Porous wave-transparent super-hydrophobic coating, and preparation method therefor and use thereof

Abstract

The present invention relates to the technical field of functional coatings, and disclosed therein are a porous wave-transparent super-hydrophobic coating, and a preparation method therefor and the use thereof. The raw materials of the coating comprise the following components in parts by mass: 1-10 parts of a wave-transparent resin, 0.1-5 parts of a fluorinated modifier, 0.5-6 parts of a curing agent, 6-60 parts of a volatile organic solvent, and 0.1-2 parts of a water solvent. In the present invention, the super-hydrophobic coating is prepared by using a method of constructing a porous structure in the wave-transparent resin, thereby synergistically improving the wave-transparent performance of the coating while endowing the coating with waterproofing and self-cleaning functions.

Description

A porous, wave-transparent, superhydrophobic coating, its preparation method, and its application. Technical Field

[0001] This invention relates to the field of functional coating technology, specifically to a porous, wave-transparent, superhydrophobic coating, its preparation method, and its application. Background Technology

[0002] Communication equipment, including communication base stations, satellite antennas, radar, and electronic devices, often faces harsh environments when operating outdoors, such as rain and snow cover, and sand and dust erosion, which severely degrades the signal transmission performance of the equipment. To address this issue, ensure the efficient operation of communication equipment around the clock, and improve its reliability and working efficiency, designing a waterproof and self-cleaning coating is of great significance.

[0003] Inspired by the "lotus effect," superhydrophobic coatings, through the combined action of surface micro-nano composite structures and low surface energy organic matter, create a superwetting surface where water droplets exhibit a static contact angle greater than 150° and a roll-off angle less than 10°, possessing excellent waterproof, anti-fouling, and self-cleaning properties. Applying such coatings to the surfaces of communication equipment can not only effectively solve the aforementioned problems but also provide physical protection to the substrate, extending its service life. However, current superhydrophobic coatings suffer from rough surface structures and internal multiphase mixing, severely affecting their wave transmission performance. Therefore, protective strategies for superhydrophobic coatings on communication equipment surfaces have been rarely reported to date. Summary of the Invention

[0004] To address the shortcomings of the aforementioned background technology, this invention provides a porous, wave-transparent superhydrophobic coating, its preparation method, and its application to improve the wave transmittance of superhydrophobic coatings, enabling their application on the surface of communication equipment and solving the problem of signal transmission performance degradation caused by rain and dust. This method simplifies the preparation process of superhydrophobic coatings and has advantages such as simple operation and low cost, making it suitable for large-scale applications.

[0005] The first objective of this invention is to provide a porous, microwave-transparent, superhydrophobic coating, wherein the raw materials of the coating include the following components in parts by weight: 1-10 parts of microwave-transparent resin, 0.1-5 parts of fluorinated modifier, 0.5-6 parts of curing agent, 6-60 parts of volatile organic solvent, and 0.1-2 parts of water solvent.

[0006] Preferably, the microwave-transparent resin is one or more selected from polytetrafluoroethylene resin, epoxy resin, polyurethane resin, polyimide resin, and cyanate ester resin.

[0007] Preferably, the volatile organic solvent is one or more of ethyl acetate, butyl acetate, methyl acetate, and hydrofluoroether.

[0008] Preferably, the fluorinated modifier is one or more of fluorosiloxanes, fluorochlorosilanes, fluorosilicone resins, and fluoroacrylic resins.

[0009] Preferably, the curing agent is one or more of boron trifluoride type curing agents, polyisocyanate type curing agents, polyol type curing agents, and polyamine type curing agents.

[0010] The second objective of this invention is to provide a method for preparing a porous, microwave-transparent, superhydrophobic coating, comprising the following steps: dissolving a microwave-transparent resin in a volatile organic solvent to obtain a microwave-transparent resin solution; adding a fluorination modifier to the microwave-transparent resin solution and mixing and reacting to obtain a fluorinated microwave-transparent resin solution; adding a curing agent to the fluorinated microwave-transparent resin solution and mixing uniformly to obtain solution A; uniformly dispersing an aqueous solvent in a volatile organic solvent to obtain solution B; uniformly mixing solution A and solution B to obtain a porous, microwave-transparent, superhydrophobic coating; coating the porous, microwave-transparent, superhydrophobic coating onto the surface of a substrate, allowing it to stand at room temperature for 0.5–2 hours, and then maintaining the temperature at 80–150°C for 2–4 hours, thereby obtaining a porous, microwave-transparent, superhydrophobic coating on the surface of the substrate.

[0011] Preferably, the mass ratio of the microwave-transparent resin to the volatile organic solvent in the microwave-transparent resin solution is 1:0.5 to 50.

[0012] Preferably, the mass ratio of aqueous solvent to volatile organic solvent in solution B is (0.1-2):(1-10).

[0013] Preferably, the coating on the substrate surface is applied by spraying, brushing, or dipping.

[0014] The third objective of this invention is to provide an application of a porous, wave-transparent, superhydrophobic coating in communication equipment.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a porous wave-transparent superhydrophobic coating, its preparation method and application. The present invention uses a method of constructing a porous structure in a wave-transparent resin to prepare a superhydrophobic coating. The wave-transparent resin and the porous structure synergistically improve the wave-transparent performance of the coating, making the wave transmittance exceed 92%, while endowing the coating with waterproof and self-cleaning functions.

[0016] This invention modifies the microwave-transparent resin with a fluorinated modifier to reduce the surface energy of the microwave-transparent resin. Combined with the roughness imparted by the porous structure, the coating has excellent superhydrophobicity, with a surface water contact angle >160° and a roll-off angle <2°.

[0017] The present invention provides a coating for use on communication equipment, which not only ensures the working performance of the communication equipment itself, but also endows it with a number of unique functions, including superhydrophobicity and self-cleaning properties, so that it can avoid performance degradation caused by rain or dust covering, and operate efficiently and stably in all weather conditions.

[0018] This invention simplifies the coating preparation process. It only requires mixing and stirring several raw materials, and then spraying them in one step to obtain a porous, wave-transparent, superhydrophobic coating. It has low requirements for substrate material and shape, low cost, and can be prepared on a large scale. Attached Figure Description

[0019] Figure 1 shows the macroscopic and wettability diagrams of the porous, wave-transparent, superhydrophobic coating, where a is a macroscopic photograph of the coating and b is an optical micrograph of the water contact angle and roll-off angle of the coating surface; Figure 2 shows the surface morphology diagram of the porous, wave-transparent, superhydrophobic coating; Figure 3 shows the specific surface area and porosity diagrams of the porous, wave-transparent, superhydrophobic coating; Figure 4 shows the wave transmittance diagram of the porous, wave-transparent, superhydrophobic coating; Figure 5 shows the self-cleaning characteristics diagram of the porous, wave-transparent, superhydrophobic coating, where a is the self-cleaning characteristic diagram of water droplets and b is the self-cleaning characteristic diagram of condensed dew droplets; Figure 6 shows the environmental stability diagram of the porous, wave-transparent, superhydrophobic coating. Detailed Implementation

[0020] To enable those skilled in the art to better understand and implement the technical solutions of the present invention, the present invention will be further described below in conjunction with specific embodiments and accompanying drawings. However, the embodiments described are not intended to limit the present invention.

[0021] This invention addresses the problem that current superhydrophobic coatings suffer from rough surface structures and internal multiphase mixing, which severely affect their wave transmission performance. To improve the wave transmission of superhydrophobic coatings and enable their application on communication equipment surfaces, thus solving the problem of signal transmission performance degradation caused by rain and dust, this invention provides a porous wave-transparent superhydrophobic coating, its preparation method, and its applications.

[0022] To achieve the above objectives, the first aspect of the present invention provides a porous, microwave-transparent, superhydrophobic coating, wherein the raw materials of the coating include the following components in parts by weight: 1 to 10 parts of microwave-transparent resin, 0.1 to 5 parts of fluorinated modifier, 0.5 to 6 parts of curing agent, 6 to 60 parts of volatile organic solvent, and 0.1 to 2 parts of water solvent.

[0023] The microwave-transparent resin is one or more of polytetrafluoroethylene resin, epoxy resin, polyurethane resin, polyimide resin, and cyanate ester resin.

[0024] The volatile organic solvent is one or more selected from ethyl acetate, butyl acetate, methyl acetate, and hydrofluoroether. The volatile organic solvent is immiscible with the aqueous solvent.

[0025] The fluorinated modifier is one or more of fluorinated siloxanes, fluorinated chlorosilanes, fluorinated silicone resins, and fluorinated acrylic resins.

[0026] The curing agent is one or more of the following: boron trifluoride type curing agent, polyisocyanate type curing agent, polyol type curing agent, and polyamine type curing agent.

