Superhydrophilic anti-fog coating, method of making and use thereof

Abstract

The application discloses a super-hydrophilic anti-fog coating, and a preparation method and application thereof.The super-hydrophilic anti-fog coating is prepared by mixing 50 parts of A solution and 50 parts of B solution, adjusting the pH value to 4-5 by adding AMP95, and adding 0.1-0.5 parts of dodecyl dihydroxyethyl betaine.The super-hydrophilic anti-fog coating has the advantages of long service life and certain stain decomposition capacity compared with the prior art.

Description

Technical Field

[0001] The invention relates to a coating which is applied on glass to prevent fogging. The invention also discloses a preparation method and application of the coating. Background Art

[0002] Anti-fog coating is a special coating applied to transparent surfaces. Its primary function is to prevent water vapor from forming fog on the surface, thereby maintaining clear visibility. Anti-fog coating has been widely used and developed. In the automotive field, anti-fog coating is applied to car windows and rearview mirrors to provide better driving visibility. In the architectural field, anti-fog coating is used on glass curtain walls and windows to provide better vision and comfort. In the kitchen and bathroom industry, anti-fog coating is widely used on tiles, glass, mirrors, etc. to provide a better bathing experience. In addition, anti-fog coating is also used on products such as glasses and camera lenses to provide a better user experience.

[0003] The working principles of anti-fog coatings can be summarized into two aspects: surface tension regulation and water vapor adsorption. Anti-fog coatings reduce the formation of fog on the surface by regulating surface tension. Normally, water molecules form a thin liquid film on the surface, which causes light scattering and thus produces fog.

[0004] Currently, there are two mechanisms for anti-fog materials. One is super-hydrophobic anti-fog coatings. This coating, with its strong non-stick properties, effectively prevents water molecules from accumulating on the surface, thereby achieving an anti-fog effect. However, this coating requires extremely high hydrophobicity and is extremely expensive to produce, making it difficult to apply on a large scale. The other is super-hydrophilic anti-fog coatings. Special chemicals in the coating change the surface tension of the liquid film, making it smoother and reducing light scattering, thereby reducing fog and preventing water vapor from accumulating on the surface, thereby maintaining surface clarity.

[0005] At present, the main problems of super hydrophilic anti-fog coating are performance, water vapor resistance, and longer service life, which can be attributed to the following points:

[0006] First, some super-hydrophilic anti-fog coatings have a certain alkalinity, and after long-term use, carbonate crystals will form on the surface, affecting the appearance and service life.

[0007] Second, the super-hydrophilic anti-fog coating has a poor lifespan in resisting water vapor. Since the hydrophilicity of the material must be fully considered during the material design process, more hydrophilic materials or chemical groups (sodium, potassium ions, amino groups, sulfonic acid groups, hydroxyl groups, and carboxyl groups) are added. However, these small molecules are more likely to produce water-soluble, amino groups, sulfonic acid groups, and carboxyl groups are more active, and various reactions occur in the transaction, which greatly reduces their own hydrophilicity. The hydroxyl group has a certain degree of self-inertness and is more likely to produce hydrogen bonds with other polar organic groups, thereby greatly reducing its own hydrophilicity.

[0008] Third, super-hydrophilic anti-fog materials are not only for water fog and water vapor environment, but also for dust and oily substances, which can cause a large range of surface anti-fog performance decline. SUMMARY

[0009] The first technical problem to be solved by the present application is to provide a super-hydrophilic anti-fog coating with long service life and surface stain decomposition ability.

[0010] The second technical problem to be solved by the present application is to provide a preparation method of a super-hydrophilic anti-fog coating with long service life and surface stain decomposition ability.

[0011] The third technical problem to be solved by the present application is to provide an application of a super-hydrophilic anti-fog coating with long service life and surface stain decomposition ability.

[0012] The technical solution adopted by the present application to solve the first technical problem is a super-hydrophilic anti-fog coating, characterized in that the super-hydrophilic anti-fog coating is obtained by mixing 50 parts by weight of A solution and 50 parts by weight of B solution, adjusting the pH value to 4-5 by adding AMP95, and adding 0.1-0.5 parts by weight of dodecyl dihydroxyethyl betaine.

[0013] Chlorinated (2-aminoethyl) trimethyl ammonium hydrochloride 2-5 parts;

[0014] (3-glycidylpropoxy) trimethoxysilane 3-8 parts;

[0015] Water 90-120 parts;

[0016] The aforementioned B solution includes the following components and their weight ratios:

[0017]

[0018] The solid content of the aforementioned acid silicon sol is 20%-25% w.

