A glass surface easy-to-clean coating and a method of making

Abstract

This application relates to the field of chemical coating technology, and discloses an easy-to-clean coating for glass surfaces and its preparation method. The coating includes a spraying liquid, which, by weight, comprises the following raw materials: 3-4 parts by weight of zinc oxide nanowires modified with KH-560; 9-10 parts by weight of nano-alumina modified with KH-550; 6-8 parts by weight of hydroxyl-terminated polydimethylsiloxane; 2-4 parts by weight of tetraethyl orthosilicate; and 80-100 parts by weight of anhydrous ethanol. The easy-to-clean glass surface coating of this application, by employing a combination of zinc oxide nanowires and nano-alumina fillers and modifying them with different coupling agents, combined with other raw materials in the system, enables the coating to simultaneously possess excellent hydrophobicity, durability, hardness, adhesion, and antibacterial properties.

Description

Technical Field

[0001] This application relates to the field of chemical coating technology, and mainly to an easy-to-clean coating for glass surfaces and its preparation method. Background Technology

[0002] Glass is a building material used in vast quantities, so cleaning it requires significant manpower and financial resources. To make glass easier to clean, current techniques typically involve applying a special functional coating to the glass surface, giving it hydrophobic and stain-resistant properties. To easily and quickly apply different functional coatings to any type of glass, most methods involve compounding functional components into a solution-based product, which is then simply sprayed on and self-cures in a mild environment, rapidly building a protective coating for the glass.

[0003] Traditional easy-clean coatings for glass surfaces primarily achieve hydrophobic and oleophobic effects by reducing the surface energy of the coating, thereby reducing the adhesion of stains to the surface. However, this reliance on low surface energy for easy cleaning has several limitations. First, the surfactant components of low surface energy materials, such as fluoropolymers or silane compounds, are easily lost or degraded during use due to friction, ultraviolet radiation, and chemical corrosion, leading to a weakening of the hydrophobic effect and a decline in easy-clean performance. Second, simple low surface energy coatings are relatively weak against oily stains, which easily spread on the surface and are difficult to clean thoroughly. Therefore, traditional easy-clean coatings have significant shortcomings in terms of durability and oil resistance, making it difficult to meet the growing market demand.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide an easy-to-clean coating for glass surfaces and a preparation method thereof, in order to solve the problem that the durability of existing easy-to-clean coatings for glass surfaces needs to be improved.

[0006] The technical solution of this application is as follows:

[0007] An easy-to-clean coating for glass surfaces, comprising a spraying liquid, said spraying liquid comprising, by weight, the following raw materials:

[0008] Zinc oxide nanowires modified with KH-560: 3-4 parts by weight;

[0009] Nano-alumina modified with KH-550: 9-10 parts by weight;

[0010] Hydroxyl-terminated polydimethylsiloxane: 6-8 parts by weight;

[0011] Ethyl orthosilicate: 2-4 parts by weight;

[0012] Anhydrous ethanol: 80-100 parts by weight.

[0013] The easy-to-clean coating for glass surfaces, wherein the preparation process of the zinc oxide nanowires modified with KH-560 includes the following steps:

[0014] Zinc oxide nanowires were dispersed in an aqueous ethanol solution to obtain a zinc oxide nanowire dispersion; each gram of zinc oxide nanowires was dispersed in 50 mL of aqueous ethanol solution.

[0015] Take 1-2 wt% of KH-560 by weight of zinc oxide nanowires and prepare a 5 wt% KH-560 anhydrous ethanol solution.

[0016] The zinc oxide nanowire dispersion was mixed with KH-560 anhydrous ethanol solution, and the pH was adjusted to 5.0-6.0.

[0017] React at 50-60℃ water bath with stirring at 300-400 rpm for 1-1.5 hours;

[0018] After a first centrifugation, the precipitate was washed 2-3 times with anhydrous ethanol by centrifugation, and then the precipitate was vacuum dried at 60-80℃ for 2-4 hours to obtain the zinc oxide nanowires modified by KH-560.

[0019] The easy-to-clean coating for glass surfaces, wherein the preparation process of the nano-alumina modified with KH-550 includes the following steps:

[0020] Nano-alumina was dispersed in an aqueous ethanol solution to obtain a nano-alumina dispersion; each 2 grams of nano-alumina was dispersed in 50 mL of aqueous ethanol solution.

