A super-hydrophilic long-acting antibacterial glass coating composition and preparation method thereof

Abstract

The present invention belongs to the technical field of glass functional coatings, and discloses a super-hydrophilic long-acting antibacterial glass coating composition and a preparation method thereof. A silicon source is added to an ethanol aqueous solution, acid is added for reaction, and a silica sol is obtained. Then, a silver nitrate solution is added for ultrasonic stirring and mixing, ammonia water is added for stirring and reaction, and the mixture is allowed to stand for aging to obtain a wet silica gel loaded with nano silver oxide in situ, which is dried, roasted, and ground to obtain porous nano silica loaded with silver, which is mixed and dispersed evenly with the silica sol to obtain a super-hydrophilic long-acting antibacterial glass coating composition. The present invention loads silver by a specific method, and while obtaining the super-strong antibacterial performance of nano silver, the super-hydrophilic and easy-to-clean characteristics of the coating can also be significantly improved. It can be applied to the antibacterial and anti-fingerprint treatment of the surface of glass products.

Description

Technical Field

[0001] The invention relates to the technical field of glass functional coatings, in particular to a super-hydrophilic long-acting antibacterial glass coating composition and a preparation method thereof. Background Art

[0002] With the development of society and the advancement of science and technology, the application of touch panels is becoming more and more popular. Touch screen technology originated in the 1970s and was first used in the US military. Since then, the technology has gradually shifted to civilian use. With the development of electronic technology, network technology and the popularization of Internet applications, new generation touch screen technologies and products have emerged one after another. Gradually, this most relaxed human-computer interaction technology has been pushed into many fields. In addition to being used in personal portable information products, it is also widely used in home appliances, public information (such as e-government, business inquiries in banks, hospitals, power departments, etc.), electronic games, communication equipment, office automation equipment, information collection equipment and industrial equipment, etc. Although touch screen technology has only been used in my country for more than ten years, it has become the most acceptable computer input method for ordinary people after keyboard, mouse, handwriting board and voice input. With this technology, users can operate the host by simply touching the icons or text on the computer display with their fingers, making human-computer interaction more straightforward. This technology greatly facilitates users and has become a very attractive new multimedia interactive device.

[0003] Due to the use characteristics of touch screens, they are frequently touched by fingers, and the following problems occur during use: First, the glass panel on the surface of the touch screen will be contaminated with various fingerprints or oil during frequent touches, affecting the appearance and light transmittance, and making the display effect worse; second, long-term touch and swipe will cause scratches and wear on the glass panel on the surface of the touch screen, which also affects the appearance and light transmittance, and makes the display effect worse; third, due to frequent contact with human skin, a large number of bacteria will breed on the surface of the touch screen, which poses a potential threat to human health. Therefore, how to make the glass panel super hydrophilic, easy to clean, anti-fingerprint, wear-resistant, and antibacterial is of great significance.

[0004] Patent CN 109020258 A discloses a method for preparing antibacterial and anti-fingerprint touch glass display panel coating. Conventional display coating is performed on the back of the glass panel to enhance the conductive performance. An antibacterial and anti-fingerprint film is also coated on the front of the glass panel. Nanosilver has a broad-spectrum antibacterial effect, and anti-fingerprint is achieved by applying a frosted particle layer on the surface of the film to disperse the fingerprint lines of the finger as much as possible, thereby achieving anti-fingerprint. The structural design is unique, integrating the three functions of antibacterial, anti-fingerprint, display and control in one, saving energy and reducing consumption, easy installation, and easy use and maintenance. Patent CN 107500555 A discloses an antibacterial and durable coated glass for touch screens and a preparation method thereof. An antibacterial film is formed by spraying an antibacterial coating liquid on the surface of a glass substrate and curing it. The surface of the antibacterial film has an uneven microstructure. The antibacterial coating liquid uses ethanol as the main solvent and is dispersed with nano ZnO / SiO2 particles. The nano ZnO / SiO2 particles are a core-shell structure with silver-doped nano ZnO as the core and SiO2 as the porous shell. The use of silver-doped nano ZnO / SiO2 particles in the antibacterial coating can not only form an anti-glare film with an uneven microstructure on the surface of the glass substrate, but also effectively maintain the superior photocatalytic properties of the inner core ZnO, and also achieve a firm bond with the transparent glass substrate through the SiO2 shell, thereby preparing antibacterial and durable coated glass.

[0005] It can be seen from the above prior art that preparing a functional coating on the surface of a glass panel is a feasible method to solve the above-mentioned touch screen defects. Therefore, developing a glass coating composition that can simultaneously achieve the effects of super-hydrophilicity, easy cleaning, anti-fingerprint, wear resistance, and antibacterial has a broad market prospect. Summary of the invention

[0006] Based on the above prior art, the primary purpose of the present invention is to provide a method for preparing a super-hydrophilic long-acting antibacterial glass coating composition.

[0007] Another object of the present invention is to provide a super-hydrophilic long-acting antibacterial glass coating composition prepared by the above method.

[0008] Another object of the present invention is to provide an application of the super-hydrophilic long-acting antibacterial glass coating composition in antibacterial and anti-fingerprint treatment of glass product surfaces.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A method for preparing a super-hydrophilic long-acting antibacterial glass coating composition comprises the following preparation steps:

[0011] (1) adding a silicon source to an ethanol aqueous solution and stirring to mix uniformly, and then adding an acidic catalyst and stirring to react to obtain a silica sol;

[0012] (2) adding silver nitrate solution to the silica sol in step (1) and stirring and mixing evenly, then adding ammonia water and stirring to react, standing and aging, to obtain a wet silica gel loaded with nano-silver oxide in situ;

[0013] (3) drying, calcining, and grinding the wet gel obtained in step (2) to obtain porous nano-silicon dioxide loaded with silver;

[0014] (4) The porous nano-silicon dioxide loaded with silver obtained in step (3) is mixed and dispersed evenly with silica sol to obtain a super-hydrophilic long-acting antibacterial glass coating composition.

[0015] Furthermore, the silicon source in step (1) is selected from at least one of water glass, tetraethyl orthosilicate (TEOS), methyltrimethoxysilane (MTMS) and methyltriethoxysilane (MTES).

[0016] Furthermore, the acidic catalyst in step (1) is selected from at least one of hydrochloric acid, sulfuric acid, nitric acid and oxalic acid. The amount of the acidic catalyst added is to adjust the pH of the system to 4-6.

[0017] Furthermore, the stirring reaction temperature in step (1) is 25 to 60° C., and the stirring reaction time is 0.5 to 4 h.

[0018] Furthermore, it is best to control the solid content of the silica sol obtained in step (1) to 10% to 20%.

[0019] Furthermore, the amount of the silver nitrate solution added in step (2) is 1% to 6% of the mass of silicon dioxide in the silica sol in terms of silver content.

[0020] Furthermore, the volume ratio of water to ethanol in the system after adding the silver nitrate solution in step (2) is controlled to be 1:(2-4). Controlling the content of ethanol in this step is relatively important. If the ethanol content is too low, the electrolyte effect after adding the silver nitrate solution will cause the sol particles to coagulate prematurely, reduce stability, and cause the product particle size to increase and silver cannot be effectively loaded.

[0021] Furthermore, the power of the ultrasound in step (2) is 100 to 300W.

[0022] Furthermore, the amount of ammonia water added in step (2) is to maintain the pH value of the system at 8 to 10 during the reaction.

[0023] Furthermore, the temperature of the static aging in step (2) is 30 to 70° C., and the time is 6 to 24 hours.

[0024] Furthermore, the drying in step (3) refers to drying at a temperature of 50 to 180°C.

[0025] Furthermore, the calcination in step (3) refers to calcination at 250-300°C.

[0026] Furthermore, the mass ratio of the porous nano-silicon dioxide loaded with silver in step (4) to the silicon dioxide contained in the mixed silica sol is 1:(0.5-2). It should be noted that the silica sol in step (4) can be the silica sol prepared according to the method of step (1) of the present invention, or it can be commercially purchased silica sol. As long as its composition is a dispersion of nano-scale silicon dioxide particles in water or solvent, the purpose of the present invention can be achieved.

[0027] Furthermore, the solid content of the super-hydrophilic long-acting antibacterial glass coating composition in step (4) is 15% to 25%.

[0028] A super-hydrophilic long-acting antibacterial glass coating composition is prepared by the method.

