A method for preparing a flexible superhydrophobic anti-icing coating

Abstract

The application discloses a preparation method of a flexible super-hydrophobic anti-icing coating and relates to the technical field of super-hydrophobic materials.The preparation method comprises the following steps: preparing nano-silver loaded multi-layer graphene; mixing PVP solution and multi-layer graphene suspension uniformly, adding glucose, stirring uniformly, adding silver-ammonia solution to react when the suspension reaches a set temperature, centrifugally separating after the reaction is completed, obtaining the nano-silver loaded multi-layer graphene product, cleaning by using pure water or ethanol, and drying in an oven for standby; and preparing a flexible super-hydrophobic layer; smearing a mixture of PDMS and a PDMS curing agent on the surface of a glass sheet, uniformly spraying nano-loaded multi-layer graphene powder to the surface of the mixture of uncured PDMS and the PDMS curing agent by using an airbrush, and placing in an oven for curing to obtain the flexible super-hydrophobic anti-icing coating.The preparation method is simple and environment-friendly, can be used on a large scale, and can solve the problems of anti-icing and deicing on various surfaces.

Description

Technical Field

[0001] This invention relates to the field of superhydrophobic materials technology, specifically to a method for preparing a flexible superhydrophobic anti-icing coating. Background Technology

[0002] With the rapid development of modern technology, there are various types of outdoor equipment and buildings. In extreme and harsh environments, such as low temperatures, the surfaces of equipment or buildings are prone to icing and frosting, increasing the load on the equipment and facilities and posing significant safety hazards to various buildings and personal safety. When icicles or ice blocks reach a certain size, they will fall under the influence of external forces and gravity, causing injuries and property damage.

[0003] Patent CN113881089A discloses a superhydrophobic separable flexible film and its preparation method. Specifically, water-based self-adhesive is coated on the surface of a polyethylene film, and then hydrophobic SiO2 powder is sprayed onto the surface of the water-based self-adhesive. After drying, a superhydrophobic separable flexible film is obtained.

[0004] Patent CN113549863A discloses a wear-resistant superhydrophobic substrate protective coating and its preparation method. Specifically, the substrate protective coating includes a pre-treated coating surface and a composite material coating. The composite material coating is formed by spraying a mixture of zirconium dioxide powder, polytetrafluoroethylene powder and silicone powder. The pre-treated coating surface has an uneven structure after being polished and sandblasted.

[0005] Most current superhydrophobic anti-icing coatings are similar to those disclosed in the aforementioned patents, and all suffer from problems such as limited coating functionality, complex preparation methods, and inability to prevent icing through photothermal or electrothermal processes. Summary of the Invention

[0006] Based on the problems existing in the background technology, the purpose of this invention is to provide a method for preparing a flexible superhydrophobic anti-icing coating. This preparation method is simple and environmentally friendly, can be used on a large scale, and can solve the anti-icing and de-icing problems of various surfaces.

[0007] This invention is achieved through the following technical solution:

[0008] In a first aspect, this application provides a method for preparing a flexible superhydrophobic anti-icing coating, comprising the following steps:

[0009] Preparation of nano-silver supported multilayer graphene: PVP solution and multilayer graphene suspension were mixed evenly, glucose was added and stirred evenly. When the temperature of the suspension reached 20-30℃, silver ammonia solution was added to react. After the reaction was completed, the nano-silver supported multilayer graphene product was obtained by centrifugation. The product was then washed with pure water or ethanol and dried in an oven for later use.

[0010] Preparation of flexible superhydrophobic layer: A mixture of PDMS and PDMS curing agent (such as silane coupling agent KH-550, isocyanate, acid anhydride curing agent, etc.) is coated on the surface of a glass slide. Then, nano-loaded multilayer graphene powder is uniformly sprayed onto the surface of the uncured PDMS and PDMS curing agent mixture using a spray gun. Finally, it is placed in an oven for curing to obtain a flexible superhydrophobic anti-icing coating.

[0011] In the preparation of nano-silver supported multilayer graphene, the glucose added in this invention can lose electrons in the redox reaction and can donate multiple electrons to other substances, thus having a strong reducing ability. Furthermore, polyvinylpyrrolidone (PVP) can accelerate the reaction between silver ions and glucose, stabilize hydrogen ions, and prevent the large-scale aggregation of silver ions.

[0012] This invention utilizes a glucose reduction reaction to prepare nano-silver-supported multilayer graphene (AgNPs@multilayergraphene), employs a mild method to prepare photothermal and electrothermal particles, and utilizes Marangoni's capillary response to prepare a flexible superhydrophobic anti-icing coating with photothermal@electrothermal properties on the PDMS surface using powder spraying. The preparation method is simple and environmentally friendly, can be mass-produced, and can solve the problem of anti-icing and de-icing on various surfaces.

[0013] Furthermore, the silver ammonia solution is prepared by adding 2.0 wt% ammonia solution to a 0.8–2.0 wt% silver nitrate solution until the brown precipitate just disappears.

[0014] Furthermore, in the preparation of nano-silver supported multilayer graphene, the concentration of the PVP solution is 2-4 mg / ml, and the concentration of the multilayer graphene suspension is 0.1-0.5 mg / ml.

[0015] Furthermore, when preparing silver nanoparticle-supported multilayer graphene, the reaction time after adding silver ammonia solution is 3 to 10 minutes.

[0016] Furthermore, when preparing nano-silver supported multilayer graphene, the centrifugal separation speed is 4000-6000 rpm.

[0017] Furthermore, when preparing nano-silver supported multilayer graphene, the drying temperature in the oven was set to 50–100 °C.

[0018] Furthermore, the ratio of PDMS to PDMS curing agent is (2-5):(0.2-0.5).

[0019] Furthermore, when preparing the flexible superhydrophobic layer, the nozzle diameter of the spray gun used is 0.5–1.5 mm, and the spraying distance is 10–30 cm.

[0020] Furthermore, when preparing the flexible superhydrophobic layer, the curing temperature in the oven is 40–70°C, and the curing time is 1–5 hours.

[0021] Secondly, this application provides a flexible superhydrophobic anti-icing coating, which is prepared by any of the above-mentioned preparation methods.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] (1) The graphene used in this invention has extremely high electrical and thermal conductivity and can generate a significant temperature rise effect under light conditions. When light shines on the graphene surface, the photon energy is absorbed and converted into electrical energy, which excites the free electrons in the graphene. These free electrons move in the material and interact with the lattice, thereby generating heat energy. Furthermore, the graphene used in this invention is multilayer graphene. The use of multilayer graphene increases the probability of π-π* electron transition, resulting in better photothermal performance of multilayer graphene.

[0024] (2) This invention uses glucose to reduce silver ions, which are then grown and loaded at defects in multilayer graphene. Based on the plasma resonance (LSPR) effect of nano-silver particles, they can absorb incident light to excite LSPR, and after decay, generate high-energy hot electrons on the surface of metal nanoparticles. Smaller metal nanoparticles are more likely to generate high-energy hot electrons. Loading them with multilayer graphene can synergistically increase the photothermal effect and enhance the photothermal anti-icing performance of the coating.

[0025] (3) The present invention utilizes a simple, green and efficient powder spraying method to prepare nano-silver loaded multilayer graphene powder, which is coated on the PDMS surface through the Marangoni effect to form a micro-protrusion structure. This structure can form a large number of abundant "air valleys", transforming the liquid-solid interface into a gas-liquid interface, which has a lifting effect on the water surface, thereby achieving a superhydrophobic effect. This superhydrophobic structure allows water droplets to fall off the substrate surface in time, thereby avoiding the adhesion of water droplets and greatly extending the freezing time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0027] Figure 1 This is a flowchart illustrating the preparation process of the flexible superhydrophobic anti-icing coating using the powder spraying method in this invention.

[0028] Figure 2 This is a scanning electrochemical microscope (SEM) image of the silver nanoparticle-supported multilayer graphene prepared in Example 1 of the present invention.

[0029] Figure 3 The figure shows the experimental results of the water contact angle of the flexible superhydrophobic anti-icing coating prepared in Example 1 of this invention;

[0030] Figure 4 The figure shows the experimental results of the water contact angle of the anti-icing coating prepared in Comparative Example 1.

[0031] Figure 5 Photothermal infrared images of nano-silver-supported multilayer graphene powders prepared with different silver nitrate contents. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0033] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment provides a method for preparing a flexible superhydrophobic anti-icing coating, specifically as follows:

[0036] S1. Preparation of nano-silver-supported multilayer graphene

[0037] S1-1. Add 2.0 wt% ammonia solution to a 2.0 wt% silver nitrate solution until the brown precipitate just disappears;

[0038] S1-2. Use an ultrasonic cleaner to fully disperse the multilayer graphene for 10 minutes to make it into a multilayer graphene suspension (0.1mg / ml);

[0039] S1-3. Mix 2 mg / ml PVP solution with 2 ml of 0.1 mg / ml multilayer graphene suspension prepared in step S1-2, stir and add 80 mg glucose. When the suspension reaches the set temperature (25℃), add 1 ml of silver ammonia solution prepared in step S1-1, react for 3 minutes, and then centrifuge at 4000 rpm to obtain the product. Wash the product several times with pure water solution, and finally put it in an oven to dry at 50℃ to obtain nano-silver supported multilayer graphene powder.

[0040] S2, Preparation of ultraflexible hydrophobic layer

[0041] S2-1. Thoroughly mix 2g of PDMS and 0.2g of silane coupling agent KH-550, and evenly coat the mixture onto the surface of a glass slide. Then, uniformly spray the prepared nano-silver-loaded multilayer graphene powder onto the uncured PDMS surface using a spray gun. Utilize the Marangoni capillary effect to self-assemble micro / nano superhydrophobic structures. The nozzle diameter of the spray gun used is 0.5mm, and the spraying distance is 10cm.

[0042] S2-2. Place the product obtained in step S2-1 into an oven and cure it at 40℃ for 1 hour to obtain a photothermal@electrothermal flexible superhydrophobic anti-icing coating. (Where @ indicates a parallel relationship, meaning "and")

[0043] The electrothermal performance of the photothermal@electrothermal flexible superhydrophobic anti-icing coating prepared in Example 1 was tested, specifically as follows:

[0044] Using electrode clips, the two ends of the sample were connected and a 40V DC current was applied to characterize its electrothermal properties. The surface temperature initially rose sharply and then remained at a stable temperature of about 31°C. During the heating process, the superhydrophobic properties of the flexible coating surface remained unchanged.

[0045] like Figure 2 The image shown is a scanning electrochemical microscope (SEM) image of the photothermal@electrothermal flexible superhydrophobic anti-icing coating prepared in this embodiment. The image demonstrates the successful preparation of AgNPs@multilayer graphene, which reduces silver particles with a size of approximately 100 nm to the surface and edge defects of the multilayer graphene. These silver particles exhibit plasmon resonance (LSPR) effects, absorbing incident light to excite LSPR, which then decays to generate high-energy hot electrons on the surface of the metal nanoparticles. Smaller metal nanoparticles are more likely to generate high-energy hot electrons, and loading them onto multilayer graphene can synergistically enhance the photothermal effect.

[0046] Example 2

[0047] This embodiment provides a method for preparing a flexible superhydrophobic anti-icing coating, specifically as follows:

[0048] S1. Preparation of nano-silver-supported multilayer graphene

[0049] S1-1. Add 2.0 wt% ammonia solution to 0.8 wt% silver nitrate solution until the brown precipitate just disappears;

[0050] S1-2. Use an ultrasonic cleaner to fully disperse the multilayer graphene for 20 minutes to make it into a multilayer graphene suspension with a concentration of 0.3 mg / ml.

[0051] S1-3. Mix the 3 mg / ml PVP solution with the 5 ml multilayer graphene suspension prepared in step S1-2 until homogeneous. Then, stir and add 80 mg of glucose. When the suspension reaches the set temperature (22°C), add the 3 ml silver ammonia solution prepared in step S1-1. React for 5 minutes, then centrifuge at 5000 rpm to obtain the product. Wash the product multiple times with ethanol solution, and finally place it in an oven to dry at 80°C to obtain nano-silver supported multilayer graphene powder.