[0021] Take 1-2 wt% of KH-550 (based on the mass of nano-alumina) and prepare a 5 wt% KH-550 anhydrous ethanol solution.

[0022] Mix the nano-alumina dispersion with KH-550 anhydrous ethanol solution and adjust the pH to 7-9.

[0023] React at 70-80℃ water bath with stirring at 300-400 rpm for 2-3 hours;

[0024] After the first centrifugation, the precipitate was washed 2-3 times with anhydrous ethanol by centrifugation, and then the precipitate was vacuum dried at 70-80℃ for 2-4 hours to obtain the nano-alumina modified by KH-550.

[0025] The easy-to-clean coating for glass surfaces, wherein the zinc oxide nanowires have a diameter of 40-60 nm and a length of 15-20 μm.

[0026] The easy-to-clean coating for glass surfaces, wherein the nano-alumina is γ-Al2O3 with a particle size of 10-20 nm.

[0027] The aforementioned easy-to-clean coating for glass surfaces contains hydroxyl-terminated polydimethylsiloxane with a molecular weight of 4200 and a viscosity between 80-130 cSt.

[0028] The easy-to-clean coating for glass surfaces, wherein the spraying liquid further includes KH-570, wherein KH-570 accounts for 0.3-0.5 wt% of the total weight of the zinc oxide nanowires modified with KH-560 and the nano-alumina modified with KH-550.

[0029] The easy-clean coating for glass surfaces further includes a glass substrate pretreatment liquid for pretreating the glass surface.

[0030] The glass substrate pretreatment solution is a 1wt% KH-560 ethanol aqueous solution.

[0031] A method for preparing an easy-to-clean coating for glass surfaces as described above, comprising the following steps:

[0032] Zinc oxide nanowires modified with KH-560 and nano-alumina modified with KH-550 were added to anhydrous ethanol and mixed evenly to obtain a mixed dispersion. The mixing process involved first ultrasonically dispersing at 100-150W and 30-50kHz for 3-5 minutes, and then stirring at a low speed of 300-500rpm for 8-12 minutes.

[0033] Continue to add hydroxyl-terminated polydimethylsiloxane and tetraethyl orthosilicate sequentially to the mixed dispersion, and stir at 300-500 rpm for 13-17 min;

[0034] Adjust the pH to between 7.0 and 8.5, stir and age at 400-500 rpm, and age in a water bath at 35-45℃ for 20-30 minutes.

[0035] The method for preparing the easy-to-clean coating for glass surfaces, before adding hydroxyl-terminated polydimethylsiloxane and tetraethyl orthosilicate, further includes the following steps:

[0036] Take 0.3-0.5 wt% of KH-570, which accounts for the total weight of the zinc oxide nanowires modified by KH-560 and the nano-alumina modified by KH-550, and prepare a 5 wt% KH-570 ethanol aqueous solution. Adjust the pH to 4.0-4.5 and stir at 300-400 rpm for 30-60 minutes at 40-50℃.

[0037] Add KH-570 ethanol aqueous solution to the mixed dispersion and mix evenly; wherein, the process of mixing evenly is to first stir at 400-500 rpm for 25-35 minutes, and then sonicate at 100-150W and 30-50kHz for 3-5 minutes.

[0038] Beneficial effects: The easy-to-clean coating for glass surfaces of this application uses a combination of zinc oxide nanowires and nano-alumina fillers, and modifies them with different coupling agents. Combined with other raw materials in the system, the coating simultaneously possesses excellent hydrophobicity, durability, hardness, adhesion, and antibacterial properties. Attached Figure Description

[0039] Figure 1 The embodiments of this application show the situation of water on the glass surface, wherein (a) is a coating formed with an easy-to-clean coating for the glass surface; and (b) is a coating without an easy-to-clean coating for the glass surface. Detailed Implementation

[0040] This application provides an easy-to-clean coating for glass surfaces and a method for preparing it. To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following provides a more detailed description. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application.

[0041] This application provides an easy-to-clean coating for glass surfaces, which is divided into a spraying liquid and a glass substrate pretreatment liquid;

[0042] The glass substrate pretreatment solution is used to pretreat the glass surface. The glass substrate pretreatment solution is a 1wt% KH-560 ethanol aqueous solution.

[0043] The spraying liquid, by weight, includes the following raw materials:

[0044] Zinc oxide nanowires (ZnONWs, diameter: 40-60nm, length: 15-20μm) modified with KH-560: 3-4 parts by weight;

[0045] Nano-alumina (γ-Al2O3, particle size 10-20nm) modified with KH-550: 9-10 parts by weight;

[0046] Hydroxyl-terminated polydimethylsiloxane (H-PDMS): 6-8 parts by weight;

[0047] Tetraethyl orthosilicate (TEOS): 2-4 parts by weight;

[0048] Anhydrous ethanol: 80-100 parts by weight;

[0049] Both zinc oxide nanowires and nano-alumina underwent surface modification treatment to improve their chemical compatibility with the organic binder (H-PDMS) and the pretreatment layer (KH-560) on the glass substrate surface, thereby enhancing the coating's hardness and wear resistance. Before surface modification, the zinc oxide nanowires (ZnONWs) had a diameter of 40-60 nm and a length of 15-20 μm; the nano-alumina was γ-Al₂O₃ with a particle size of 10-20 nm.

[0050] Specifically, the zinc oxide nanowires were modified using KH-560. The modification process included the following steps:

[0051] Zinc oxide nanowires were dispersed in an aqueous ethanol solution to obtain a zinc oxide nanowire dispersion; wherein the volume ratio of ethanol to water in the aqueous ethanol solution was 95:5; each gram of zinc oxide nanowires was dispersed in 50 mL of the aqueous ethanol solution.

[0052] Take 1-2 wt% of KH-560 by weight of zinc oxide nanowires and prepare a 5 wt% KH-560 anhydrous ethanol solution.

[0053] The zinc oxide nanowire dispersion was mixed with KH-560 anhydrous ethanol solution, and the pH was adjusted to 5.0-6.0 with acetic acid.

[0054] React at 50-60℃ water bath with stirring at 300-400 rpm for 1-1.5 hours;

[0055] Perform an initial centrifugation, then wash the precipitate 2-3 times with anhydrous ethanol by centrifugation. Transfer the precipitate to a vacuum drying oven and dry at 60-80℃ for 2-4 hours to obtain KH-560 modified zinc oxide nanowires. The anhydrous ethanol washing process involves adding fresh anhydrous ethanol (approximately 0.5-1 times the volume of the original reaction solution) to the precipitate, stirring to redisperse the precipitate evenly, and then centrifuging to remove the supernatant. During the first centrifugation and washing, centrifugation at 4000-6000 rpm for 10-20 minutes is recommended.

[0056] Specifically, the nano-alumina modification was performed using KH-550. The process included the following steps:

[0057] Nano-alumina was dispersed in an ethanol-water solution to obtain a nano-alumina dispersion; wherein the volume ratio of ethanol to water in the ethanol-water solution was 95:5; every 2 grams of nano-alumina was dispersed in 50 mL of ethanol-water solution.

[0058] Take 1-2 wt% of KH-550 (based on the mass of nano-alumina) and prepare a 5 wt% KH-550 anhydrous ethanol solution.

[0059] Mix the nano-alumina dispersion with KH-550 anhydrous ethanol solution and adjust the pH to 7-9.

[0060] React at 70-80℃ water bath with stirring at 300-400 rpm for 2-3 hours;

[0061] Perform an initial centrifugation, then wash the precipitate 2-3 times with anhydrous ethanol by centrifugation. Transfer the precipitate to a vacuum drying oven and dry at 70-80℃ for 2-4 hours to obtain KH-550 modified nano-alumina. The anhydrous ethanol washing process involves adding fresh anhydrous ethanol (approximately 0.5-1 times the volume of the original reaction solution) to the precipitate, stirring to redisperse the precipitate evenly, and then centrifuging to remove the supernatant. During the first centrifugation and washing, centrifugation can be performed at 6000-8000 rpm for 15-20 minutes.

