an intermediate 5;

step A3: placing o-nitroaniline, m-aminophenol, sodium nitrite and potassium bisulfate in a mortar, uniformly mixing, grinding for 20min at the temperature of 25 ℃ to prepare an intermediate 6, adding deionized water and sodium hydroxide into a reaction kettle, stirring and adding the intermediate 6 at the rotation speed of 600r/min, adding thiourea dioxide at the temperature of 70 ℃ for 10min, and reacting for 3h at the temperature of 80 ℃ to prepare an intermediate 7;

step A4: dissolving the intermediate 2 in acetone, adding the intermediate 5, dibutyltin oxide and o-dichlorobenzene into a reaction kettle, introducing nitrogen for protection, reacting at 150 ℃ at the rotation speed of 150r/min for 6 hours, decoloring with activated carbon, recrystallizing with N, N-dimethylformamide to obtain an intermediate 8, dissolving the intermediate 8 in acetone, adding the intermediate 7, reacting at 40 ℃ for 5 hours to obtain an intermediate 9, adding the intermediate 9, 2,4, 4-tetrahydroxybenzophenone and acetone into the reaction kettle, performing reflux reaction at 80 ℃ for 3 hours, and distilling to remove acetone to obtain the ultraviolet absorbent.

Example 2

A super-hydrophilic self-cleaning nano coating on a glass surface comprises the following raw materials in parts by weight: 13 parts of titanium dioxide sol, 13 parts of silicon dioxide sol, 25 parts of aqueous polyurethane solution, 110 parts of acrylic resin emulsion, 40 parts of water, 2 parts of dimethyl silicone oil, 5 parts of glyceryl tristearate, 1.5 parts of dimethyl sulfoxide and 2 parts of sodium dodecyl benzene sulfonate;

step S1: adding tetra-n-butyl titanate and absolute ethyl alcohol into a reaction kettle, stirring and dropwise adding a hydrochloric acid solution and deionized water under the condition that the rotating speed is 300min, and continuously stirring for 30min to prepare titanium dioxide sol;

step S2: adding tetraethoxysilane into absolute ethyl alcohol, stirring for 20min under the condition that the rotating speed is 200r/min, adding a hydrochloric acid solution and deionized water, and continuously stirring for 10min to prepare silicon dioxide sol;

The ultraviolet absorbent is prepared by the following steps:

step A1: adding cyanuric chloride, chlorobenzene and aluminum trichloride into a reaction kettle, stirring and adding magnesium powder under the conditions of the rotating speed of 200r/min and the temperature of 3 ℃, adding resorcinol after stirring for 30min, reacting for 6h to obtain an intermediate 1, adding the intermediate 1, butyl acetate and potassium carbonate into the reaction kettle, stirring and adding methyl chloroacetate under the conditions of the rotating speed of 300r/min and the temperature of 70 ℃, and reacting for 8h to obtain an intermediate 2;

step A2: adding p-methylphenol, nitrogen-bromosuccinimide, benzoyl peroxide and carbon tetrachloride into a reaction kettle, reacting for 10 hours at the temperature of 80 ℃ to obtain an intermediate 3, dissolving the intermediate 3 into ethanol, adding aluminum powder and triphenoxy aluminum, performing reflux heat preservation for 2 hours at the temperature of 150 ℃, adding isobutene, reacting for 3 hours at the temperature of 130 ℃ to obtain an intermediate 4, adding the intermediate 4, potassium carbonate, deionized water and tetraethylammonium bromide into the reaction kettle, and performing reflux reaction for 3 hours to obtain an intermediate 5;

step A3: placing o-nitroaniline, m-aminophenol, sodium nitrite and potassium bisulfate in a mortar, uniformly mixing, grinding for 30min at the temperature of 25 ℃ to prepare an intermediate 6, adding deionized water and sodium hydroxide into a reaction kettle, stirring and adding the intermediate 6 at the rotation speed of 600r/min, adding thiourea dioxide at the temperature of 80 ℃ for 10min, and reacting for 3h at the temperature of 90 ℃ to prepare an intermediate 7;

step A4: dissolving the intermediate 2 in acetone, adding the intermediate 5, dibutyltin oxide and o-dichlorobenzene into a reaction kettle, introducing nitrogen for protection, reacting at 150 ℃ at the rotation speed of 200r/min for 10 hours, decoloring with activated carbon, recrystallizing with N, N-dimethylformamide to obtain an intermediate 8, dissolving the intermediate 8 in acetone, adding the intermediate 7, reacting at 40 ℃ for 7 hours to obtain an intermediate 9, adding the intermediate 9, 2,4, 4-tetrahydroxybenzophenone and acetone into the reaction kettle, refluxing at 80 ℃ for 5 hours, and distilling to remove acetone to obtain the ultraviolet absorbent.