[0027] The water-based solvent used is deionized water.

[0028] The second aspect of this invention provides a method for preparing a porous, microwave-transparent, superhydrophobic coating, comprising the following steps: dissolving a microwave-transparent resin in a volatile organic solvent to obtain a microwave-transparent resin solution; adding a fluorination modifier to the microwave-transparent resin solution and mixing and reacting to obtain a fluorinated microwave-transparent resin solution; adding a curing agent to the fluorinated microwave-transparent resin solution and mixing uniformly to obtain solution A; uniformly dispersing an aqueous solvent in a volatile organic solvent to obtain solution B; uniformly mixing solution A and solution B to obtain a porous, microwave-transparent, superhydrophobic coating; coating the porous, microwave-transparent, superhydrophobic coating onto the surface of a substrate, allowing it to stand at room temperature for 0.5–2 hours, and then maintaining the temperature at 80–150°C for 2–4 hours, thereby obtaining a porous, microwave-transparent, superhydrophobic coating on the surface of the substrate.

[0029] The mass ratio of the microwave-transparent resin to the volatile organic solvent in the microwave-transparent resin solution is 1:0.5 to 50.

[0030] The mass ratio of aqueous solvent to volatile organic solvent in solution B is (0.1-2):(1-10).

[0031] The coating on the substrate surface is achieved by spraying, brushing, or dipping.

[0032] In one embodiment, a method for preparing a porous, microwave-transparent, superhydrophobic coating includes: (1) dissolving 1-10 parts by weight of microwave-transparent resin in 5-50 parts by weight of volatile organic solvent and mechanically stirring for 3-20 minutes; (2) adding 0.1-5 parts by weight of fluorinated modifier to the solution obtained in step (1) and stirring for 6-24 hours to obtain a fluorinated microwave-transparent resin solution, thereby imparting low surface energy to the microwave-transparent resin; (3) adding 0.5-6 parts by weight of curing agent to the fluorinated microwave-transparent resin solution obtained in step (2) and mechanically stirring for 1-10 minutes; (4) dispersing 0.1-2 parts by weight of deionized water in 1-10 parts by weight of volatile organic solvent, ultrasonically breaking for 5-10 minutes, and mechanically stirring for 10-20 minutes; (5) mixing the solutions obtained in steps (3) and (4) and mechanically stirring for 30-60 minutes until the two are evenly mixed to obtain a porous, microwave-transparent, superhydrophobic coating. (6) Apply the superhydrophobic coating obtained in step (5) to the surface of different substrates by spraying, brushing or dipping. Place it at room temperature for 0.5-2 hours, and then heat it at 80-150℃ for 2 hours to obtain a porous wave-transparent superhydrophobic coating.

[0033] Among them, the microwave-transparent resin is used to improve the microwave transmittance, and after being treated with a fluorinated modifier, it obtains a low surface energy. Then, by evaporating the deionized water dispersed in the resin, a porous structure is obtained. On the one hand, the coating can obtain superhydrophobicity, and on the other hand, the microwave transmittance of the coating can be further improved.

[0034] The third aspect of this invention provides an application of a porous, wave-transparent, superhydrophobic coating in communication equipment.

[0035] It should be noted that, unless otherwise specified, the experimental methods used in this invention are all conventional methods; and the reagents and materials used, unless otherwise specified, are all commercially available.

[0036] Example 1 A method for preparing a porous, microwave-transparent, superhydrophobic coating. In this example, the microwave-transparent resin is epoxy resin, the volatile organic solvent is butyl acetate, the fluorination modifier is perfluorodecyltrichlorosilane, and the curing agent is isocyanate. The preparation steps are as follows: (1) Dissolve 1 part by mass of microwave-transparent resin in 5 parts by mass of volatile organic solvent and stir mechanically for 3 minutes; (2) Add 0.1 part by mass of fluorination modifier to the solution obtained in step (1) and keep stirring for 6 hours to obtain a fluorinated microwave-transparent resin solution; (3) Add 0.5 part by mass of curing agent to the fluorinated microwave-transparent resin solution obtained in step (2) and stir mechanically for 1 minute; (4) Disperse 0.1 part by mass of deionized water in 1 part by mass of volatile organic solvent, sonicate for 5 minutes, and keep stirring mechanically for 10 minutes; (5) Mix the solutions obtained in step (3) and step (4) and stir mechanically for 30 minutes until the two are evenly mixed to obtain a porous, microwave-transparent, superhydrophobic coating. (6) The superhydrophobic coating obtained in step (5) is applied to the surface of different substrates by spraying, brushing or dipping. The coating is placed at room temperature for 0.5 hours and then heated at 80°C for 2 hours to obtain a porous, wave-transparent superhydrophobic coating.