[0029] The application of the super-hydrophilic long-lasting antibacterial glass coating composition in the antibacterial and anti-fingerprint treatment of the surface of glass products comprises the following steps: applying the super-hydrophilic long-lasting antibacterial glass coating composition to the surface of the glass product, and then heating and curing the glass product at a temperature of 50 to 180° C. to obtain a coating.

[0030] Furthermore, the coating includes but is not limited to spray coating, spin coating, scraping coating and other coating methods.

[0031] The principle of the present invention is: porous nano-silicon dioxide is prepared by Sol-Gel technology, silver nitrate solution is introduced into silica sol before gelation, silver nitrate enters the center of sol micelle through the solvent action of water and ethanol and ultrasonic treatment, and then ammonia water is added for reaction, one of the functions of ammonia water is to serve as a catalyst for gelation, and the second function is to react with the silver nitrate entering the center of sol micelle to generate nano-scale silver oxide in situ. The obtained wet gel is dried to obtain aerogel, and in the drying process, the nano-scale silver oxide generated in situ can form a good support for the gel network, effectively preventing the phenomenon that the gel skeleton is easy to cause skeleton collapse in the drying process. Then, after roasting, the silver oxide is decomposed in situ to generate nano-silver single substance with high antibacterial effect, and the oxygen and other impurities generated by decomposition, such as ammonium nitrate, are released to further ensure the porous structure of the obtained nano-silicon dioxide, and significantly enhance its hydrophilicity.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] (1) The glass coating composition of the present invention contains porous nano-silicon dioxide loaded with silver prepared by a specific method, and the loaded nano-silver can exert a super strong antibacterial ability; and the obtained porous nano-silicon dioxide has a super strong hydrophilicity compared with conventional silica nanoparticles, and the obtained glass coating has better easy-to-clean and anti-fingerprint effects.

[0034] (2) The present invention mixes the porous nano-silicon dioxide loaded with silver prepared by a specific method with silica sol to prepare a coating composition, which provides more binding sites for the nucleation of the sol-gel on the glass surface during the coating curing process, which is conducive to the formation of a dense and uniform coating. At the same time, the porous nano-silicon dioxide loaded with silver has a stronger bonding force with the glass substrate due to its porous structure, which significantly improves the wear resistance of the coating.

[0035] (3) The present invention uses a specific method to load silver, and while obtaining the super antibacterial properties of nanosilver, it also effectively supports the gel skeleton during the formation of nanosilica aerogel to prevent the skeleton from collapsing, and the escape of gaseous substances generated by calcination and decomposition further ensures the three-dimensional porous structure of the obtained nanosilica. Compared with conventional silica aerogels, it has higher porosity and super hydrophilicity.

[0036] (4) After curing, the coating of the present invention is a pure inorganic component, non-toxic and harmless, with ultra-high hardness (10H, Japan Mitsubishi pencil test) and abrasion resistance of more than 100,000 times. It has the characteristics of easy cleaning and anti-fingerprint. The surface oil and stains can be easily wiped off after wetting with water without the help of cleaning agents or alcohol. The mobile phone glass treated with this nano coating has a super strong and fast antibacterial effect, and the antibacterial performance has passed the most stringent Japanese industrial antibacterial standard (JIS Z 2801-2010). DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is further described in detail below with reference to examples, but the embodiments of the present invention are not limited thereto. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] A super-hydrophilic long-acting antibacterial glass coating composition of this embodiment is prepared by the following method:

[0040] (1) Add tetraethyl orthosilicate to an ethanol-water solution in a volume ratio of 1:1 and stir to mix evenly, then add 1 mol / L hydrochloric acid to adjust the pH of the system to 4-6, stir and react at 50-60° C. for 2 h, and by controlling the amount of tetraethyl orthosilicate and the ethanol-water solution added, a silica sol with a solid content of about 20% is obtained.

[0041] (2) The silica sol obtained in step (1) is diluted with 1 volume of ethanol (to prevent the electrolyte effect after the addition of silver nitrate solution from causing premature coagulation of the sol particles), and then 0.5 mol / L silver nitrate solution is added, and the mixture is uniformly mixed by ultrasonic stirring at 200 W for 2 h. The amount of silver nitrate solution added is 5% of the mass of silicon dioxide in the silica sol in terms of silver content, and then ammonia water is added to maintain the pH value of the system at 8-10. The reaction is stirred at room temperature for 2 h, and the mixture is allowed to stand for aging at 60° C. in a water bath for 8 h to obtain a wet silica gel loaded with nano-silver oxide in situ.

[0042] (3) The wet gel obtained in step (2) is dried at 100° C. and calcined at 250° C. to obtain aerogel, which is then ground to obtain porous nano-silicon dioxide loaded with silver.

[0043] (4) The porous nano-silicon dioxide loaded with silver obtained in step (3) is mixed and dispersed evenly with a silica sol having a solid content of 10% and a particle size of 40 to 60 nm, wherein the mass ratio of the porous nano-silicon dioxide loaded with silver to the silica contained in the mixed silica sol is 1:1, thereby obtaining a super-hydrophilic long-acting antibacterial glass coating composition.

[0044] The physicochemical properties and film performance tests of the super-hydrophilic long-lasting antibacterial glass coating composition obtained in this embodiment. The test film coating preparation is to apply the super-hydrophilic long-lasting antibacterial glass coating composition to the surface of the glass product, and then bake it at 50°C for 10 minutes and 180°C for 30 minutes for curing treatment to obtain the film coating. The corresponding test results and test standards are shown in Table 1 below.

[0045] Table 1

[0046]

[0047] Example 2

[0048] A super-hydrophilic long-acting antibacterial glass coating composition of this embodiment is prepared by the following method:

[0049] (1) Adding tetraethyl orthosilicate and methyltrimethoxysilane to an ethanol aqueous solution in a volume ratio of 2:1 and stirring to mix evenly, then adding oxalic acid to adjust the pH of the system to 4-6, stirring and reacting at 50-60° C. for 2 h, and by controlling the amount of tetraethyl orthosilicate, methyltrimethoxysilane and ethanol aqueous solution added, a silica sol with a solid content of about 10% is obtained.

[0050] (2) Add 0.5 mol / L silver nitrate solution to the silica sol obtained in step (1), stir at 300 W ultrasonically for 2 h to mix evenly, wherein the amount of silver nitrate solution added is 3% of the mass of silica in the silica sol in terms of silver content, then add ammonia water to maintain the pH value of the system at 8-10, stir at room temperature for 2 h, and allow to stand in a water bath at 70° C. for aging for 12 h to obtain a wet silica gel loaded with nano-silver oxide in situ.

[0051] (3) The wet gel obtained in step (2) is dried at 120° C. and calcined at 300° C. to obtain aerogel, which is then ground to obtain porous nano-silicon dioxide loaded with silver.

[0052] (4) The porous nano-silicon dioxide loaded with silver obtained in step (3) is mixed and dispersed evenly with a silica sol having a solid content of 15% and a particle size of 20 to 40 nm, wherein the mass ratio of the porous nano-silicon dioxide loaded with silver to the silica contained in the mixed silica sol is 1:2, thereby obtaining a super-hydrophilic long-acting antibacterial glass coating composition.

[0053] The physicochemical properties and film performance tests of the super-hydrophilic long-lasting antibacterial glass coating composition obtained in this embodiment. The test film coating preparation is to apply the super-hydrophilic long-lasting antibacterial glass coating composition to the surface of the glass product, and then bake it at 50°C for 10 minutes and 180°C for 30 minutes for curing treatment to obtain the film coating. The corresponding test results and test standards are shown in Table 2 below.

[0054] Table 2

[0055]

[0056]

[0057] Example 3

[0058] A super-hydrophilic long-acting antibacterial glass coating composition of this embodiment is prepared by the following method:

[0059] (1) Water glass and methyltrimethoxysilane are added to an ethanol-water solution in a volume ratio of 3:1 and stirred to mix evenly, then 1 mol / L hydrochloric acid is added to adjust the pH of the system to 4-6, and the mixture is stirred at 50-60° C. for 2 h. By controlling the amount of water glass, methyltrimethoxysilane and ethanol-water solution added, a silica sol with a solid content of about 15% is obtained.

[0060] (2) Add 0.5 mol / L silver nitrate solution to the silica sol obtained in step (1), stir at 100 W ultrasonically for 2 h to mix evenly, wherein the amount of silver nitrate solution added is 1% of the mass of silica in the silica sol in terms of silver content, then add ammonia water to maintain the pH value of the system at 8-10, stir at room temperature for 2 h, and allow to stand in a water bath at 50° C. for aging for 24 h to obtain a wet silica gel loaded with nano-silver oxide in situ.