[0062] In this application, a hybrid modification approach is employed to leverage the synergistic effect of the two coupling agents, providing superior interfacial bonding for both zinc oxide nanowires and nano-alumina, thereby achieving better coating performance. KH-560 is used to modify the zinc oxide nanowires, imbuing their surface with epoxy groups, while KH-550 is used to modify the nano-alumina, imbuing its surface with amino groups. This synergistic effect of heterogeneous functional groups further enhances the coating's hardness, wear resistance, and adhesion. The amino groups on the nano-alumina surface can react with the epoxy groups on the zinc oxide nanowire surface, the epoxy groups in the KH-560 pretreatment layer, and the silanol groups generated from TEOS hydrolysis, thereby constructing a denser and more robust bridging covalent cross-linked network within the coating. Furthermore, the amino groups on the nano-alumina surface can connect the epoxy groups in the KH-560 pretreatment layer and the epoxy groups in the zinc oxide nanowires, improving the interfacial compatibility between the nano-alumina and zinc oxide nanowires and the glass substrate.

[0063] To improve the stability of the coating, KH-570 was added during the coating preparation process. KH-570 is used to improve the dispersion stability of inorganic powders (zinc oxide nanowires and nano-alumina), making the surface energies of the two different modified powders more consistent and reducing heterogeneous agglomeration. The amount of KH-570 used is 0.3-0.5 wt% of the total weight of zinc oxide nanowires and nano-alumina (before modification).

[0064] This application employs both nano-alumina and zinc oxide nanowires as inorganic fillers. Nano-alumina provides a rigid, wear-resistant framework, while zinc oxide nanowires disperse stress, enabling the coating to maintain high hardness while possessing a certain degree of toughness, making it less prone to cracking and peeling over long-term use. Furthermore, the spherical particles of nano-alumina fill the gaps in the zinc oxide nanowire network, while the zinc oxide nanowires prevent nano-alumina sedimentation, improving the coating's uniformity and storage stability. Nano-alumina and zinc oxide nanowires can construct a multi-level (nano + micron) rough synergistic low surface energy, significantly increasing the water contact angle and enhancing hydrophobic and easy-to-clean properties. Moreover, zinc oxide nanowires themselves possess photocatalytic activity and a contact antibacterial mechanism, inhibiting both Gram-positive bacteria (such as Staphylococcus aureus) and Gram-negative bacteria (such as Escherichia coli), giving the coating a long-lasting antibacterial effect.

[0065] Hydroxyl-terminated polydimethylsiloxanes can have a molecular weight of approximately 4200 and a viscosity between approximately 80-130 cSt.

[0066] This application also provides a method for preparing the above-mentioned easy-to-clean coating for glass surfaces, including the following steps:

[0067] Zinc oxide nanowires modified with KH-560 and nano-alumina modified with KH-550 were added to anhydrous ethanol and mixed evenly to obtain a mixed dispersion. The mixing process can be carried out by first ultrasonically dispersing at 100-150W and 30-50kHz for 3-5 minutes, and then stirring at a low speed of 300-500rpm for 8-12 minutes to ensure that the zinc oxide nanowires and nano-alumina are evenly dispersed, avoid local agglomeration, and ensure uniform contact of functional groups.

[0068] Take 0.3-0.5 wt% of KH-570, which accounts for 1 / 3 of the total weight of zinc oxide nanowires modified with KH-560 and nano-alumina modified with KH-550, and prepare a 5 wt% KH-570 ethanol aqueous solution. Adjust the pH to 4.0–4.5 with acetic acid and stir at 300–400 rpm for 30–60 minutes at 40–50℃. The ethanol aqueous solution has a volume ratio of ethanol to water of 95:5.

[0069] Add KH-570 ethanol aqueous solution to the mixed dispersion and mix evenly. The mixing process can be carried out by first stirring at 400-500 rpm for 25-35 minutes, and then ultrasonically dispersing at 100-150W and 30-50kHz for 3-5 minutes to ensure that KH-570 is evenly in contact with the surfaces of the two powders.

[0070] Continue adding H-PDMS and TEOS sequentially to the mixed dispersion, and stir at 300-500 rpm for 13-17 min;

[0071] Slowly add 0.1M ammonia solution or 0.1M NaOH solution, controlling the pH of the system to be stable between 7.0 and 8.5 (avoid exceeding 8.5), stir and age at 400-500 rpm, and age in a water bath at 35-45℃ for 20-30 minutes.