Example 3

A super-hydrophilic self-cleaning nano coating on a glass surface comprises the following raw materials in parts by weight: 15 parts of titanium dioxide sol, 15 parts of silicon dioxide sol, 30 parts of aqueous polyurethane solution, 120 parts of acrylic resin emulsion, 50 parts of water, 3 parts of dimethyl silicone oil, 8 parts of glyceryl tristearate, 2.5 parts of dimethyl sulfoxide and 3 parts of sodium dodecyl benzene sulfonate;

step S1: adding tetra-n-butyl titanate and absolute ethyl alcohol into a reaction kettle, stirring and dropwise adding a hydrochloric acid solution and deionized water under the condition that the rotating speed is 500min, and continuously stirring for 30min to prepare titanium dioxide sol;

step S2: adding tetraethoxysilane into absolute ethyl alcohol, stirring for 20min under the condition that the rotating speed is 300r/min, adding a hydrochloric acid solution and deionized water, and continuing stirring for 15min to prepare silicon dioxide sol;

The ultraviolet absorbent is prepared by the following steps:

step A1: adding cyanuric chloride, chlorobenzene and aluminum trichloride into a reaction kettle, stirring and adding magnesium powder under the conditions of the rotating speed of 200r/min and the temperature of 5 ℃, stirring for 30min, adding resorcinol, reacting for 8h to obtain an intermediate 1, adding the intermediate 1, butyl acetate and potassium carbonate into the reaction kettle, stirring and adding methyl chloroacetate under the conditions of the rotating speed of 300r/min and the temperature of 80 ℃, and reacting for 8h to obtain an intermediate 2;

step A2: adding p-methylphenol, nitrogen-bromosuccinimide, benzoyl peroxide and carbon tetrachloride into a reaction kettle, reacting for 10 hours at the temperature of 90 ℃ to obtain an intermediate 3, dissolving the intermediate 3 into ethanol, adding aluminum powder and triphenoxy aluminum, performing reflux heat preservation for 2-3 hours at the temperature of 150 ℃, adding isobutene, reacting for 3 hours at the temperature of 130 ℃ to obtain an intermediate 4, adding the intermediate 4, potassium carbonate, deionized water and tetraethylammonium bromide into the reaction kettle, and performing reflux reaction for 3 hours to obtain an intermediate 5;

step A3: placing o-nitroaniline, m-aminophenol, sodium nitrite and potassium bisulfate in a mortar, uniformly mixing, grinding for 30min at the temperature of 30 ℃ to prepare an intermediate 6, adding deionized water and sodium hydroxide into a reaction kettle, stirring and adding the intermediate 6 at the rotation speed of 800r/min, adding thiourea dioxide at the temperature of 80 ℃ for 15min, and reacting for 5h at the temperature of 90 ℃ to prepare an intermediate 7;

step A4: dissolving the intermediate 2 in acetone, adding the intermediate 5, dibutyltin oxide and o-dichlorobenzene into a reaction kettle, introducing nitrogen for protection, reacting at 160 ℃ at the rotation speed of 200r/min for 10 hours, decoloring with activated carbon, recrystallizing with N, N-dimethylformamide to obtain an intermediate 8, dissolving the intermediate 8 in acetone, adding the intermediate 7, reacting at 50 ℃ for 7 hours to obtain an intermediate 9, adding the intermediate 9, 2,4, 4-tetrahydroxybenzophenone and acetone into the reaction kettle, performing reflux reaction at 90 ℃ for 5 hours, and distilling to remove acetone to obtain the ultraviolet absorbent.

Comparative example 1

This comparative example compared to example 1 using 2,2,4, 4-tetrahydroxybenzophenone instead of the UV absorber, the same procedure was followed.

Comparative example 2

This comparative example compares with example 1 without adding an ultraviolet absorber, and the rest of the procedure is the same.

