High-stability super-hydrophobic antireflection transparent coating and preparation method thereof

Abstract

The invention discloses a high-stability super-hydrophobic antireflection transparent coating and a preparation method thereof. The preparation method comprises the following steps: preparing a super-hydrophobic SiO2 ethanol dispersion liquid; a resin / OTS modified SiO2 double-layer coating is prepared; the prepared low surface energy molecular precursors comprise a PDMS gas phase precursor and a silica gel precursor; putting the resin OTS modified SiO2 double-layer coating and a low-surface-energy molecular precursor into a muffle furnace for calcining, naturally cooling to room temperature, and taking out to obtain the high-stability super-hydrophobic antireflection transparent coating. According to the high-stability super-hydrophobic antireflection transparent coating and the preparation method thereof provided by the invention, namely a spraying-calcining method, a nanoscale low-refractive-index porous SiO2 coating can be conveniently constructed, and low-surface-energy oligomer is attached to the surface, so that the contradictory problem that transparency and super-hydrophobicity of the transparent super-hydrophobic coating are difficult to optimize at the same time is solved; in addition, the preparation method is simple and controllable, and lays a foundation for large-area low-cost preparation.

Description

Technical Field

[0001] The present invention relates to the technical field of coating preparation, and in particular to a highly stable super-hydrophobic anti-reflective transparent coating and a preparation method thereof. Background Art

[0002] Transparent super-hydrophobic coatings have attracted widespread attention due to their extremely broad application prospects in the fields of architectural glass, automotive glass, lens glass, solar cells, etc. The transparency and super-hydrophobicity of transparent super-hydrophobic coatings are key technical indicators for their application and scope of application. According to previous studies, the main factors affecting the transparency and super-hydrophobic performance of the coating mainly include the following three aspects: first, the refractive index of the surface coating material. The lower the refractive index, the less light is reflected and the higher the transparency; second, the roughness of the coating surface. The increase in roughness is conducive to increasing super-hydrophobicity, but the increase in roughness will enhance the scattering of light and reduce the transmittance. The third coating thickness, the thinner the thickness, the higher the light transmittance. Generally, the thickness needs to be controlled below one-quarter of the wavelength of visible light. Therefore, for visible light transmission, the thickness needs to be controlled below 70nm, but too thin a thickness is not conducive to improving super-hydrophobic performance. From the above analysis, it can be seen that due to the inconsistent influence of roughness and thickness on the transparency and super-hydrophobicity of the coating, transparent super-hydrophobic coatings have always had the problem of difficulty in optimizing super-hydrophobicity and transparency at the same time.

[0003] In order to solve the above-mentioned technical difficulties and the contradictions that exist, a large number of methods have been developed to prepare transparent super hydrophobic coatings, such as spin coating, dip coating, sol-gel method, chemical vapor deposition, layer-by-layer self-assembly method, etching method, and spraying method. However, spin coating, dip coating, chemical vapor deposition, and layer-by-layer self-assembly method, these methods are complex in process, difficult to prepare on a large scale, and also cannot solve the contradiction that the transparency of transparent super hydrophobic coatings and super hydrophobicity are difficult to optimize at the same time. Although etching can prepare a transparent super hydrophobic coating with excellent transparency and super hydrophobic comprehensive performance, the process is complex, the production cost is high, and it is also difficult to prepare on a large scale, which limits its practical application. And the traditional spraying method prepares a transparent super hydrophobic coating, although the method is simple, the general transparency is low (<90%), and it is difficult to apply in occasions with high transparency requirements. Therefore, how to prepare a transparent super hydrophobic coating with excellent transparency and super hydrophobic comprehensive performance on a large scale at low cost is still one of the most challenging technical problems in this field.

[0004] Therefore, the present invention provides a highly stable super-hydrophobic anti-reflective transparent coating and a preparation method thereof, namely a spraying-calcining method, which can conveniently construct a nano-scale low-refractive index porous SiO2 coating. Summary of the invention

[0005] The purpose of the present invention is to provide a highly stable super-hydrophobic anti-reflective transparent coating and a preparation method thereof, so as to fill the gap in the current technology.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A method for preparing a highly stable super-hydrophobic anti-reflective transparent coating comprises the following steps:

[0008] S1, hydrophobic SiO2 modification:

[0009] Octadecyltrichlorosilane (OTS) was dissolved in anhydrous ethanol, and glacial acetic acid was added for ultrasonic hydrolysis to form solution A; ammonia water was added to deionized water, SiO2 was added, stirred evenly, and then ultrasonic hydrolysis was performed to form solution B; solution A and solution B were mixed and stirred, and the mixture was dispersed in ethanol after centrifugation to form a super-hydrophobic SiO2 ethanol dispersion;

[0010] S2. Preparation of resin / octadecyltrichlorosilane (OTS) modified SiO2 double-layer coating:

[0011] The organic resin is dissolved in an organic solvent to form a resin solution, and a curing agent is added to disperse the solution uniformly to form a resin coating with a solid content of 9 to 11%; the resin coating is first sprayed on a substrate for pre-curing, and then a SiO2 ethanol dispersion is sprayed on the coating, and then the coating is cured by heating and then cured at room temperature;

[0012] S3. Preparation of low surface energy molecular precursors:

[0013] a. Polydimethylsiloxane (PDMS) gas phase precursor:

[0014] Polydimethylsiloxane (PDMS) and a curing agent are mixed in proportion to form n-hexane, which is then sprayed on the surface of a glass sheet, and the sprayed glass sheet is pre-cured before being cured at room temperature;

[0015] b. Silicone gel precursor:

[0016] Add acetic acid aqueous solution, urea and surfactant into a beaker, stir at room temperature for 10 to 12 minutes, add methyltrimethoxysilane (MTMS) and ethyltriethoxysilane (ETEOS) during the process, stir at room temperature for 60 to 70 minutes until a uniform solution is formed; after transferring the obtained solution into a sealed container, move the reaction system into a forced convection oven, and heat at 80°C for 24 to 72 hours until complete gelation and aging; wash the prepared gel product with ethanol for 3 to 4 times, soak and squeeze during the washing process to ensure that the residual impurities are completely removed, and then soak the washed gel product with n-hexane for 3 to 4 times, gently squeeze during the soaking process, and each soaking time is 4 to 6 hours, and then dry at 40 to 45°C for 24 to 28 hours to obtain dry silica gel;

[0017] S4. Calcination of resin / octadecyltrichlorosilane (OTS) modified SiO2 double-layer coating:

[0018] The resin / octadecyltrichlorosilane (OTS) modified SiO2 double-layer coating and the low surface energy molecular precursor are placed in a muffle furnace for calcination, and after naturally cooling to room temperature, the highly stable super hydrophobic anti-reflection transparent coating is taken out to obtain.

[0019] Preferably, in step S1, the ultrasonic hydrolysis is performed for 45 to 60 minutes to form solution A; SiO2 is added and stirred evenly, and then ultrasonic hydrolysis is performed for 10 to 20 minutes; solution A and solution B are mixed at 75 to 80° C. and stirred for 6 to 8 hours; the concentration of the superhydrophobic SiO2 ethanol dispersion is 15 μg / ml.

[0020] Preferably, in step S2, the organic resin is selected from one of epoxy resin, polydimethylsiloxane (PDMS), acrylic resin and polyurethane.

[0021] Preferably, in step S2, the organic solvent is selected from one of xylene, ethyl acetate, butyl acetate, acetone, tetrahydrofuran and cyclohexane.

[0022] Preferably, in step S2, the resin coating is sprayed on the substrate, the substrate is glass or metal, and the spraying amount of the sprayed resin coating is 0.02 g / cm 2 After pre-curing at 80-85°C for 40-50 minutes, the coating is sprayed with SiO2 ethanol dispersion at a spraying amount of 0.0072 g / cm 2 , cure at 80-85℃ for 5-10 minutes and then cure at room temperature for 24-28 hours.

[0023] Preferably, in step S3-a, the polydimethylsiloxane (PDMS) and the curing agent are mixed at a mass ratio of 8 to 10:1, and the sprayed glass sheet is pre-cured at 80 to 85° C. for 40 to 50 minutes and then cured at room temperature for 24 to 28 hours.

[0024] Preferably, in step S3-b, the surfactant is cetyltrimethylammonium chloride (CTAC) or cetyltrimethylammonium bromide (CTAB).

[0025] Preferably, in step S4, the calcination is carried out in the muffle furnace at 500-650° C. for 40-60 min; and the heating rate is 17-19° C. / min.

[0026] Preferably, in step S4, the equivalent ratio of the low surface energy molecular precursor to the resin / octadecyltrichlorosilane (OTS) modified SiO2 double-layer coating is >0.7.

[0027] The present application also claims protection for a highly stable super hydrophobic anti-reflective transparent coating, which is prepared by the above-mentioned method for preparing the highly stable super hydrophobic anti-reflective transparent coating.

[0028] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0029] The highly stable super-hydrophobic anti-reflective transparent coating and its preparation method, namely the spray-calcination method, provided by the present invention can conveniently construct a nano-scale low-refractive-index porous SiO2 coating, and at the same time, a low-surface-energy oligomer is attached to the surface, which not only solves the contradictory problem that the transparency and super-hydrophobicity of the transparent super-hydrophobic coating are difficult to optimize at the same time, but also the preparation method is simple and controllable, laying a foundation for its large-scale and low-cost preparation. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, a specific implementation scheme is now described in detail.

[0031] The present invention is further described below in conjunction with the embodiments, but the present invention is not limited to the following embodiments. The implementation conditions used in the embodiments can be further adjusted according to the different requirements of specific use, and the implementation conditions not indicated are conventional conditions in the industry. The technical features involved in each embodiment of the present invention can be combined with each other as long as they do not conflict with each other.

[0032] Example 1

[0033] This embodiment provides a highly stable super-hydrophobic anti-reflective transparent coating and a preparation method thereof, comprising the following steps:

[0034] S1, hydrophobic SiO2 modification:

[0035] 1 ml OTS was dissolved in 60 ml anhydrous ethanol, and 5 ml glacial acetic acid was added for ultrasonic hydrolysis for 45 min to form solution A; 4 ml ammonia water was added to 20 ml deionized water, and 3 g SiO2 was added and stirred evenly, and then ultrasonic hydrolysis was performed for 10 min to form solution B; solution A and solution B were mixed and stirred at 75 ° C for 6 h, and the mixture was centrifuged and dispersed in 200 ml ethanol to form a superhydrophobic SiO2 ethanol dispersion (15 μg / ml);

[0036] S2. Preparation of resin / OTS modified SiO2 double-layer coating:

[0037] The epoxy resin was dissolved in tetrahydrofuran to form a resin solution, and the curing agent D230 was added and dispersed evenly to form a resin coating with a solid content of 10%; the above resin coating was first sprayed on the glass (the spraying amount of the sprayed resin coating was 0.02g / cm 2) After pre-curing at 80°C for 40 minutes, the coating was sprayed with SiO2 ethanol dispersion (the spraying amount of SiO2 ethanol dispersion was 0.0072 g / cm 2 ) and then cured at 80°C for 5 minutes and then cured at room temperature for 24 hours;

[0038] S3. Preparation of low surface energy molecular precursors:

[0039] a. PDMS gas phase precursor:

[0040] 1g PDMS was mixed with curing agent at a mass ratio of 10:1 to form n-hexane, which was then sprayed on the surface of the glass sheet. The sprayed glass sheet was pre-cured at 80°C for 40 minutes and then cured at room temperature for 24 hours.

[0041] b. Silicone gel precursor:

[0042] Aqueous acetic acid solution (15 ml, 5 mmol), 5.0 g urea and 0.80 g surfactant CTAC were added to a beaker and stirred vigorously at room temperature for 10 min. During this period, 3.0 ml MTMS and 3.0 ml ethyltriethoxysilane were added and stirred vigorously at room temperature for 60 min until a uniform solution was formed; after the obtained solution was transferred to a sealed container, the reaction system was moved to a forced convection oven and heated at 80°C for 48 h until complete gelation and aging; the prepared gel product was washed with ethanol for 3 times, soaked and squeezed during the washing process to ensure that the residual impurities were completely removed, and then the washed gel product was soaked in n-hexane for 3 times, gently squeezed several times during the soaking process, and each soaking time was 4 h, and then dried at 40°C for 24 h to obtain dry silica gel;

[0043] S4. Calcination of resin / OTS modified SiO2 double-layer coating:

[0044] The resin / OTS modified SiO2 double-layer coating and the low surface energy molecular precursor are placed in a muffle furnace and calcined at 500°C for 40 minutes (the equivalent ratio of the low surface energy molecular precursor to the resin / OTS modified SiO2 double-layer coating is >0.7), and the heating rate is 17°C / min; after naturally cooling to room temperature, the highly stable super hydrophobic anti-reflective transparent coating is taken out.

[0045] Example 2

[0046] This embodiment provides a highly stable super-hydrophobic anti-reflective transparent coating and a preparation method thereof, comprising the following steps:

[0047] S1, hydrophobic SiO2 modification:

[0048] 1 ml OTS was dissolved in 60 ml anhydrous ethanol, and 5 ml glacial acetic acid was added for ultrasonic hydrolysis for 45 min to form solution A; 4 ml ammonia water was added to 20 ml deionized water, and 3 g SiO2 was added and stirred evenly, and then ultrasonic hydrolysis was performed for 10 min to form solution B; solution A and solution B were mixed and stirred at 75 ° C for 6 h, and the mixture was centrifuged and dispersed in 200 ml ethanol to form a superhydrophobic SiO2 ethanol dispersion (15 μg / ml);

[0049] S2. Preparation of resin / OTS modified SiO2 double-layer coating:

[0050] The epoxy resin was dissolved in tetrahydrofuran to form a resin solution, and the curing agent D230 was added and dispersed evenly to form a resin coating with a solid content of 10%; the above resin coating was first sprayed on the glass (the spraying amount of the sprayed resin coating was 0.02g / cm 2 ) After pre-curing at 80°C for 40 minutes, the coating was sprayed with SiO2 ethanol dispersion (the spraying amount of SiO2 ethanol dispersion was 0.0072 g / cm 2 ) and then cured at 80°C for 5 minutes and then cured at room temperature for 24 hours;

[0051] S3. Preparation of low surface energy molecular precursors:

[0052] a. PDMS gas phase precursor:

[0053] 1g PDMS and curing agent were mixed in a mass ratio of 9:1 to form n-hexane, which was then sprayed on the surface of the glass sheet. The sprayed glass sheet was pre-cured at 80°C for 40 minutes and then cured at room temperature for 24 hours.

[0054] b. Silicone gel precursor:

[0055] Aqueous acetic acid solution (15 ml, 5 mmol), 5.0 g urea and 0.80 g surfactant CTAC were added to a beaker and stirred vigorously at room temperature for 10 min. During this period, 3.0 ml MTMS and 3.0 ml ethyltriethoxysilane were added and stirred vigorously at room temperature for 60 min until a uniform solution was formed; after the obtained solution was transferred to a sealed container, the reaction system was moved to a forced convection oven and heated at 80°C for 48 h until complete gelation and aging; the prepared gel product was washed with ethanol for 3 times, soaked and squeezed during the washing process to ensure that the residual impurities were completely removed, and then the washed gel product was soaked in n-hexane for 3 times, gently squeezed several times during the soaking process, and each soaking time was 4 h, and then dried at 40°C for 24 h to obtain dry silica gel;

[0056] S4. Calcination of resin / OTS modified SiO2 double-layer coating:

[0057] The resin / OTS modified SiO2 double-layer coating and the low surface energy molecular precursor are placed in a muffle furnace and calcined at 500°C for 40 minutes (the equivalent ratio of the low surface energy molecular precursor to the resin / OTS modified SiO2 double-layer coating is >0.7), and the heating rate is 17°C / min; after naturally cooling to room temperature, the highly stable super hydrophobic anti-reflective transparent coating is taken out.

[0058] Example 3

[0059] This embodiment provides a highly stable super-hydrophobic anti-reflective transparent coating and a preparation method thereof, comprising the following steps:

[0060] S1, hydrophobic SiO2 modification:

[0061] 1 ml OTS was dissolved in 60 ml anhydrous ethanol, and 5 ml glacial acetic acid was added for ultrasonic hydrolysis for 45 min to form solution A; 4 ml ammonia water was added to 20 ml deionized water, and 3 g SiO2 was added and stirred evenly, and then ultrasonic hydrolysis was performed for 10 min to form solution B; solution A and solution B were mixed and stirred at 75 ° C for 6 h, and the mixture was centrifuged and dispersed in 200 ml ethanol to form a superhydrophobic SiO2 ethanol dispersion (15 μg / ml);

[0062] S2. Preparation of resin / OTS modified SiO2 double-layer coating:

[0063] The epoxy resin was dissolved in tetrahydrofuran to form a resin solution, and the curing agent D230 was added and dispersed evenly to form a resin coating with a solid content of 10%; the above resin coating was first sprayed on the glass (the spraying amount of the sprayed resin coating was 0.02g / cm 2 ) After pre-curing at 80°C for 40 minutes, the coating was sprayed with SiO2 ethanol dispersion (the spraying amount of SiO2 ethanol dispersion was 0.0072 g / cm 2 ) and then cured at 80°C for 5 minutes and then cured at room temperature for 24 hours;

[0064] S3. Preparation of low surface energy molecular precursors:

[0065] a. PDMS gas phase precursor:

[0066] 1g PDMS and curing agent were mixed in a mass ratio of 8:1 to form n-hexane, which was then sprayed on the surface of the glass sheet. The sprayed glass sheet was pre-cured at 80°C for 40 minutes and then cured at room temperature for 24 hours.

[0067] b. Silicone gel precursor:

[0068] Aqueous acetic acid solution (15 ml, 5 mmol), 5.0 g urea and 0.80 g surfactant CTAC were added to a beaker and stirred vigorously at room temperature for 10 min. During this period, 3.0 ml MTMS and 3.0 ml ethyltriethoxysilane were added and stirred vigorously at room temperature for 60 min until a uniform solution was formed; after the obtained solution was transferred to a sealed container, the reaction system was moved to a forced convection oven and heated at 80°C for 48 h until complete gelation and aging; the prepared gel product was washed with ethanol for 3 times, soaked and squeezed during the washing process to ensure that the residual impurities were completely removed, and then the washed gel product was soaked in n-hexane for 3 times, gently squeezed several times during the soaking process, and each soaking time was 4 h, and then dried at 40°C for 24 h to obtain dry silica gel;

[0069] S4. Calcination of resin / OTS modified SiO2 double-layer coating:

[0070] The resin / OTS modified SiO2 double-layer coating and the low surface energy molecular precursor are placed in a muffle furnace and calcined at 500°C for 40 minutes (the equivalent ratio of the low surface energy molecular precursor to the resin / OTS modified SiO2 double-layer coating is >0.7), and the heating rate is 17°C / min; after naturally cooling to room temperature, the highly stable super hydrophobic anti-reflective transparent coating is taken out.

[0071] Example 4

[0072] This embodiment is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0073] In this embodiment, the amount of ethyltriethoxysilane added in step S3-b is 2.0 ml.

[0074] Example 5

[0075] This embodiment is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0076] In this embodiment, the amount of ethyltriethoxysilane added in step S3-b is 1.0 ml.

[0077] Example 6

[0078] This embodiment is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0079] In this embodiment, in step S4, the calcination is performed at 550° C. for 40 min in the muffle furnace.

[0080] Example 7

[0081] This embodiment is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0082] In this embodiment, in step S4, the calcination is performed at 650° C. for 40 min in the muffle furnace.

[0083] Comparative Example 1

[0084] This comparative example is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0085] In this comparative example, ethyltriethoxysilane was not added in step S3-b.

[0086] Comparative Example 2

[0087] This comparative example is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0088] In this comparative example, in step S3-a, PDMS and curing agent are mixed at a mass ratio of 7:1.

[0089] Comparative Example 3

[0090] This comparative example is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0091] In this comparative example, in step S3-a, PDMS and curing agent are mixed at a mass ratio of 11:1.

[0092] Comparative Example 4

[0093] This comparative example is carried out on the basis of the above-mentioned embodiment 1, and the similarities with the above-mentioned embodiment are not repeated here.

[0094] In this comparative example, in step S4, the calcination is performed at 400° C. for 40 min in the muffle furnace.

[0095] It has been tested that the high-stable super-hydrophobic anti-reflective transparent coating prepared according to the method and conditions of the present invention has better performance.

[0096] In summary, the highly stable super-hydrophobic anti-reflective transparent coating and its preparation method, namely the spray-calcination method, provided by the present invention can conveniently construct a nano-scale low-refractive-index porous SiO2 coating, and at the same time, a low-surface-energy oligomer is attached to the surface, which not only solves the contradictory problem that the transparency and super-hydrophobicity of the transparent super-hydrophobic coating are difficult to optimize at the same time, but also the preparation method is simple and controllable, laying the foundation for its large-scale and low-cost preparation.