[0037] Figure 1 shows an optical photograph and an immersion optical micrograph of the coating. It can be seen that the coating is uniform and dense, without defects such as cracking, blistering, or peeling. The water droplet contact angle on the coating surface is 160.8° and the roll-off angle is 1°. Water droplets can easily roll off the coating surface without wetting residue, and the coating surface remains dry.

[0038] Example 2 A method for preparing a porous, microwave-transparent, superhydrophobic coating. In this example, the microwave-transparent resin is polyimide resin, the volatile organic solvent is ethyl acetate, the fluorination modifier is perfluorodecyltriethoxysilane, and the curing agent is a polyol curing agent. The preparation steps are as follows: (1) Dissolve 10 parts by mass of the microwave-transparent resin in 50 parts by mass of the volatile organic solvent and stir mechanically for 20 minutes; (2) Add 5 parts by mass of the fluorination modifier to the solution obtained in step (1) and keep stirring for 24 hours to obtain a fluorinated microwave-transparent resin solution; (3) Add 6 parts by mass of the curing agent to the fluorinated microwave-transparent resin solution obtained in step (2) and stir mechanically for 10 minutes; (4) Disperse 2 parts by mass of deionized water in 10 parts by mass of the volatile organic solvent, sonicate for 10 minutes, and keep stirring mechanically for 20 minutes; (5) Mix the solutions obtained in step (3) and step (4) and stir mechanically for 60 minutes until the two are evenly mixed to obtain a porous, microwave-transparent, superhydrophobic coating. (6) The superhydrophobic coating obtained in step (5) is applied to the surface of different substrates by spraying, brushing or dipping. The coating is placed at room temperature for 2 hours and then heated at 150°C for 2 hours to obtain a porous wave-transparent superhydrophobic coating.

[0039] Figure 2 shows the microstructure of the coating, revealing a large number of pores with sizes ranging from 100 to 800 nm. Compared to Example 1, in this example, the fluorination modifier used is perfluorodecyltriethoxysilane, whose ethoxy group has much lower chemical activity than the chlorine group. This results in a relatively lower degree of modification to the microwave-transparent resin, increased surface energy, and consequently, reduced superhydrophobicity of the coating. The water contact angle decreases to 155°, while the roll-off angle increases to approximately 5°.

[0040] Example 3 A method for preparing a porous, microwave-transparent, superhydrophobic coating. In this example, the microwave-transparent resin is polytetrafluoroethylene resin, the volatile organic solvent is hydrofluoroether, the fluorination modifier is fluorinated silicone resin, and the curing agent is boron trifluoride curing agent. The preparation steps are as follows: (1) Dissolve 5 parts by mass of the microwave-transparent resin in 25 parts by mass of the volatile organic solvent and stir mechanically for 10 minutes; (2) Add 2.5 parts by mass of the fluorination modifier to the solution obtained in step (1) and keep stirring for 16 hours to obtain a fluorinated microwave-transparent resin solution; (3) Add 3 parts by mass of the curing agent to the fluorinated microwave-transparent resin solution obtained in step (2) and stir mechanically for 5 minutes; (4) Disperse 2 parts by mass of deionized water in 0.1 parts by mass of the volatile organic solvent, sonicate for 5 minutes, and keep stirring mechanically for 15 minutes; (5) Mix the solutions obtained in step (3) and step (4) and stir mechanically for 45 minutes until the two are evenly mixed to obtain a porous, microwave-transparent, superhydrophobic coating. (6) The superhydrophobic coating obtained in step (5) is applied to the surface of different substrates by spraying, brushing or dipping. The coating is placed at room temperature for 2 hours and then heated at 120°C for 2 hours to obtain a porous wave-transparent superhydrophobic coating.

[0041] Figure 3 shows the porosity and specific surface area of ​​the coating. It can be seen that the porosity and specific surface area of ​​the coating are only 36% and 1.36 cm², respectively. 2 / g. Compared to Example 2, the number of pores formed by evaporation in the coating is significantly reduced due to the lower content of deionized water added in this example, resulting in a decrease in porosity and specific surface area. Furthermore, the reduced porosity leads to a decrease in coating roughness, resulting in a weakened superhydrophobicity, a decrease in the water contact angle to 150°, and an increase in the roll-off angle to 20°.