The self-cleaning nano-coating prepared in examples 1-3 and comparative examples 1-2 were subjected to performance tests, and the test results are shown in table 1 below;

the nano-coating prepared in examples 1-3 and comparative examples 1-2 was applied to an iron plate at a wavelength of 340nm and an irradiation intensity of 0.68W/m²And illuminating for 200, 300 and 500 hours, and observing the change of the coating.

TABLE 1

As shown in the above Table 1, the nano-coating prepared in the examples 1-3 has no cracking after 500h of photo-aging, while the nano-coating prepared in the comparative examples 1-2 has large-scale cracking after 500h of photo-aging, which shows that the invention has good anti-UV aging effect.

The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.

Claims

1. The super-hydrophilic self-cleaning nano coating on the surface of glass is characterized in that: the feed comprises the following raw materials in parts by weight: 10-15 parts of titanium dioxide sol, 10-15 parts of silicon dioxide sol, 20-30 parts of aqueous polyurethane solution, 120 parts of acrylic resin emulsion, 30-50 parts of water, 1-3 parts of dimethyl silicone oil, 3-8 parts of glyceryl tristearate, 0.5-2.5 parts of dimethyl sulfoxide and 1-3 parts of sodium dodecyl benzene sulfonate;

2. The super-hydrophilic self-cleaning nano coating for the glass surface as claimed in claim 1, wherein: the molar ratio of the tetra-n-butyl titanate, the absolute ethyl alcohol, the hydrochloric acid solution and the deionized water in the step S1 is 1:4:0.03:4, and the mass fraction of the hydrochloric acid solution is 36%.

3. The super-hydrophilic self-cleaning nano coating for the glass surface as claimed in claim 1, wherein: the volume ratio of the ethyl orthosilicate, the absolute ethyl alcohol, the hydrochloric acid solution and the deionized water in the step S2 is 2:8:0.3:1, and the mass fraction of the hydrochloric acid solution is 36%.

4. The super-hydrophilic self-cleaning nano coating for the glass surface as claimed in claim 1, wherein: the ultraviolet absorbent is prepared by the following steps:

5. The super-hydrophilic self-cleaning nano-coating for glass surfaces as claimed in claim 4, wherein: the dosage ratio of cyanuric chloride, chlorobenzene, aluminum trichloride, magnesium powder and resorcinol in the step A1 is 0.1mol:100mL:0.1mol:0.8g:0.1mol, and the dosage ratio of the intermediate 1, butyl acetate, potassium carbonate and methyl chloroacetate is 0.05mol:100mL:0.06mol:0.06 mol.

6. The super-hydrophilic self-cleaning nano-coating for glass surfaces as claimed in claim 4, wherein: the dosage ratio of the p-methylphenol, the nitrogen-bromosuccinimide, the benzoyl peroxide and the carbon tetrachloride in the step A2 is 0.1mol:0.1mol:0.25g:300mL, the dosage molar ratio of the intermediate 3 to the isobutene is 1:2, the dosage of the aluminum powder is 1% of the mass of the p-methylphenol, the dosage of the triphenoxy aluminum is 0.5% of the mass of the p-methylphenol, and the dosage ratio of the intermediate 4, the potassium carbonate, the deionized water and the tetraethylammonium bromide is 4.5g:9g:80mL:2 mL.

7. The super-hydrophilic self-cleaning nano-coating for glass surfaces as claimed in claim 4, wherein: the molar ratio of the dosage of the o-nitroaniline, the m-aminophenol, the sodium nitrite and the potassium bisulfate in the step A3 is 1:1:1:1, and the dosage of the deionized water, the sodium hydroxide, the intermediate 6 and the thiourea dioxide is 150mL, 8g, 5.5g and 10 g.

8. The super-hydrophilic self-cleaning nano-coating for glass surfaces as claimed in claim 4, wherein: adding the intermediate 2, the intermediate 5, dibutyltin oxide and o-dichlorobenzene in the step A4, wherein the molar ratio of the added intermediate 5 to the added dibutyltin oxide to the added o-dichlorobenzene in the step A is 0.01mol:0.01mol:0.7g:5mL, the molar ratio of the added intermediate 8 to the added intermediate 7 is 1:1, and the molar ratio of the added intermediate 9 to the added 2,2,4, 4-tetrahydroxybenzophenone in the added intermediate 7 to the added 2.

9. The method for preparing the super-hydrophilic self-cleaning nano coating on the glass surface according to claim 1, wherein the method comprises the following steps: the method specifically comprises the following steps: