A preparation method and application of super hydrophobic transparent glass

Abstract

The present invention belongs to the technical field of superhydrophobic glass, and particularly relates to a preparation method and application of superhydrophobic transparent glass. The preparation method of the superhydrophobic transparent glass comprises the following steps: first, dip-coating is carried out to obtain a PDMS-SiO2 coating, then, it is treated by a soot template process, and then placed in a muffle furnace for high-temperature annealing, and naturally cooled to room temperature to obtain a sample. Finally, an HDTMS solution is sprayed on the surface of the sample, cured at room temperature and then put into an oven for drying to obtain the superhydrophobic transparent glass. The surface of the super-transparent glass prepared by the preparation method of the present invention has a porous network micro-nano composite structure, so that the super-transparent glass has excellent light transmittance, superhydrophobicity and self-cleaning property. The process of the present invention is simple. When it is used to manufacture solar panels, it can improve the power generation efficiency of the solar panels, thereby improving the solar energy utilization rate.

Description

Technical Field

[0001] The invention belongs to the technical field of super-hydrophobic glass, and in particular relates to a preparation method of super-hydrophobic transparent glass and application thereof. Background Art

[0002] Super-hydrophobicity refers to a phenomenon in which water droplets are spherical on the surface, with a contact angle greater than 150° and a rolling contact angle less than 10°. According to its properties, researchers believe that it has great potential applications in production and life, such as self-cleaning, anti-corrosion, antibacterial, waterproof, fluid transportation, etc. Especially in recent years, with the development of solar photovoltaic power generation technology, a major difficulty for solar photovoltaic glass cover is that its surface is easy to adhere to dust and fog, which will greatly reduce the power generation efficiency of solar cells. The development of transparent super-hydrophobic coatings can just solve this major pain point problem, and the self-cleaning performance of super-hydrophobic coatings is perfectly applied. Therefore, many researchers are currently conducting transparent functional research on super-hydrophobic self-cleaning coatings, which will reduce the cleaning cost of solar cells and effectively improve the photoelectric conversion efficiency of solar cells. We know that the hydrophobicity of the material surface is determined by the contact ability of the liquid and the solid, and whether the material surface is hydrophobic depends on the surface free energy and the roughness of the surface. Therefore, to obtain a super-hydrophobic surface, it can be achieved by using low surface energy materials to construct a rough material surface or increasing the surface structure roughness of low surface energy materials.

[0003] However, the key issues currently faced in the preparation of transparent super-hydrophobic coatings are: ① The roughness and transparency of the material surface are a pair of competing properties. The increased roughness brings about stronger hydrophobicity, but the increased roughness of the material surface will also lead to enhanced light scattering, which will lead to a decrease in material transparency; ② The stability of use of transparent super-hydrophobic materials, that is, the service life problem. Currently, most transparent super-hydrophobic material surfaces do not have long-term cleaning stability, which limits the promotion of their practical applications.

[0004] Therefore, to prepare a transparent and stable super-hydrophobic coating, it is necessary to weigh the three properties of hydrophobicity, namely roughness, transparency, and stability. In terms of transparency and hydrophobicity, it is necessary to coordinate the roughness to achieve a balance between the two properties. In terms of stability, it is necessary to find a suitable intermediate to connect the hydrophobic surface structure or directly construct a suitable surface structure through high-precision technology to achieve it. The development of this technology will bring great changes to production and life, so the research work of coordinating and balancing the hydrophobicity, transparency, and stability of transparent super-hydrophobic coatings is of great significance.

[0005] Reference 1 (Chem. Soc. Rev., 2021, 50, 4031) Yi Lin et al. reported a new method to provide basic roughness by using ultrafast laser direct writing of dispersed micro-pit arrays, ensuring sufficient unprocessed surface area to obtain high transparency, introducing multiple laser processes in each pit to induce maximum nanostructure roughness, and then coating the surface with a layer of fluoroalkyl silane molecules to achieve good superhydrophobicity. However, this method uses toxic fluorination treatment, and the fluorination modification method is basically inconsistent with the requirements of sustainable development.

[0006] Document 2 (Applied Surface Science, 407, 2017, 526-531) Zhang et al. used a layer of soot uniformly coated on glass as a template, and deposited SiO2 obtained by catalysis of TEOS under alkaline conditions on the glass coated with soot by chemical vapor deposition (CVD) to obtain a fibrous SiO2 network structure. Then, after high-temperature treatment, it was immersed in a fluorosilane solution for hydrophobic treatment to obtain a super-hydrophobic coating with a visible light transmittance of 88% and a static water contact angle of 166°.

[0007] Document 3 (Journal of Applied Polymer Science, 2017, 134(13): 105-113.) Sun et al. used a template method, using the lotus leaf surface as a template and pouring polydimethylsiloxane (PDMS), removing the lotus leaf template after complete curing, and the microstructure of the obtained PDMS film surface is complementary to the microstructure of the lotus leaf surface, and then repeating the above steps with the PDMS film as a template to obtain a PDMS super-hydrophobic film imitating a lotus leaf. This method is complicated and time-consuming.

[0008] Document 4 (Journal of Colloid and Interface Science, 2016, 481: 82-90.) Daniel et al. used a mixed gas of O2 / CF4 to perform deep reactive ion etching (DRIE) on a PDMS substrate. When etching was completed for 15 minutes, the roughness of the coating reached 126 nm, the transmittance was >85%, and the contact angle reached 153°. At 20 minutes and 25 minutes, the coating roughness was 207 nm and 302 nm, respectively, and the sample became opaque. Therefore, as the surface roughness increases, the transmittance decreases. This method has high preparation costs, is not environmentally friendly, and cannot balance roughness and transmittance well. Summary of the invention

[0009] In view of the problems existing in the prior art, the invention aims to provide a method for preparing super-hydrophobic transparent glass, which can better balance the surface roughness and transparency of the glass, and is simple to operate and use simple equipment. The prepared super-hydrophobic transparent glass is used to manufacture solar panels, which can improve the power generation efficiency of solar panels, thereby improving the utilization rate of solar energy.

[0010] To achieve the above object, the present invention provides a method for preparing super-hydrophobic transparent glass, comprising the following steps:

[0011] a) Preparation of superwetting surface: First, polydimethylsiloxane (PDMS) and dibutyltin dilaurate (DBTDL) are added to n-hexane to obtain a PDMS solution. Then, TEOS is added dropwise to the PDMS solution and stirred to mix evenly. A PDMS-SiO2 solution is obtained. Then, the glass sheet is ultrasonically cleaned in water and anhydrous ethanol in turn and then dried. Next, the dried glass sheet is dipped in the PDMS-SiO2 solution for multiple times, with an interval of 1 minute between each dip, to obtain a PDMS-SiO2 sample. Subsequently, the PDMS-SiO2 sample is slowly, evenly and steadily moved horizontally through the top of the flame for a period of time, and soot is deposited on the surface of the sample until it is completely black to obtain a PDMS-SiO2-CS sample. Finally, the PDMS-SiO2-CS sample is placed in a muffle furnace for high temperature annealing, and the annealed sample is naturally cooled to room temperature to obtain a PDMS(O)-SiO2-CS sample.

[0012] b) preparing hexadecyltrimethoxysilane (HDTMS) solution: respectively measure HDTMS, ultrapure water and anhydrous ethanol, mix them, stir them evenly after ultrasonic treatment, and refrigerate them at 7-8°C.

[0013] c) using a spray pot to spray the HDTMS solution obtained in step b) onto the surface of the PDMS(O)-SiO2-CS sample obtained in step a), and after curing at room temperature, putting it into an oven for drying to obtain a PDMS(O)-SiO2-CS-HDTMS sample, i.e., the super hydrophobic transparent glass.