[0042] Figure 4 shows the wave transmittance of the porous superhydrophobic coating in Example 3. Due to its porous structure, the average wave transmittance is as high as 92%, similar to that of the bare radome sample, and far higher than that of traditional wave-transparent resin coatings. However, compared with Examples 1 and 2, the average wave transmittance is relatively lower because the porosity of the coating in this example is lower, while the average wave transmittance of the coating in Example 1 is 95%. In summary, the porous superhydrophobic coating significantly improves the wave transmittance and will not affect the performance of communication equipment when applied to it.

[0043] Example 4 A method for preparing a porous, microwave-transparent, superhydrophobic coating. In this example, the microwave-transparent resin is polyurethane resin, the volatile organic solvent is methyl acetate, the fluorinated modifier is fluorinated acrylic resin, and the curing agent is a polyamine type curing agent. The preparation steps are as follows: (1) Dissolve 1 part by mass of microwave-transparent resin in 50 parts by mass of volatile organic solvent and stir mechanically for 3 minutes; (2) Add 0.5 parts by mass of fluorinated modifier to the solution obtained in step (1) and keep stirring for 10 hours to obtain a fluorinated microwave-transparent resin solution; (3) Add 1 part by mass of curing agent to the fluorinated microwave-transparent resin solution obtained in step (2) and stir mechanically for 3 minutes; (4) Disperse 2 parts by mass of deionized water in 3 parts by mass of volatile organic solvent, sonicate for 8 minutes, and keep stirring mechanically for 12 minutes; (5) Mix the solutions obtained in step (3) and step (4) and stir mechanically for 40 minutes until the two are evenly mixed to obtain a porous, microwave-transparent, superhydrophobic coating. (6) The superhydrophobic coating obtained in step (5) is applied to the surface of different substrates by spraying, brushing or dipping. The coating is placed at room temperature for 2 hours and then heated at 100°C for 2 hours to obtain a porous wave-transparent superhydrophobic coating.

[0044] Figure 5 shows the self-cleaning optical image of the coating. It can be seen that after dust is deposited on the coating surface, it can be easily removed by rolling water droplets, demonstrating excellent self-cleaning performance. Compared with Example 1, this example has a lower content of microwave-transparent resin, better coating leveling, and a thinner, more uniform, and smoother structure, which is beneficial for self-cleaning properties. Therefore, the coating in this example not only possesses the water droplet self-cleaning property of the coating in Example 1, but also the condensation droplet self-cleaning property, meaning it can actively remove dust by collecting dew droplets formed from water vapor in the air, thus saving manpower and resources.

[0045] Example 5 A method for preparing a porous, microwave-transparent, superhydrophobic coating. In this example, the microwave-transparent resin is a composite resin of polytetrafluoroethylene resin and cyanate ester resin, the volatile organic solvent is butyl acetate, the fluorination modifier is perfluorooctyltrichlorosilane, and the curing agent is a polyamine type curing agent. The preparation steps are as follows: (1) Dissolve 5 parts by mass of the microwave-transparent resin in 30 parts by mass of the volatile organic solvent and stir mechanically for 10 minutes; (2) Add 3 parts by mass of the fluorination modifier to the solution obtained in step (1) and keep stirring for 10 hours to obtain a fluorinated microwave-transparent resin solution; (3) Add 3 parts by mass of the curing agent to the fluorinated microwave-transparent resin solution obtained in step (2) and stir mechanically for 3 minutes; (4) Disperse 1.5 parts by mass of deionized water in 5 parts by mass of the volatile organic solvent, sonicate for 10 minutes, and keep stirring mechanically for 20 minutes. (5) Mix the solutions obtained in step (3) and step (4) and stir mechanically for 60 minutes until they are evenly mixed to obtain a porous, wave-transparent, superhydrophobic coating; (6) Apply the superhydrophobic coating obtained in step (5) to the surface of different substrates by spraying, brushing or dipping, place it at room temperature for 2 hours, and then heat it at 120°C for 2 hours to obtain a porous, wave-transparent, superhydrophobic coating.

[0046] Figure 6 shows the environmental stability of the coating. It can be seen that after being placed outdoors for over 180 days, enduring sun exposure, wind, sand erosion, rain, and blizzard freezing, the coating still maintains its superhydrophobicity, with almost no change in the water contact angle and roll-off angle, demonstrating excellent environmental stability. Compared to Example 1, the wave-transparent resin in this example is a composite of polytetrafluoroethylene resin and cyanate ester resin, which improves the coating's weather resistance.