[0052] S2, Preparation of ultraflexible hydrophobic layer

[0053] S2-1. Thoroughly mix 3g of PDMS and 0.3g of isocyanate, and evenly coat the mixture onto the surface of a glass slide. Then, uniformly spray the prepared nano-silver-supported multilayer graphene powder onto the uncured PDMS surface using a spray gun. Utilize the Marangoni capillary effect to self-assemble micro / nano superhydrophobic structures. The nozzle diameter of the spray gun used is 1.0mm, and the spraying distance is 20cm.

[0054] S2-2. Place the product obtained in step S2-1 into an oven and cure it at 50°C for 3 hours to obtain a photothermal@electrothermal flexible superhydrophobic anti-icing coating.

[0055] The electrothermal performance of the photothermal@electrothermal flexible superhydrophobic anti-icing coating prepared in Example 2 was tested, specifically as follows:

[0056] Using electrode clips, the two ends of the sample were connected and a 40V DC current was applied to characterize its electrothermal properties. The surface temperature initially rose sharply and then remained at a stable temperature of about 27°C. During the heating process, the superhydrophobic properties of the flexible coating surface remained unchanged.

[0057] Example 3

[0058] This embodiment provides a method for preparing a flexible superhydrophobic anti-icing coating, specifically as follows:

[0059] S1. Preparation of nano-silver-supported multilayer graphene

[0060] S1-1. Add 2.0 wt% ammonia solution to a 1.2 wt% silver nitrate solution until the brown precipitate just disappears;

[0061] S1-2. Use an ultrasonic cleaner to fully disperse the multilayer graphene for 30 minutes to make it into a multilayer graphene suspension of 0.4 mg / ml.

[0062] S1-3. Mix 4 mg / ml PVP solution with 8 ml of 0.4 mg / ml multilayer graphene suspension prepared in step S1-2. Then stir and add 80 mg glucose. When the suspension reaches the set temperature (20℃), add 5 ml of silver ammonia solution prepared in step S1-1. React for 10 minutes, then centrifuge at 6000 rpm to obtain the product. Wash the product several times with ethanol solution, and finally put it in an oven to dry at 100℃ to obtain nano-silver supported multilayer graphene powder.

[0063] S2, Preparation of ultraflexible hydrophobic layer

[0064] S2-1. Thoroughly mix 5g of PDMS and 0.5g of anhydride curing agent, and evenly coat the mixture onto the surface of a glass slide. Then, use a spray gun to evenly spray the prepared nano-silver-loaded multilayer graphene powder onto the uncured PDMS surface. Utilize the Marangoni capillary effect to self-assemble micro / nano superhydrophobic structures. The nozzle diameter of the spray gun used is 1.5mm, and the spraying distance is 30cm.

[0065] S2-2. Place the product obtained in step S2-1 into an oven and cure it at 70°C for 5 hours to obtain a photothermal@electrothermal flexible superhydrophobic anti-icing coating.

[0066] The electrothermal properties of the photothermal@electrothermal flexible superhydrophobic anti-icing coating prepared in Example 3 were tested, specifically as follows:

[0067] Using electrode clips, the two ends of the sample were connected and a 40V DC current was applied to characterize its electrothermal properties. The surface temperature initially rose sharply and then remained at a stable temperature of about 26°C. During the heating process, the superhydrophobic properties of the flexible coating surface remained unchanged.

[0068] Example 4

[0069] This embodiment provides a method for preparing a flexible superhydrophobic anti-icing coating, specifically as follows:

[0070] S1. Preparation of nano-silver-supported multilayer graphene

[0071] S1-1. Add 2.0 wt% ammonia solution to a 1.6 wt% silver nitrate solution until the brown precipitate just disappears;

[0072] S1-2. Use an ultrasonic cleaner to fully disperse the multilayer graphene for 30 minutes to make it into a multilayer graphene suspension of 0.5 mg / ml.