[0014] Preferably, in step a), the duration is 30 seconds; the mass ratio of PDMS:DBTDL:TEOS is 5-1:0.1:1, more preferably, the mass ratio is 4:0.1:1. The solid-liquid ratio of PDMS:n-hexane is 5-1 g:120 mL; more preferably, the solid-liquid ratio of PDMS:n-hexane is 4 g:120 mL; the stirring time is not less than 1 hour, and the dipping is performed for not less than 3 times; more preferably, the stirring time is 1 hour, and the dipping is performed for 3 times.

[0015] Preferably, the annealing temperature in the muffle furnace in step a) is 400°C to 550°C, and the annealing time is not less than 3 hours; more preferably, the annealing temperature is 500°C.

[0016] Preferably, in step b), the volume ratio of HDTMS: ultrapure water: anhydrous ethanol is 3:10:87; the ultrasonic time is not less than 1 hour, and the stirring time is not less than 5 hours.

[0017] Preferably, in the step c), the number of spraying is 1 to 4 times, the room temperature curing time is not less than 10 minutes, the drying temperature is not less than 120° C. and the time is not less than 2 hours; more preferably, the number of spraying is 2 times.

[0018] The present invention also provides the use of the super-hydrophobic glass obtained by the preparation method of the super-hydrophobic transparent glass in the manufacture of solar panels. The super-hydrophobic and transparent glass is conducive to improving the efficiency of photovoltaic power generation.

[0019] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0020] (1) This preparation method can better balance the surface roughness and transparency of the glass, and is simple to operate and requires simple equipment.

[0021] (2) This material is used in solar panels to improve the power generation efficiency of solar panels and achieve increased energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the effect of the mass ratio of PDMS to TEOS on the contact angle of the coating in Example 1.

[0023] Figure 2 This is the effect of the mass ratio of PDMS to TEOS on the light transmittance of the coating in Example 1.

[0024] Figure 3 Comparison of contact angles of the coating before and after HDTMS solution spraying after muffle furnace annealing in Example 1.

[0025] Figure 4 This is the effect of muffle furnace annealing temperature on the transmittance of the coating.

[0026] Figure 5 This is the effect of the number of times the HDTMS solution is sprayed on the contact angle and transmittance of the coating.

[0027] Figure 6 Schematic diagram of the coating's self-cleaning performance.

[0028] Figure 7 Schematic diagram of the chemical resistance of the coating.

[0029] Figure 8 Schematic diagram of the UV resistance of the coating.

[0030] Fig. 9 Schematic diagram of coating adhesion performance.

[0031] Fig.10 Schematic diagram of photovoltaic module output characteristics.

[0032] Fig.11 These are the SEM images of the PDMS-SiO2 sample, PDMS-SiO2-CS sample, PDMS(O)-SiO2-CS sample, PDMS(O)-SiO2-CS-HDTMS sample obtained in each step of the preparation process of PDMS(O)-SiO2-CS-HDTMS sample B in Example 1, as well as the SEM image of the cross-section of the PDMS(O)-SiO2-CS sample and the coating in the cross-section.

[0033] Fig.12 Comparison of the contact angle and transmittance of sample DB obtained in comparative example 1 and PDMS(O)-SiO2-CS-HDTMS sample B in example 1.

[0034] Fig.13 The DB SEM image of the sample obtained in Comparative Example 1 and its cross-sectional SEM image are shown.

[0035] Fig.14 The present invention is a schematic diagram of the process of preparing the super-hydrophobic transparent glass. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments, which are only used to illustrate the present invention and should not be construed as limiting the present invention.

[0037] The ethanol used in the following examples is anhydrous ethanol. Normal temperature and room temperature both refer to 25°C.

[0038] Example 1

[0039] A method for preparing super-hydrophobic transparent glass comprises the following steps:

[0040] a) First, 4 g of polydimethylsiloxane (PDMS) and 0.1 g of dibutyltin dilaurate (DBTDL) were added to 120 mL of n-hexane to obtain a PDMS solution; then, 1 g of TEOS was added dropwise to the PDMS solution and stirred for 1 hour to obtain a PDMS-SiO2 solution. Then, the glass slide was ultrasonically cleaned in water and ethanol in turn and then dried. Next, the dried glass slide was dipped in the PDMS-SiO2 solution three times, with an interval of one minute between each dip, to obtain a PDMS-SiO2 sample. Subsequently, the PDMS-SiO2 sample was slowly, evenly, and steadily moved horizontally across the top of the flame, and the sample was moved back and forth for 30 seconds. Soot was deposited on the surface of the sample until it was completely black to obtain a PDMS-SiO2-CS sample. Finally, the PDMS-SiO2 sample was annealed in a muffle furnace at 500°C for 3 hours. The annealed sample was naturally cooled to room temperature to obtain a PDMS(O)-SiO2-CS sample.

[0041] b) Preparation of hexadecyltrimethoxysilane (HDTMS) solution: HDTMS: ultrapure water: ethanol = 3:10:87 by volume, ultrasonically treat for 1 hour, stir for 5 hours, and refrigerate in a refrigerator at 7-8°C.

[0042] c) Using a spray pot, spray the HDTMS solution obtained in step b) onto the surface of the PDMS(O)-SiO2-CS sample obtained in step a) twice, cure at room temperature for 10 min, and then put it into an oven and dry it at 120° C. for 2 h to obtain the super-hydrophobic transparent glass, which is recorded as PDMS(O)-SiO2-CS-HDTMS sample B.

[0043] The above preparation process was repeated. Except that the masses of PDMS and TEOS were 5 g and 1 g, 3 g and 1 g, 2 g and 1 g, and 1 g and 1 g, respectively, the rest of the process was the same to obtain PDMS(O)-SiO2-CS-HDTMS samples A, C, D, and E, respectively.

[0044] The obtained PDMS(O)-SiO2-CS-HDTMS samples A, B, C, D, and E were taken to test their contact angles and transmittances. The transmission spectra were recorded in the wavelength range of 300-800 nm using a UV-visible spectrophotometer. The static water contact angle (WCA) of a 10 μL water droplet was measured using a contact angle meter. The WCA test results are shown in Figure 2. Figure 1 As shown. When the mass of PDMS decreases, that is, the mass ratio of PDMS to TEOS decreases, the contact angle increases first and then decreases. When the mass ratio of PDMS to TEOS is 4:1, the contact angle of the coating is the highest, reaching 166.8°. Comparing the contact angles of the coating after muffle furnace annealing and before and after the HDTMS solution spraying in step c), as shown Figure 3As shown in the figure, the contact angle of the coating before spraying is 120°, and the contact angle of the coating after spraying reaches 166.8°. Correspondingly, the coating transmittance of PDMS(O)-SiO2-CS-HDTMS samples A, B, C, D, and E is shown in Figure 2 As shown, when the masses of PDMS and TEOS are 1g and 1g respectively, the transmittance is the highest, but the WCA is too low. When the masses are 3g and 1g, the transmittance is the lowest. Considering WCA and transmittance comprehensively, when the masses of PDMS and TEOS are 4g and 1g respectively, the transmittance is greater than 85% and the contact angle reaches 166.8°.

[0045] Example 2

[0046] This example illustrates the effect of muffle furnace annealing temperature (400° C. to 550° C.) on the contact angle of a super-hydrophobic transparent glass coating.