[0019] As a preferred, the A solution includes the following components and their weight ratios:

[0020] Chlorinated (2-aminoethyl) trimethyl ammonium hydrochloride 2.8-5 parts;

[0021] (3-glycidylpropoxy) trimethoxysilane 4-6 parts;

[0022] Water 90-110 parts;

[0023] The B solution comprises the following components and their weight ratios:

[0024]

[0025]

[0026] Preferably, the acidic silica sol has a particle size of 5-10 nm.

[0027] The technical solution adopted by the present application to solve the second technical problem is a preparation method of super-hydrophilic anti-fog coating, characterized by comprising the following steps:

[0028] ①Take water and add (2-aminoethyl) trimethylammonium chloride hydrochloride and (3-glycidylpropoxy) trimethoxysilane to the water, stir and heat to 35-45℃, continue to stir to obtain solution A;

[0029] ②Take water and add acetic acid, tetraethyl orthosilicate, acidic silica sol, nano titanium oxide and polyethylene glycol trimethoxysilane propyl ether to the water under stirring to obtain solution B;

[0030] ③Mix solution A and solution B thoroughly, add AMP95 to adjust the pH value to 4-5, add dodecyl dihydroxyethyl betaine, stir, and then perform ultrasonic homogenization to obtain the super-hydrophilic anti-fog coating.

[0031] The technical solution adopted by the present application to solve the third technical problem is the application of the super-hydrophilic anti-fog coating on glass.

[0032] Further, the method comprises the following steps:

[0033] Pour the cleaning solution into an ultrasonic cleaning machine, put a piece of glass into the machine, perform ultrasonic cleaning, take out and dry, then put into a plasma cleaning machine to perform cleaning, take out and obtain the glass for use; the ultrasonic cleaning of the glass can remove surface stains, and the plasma activation can increase the surface hydroxyl groups and increase the adhesion of the material;

[0034] Add the super-hydrophilic anti-fog coating into a spray gun, spray onto the surface of the glass, and dry to obtain the super-hydrophilic anti-fog glass with organic and inorganic properties.

[0035] Preferably, after thorough mixing, the following is obtained: 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate.

[0036] Add the super-hydrophilic anti-fog coating into a spray gun, spray onto the surface of the glass, and dry to obtain the super-hydrophilic anti-fog glass with organic and inorganic properties.

[0037] Compared with the prior art, the present application has the following advantages:

[0038] The chloro(2-aminoethyl)trimethylammonium hydrochloride adjusts the pH value to about 2 after being dissolved in water. Such pH value is conducive to the hydrolysis of (3-glycidylpropoxy)trimethoxysilane and no extensive gelation polymerization phenomenon occurs after hydrolysis. The amino group reacts with the epoxy group at 35°C to form a firm chemical bond. In this way, the chloro(2-aminoethyl)trimethylammonium is well combined with the silane coupling agent and reacts. The trimethylamine ion has strong hydrophilicity and strong stability in strong acid and strong base, which can make the material have better service life.

[0039] The addition of acetic acid can keep tetraethyl orthosilicate and polyethylene glycol trimethoxysilyl propyl ether in solution B well hydrolyzed and stable, and no extensive condensation gelation behavior occurs. The silicon hydroxyl formed after the hydrolysis of polyethylene glycol trimethoxysilyl propyl ether condenses with the hydroxyl on tetraethyl orthosilicate, silica sol, and titanium oxide to form a mixed oligomer. The polyethylene glycol group it carries has a certain steric hindrance effect and can act as a dispersant to prevent agglomeration problems. Thus, the material has better transparency and smoother surface after drying.

[0040] The addition of dodecyl dihydroxyethyl betaine can have an excellent leveling and wetting effect. It can reduce surface defect problems during spraying, such as material sagging, shrinkage, and uneven surface.

[0041] By introducing the trimethylammonium ion with excellent hydrophilicity and stability, the material has excellent hydrophilicity and excellent stability after being obtained. The overall coating is weakly acidic and does not react with acidic gases (CO2) in the air to form carbonates, thereby causing the problem of back alkaline. The introduction of polyethylene glycol trimethoxysilyl propyl ether greatly reduces the agglomeration problem of the material, so that the coating can remain stable for a long time and does not produce white protrusions after drying. The addition of nano titanium oxide in the material gives the material certain photocatalytic properties, making it have certain surface stain decomposition ability. Further, it has a longer service life. The overall coating is water-based solvent, which is more environmentally friendly and efficient. DETAILED DESCRIPTION

[0042] The application is further described in detail below in conjunction with examples.