[0097] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for preparing a highly stable super-hydrophobic anti-reflective transparent coating, characterized in that: The following steps are involved: S1, hydrophobic SiO2 modification: Octadecyltrichlorosilane is dissolved in anhydrous ethanol, and glacial acetic acid is added for ultrasonic hydrolysis to form solution A; aqueous ammonia is added to deionized water, SiO2 is added, stirred evenly, and then ultrasonic hydrolysis is performed to form solution B; solution A and solution B are mixed and stirred, and the mixture is dispersed in ethanol after centrifugation to form a super-hydrophobic SiO2 ethanol dispersion; S2. Preparation of resin / octadecyltrichlorosilane modified SiO2 double-layer coating: The organic resin is dissolved in an organic solvent to form a resin solution, and a curing agent is added to disperse the solution uniformly to form a resin coating with a solid content of 9 to 11%; the resin coating is first sprayed on a substrate for pre-curing, and then a SiO2 ethanol dispersion is sprayed on the coating, and then the coating is cured by heating and then cured at room temperature; S3. Preparation of low surface energy molecular precursors: a. Polydimethylsiloxane gas phase precursor: Polydimethylsiloxane and curing agent are mixed in proportion to form n-hexane, which is then sprayed on the surface of the glass sheet, and the sprayed glass sheet is pre-cured and then cured at room temperature; b. Silicone gel precursor: Add acetic acid aqueous solution, urea and surfactant into a beaker, stir at room temperature for 10 to 12 minutes, add methyltrimethoxysilane and ethyltriethoxysilane, and stir at room temperature for 60 to 70 minutes until a uniform solution is formed; After transferring the obtained solution into a sealed container, the reaction system is moved into a forced convection oven and heated at 80°C for 24 to 72 hours until it is completely gelled and aged; the prepared gel product is washed with ethanol for 3 to 4 times, soaked and squeezed during the washing period, and then the washed gel product is soaked with n-hexane for 3 to 4 times, gently squeezed during the soaking period, and each soaking time is 4 to 6 hours, and then dried at 40 to 45°C for 24 to 28 hours to obtain dry silica gel; S4. Calcination of resin / octadecyltrichlorosilane modified SiO2 double-layer coating: The resin / octadecyltrichlorosilane modified SiO2 double-layer coating and the low surface energy molecular precursor are placed in a muffle furnace for calcination, and after naturally cooling to room temperature, the highly stable super hydrophobic anti-reflection transparent coating is taken out to obtain.

2. The method for preparing a highly stable super-hydrophobic anti-reflective transparent coating according to claim 1, characterized in that: In step S1, the ultrasonic hydrolysis is performed for 45 to 60 minutes to form solution A; SiO2 is added and stirred evenly, and then ultrasonic hydrolysis is performed for 10 to 20 minutes; solution A and solution B are mixed at 75 to 80°C and stirred for 6 to 8 hours; the concentration of the superhydrophobic SiO2 ethanol dispersion is 15 μg / ml.

3. The method for preparing a highly stable super-hydrophobic anti-reflective transparent coating according to claim 1, characterized in that: In step S2, the organic resin is selected from one of epoxy resin, polydimethylsiloxane, acrylic resin and polyurethane.

4. The method for preparing a highly stable super-hydrophobic anti-reflective transparent coating according to claim 1, characterized in that: In step S2, the organic solvent is selected from one of xylene, ethyl acetate, butyl acetate, acetone, tetrahydrofuran, and cyclohexane.

5. The method for preparing a highly stable super-hydrophobic anti-reflective transparent coating according to claim 1, characterized in that: In step S2, the resin coating is sprayed on the substrate, the substrate is glass or metal, and the spraying amount of the sprayed resin coating is 0.02g / cm 2 After pre-curing at 80-85°C for 40-50 minutes, the coating is sprayed with SiO2 ethanol dispersion at a spraying amount of 0.0072 g / cm 2 , cure at 80-85℃ for 5-10 minutes and then cure at room temperature for 24-28 hours.

6. The method for preparing a highly stable super-hydrophobic anti-reflective transparent coating according to claim 1, characterized in that: In step S3-a, the polydimethylsiloxane and the curing agent are mixed at a mass ratio of 8 to 10:1, and the sprayed glass sheet is pre-cured at 80 to 85°C for 40 to 50 minutes and then cured at room temperature for 24 to 28 hours.

7. The method for preparing a highly stable super-hydrophobic anti-reflective transparent coating according to claim 1, characterized in that: In step S3-b, the surfactant is hexadecyltrimethylammonium chloride or hexadecyltrimethylammonium bromide.

8. The method for preparing a highly stable super-hydrophobic anti-reflective transparent coating according to claim 1, characterized in that: In step S4, the calcination is carried out in the muffle furnace at 500-650° C. for 40-60 min; the heating rate is 17-19° C. / min.

9. The method for preparing a highly stable super-hydrophobic anti-reflective transparent coating according to claim 1, characterized in that: In step S4, the equivalent ratio of the low surface energy molecular precursor to the resin / octadecyltrichlorosilane modified SiO2 double-layer coating is greater than 0.

7.

10. A highly stable super-hydrophobic anti-reflective transparent coating, characterized in that: The highly stable super-hydrophobic anti-reflective transparent coating is prepared by the preparation method according to any one of claims 1 to 9.