[0047] a) 4 g of polydimethylsiloxane (PDMS) and 0.1 g of dibutyltin dilaurate (DBTDL) were first added to 120 mL of n-hexane to obtain a PDMS solution; 1 g of TEOS was then added dropwise to the PDMS solution and stirred for 1 hour to obtain a PDMS-SiO2 solution. Then, the glass slide was ultrasonically cleaned in water and ethanol and dried. Next, the dried glass slide was dipped three times in the PDMS-SiO2 solution, with an interval of one minute between each dip, to obtain a PDMS-SiO2 sample. Subsequently, the PDMS-SiO2 sample was slowly, evenly, and steadily moved horizontally across the top of the flame, moving the sample back and forth until the sample surface completely blackened to obtain a PDMS-SiO2-CS sample. Finally, the PDMS-SiO2 sample was annealed in a muffle furnace at 400°C for 3 hours. The annealed sample was naturally cooled to room temperature to obtain a PDMS(O)-SiO2-CS sample TD.

[0048] b) Prepare hexadecyltrimethoxysilane (HDTMS) solution: HDTMS: ultrapure water: ethanol = 3:10:87, mix, ultrasonicate for 1 h, stir for 5 h, and put into refrigerator for refrigeration.

[0049] c) Using a spray pot, spray the HDTMS solution obtained in step b) onto the surface of the PDMS(O)-SiO2-CS sample obtained in step a), and after curing at room temperature for 10 min, put it into an oven and dry it at 120° C. for 2 h to obtain the super-hydrophobic transparent glass, which is recorded as PDMS(O)-SiO2-CS-HDTMS sample TD.

[0050] The above preparation process was repeated, except that the annealing temperature in the muffle furnace in step a) was replaced with 450° C. and 550° C. respectively. The rest of the process was the same to obtain PDMS(O)-SiO2-CS-HDTMS samples TC and TA respectively.

[0051] Take the obtained PDMS(O)-SiO2-CS-HDTMS samples TA, B, TC, and TD and test their transmittance. The test results are as follows: Figure 4 As shown in the figure, the annealing temperature is too low, the soot on the glass surface is not completely removed, resulting in low transmittance. When the temperature reaches 500°C, the transmittance reaches 87.9%. When the temperature reaches 550°C, the transmittance and contact angle do not change much, so 500°C is selected as the annealing temperature.

[0052] Example 3

[0053] This example illustrates the effect of the number of times the HDTMS solution is sprayed on the contact angle of the coating.

[0054] The preparation process of PDMS(O)-SiO2-CS-HDTMS sample B in Example 1 was repeated, except that the number of spraying times of HDTMS solution in step c) was replaced with 1, 3, and 4 times respectively. The rest of the process was the same to obtain PDMS(O)-SiO2-CS-HDTMS samples SC, SD, and SE in turn.

[0055] Test the transmittance of PDMS(O)-SiO2-CS-HDTMS samples B, SC, SD, and SE. The test results are as follows: Figure 5 As shown in the figure, as the number of spraying times increases, the contact angle of the coating does not change much, but the transmittance decreases sharply. Considering the transmittance and uniformity of the coating, spraying twice is selected.

[0056] Example 4

[0057] This example illustrates the self-cleaning properties, durability, mechanical stability, and photovoltaic module output characteristics of superhydrophobic transparent glass.

[0058] Self-cleaning experiment

[0059] A self-cleaning experiment was carried out using the PDMS(O)-SiO2-CS-HDTMS sample B obtained in Example 1. Figure 6 It shows that when a water droplet rolls over the coating on the surface, the pollutants placed on the coating (left picture) are carried away by the water droplet, and the rolling path of the water droplet appears clean (right picture), indicating that the coating has good self-cleaning properties.

[0060] Acid and alkali resistance test

[0061] The PDMS(O)-SiO2-CS-HDTMS sample B obtained in Example 1 was used for acid and alkali resistance test. Sample B was immersed in 1 mol / L hydrochloric acid solution and 1 mol / L sodium hydroxide solution for 24 hours respectively. The contact angle changes before and after immersion are shown in Figure 2. Figure 7Whether in a strongly alkaline environment or a strongly acidic environment, the coating surface can still maintain good superhydrophobic properties. From the above tests, it can be known that the coating prepared by the preparation method of the present invention exhibits strong corrosion resistance in different pH environments, which will provide excellent protection for solar cells in harsh environments.