[0043] Example 1:

[0044] Step one:

[0045] Take 92 parts of water and add 4 parts of chloro(2-aminoethyl)trimethylammonium hydrochloride (CAS: 3399-67-5) to it, 4 parts of (3-glycidylpropoxy)trimethoxysilane (CAS: 2530-83-8), stir well (500 r / min), and heat to 35°C, stir for 1 h, to obtain solution A.

[0046] Step two:

[0047] Take 43 parts of water, add 1 part of acetic acid, 2 parts of tetraethyl orthosilicate, 40 parts of acidic silica sol (solid content 20% wt, 5-10 nm), 1 part of nano titanium oxide (5 nm), 1 part of polyethylene glycol trimethoxysilane propyl ether (CAS: 98358-37-3), stir well for 1 h to obtain solution B.

[0048] Step three:

[0049] Take 50 parts of solution A and 50 parts of solution B, mix well (500 r / min), add a small amount of AMP95 (2-amino-2-methyl-1-propanol) to adjust the pH value of the plate to 4.5. Add 0.2 parts of dodecyl dihydroxyethyl betaine, stir for 1 h, and then use an ultrasonic homogenizer to perform ultrasonic homogenization (100 ml 450W 30S) to obtain a coating.

[0050] Step four:

[0051] Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate, stir well, then pour into an ultrasonic cleaner, put a piece of glass, ultrasonic cleaning for 20 min, take out and dry with absorbent cotton, then put into a plasma cleaning machine for cleaning for 120S, take out and get the glass cleaned by the plasma cleaning machine.

[0052] Step five:

[0053] Put the coating into the spray gun and spray it onto the surface of the glass. After the surface is dry, dry it at 60°C for 1 h. Get a machine inorganic super-hydrophilic anti-fog glass.

[0054] Example 2

[0055] Step one:

[0056] Take 92 parts of water, add 2 parts of (2-aminoethyl) trimethylammonium chloride hydrochloride (CAS: 3399-67-5), add 3 parts of (3-glycidylpropoxy) trimethoxysilane (CAS: 2530-83-8), stir well (500 r / min), and heat to 35°C, stir for 1 h to obtain solution A.

[0057] Step two:

[0058] Take 43 parts of water, under the condition of stirring (500 r / min) add 0.5 parts of acetic acid, 1 part of ethyl orthosilicate, 35 parts of acid silica sol (solid content 20% wt, 5-10 nm), 0.6 parts of nano titanium oxide (5 nm), 0.5-1.5 parts of polyethylene glycol trimethoxysilane propyl ether (CAS: 98358-37-3), stir well for 1 h, to obtain solution B.

[0059] Step three:

[0060] Take 50 parts of solution A and 50 parts of solution B to mix well (500 r / min), add a small amount of AMP95 (2-amino-2-methyl-1-propanol) to adjust the pH value to 4.5. Add 0.1 parts of dodecyl dihydroxyethyl betaine, stir for 1 h, and then use an ultrasonic homogenizer to perform ultrasonic homogenization (100 ml 450W 30S), to obtain a coating.

[0061] Step four:

[0062] Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate, stir well, then pour into an ultrasonic cleaner, put a piece of glass, ultrasonic cleaning for 20 min, take out and wipe dry with absorbent cotton, then put into a plasma cleaner for cleaning for 120S, take out and get the glass cleaned by the plasma cleaner.

[0063] Step five:

[0064] Put the coating into the spray gun and spray it onto the surface of the glass. After the surface is dry, dry it at 60°C for 1 h. Get a super-hydrophilic anti-fog glass with organic and inorganic substances.

[0065] Example 3

[0066] Step one:

[0067] Take 92 parts of water, add 5 parts of (2-aminoethyl) trimethylammonium chloride hydrochloride (CAS: 3399-67-5), add 8 parts of (3-glycidylpropoxy) trimethoxysilane (CAS: 2530-83-8), stir well (500 r / min), and heat to 35°C, stir for 1 h, to obtain solution A.