[0061] (3) The wet gel obtained in step (2) is dried at 150° C. and calcined at 250° C. to obtain aerogel, which is then ground to obtain porous nano-silicon dioxide loaded with silver.

[0062] (4) The porous nano-silicon dioxide loaded with silver obtained in step (3) is mixed and dispersed evenly with a silica sol having a solid content of 10% and a particle size of 10 to 60 nm, wherein the mass ratio of the porous nano-silicon dioxide loaded with silver to the silica contained in the mixed silica sol is 1.5:1, thereby obtaining a super-hydrophilic long-acting antibacterial glass coating composition.

[0063] The physicochemical properties and film performance tests of the super-hydrophilic long-lasting antibacterial glass coating composition obtained in this embodiment. The test film coating preparation is to apply the super-hydrophilic long-lasting antibacterial glass coating composition to the surface of the glass product, and then bake it at 50°C for 10 minutes and 180°C for 30 minutes for curing treatment to obtain a film coating. The corresponding test results and test standards are shown in Table 3 below.

[0064] Table 3

[0065]

[0066] Example 4

[0067] A super-hydrophilic long-acting antibacterial glass coating composition of this embodiment is prepared by the following method:

[0068] (1) Add tetraethyl orthosilicate to an ethanol-water solution in a volume ratio of 1:1 and stir to mix evenly, then add 1 mol / L hydrochloric acid to adjust the pH of the system to 4-6, stir and react at 50-60° C. for 2 h, and by controlling the amount of tetraethyl orthosilicate and the ethanol-water solution added, a silica sol with a solid content of about 20% is obtained.

[0069] (2) The silica sol obtained in step (1) was diluted with 1 volume of ethanol, and then a 0.5 mol / L silver nitrate solution was added, and the mixture was uniformly mixed by ultrasonic stirring at 200 W for 2 h, wherein the amount of the silver nitrate solution added was 4% of the mass of the silica in the silica sol in terms of silver content, and then ammonia water was added to maintain the pH value of the system at 8-10, and the reaction was stirred at room temperature for 2 h, and then the mixture was allowed to stand and age at 60° C. in a water bath for 8 h to obtain a wet silica gel loaded with nano-silver oxide in situ.

[0070] (3) The wet gel obtained in step (2) is dried at 100° C. and calcined at 250° C. to obtain aerogel, which is then ground to obtain porous nano-silicon dioxide loaded with silver.

[0071] (4) The porous nano-silicon dioxide loaded with silver obtained in step (3) is mixed and dispersed evenly with a silica sol having a solid content of 10% and a particle size of 10 to 60 nm, wherein the mass ratios of the porous nano-silicon dioxide loaded with silver to the silica contained in the mixed silica sol are 1:2, 1:1 and 2:1, respectively, to obtain super-hydrophilic long-acting antibacterial glass coating compositions with different porous nano-silicon dioxide contents.

[0072] Comparative Example 1

[0073] A glass coating composition of this comparative example is prepared by the following method:

[0074] (1) Add tetraethyl orthosilicate to an ethanol-water solution in a volume ratio of 1:1 and stir to mix evenly, then add 1 mol / L hydrochloric acid to adjust the pH of the system to 4-6, stir and react at 50-60° C. for 2 h, and by controlling the amount of tetraethyl orthosilicate and the ethanol-water solution added, a silica sol with a solid content of about 20% is obtained.

[0075] (2) The silica sol obtained in step (1) was diluted with 1 volume of ethanol, and then ammonia water was added to maintain the pH value of the system at 8-10, and the mixture was stirred at room temperature for 2 hours, and then aged in a water bath at 60° C. for 8 hours to obtain a wet silica gel.

[0076] (3) The wet gel obtained in step (2) is dried at 100° C. and calcined at 250° C. to obtain aerogel, which is then ground to obtain porous nano-silica.

[0077] (4) The porous nano-silica obtained in step (3) is mixed and dispersed evenly with a silica sol having a solid content of 10% and a particle size of 10 to 60 nm, wherein the mass ratios of the porous nano-silica to the silica contained in the mixed silica sol are 1:2, 1:1 and 2:1, respectively, to obtain glass coating compositions with different porous nano-silica contents.