[0062] UV resistance test

[0063] The PDMS(O)-SiO2-CS-HDTMS sample B obtained in Example 1 was used for the anti-ultraviolet experiment. Sample B was placed under an ultraviolet lamp (365 nm, 5.0 ± 0.6 mW cm -2 ) irradiation, the UV lamp is kept just above the coating of sample B, and the water contact angle is measured every 24 hours. The contact angle changes as follows Figure 8 After 3 days of UV irradiation, the contact angle of the coating did not change much, indicating that the coating has good UV resistance.

[0064] Adhesion test

[0065] Adhesion test was performed using the PDMS(O)-SiO2-CS-HDTMS sample B obtained in Example 1. Adhesion test of the coating was performed by tape stripping: first, the sample B was fixed to the table, and then the tape was spread flat on the glass surface. Then, the beaker was rolled back and forth from left to right three times as a cycle to ensure that the tape was completely attached to the glass surface. Then, the tape was stripped to test the contact angle of the coating. The contact angle change of the coating is shown in FIG. Fig. 9 ,After one cycle, the contact angle decreased from 166.8° to 152.4°, and after two cycles the contact angle was 143°, indicating that the coating had good stability.

[0066] Electrical performance test

[0067] The effect of super-hydrophobic coating on the output power of photovoltaic modules was studied. The solar simulator of the photovoltaic module used a radiation-stable xenon lamp. The prepared PDMS (O) -SiO2-CS-HDTMS sample B was directly covered on a silicon cell of the same size to ensure that there was no gap between the PDMS (O) -SiO2-CS-HDTMS sample B and the silicon cell. The IV and PV curves of the blank group (untreated glass as the cover plate) and the experimental group (the PDMS (O) -SiO2-CS-HDTMS sample B prepared in Example 1 as the cover plate) were obtained by a photovoltaic module tester (Prova 200a). Fig.10 ). Fig.10It shows that the short-circuit current of the experimental group of components increased from 112.3mA to 123.8mA, and the maximum output power increased from 489.7mW to 539.1mW. In the absence of other interferences, the coating of the present invention increased the maximum power of the photovoltaic component by 10.1%, indicating that the super-hydrophobic transparent glass with the coating of the present invention on the surface increased the power generation of the component.

[0068] Example 5

[0069] This example shows the SEM images of different samples obtained at various stages of the preparation process of the PDMS(O)-SiO2-CS-HDTMS sample B obtained in Example 1.

[0070] The SEM images of the PDMS-SiO2 sample, PDMS-SiO2-CS sample, PDMS(O)-SiO2-CS sample, PDMS(O)-SiO2-CS-HDTMS sample, and the SEM images of the cross section of the PDMS(O)-SiO2-CS sample and the coating in the cross section are shown in Figure 1. Fig.11 As shown in (a), (b), (c), (d), (e), and (f). Fig.11 (a) It can be seen that the nano-sized particles are probably silicon dioxide generated by the hydrolysis of TEOS; after being treated by the candle ash template method, the Fig.11 (b) shows a porous network structure. After annealing at 500℃ in a muffle furnace for 3h, Fig.11 (c) It can be seen that the porous network structure is finer and the particle size is smaller. This may be because the structure of the PDMS-SiO2 coating is affected by the CS structure while removing CS. The surface morphology of the PDMS(O)-SiO2-CS-HDTMS sample after treatment with HDTMS solution is shown in Figure 2. Fig.11 (d), HDTMS fills the voids in the porous network structure; Fig.11 (e) and (f) show that the coating cross-section of the PDMS(O)-SiO2-CS sample is full of porous network structure, the surface is very rough, and the coating thickness is about 35 μm.