[0068] Step two:

[0069] Take 43 parts of water, under the condition of stirring (500 r / min) add 2 parts of acetic acid, 3.5 parts of ethyl orthosilicate, 55 parts of acid silica sol (solid content 20% wt, 5-10 nm), 2 parts of nano titanium oxide (5 nm), 1.5 parts of polyethylene glycol trimethoxysilane propyl ether (CAS: 98358-37-3), stir well for 1 h, to obtain solution B.

[0070] Step three:

[0071] Take 50 parts of solution A and 50 parts of solution B to mix thoroughly (500 r / min), add a small amount of AMP95 (2-amino-2-methyl-1-propanol) to adjust the pH value to 4.5. Add 0.5 parts of dodecyl dihydroxyethyl betaine, stir for 1 h, and then use an ultrasonic homogenizer to ultrasonic homogenize (100 ml 450W 30S) to obtain the coating.

[0072] Step four:

[0073] Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate, stir thoroughly, pour into an ultrasonic cleaner, put a piece of glass, ultrasonic clean for 20 min, take out and wipe dry with absorbent cotton, then put into a plasma cleaner and clean for 120S, take out and get the glass cleaned by the plasma cleaner.

[0074] Step five:

[0075] Add the coating to the spray gun and spray it onto the surface of the glass. After the surface is dry, dry it at 60°C for 1 h. Get the organic-inorganic super-hydrophilic anti-fog glass.

[0076] Comparative example 1:

[0077] Step one:

[0078] Take 92 parts of water and add 4 parts of (2-aminoethyl) trimethylammonium chloride hydrochloride (CAS: 3399-67-5) to it, add 4 parts of (3-glycidylpropoxy) trimethoxysilane (CAS: 2530-83-8), stir thoroughly (500 r / min), and heat to 35°C, stir for 1 h, to obtain solution A.

[0079] Step two:

[0080] Take 43 parts of water and add 1 part of acetic acid, 2 parts of tetraethyl orthosilicate, 40 parts of acid silica sol (solid content 20% wt, 5-10 nm), and 1 part of polyethylene glycol trimethoxysilane propyl ether (CAS: 98358-37-3) under stirring (500 r / min), stir thoroughly for 1 h to obtain solution B.

[0081] Step three:

[0082] Take 50 parts of solution A and 50 parts of solution B to mix thoroughly (500 r / min), add a small amount of AMP95 (2-amino-2-methyl-1-propanol) to adjust the pH value to 4.5. Add 0.2 parts of dodecyl dihydroxyethyl betaine, stir for 1 h, and then use an ultrasonic homogenizer to ultrasonic homogenize (100 ml 450W 30S) to obtain the coating.

[0083] Step four:

[0084] Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, 1 part of sodium dodecyl sulfate after stirring well into the ultrasonic cleaning machine, put a piece of glass, ultrasonic cleaning 20 min, take out and dry with absorbent cotton, then put into the plasma cleaning machine cleaning 120S, take out and get the glass after plasma cleaning machine cleaning.

[0085] Step five:

[0086] The paint is added to the spray gun, sprayed to the surface of the glass, and dried at 60°C for 1 h. The organic-inorganic super-hydrophilic anti-fog glass is obtained.

[0087] Comparative example 2:

[0088] Step one:

[0089] Take 92 parts of water, add 4 parts of (2-aminoethyl) trimethylammonium chloride hydrochloride (CAS: 3399-67-5), add 4 parts of (3-glycidylpropoxy) trimethoxysilane (CAS: 2530-83-8), stir well (500 r / min), and heat to 35°C, stir for 1 h, to obtain solution A.

[0090] Step two:

[0091] Take 43 parts of water, add 1 part of acetic acid, 2 parts of tetraethyl orthosilicate, 40 parts of acid silica sol (solid content 20% wt, 5-10 nm), 1 part of nano titanium oxide (5 nm) under stirring (500 r / min), stir well for 1 h, to obtain solution B.

[0092] Step three:

[0093] Take 50 parts of solution A and 50 parts of solution B, mix well (500 r / min), add a small amount of AMP95 (2-amino-2-methyl-1-propanol) to adjust the pH value to 4.5. Add 0.2 parts of dodecyl dihydroxyethyl betaine, stir for 1 h, then use an ultrasonic homogenizer to perform ultrasonic homogenization (100 ml 450W 30S), to obtain the coating.