[0078] The glass coating compositions obtained in Example 4 and Comparative Example 1 were tested for easy-cleaning properties, and pure silica sol coating was used as a control. The test results are shown in Table 4 below.

[0079] Table 4

[0080]

[0081] It can be seen from the results in Table 4 that the present invention uses a specific method to load silver, and while obtaining the super antibacterial property of nanosilver, it also has the effect of significantly improving the easy-to-clean property. The reason is that the process of loading silver effectively supports the gel skeleton in the process of forming nanosilica aerogel, preventing the skeleton from collapsing, and the escape of gaseous substances generated by calcination and decomposition further ensures the three-dimensional porous structure of the obtained nanosilica, which has a higher porosity and super hydrophilicity than conventional silica aerogel.

[0082] The above describes the specific embodiments of the invention. The methods and parameters not described in detail should be understood to be implemented in a common manner in the art; those skilled in the art can make various modifications or modifications within the scope of the claims, and make some simple deductions, deformations or substitutions, which do not affect the essence of the invention.

Claims

1. Application of a super-hydrophilic long-lasting antibacterial glass coating composition in antibacterial and anti-fingerprint treatment of glass product surfaces, characterized in that The application process is: coating the super-hydrophilic long-acting antibacterial glass coating composition on the surface of the glass product, and then heating and curing it at a temperature of 50 to 180° C. to obtain a coating; The super-hydrophilic long-acting antibacterial glass coating composition is prepared by the following method: (1) adding a silicon source to an ethanol aqueous solution and stirring to mix uniformly, and then adding an acidic catalyst and stirring to react to obtain a silica sol; (2) adding silver nitrate solution to the silica sol in step (1) and stirring and mixing evenly, then adding ammonia water and stirring to react, standing and aging, to obtain a wet silica gel loaded with nano-silver oxide in situ; (3) drying, calcining, and grinding the wet gel obtained in step (2) to obtain porous nano-silicon dioxide loaded with silver; (4) mixing and dispersing the silver-loaded porous nano-silicon dioxide obtained in step (3) and silica sol to obtain a super-hydrophilic long-acting antibacterial glass coating composition; After adding the silver nitrate solution in step (2), the volume ratio of water to ethanol in the system is controlled to be 1:(2-4); The mass ratio of the silver-loaded porous nano-silicon dioxide to the silicon dioxide contained in the mixed silica sol in step (4) is 1:(0.5-2); the solid content of the super-hydrophilic long-acting antibacterial glass coating composition is 15%-25%.

2. The use of a super-hydrophilic long-acting antibacterial glass coating composition according to claim 1 in antibacterial and anti-fingerprint treatment of glass product surfaces, characterized in that: In step (1), the silicon source is selected from at least one of water glass, ethyl orthosilicate, methyltrimethoxysilane and methyltriethoxysilane; the acidic catalyst is selected from at least one of hydrochloric acid, sulfuric acid, nitric acid and oxalic acid; and the amount of the acidic catalyst added is to adjust the pH of the system to 4-6.

3. The use of a super-hydrophilic long-acting antibacterial glass coating composition according to claim 1 in antibacterial and anti-fingerprint treatment of glass product surfaces, characterized in that: The stirring reaction temperature in step (1) is 25-60° C., and the stirring reaction time is 0.5-4 h; the solid content of the obtained silica sol is controlled to be 10%-20%.

4. The use of a super-hydrophilic long-acting antibacterial glass coating composition according to claim 1 in antibacterial and anti-fingerprint treatment of glass product surfaces, characterized in that: The amount of the silver nitrate solution added in step (2) is 1% to 6% of the mass of silicon dioxide in the silica sol in terms of silver content.

5. The use of a super-hydrophilic long-acting antibacterial glass coating composition according to claim 1 in antibacterial and anti-fingerprint treatment of glass product surfaces, characterized in that: The power of the ultrasound in step (2) is 100-300W; the amount of ammonia water added is to maintain the pH value of the system at 8-10 during the reaction; the temperature of the static aging is 30-70°C, and the time is 6-24h.

6. The use of a super-hydrophilic long-acting antibacterial glass coating composition according to claim 1 in antibacterial and anti-fingerprint treatment of glass product surfaces, characterized in that: The drying in step (3) refers to drying at a temperature of 50 to 180°C, and the calcining refers to calcining at a temperature of 250 to 300°C.

Images