[0071] Comparative Example 1

[0072] The only difference between the preparation process of PDMS(O)-SiO2-CS-HDTMS sample B in Comparative Example 1 and Example 1 is that in step a), after the glass slide is cleaned and dried, a "soot template" is first prepared by "slowly, evenly and steadily moving the glass slide horizontally across the top of the flame, moving the sample back and forth until the surface of the sample becomes completely black", then dip-coated in the PDMS-SiO2 solution three times, and finally annealed in a muffle furnace; the rest of the process and process parameters are the same to obtain sample DB.

[0073] The contact angle and transmittance of the tested sample DB and the PDMS(O)-SiO2-CS-HDTMS sample B prepared in Example 1 are as follows: Fig.12 As shown. Fig.12 As can be seen from the left figure, the contact angles of sample DB and sample B are 158.7° and 166.8° respectively, with DB being slightly lower. As can be seen from the right figure, the transmittance of sample DB is only 58.3%, which is much lower than that of sample B.

[0074] The obtained sample DB was characterized to obtain the surface SEM image and cross-sectional SEM image of the sample DB. Fig.13 As shown, from Fig.13 (a) It can be seen that there are nano-sized particles on the surface of the obtained sample DB. Fig.11 (d) Comparison shows that the particles in PDMS(O)-SiO2-CS-HDTMS sample B are larger; Fig.13 (b) and Fig.11 (e) It can be seen that there is a three-dimensional network structure in the PDMS(O)-SiO2-CS-HDTMS sample B, while there is no three-dimensional network structure in the sample DB and small blocks appear.

Claims

1. A method for preparing super-hydrophobic transparent glass for manufacturing solar panels, characterized in that: The steps include: a) Preparation of superwetting surface: first, polydimethylsiloxane (PDMS) and dibutyltin dilaurate (DBTDL) are added to n-hexane to obtain a PDMS solution; then, TEOS is added dropwise to the PDMS solution and stirred to mix evenly to obtain a PDMS-SiO2 solution; then, the glass sheet is ultrasonically cleaned in water and anhydrous ethanol in turn and then dried; next, the dried glass sheet is dipped in the PDMS-SiO2 solution for multiple times, with a certain time interval between each dip, to obtain a PDMS-SiO2 sample; Subsequently, the PDMS-SiO2 sample is reciprocated and horizontally moved through the top of the flame, and soot is deposited on the surface of the sample until it becomes completely black, thereby obtaining a PDMS-SiO2-CS sample; finally, the PDMS-SiO2-CS sample is placed in a muffle furnace for high-temperature annealing, and the annealed sample is naturally cooled to room temperature, thereby obtaining a PDMS(O)-SiO2-CS sample; The mass ratio of PDMS:DBTDL:TEOS is 4:0.1:1; the solid-liquid ratio of PDMS:n-hexane is 4g:120mL; the stirring time is not less than 1 hour; the dip coating is performed for not less than 3 times; the annealing temperature in the muffle furnace is 500°C, and the annealing time is not less than 3 hours; b) preparing hexadecyltrimethoxysilane HDTMS solution: respectively measuring HDTMS, ultrapure water and anhydrous ethanol, mixing them, stirring and mixing them evenly after ultrasonic treatment, and refrigerating them for later use; The volume ratio of HDTMS: ultrapure water: anhydrous ethanol is 3:10:87; the ultrasonic time is not less than 1 hour, the stirring time is not less than 5 hours; the refrigeration temperature is 7-8°C; c) spraying the HDTMS solution obtained in step b) uniformly onto the surface of the PDMS(O)-SiO2-CS sample obtained in step a), curing at room temperature and drying in an oven to obtain a PDMS(O)-SiO2-CS-HDTMS sample, i.e., the super-hydrophobic transparent glass; The spraying is performed twice; the room temperature curing time is not less than 10 minutes; the drying temperature is not less than 120°C and the time is not less than 2 hours.

2. Application of the super-hydrophobic transparent glass obtained by the preparation method described in claim 1 in manufacturing solar panels.

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