[0047] In summary, the superhydrophobic coating provided by this invention possesses excellent properties such as water repellency, anti-fouling, and self-cleaning, which can prevent water and dust accumulation in communication equipment, effectively solving problems such as rain attenuation and dust reducing signal transmission performance, while also improving the aesthetics of communication equipment. However, the superhydrophobic coating itself has low wave transmittance, which severely limits its application in communication equipment.

[0048] This invention provides a porous, microwave-transparent, superhydrophobic coating and its preparation method. First, a microwave-transparent resin is dispersed in a volatile organic solvent. A fluorination modifier is used to reduce the resin's surface energy. Then, a curing agent and an ultrasonically dispersed mixture of the volatile organic solvent and water are added. After thorough stirring, the mixture is applied to the surface of different substrates. Finally, deionized water is removed by heating, and the coating is cured to obtain a porous, microwave-transparent, superhydrophobic coating. This technology simultaneously endows the coating with high microwave transmittance and multiple functionalities, including superhydrophobicity and self-cleaning properties, significantly improving the outdoor operating efficiency of communication equipment. This invention simplifies the preparation process of superhydrophobic coatings and has advantages such as simple operation and low cost, making it suitable for large-scale applications.

[0049] This invention describes preferred embodiments and their effects. However, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to include both the preferred embodiments and all changes and modifications falling within the scope of this invention.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A porous, wave-transparent, superhydrophobic coating, characterized in that, The raw material for the coating comprises the following components in parts by weight: The mixture contains 1-10 parts of microwave-transparent resin, 0.1-5 parts of fluorinated modifier, 0.5-6 parts of curing agent, 6-60 parts of volatile organic solvent, and 0.1-2 parts of water solvent.

2. The porous wave-transparent superhydrophobic coating of claim 1, wherein, The microwave-transparent resin is one or more of polytetrafluoroethylene resin, epoxy resin, polyurethane resin, polyimide resin, and cyanate ester resin.

3. The porous wave-transparent superhydrophobic coating of claim 1, wherein, The volatile organic solvent is one or more of ethyl acetate, butyl acetate, methyl acetate, and hydrofluoroether.

4. The porous wave-transparent superhydrophobic coating of claim 1, wherein, The fluorinated modifier is one or more of fluorinated siloxanes, fluorinated chlorosilanes, fluorinated silicone resins, and fluorinated acrylic resins.

5. The porous wave-transparent superhydrophobic coating of claim 1, wherein, The curing agent is one or more of the following: boron trifluoride type curing agent, polyisocyanate type curing agent, polyol type curing agent, and polyamine type curing agent.

6. A method for preparing the porous wave-transparent super-hydrophobic coating according to any one of claims 1 to 5, characterized in that, Includes the following steps: A microwave-transparent resin solution is prepared by dissolving the microwave-transparent resin in a volatile organic solvent. A fluorinated modifier is added to a microwave-transparent resin solution, and the mixture is reacted to obtain a fluorinated microwave-transparent resin solution. Add a curing agent to the fluorinated microwave-transparent resin solution and mix evenly to obtain solution A; Solution B is prepared by uniformly dispersing an aqueous solvent in a volatile organic solvent; Solution A and solution B are uniformly mixed to prepare a porous, wave-transparent, superhydrophobic coating. A porous, wave-transparent, superhydrophobic coating is applied to the surface of a substrate and left to stand at room temperature for 0.5–2 hours. Then, it is kept at 80–150°C for 2–4 hours to form a porous, wave-transparent, superhydrophobic coating on the substrate surface.

7. The method of claim 6, wherein the porous wave-transparent superhydrophobic coating is prepared by the steps of: The mass ratio of the microwave-transparent resin to the volatile organic solvent in the microwave-transparent resin solution is 1:0.5 to 50.

8. The method of claim 6, wherein the porous wave-transparent superhydrophobic coating is prepared by the steps of: The mass ratio of aqueous solvent to volatile organic solvent in solution B is (0.1-2):(1-10).

9. The method of claim 6, wherein the porous wave-transparent superhydrophobic coating is prepared by the steps of: The coating on the substrate surface is achieved by spraying, brushing, or dipping.

10. The application of the porous, wave-transparent, superhydrophobic coating according to any one of claims 1 to 5 in communication equipment.

Images