[0073] S1-3. Mix 4 mg / ml PVP solution with 8 ml of 0.5 mg / ml multilayer graphene suspension prepared in step S1-2. Then stir and add 80 mg glucose. When the suspension reaches the set temperature (30℃), add 5 ml of silver ammonia solution prepared in step S1-1. React for 10 minutes, then centrifuge at 6000 rpm to obtain the product. Wash the product several times with ethanol solution, and finally put it in an oven to dry at 100℃ to obtain nano-silver supported multilayer graphene powder.

[0074] S2, Preparation of ultraflexible hydrophobic layer

[0075] S2-1. Thoroughly mix 5g of PDMS and 0.5g of anhydride curing agent, and evenly coat the mixture onto the surface of a glass slide. Then, use a spray gun to evenly spray the prepared nano-silver-loaded multilayer graphene powder onto the uncured PDMS surface. Utilize the Marangoni capillary effect to self-assemble micro / nano superhydrophobic structures. The nozzle diameter of the spray gun used is 1.5mm, and the spraying distance is 30cm.

[0076] S2-2. Place the product obtained in step S2-1 into an oven and cure it at 70°C for 5 hours to obtain a photothermal@electrothermal flexible superhydrophobic anti-icing coating.

[0077] The electrothermal performance of the photothermal@electrothermal flexible superhydrophobic anti-icing coating prepared in Example 4 was tested, specifically as follows:

[0078] Using electrode clips, the two ends of the sample were connected and a 40V DC current was applied to characterize its electrothermal properties. The surface temperature initially rose sharply and then remained at a stable temperature of about 28°C. During the heating process, the superhydrophobic properties of the flexible coating surface remained unchanged.

[0079] Comparative Example 1

[0080] This comparative example is based on Example 1, but differs from Example 1 in that:

[0081] To better highlight the superior photothermal effect of the coating in Example 1 compared to the multilayer graphene coating, this comparative example compares the photothermal performance of the coating in Example 1 with that of the multilayer graphene coating. The experiment used a xenon lamp light source to simulate 2sun (200mW / cm²). 2The irradiation intensity was measured, and the temperature of the coating was detected at 30-second intervals. The results are shown in Table 1 below. By loading with nano-silver particles, the photothermal performance of multilayer graphene can be improved. At 300 seconds, the temperature can reach 73.2℃, which is 8.7℃ higher than the method of using multilayer graphene alone. This means that in cold environments, the multilayer graphene loaded with nano-silver responds more strongly to light and can generate enough heat to melt the surface ice, thereby achieving the effects of anti-icing and easy de-icing.

[0082] Table 1. Photothermal temperature variation curves of different coatings

[0083]

[0084] Comparative Example 2

[0085] This comparative example is based on Example 1, and differs from the example in that:

[0086] This comparative example uses a complete PDMS coating and Example 1 to conduct a water contact angle experiment to demonstrate the excellent superhydrophobic effect of Example 1. The experiment uses 2.5 μL of clean water, and a water contact angle meter is used to test the hydrophobic effect of the two coatings. The results are as follows: Figure 3 and Figure 4 As shown, PDMS itself has a certain hydrophobic effect, but it cannot prevent icing. The water contact angle of PDMS itself is 100°. Figure 4 The AgNPs@multilayer graphene photothermal micro / nanoparticles, prepared using the Marangoni effect on a PDMS precursor, generate more micropores. When water droplets fall onto the surface, they form an "air wall," holding the droplets in place and thus achieving excellent hydrophobic properties (155°). Figure 3 This reduces the adhesion of supercooled water droplets to the substrate surface, greatly extending the freezing time.

[0087] Comparative Example 3

[0088] This comparative example is based on Example 1, but differs from Example 1 in that it uses nano-silver-supported multilayer graphene prepared with different silver nitrate contents.

[0089] 0.025 g of the prepared silver nanoparticle-supported multilayer graphene powder was weighed into a 10 ml glass bottle, and pure water was added and stirred thoroughly to disperse it. The prepared sample was placed 20 cm below a xenon lamp light source, and the current was adjusted to 15 A. The photothermal temperature of different samples was tested for 5 minutes. Figure 5 As shown, the first row represents the initial temperature of different samples, and the second row represents the photothermal temperature after 5 minutes. It can be seen that nano-silver particles can increase the photothermal temperature of multilayer graphene.