[0094] Step four:

[0095] Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, 1 part of sodium dodecyl sulfate after stirring well into the ultrasonic cleaning machine, put a piece of glass, ultrasonic cleaning 20 min, take out and dry with absorbent cotton, then put into the plasma cleaning machine cleaning 120S, take out and get the glass after plasma cleaning machine cleaning.

[0096] Step five:

[0097] The paint is added to the spray gun, sprayed to the surface of the glass, and dried at 60°C for 1 h. The organic-inorganic super-hydrophilic anti-fog glass is obtained.

[0098] Comparative Example 3

[0099] Step one:

[0100] Take 92 parts of water, add 4 parts of (2-aminoethyl) trimethylammonium chloride hydrochloride (CAS: 3399-67-5) to it, stir well (500 r / min), and heat to 35°C, stir for 1 h, to obtain solution A.

[0101] Step two:

[0102] Take 43 parts of water, add 1 part of acetic acid, 2 parts of tetraethyl orthosilicate, 40 parts of acidic silica sol (solid content 20% wt, 5-10 nm), 1 part of nano titanium oxide (5 nm), 1 part of polyethylene glycol trimethoxysilane propyl ether (CAS: 98358-37-3) under stirring (500 r / min), stir well for 1 h, to obtain solution B.

[0103] Step three:

[0104] Take 50 parts of solution A and 50 parts of solution B, mix well (500 r / min), add a small amount of AMP95 (2-amino-2-methyl-1-propanol) to adjust the pH value to 4.5. Add 0.2 parts of dodecyl dihydroxyethyl betaine, stir for 1 h, and then use an ultrasonic homogenizer to perform ultrasonic homogenization (100 ml 450W 30S), to obtain a coating.

[0105] Step four:

[0106] Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate, stir well, pour into an ultrasonic cleaner, put a piece of glass, ultrasonic clean for 20 min, take out and wipe dry with absorbent cotton, then put into a plasma cleaner for cleaning for 120S, take out and obtain the glass cleaned by the plasma cleaner.

[0107] Step five:

[0108] Put the coating into a spray gun, spray it onto the surface of the glass, and dry at 60°C for 1 h after surface drying. Obtain a machine-inorganic super-hydrophilic anti-fog glass.

[0109] Comparative Example 4

[0110] Step one:

[0111] Take 92 parts of water, add 4 parts of (3-glycidylpropoxy) trimethoxysilane (CAS: 2530-83-8) to it, stir well (500 r / min), and heat to 35°C, stir for 1 h, to obtain solution A.

[0112] Step two:

[0113] Take 43 parts of water, under stirring (500 r / min) add 1 part of acetic acid, 2 parts of tetraethyl orthosilicate, 40 parts of acidic silica sol (solid content 20% wt, 5-10 nm), 1 part of nano titanium oxide (5 nm), 1 part of polyethylene glycol trimethoxysilane propyl ether (CAS: 98358-37-3), stir well for 1 h to obtain solution B.

[0114] Step three:

[0115] Take 50 parts of solution A and 50 parts of solution B to mix well (500 r / min), add a small amount of AMP95 (2-amino-2-methyl-1-propanol) to adjust the pH value to 4.5. Add 0.2 parts of dodecyl dihydroxyethyl betaine, stir for 1 h, and then use an ultrasonic homogenizer to perform ultrasonic homogenization (100 ml 450W 30S) to obtain a coating.

[0116] Step four:

[0117] Take 20 parts of water, 2 parts of hydrogen peroxide, 5 parts of ethanol, and 1 part of sodium dodecyl sulfate, stir well, then pour into an ultrasonic cleaner, put a piece of glass, ultrasonic clean for 20 min, take out and wipe dry with absorbent cotton, then put into a plasma cleaner and clean for 120S, take out and get the glass cleaned by the plasma cleaner.

[0118] Step five:

[0119] Put the coating into a spray gun and spray it onto the surface of the glass. After the surface is dry, dry it at 60°C for 1 h. Obtain a material with organic and inorganic superhydrophobic anti-fog glass.

[0120] Table 1 Test results of each example and comparative example

[0121]

[0122] Test description:

[0123] In examples 1 to 3, good hydrophilicity, good acid and alkali resistance, and good stability of the material in outdoor tests are obtained.

[0124] Comparing comparative example 1 and comparative example 2, we can find that the addition of titanium oxide can increase the oil decomposition ability of the material in outdoor, which is meaningful for improving the hydrophilic angle. And with the addition of titanium oxide, the hardness of the coating also increases to some extent.