[0072] This application also provides a preferred method of using the above-mentioned easy-to-clean coating for glass surfaces, forming an easy-to-clean coating on the glass surface, comprising the following steps:

[0073] Pre-treatment of the glass surface:

[0074] Clean and dry the glass surface;

[0075] Spray KH-560 solution onto the glass surface and allow it to dry; the amount of KH-560 solution used is 5-10 mL / 100 cm² of glass surface area. 2 The KH-560 solution is a 1 wt% aqueous solution of KH-560 in ethanol, with a volume ratio of ethanol to water of 95:5. The pH is adjusted to 4.5 with acetic acid, and hydrolyzed at room temperature for 30-60 minutes.

[0076] Spraying: A multi-layer thin-spray process is used, applying 10-20 mL / 100 cm onto the glass surface. 2 Apply the easy-clean coating for glass surfaces of this application using the total amount of coating material. After each application, wait 10-20 minutes before applying the next application.

[0077] Curing: After spraying, let stand for 20-30 minutes, then heat to cure. The heating and curing process involves raising the temperature from room temperature to 60°C in 30-40 minutes, holding for 1 hour, raising the temperature to 80°C in 20-30 minutes, holding for 2 hours, and then cooling to room temperature with the oven.

[0078] The present application will be further described below through specific embodiments.

[0079] All raw materials used in the following examples are commercially available. The zinc oxide nanowires have a diameter of 40-60 nm and a length of 15-20 μm; the nano-alumina is γ-Al2O3 with a particle size of 10-20 nm; the hydroxyl-terminated polydimethylsiloxane has a molecular weight of approximately 4200 and a viscosity of approximately 100 cSt; tetraethyl orthosilicate is analytical grade; anhydrous ethanol is analytical grade; and KH-560, KH-550, and KH-570 are all commercially available industrial grade. Example

[0080] I. Modification of Nanopowders

[0081] (1) KH-560 modification of zinc oxide nanowires

[0082] Zinc oxide nanowires were dispersed in an ethanol-water solution (ethanol:water = 95:5, volume ratio) to obtain a dispersion of 1 g / 50 mL. 1.5 wt% KH-560 (based on the weight of the zinc oxide nanowires) was added to prepare a 5 wt% KH-560 anhydrous ethanol solution. The dispersion was mixed with the KH-560 anhydrous ethanol solution, and the pH was adjusted to 5.5 with acetic acid. The reaction was carried out in a 55°C water bath with stirring at 350 rpm for 1.2 hours. After the reaction, the mixture was centrifuged at 5000 rpm for 15 min. The precipitate was washed three times with anhydrous ethanol (each time half the volume of the ethanol-water solution was added, and the mixture was stirred and dispersed before centrifugation). Finally, the precipitate was transferred to a vacuum drying oven and dried under vacuum at 70°C for 3 hours to obtain zinc oxide nanowires modified with KH-560.

[0083] (2) KH-550 modification of nano-alumina

[0084] Nano-alumina was dispersed in an ethanol-water solution (ethanol:water = 95:5, volume ratio) to obtain a dispersion of 2 g / 50 mL. 1.5 wt% KH-550 (based on the mass of the nano-alumina) was added to prepare a 5 wt% KH-550 anhydrous ethanol solution. The dispersion was mixed with the KH-550 anhydrous ethanol solution, and the pH was adjusted to 8.0 with ammonia. The reaction was carried out in a 75°C water bath at 350 rpm for 2.5 hours with stirring. After the reaction, the mixture was centrifuged at 6000 rpm for 20 min. The precipitate was washed three times with anhydrous ethanol (each time half the volume of the ethanol-water solution was added, and the mixture was stirred and dispersed before centrifugation). Finally, the precipitate was transferred to a vacuum drying oven and dried under vacuum at 75°C for 3 hours to obtain KH-550-modified nano-alumina.

[0085] II. Coating Preparation

[0086] Weigh the following raw materials according to parts by weight:

[0087] Zinc oxide nanowires modified with KH-560: 3.5 parts; nano-alumina modified with KH-550: 9.5 parts; H-PDMS: 7 parts; TEOS: 3 parts; anhydrous ethanol: 80 parts.