[0090] In summary, this invention utilizes glucose to reduce silver ions and the oxidation sites of multilayer graphene to prepare nano-silver-loaded multilayer graphene powder. When light irradiates the graphene surface, photon energy is absorbed and converted into electrical energy, exciting free electrons in the graphene. These free electrons move within the material and interact with the crystal lattice, thereby generating heat. The use of multilayer graphene increases the probability of π-π* electron transitions, resulting in better photothermal properties. Furthermore, based on the plasmon resonance (LSPR) effect of nano-silver particles, incident light can be absorbed to excite LSPR, and after decay, high-energy hot electrons are generated on the surface of metal nanoparticles. Smaller metal nanoparticles are more likely to generate high-energy hot electrons, and loading them with multilayer graphene can synergistically enhance the photothermal effect. Then, utilizing the Marangoni capillary effect, a micro-protrusion superhydrophobic structure is formed on the PDMS surface through a one-step powder spraying method. This method fully utilizes the synergistic photothermal effect of graphene and nano-silver particles. The superhydrophobic coating preparation process is simple, environmentally friendly, and suitable for large-scale popularization and application.

[0091] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for preparing a flexible superhydrophobic anti-icing coating, characterized in that, Includes the following steps: Preparation of nano-silver supported multilayer graphene: PVP solution and multilayer graphene suspension were mixed evenly, glucose was added and stirred evenly. When the temperature of the suspension reached 20-30℃, silver ammonia solution was added to react. After the reaction was completed, the nano-silver supported multilayer graphene product was obtained by centrifugation. The product was then washed with pure water or ethanol and dried in an oven for later use. Preparation of flexible superhydrophobic layer: A mixture of PDMS and PDMS curing agent is coated on the surface of a glass slide. Then, nano-loaded multilayer graphene powder is uniformly sprayed onto the surface of the uncured PDMS and PDMS curing agent mixture using a spray gun. Finally, it is placed in an oven for curing to obtain a flexible superhydrophobic anti-icing coating.

2. The method for preparing a flexible superhydrophobic anti-icing coating according to claim 1, characterized in that, The silver ammonia solution is prepared by adding 2.0 wt% ammonia solution to a 0.8–2.0 wt% silver nitrate solution until the brown precipitate just disappears.

3. The method for preparing a flexible superhydrophobic anti-icing coating according to claim 1, characterized in that, When preparing nano-silver supported multilayer graphene, the concentration of the PVP solution is 2-4 mg / ml, and the concentration of the multilayer graphene suspension is 0.1-0.5 mg / ml.

4. The method for preparing a flexible superhydrophobic anti-icing coating according to claim 1, characterized in that, When preparing nano-silver supported multilayer graphene, the reaction time after adding silver ammonia solution is 3 to 10 minutes.

5. The method for preparing a flexible superhydrophobic anti-icing coating according to claim 1, characterized in that, When preparing nano-silver supported multilayer graphene, the centrifugal separation speed is 4000-6000 rpm.

6. The method for preparing a flexible superhydrophobic anti-icing coating according to claim 1, characterized in that, When preparing nano-silver supported multilayer graphene, the drying temperature in the oven is set to 50–100℃.

7. The method for preparing a flexible superhydrophobic anti-icing coating according to claim 1, characterized in that, The ratio of PDMS to PDMS curing agent is (2-5):(0.2-0.5).

8. The method for preparing a flexible superhydrophobic anti-icing coating according to claim 1, characterized in that, When preparing a flexible superhydrophobic layer, the nozzle diameter of the spray gun used is 0.5–1.5 mm, and the spraying distance is 10–30 cm.

9. The method for preparing a flexible superhydrophobic anti-icing coating according to claim 1, characterized in that, When preparing the flexible superhydrophobic layer, the curing temperature in the oven is 40-70℃, and the curing time is 1-5 hours.

10. A flexible superhydrophobic anti-icing coating, characterized in that, It is prepared by the preparation method described in any one of claims 1 to 9.

Images