[0125] Comparing comparative example 1 and comparative example 2, we can find that if polyethylene glycol trimethoxysilane propyl ether is not added, the coating will be rough and white after drying, and the whole material structure will become loose. The performance will be greatly reduced.

[0126] Comparative Example 1 and Comparative Example 2 can find that if the anchor of (3-glycidylpropoxy)trimethoxysilane to chlorinated (2-aminoethyl)trimethylammonium hydrochloride is absent, the hydrophilic angle will decrease significantly in a short time after contacting water.

[0127] Comparative Example 1 and Comparative Example 2 will have a significant increase in the hydrophilic angle if the chlorinated (2-aminoethyl)trimethylammonium hydrochloride material is not added, and cannot provide strong anti-fogging performance.

[0128] Test method:

[0129] The method for acid resistance test is to immerse the coating in a beaker containing 5.0wt% sulfuric acid solution, so that the 5.0wt% sulfuric acid solution immerses the coating, the coating sample is taken out after 4h, and the coating is observed for bubbling and the like, and after drying, the contact angle measuring instrument is used to test the contact angle of the coating surface to water.

[0130] The method for alkali resistance test is to immerse the coating in a beaker containing saturated calcium hydroxide solution, so that the saturated calcium hydroxide solution immerses the coating, the coating sample is taken out after 4h, and the coating is observed for bubbling and the like, and after drying, the contact angle measuring instrument is used to test the contact angle of the coating surface to water.

[0131] Contact angle test: pure water and salad oil are used for testing respectively, 5-point sampling is taken for average value. The droplet amount is 0.2ul for each test.

[0132] Hardness: pencil hardness test method.

Claims

1. A super hydrophilic anti-fog coating, characterized in that The super-hydrophilic anti-fog coating is prepared by mixing 50 parts by weight of solution A and 50 parts by weight of solution B, adding AMP95 to adjust the pH value to 4-5, and adding 0.1-0.5 parts by weight of dodecyl dihydroxyethyl betaine. The aforementioned solution A includes the following components and their weight ratios: 2-5 parts of (2-aminoethyl)trimethylammonium chloride hydrochloride; 3-8 parts of (3-glycidylpropoxy)trimethoxysilane; 90-120 parts water; The aforementioned solution B includes the following components and their weight ratios: The solid content of the acidic silica sol is 20% to 25%w.

2. The super hydrophilic anti-fog coating according to claim 1, characterized in that The solution A comprises the following components and their weight ratios: 2.8-5 parts of (2-aminoethyl)trimethylammonium chloride hydrochloride; 4-6 parts of (3-glycidylpropoxy)trimethoxysilane; 90-110 parts water; The solution B comprises the following components and their weight ratios:

3. The super hydrophilic anti-fog coating according to claim 1 or 2, characterized in that The particle size of the acidic silica sol is 5 to 10 nm.

4. A method for preparing the super hydrophilic anti-fog coating according to claim 1, 2 or 3, characterized in that The steps include: ① Add (2-aminoethyl)trimethylammonium chloride hydrochloride and (3-glycidylpropoxy)trimethoxysilane to water, stir, and heat to 35-45°C, continue stirring to obtain solution A; ② Take water, add acetic acid, ethyl orthosilicate, acidic silica sol, nano-titanium oxide and polyethylene glycol trimethoxysilyl propyl ether under stirring, and stir to obtain solution B; ③ Take solution A and solution B and mix them thoroughly, add AMP95 to adjust the pH value to 4-5, add dodecyl dihydroxyethyl betaine, stir, and then perform ultrasonic homogenization to obtain a super hydrophilic anti-fog coating.

5. Use of the super hydrophilic anti-fog coating according to claim 1, 2 or 3 on glass.

6. The use according to claim 5, characterized in that The steps include: Pour the cleaning liquid into the ultrasonic cleaning machine, put a piece of glass in, ultrasonically clean it, take it out and wipe it dry, then put it into the plasma cleaning machine for cleaning, take it out and get the glass for use; The super-hydrophilic anti-fog coating is added into a spray gun, sprayed onto the glass surface, and dried to obtain an organic or inorganic super-hydrophilic anti-fog glass.

7. The use according to claim 6, characterized in that The cleaning solution is obtained by fully mixing the following components in a weight ratio: 20 parts water, 2 parts hydrogen peroxide, 5 parts ethanol and 1 part sodium lauryl sulfate.

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