[0088] The two modified powders were added to anhydrous ethanol, first ultrasonically dispersed at 120W and 40kHz for 4 minutes, and then stirred at low speed of 400rpm for 10 minutes to obtain a mixed dispersion.

[0089] Take 0.4 wt% of KH-570, which accounts for the total mass of the two modified powders, and prepare a 5 wt% KH-570 ethanol-water solution (ethanol:water = 95:5, volume ratio). Adjust the pH to 4.2 with acetic acid and stir at 350 rpm for 45 minutes at 45℃. Add the KH-570 solution to the mixed dispersion, stir at 450 rpm for 30 minutes, and then sonicate at 120 W and 40 kHz for 4 minutes.

[0090] Continue adding H-PDMS and TEOS in sequence, and stir at 400 rpm for 15 minutes.

[0091] Finally, 0.1M ammonia solution was slowly added dropwise to control the pH of the system to be stable at 7.5. The mixture was stirred at 450 rpm and aged in a 40°C water bath for 25 minutes to obtain the easy-to-clean glass surface coating of this application.

[0092] III. Glass Surface Pretreatment and Coating

[0093] (1) Pretreatment: Clean and dry ordinary soda-lime glass slides. Prepare a 1wt% KH-560 ethanol-water solution (ethanol:water = 95:5, volume ratio), adjust the pH to 4.5 with acetic acid, and hydrolyze for 45 min at room temperature. Apply 8 mL / 100 cm of the solution to the glass surface. 2 Spray the solution on and let it air dry.

[0094] (2) Coating: The glass surface easy-cleaning coating of this application is applied by a multi-layer thin spraying process at a total amount of 15mL / 100cm², with a 15min interval between each spraying, for a total of 3 sprayings.

[0095] (3) Curing: After spraying, let stand for 25 minutes, then heat to cure. Heating program: raise from room temperature to 60°C in 25 minutes and keep warm for 1 hour; raise to 80°C in 25 minutes and keep warm for 2 hours; cool to room temperature with the oven.

[0096] Comparative Example 1

[0097] The only difference from Example 1 is the modifier for nano-alumina: the nano-alumina is also modified with KH-560, which is the same as the modification method for zinc oxide nanowires.

[0098] Comparative Example 2

[0099] The only difference from Example 1 is the modifier for zinc oxide nanowires: the zinc oxide nanowires are also modified using KH-550, in the same way as the modification method for nano-alumina.

[0100] Comparative Example 3

[0101] The only difference from Example 1 is that KH-570 is not added during the coating preparation process.

[0102] The glass from Example 1 and Comparative Examples 1-3 were subjected to performance testing, and the testing standards are shown in Table 1. The test results are shown in Table 2.

[0103] Table 1

[0104]

[0105] Table 2

[0106]

[0107] As can be seen from Table 2, this application modifies zinc oxide nanowires and nano-alumina with KH-560 and KH-550 respectively, and introduces an appropriate amount of KH-570 as a dispersant and stabilizer, thus obtaining an easy-to-clean coating for glass surfaces that combines high hardness, excellent adhesion and long-term storage stability, overcoming the problem of insufficient durability in the prior art.

[0108] In addition, when water droplets were applied to the glass surface treated in Example 1 and to the surface of glass that had only been washed and dried, the results were as follows: Figure 1 As shown, the easy-to-clean coating for glass surfaces provided in Embodiment 1 of this application can significantly improve the hydrophobic properties of glass, making water droplets spherical at the edges of the glass surface and easy to roll off, effectively reducing stain adhesion and giving the glass easy-to-clean properties.

[0109] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of this application.

Claims

1. A glass surface easy-to-clean coating, characterized by, The spraying liquid comprises, by weight, the following raw materials: Zinc oxide nanowires modified with KH-560: 3-4 parts by weight; Nano-alumina modified with KH-550: 9-10 parts by weight; Hydroxyl-terminated polydimethylsiloxane: 6-8 parts by weight; Ethyl orthosilicate: 2-4 parts by weight; Anhydrous ethanol: 80-100 parts by weight; The preparation process of the zinc oxide nanowires modified with KH-560 includes the following steps: Zinc oxide nanowires were dispersed in an aqueous ethanol solution to obtain a zinc oxide nanowire dispersion; each gram of zinc oxide nanowires was dispersed in 50 mL of aqueous ethanol solution. Take 1-2 wt% of KH-560 by weight of zinc oxide nanowires and prepare a 5 wt% KH-560 anhydrous ethanol solution. The zinc oxide nanowire dispersion was mixed with KH-560 anhydrous ethanol solution, and the pH was adjusted to 5.0-6.

0. React at 50-60℃ water bath with stirring at 300-400 rpm for 1-1.5 hours; After a first centrifugation, the precipitate was washed 2-3 times with anhydrous ethanol by centrifugation, and then the precipitate was vacuum dried at 60-80℃ for 2-4 hours to obtain the zinc oxide nanowires modified by KH-560. The preparation process of the KH-550 modified nano-alumina includes the following steps: Nano-alumina was dispersed in an aqueous ethanol solution to obtain a nano-alumina dispersion; each 2 grams of nano-alumina was dispersed in 50 mL of aqueous ethanol solution. Take 1-2 wt% of KH-550 (based on the mass of nano-alumina) and prepare a 5 wt% KH-550 anhydrous ethanol solution. Mix the nano-alumina dispersion with KH-550 anhydrous ethanol solution and adjust the pH to 7-9. React at 70-80℃ water bath with stirring at 300-400 rpm for 2-3 hours; After the first centrifugation, the precipitate was washed 2-3 times with anhydrous ethanol by centrifugation, and then the precipitate was vacuum dried at 70-80℃ for 2-4 hours to obtain the nano-alumina modified by KH-550. The spraying liquid also includes KH-570, which accounts for 0.3-0.5 wt% of the total weight of the zinc oxide nanowires modified with KH-560 and the nano-alumina modified with KH-550.

2. The glass easy-to-clean coating according to claim 1, wherein The zinc oxide nanowires have a diameter of 40-60 nm and a length of 15-20 μm.

3. The glass easy-to-clean coating according to claim 1, wherein The nano-alumina is γ-Al2O3 with a particle size of 10-20 nm.

4. The glass easy-to-clean coating according to claim 1, wherein The molecular weight of hydroxyl-terminated polydimethylsiloxane is 4200, and the viscosity is 80-130 cSt.

5. The glass easy-to-clean coating of claim 1, wherein, The easy-clean coating for glass surfaces also includes a glass substrate pretreatment liquid for pretreatment of the glass surface; The glass substrate pretreatment solution is a 1wt% KH-560 ethanol aqueous solution.

6. A method for producing a glass easy-to-clean coating according to any one of claims 1 to 5, characterized in that Includes the following steps: Zinc oxide nanowires modified with KH-560 and nano-alumina modified with KH-550 were added to anhydrous ethanol and mixed evenly to obtain a mixed dispersion. The mixing process involved first ultrasonically dispersing at 100-150W and 30-50kHz for 3-5 minutes, and then stirring at a low speed of 300-500rpm for 8-12 minutes. Continue to add hydroxyl-terminated polydimethylsiloxane and tetraethyl orthosilicate sequentially to the mixed dispersion, and stir at 300-500 rpm for 13-17 min; Adjust the pH to between 7.0 and 8.5, stir and age at 400-500 rpm, and age in a water bath at 35-45℃ for 20-30 minutes.

7. The method of producing a glass easy-to-clean coating according to claim 6, wherein Before adding hydroxyl-terminated polydimethylsiloxane and tetraethyl orthosilicate, the following steps are also included: Take 0.3-0.5 wt% of KH-570, which is the total weight of the zinc oxide nanowires modified by KH-560 and the nano alumina modified by KH-550, and prepare a 5 wt% KH-570 ethanol aqueous solution. Adjust the pH to 4.0-4.5 and stir at 300-400 rpm for 30-60 minutes at 40-50℃. Add KH-570 ethanol aqueous solution to the mixed dispersion and mix evenly; wherein, the process of mixing evenly is to first stir at 400-500 rpm for 25-35 minutes, and then sonicate at 100-150W and 30-50kHz for 3-5 minutes.

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