Composition for photo-thermal anti-icing coating, photo-thermal anti-icing coating as well as preparation method and application of photo-thermal anti-icing coating

Abstract

The invention relates to the technical field of lightning protection of wind driven generators, and discloses a composition for a photo-thermal anti-icing coating, the photo-thermal anti-icing coating and a preparation method and application of the photo-thermal anti-icing coating. The composition contains silicon dioxide, molybdenum disulfide, epoxy resin and a resin curing agent, on the basis of the total weight of the composition, the content of the silicon dioxide is 22-34 wt%, the content of the molybdenum disulfide is 13-23 wt%, the content of the epoxy resin is 44-50 wt%, and the content of the resin curing agent is 8-15 wt%; the silicon dioxide is hydrophobic silicon dioxide. The photo-thermal anti-icing coating provided by the invention has hydrophobicity, wear resistance and photo-thermal property, has the effects of active deicing and passive anti-icing at the same time, and is beneficial to safe and stable operation of a fan in a low-temperature and high-humidity environment when being applied to a fan blade.

Description

Technical Field

[0001] This invention relates to the field of lightning protection technology for wind turbines, specifically to a composition for a photothermal anti-icing coating, a photothermal anti-icing coating, its preparation method, and its application. Background Technology

[0002] Due to increasing energy demand and the need for environmental protection, the use of renewable energy technologies is becoming increasingly widespread. Wind energy, as a sustainable energy source, has enormous potential for development. However, wind turbines operating in low-temperature and high-humidity conditions are susceptible to blade icing, which can disrupt their normal operation. Blade icing alters aerodynamic characteristics, increasing surface roughness, drag, and power loss, and can even cause resonance between the tower and the rotor. Mild blade icing reduces turbine performance, while severe icing can lead to a significant decrease in power generation efficiency, reduced turbine lifespan, shutdowns, collapses, and injuries from icing blade detachment, all of which can impact wind power equipment and personnel safety.

[0003] Current wind turbine blade anti-icing and de-icing technologies fall into two categories: active and passive. Active de-icing technology mainly relies on manual labor and de-icing equipment, achieving significant overall results, but it consumes a large amount of energy and poses potential safety risks to construction workers during the de-icing process. Passive anti-icing research on wind turbine blades focuses on preventing or mitigating icing through the properties of special agents. Hydrophobic anti-icing coatings for wind turbine blades are a research hotspot in this field. Furthermore, compared to active de-icing methods, hydrophobic coatings offer a series of advantages, including maintenance-free operation, convenient installation, low energy consumption, and low cost. They also eliminate the need for personnel intervention during the anti-icing process, ensuring personal safety.

[0004] Therefore, in order to address the problem of wind turbine blade icing, a photothermal anti-icing coating for wind turbine blades that integrates active de-icing and passive anti-icing has been developed. This coating not only improves the anti-icing capability of wind turbine blades in icing-prone environments and enables rapid de-icing after icing occurs, but also eliminates the need for de-icing equipment and manual operation, greatly reducing potential safety risks. Summary of the Invention

[0005] The purpose of this invention is to provide a photothermal anti-icing coating that combines anti-icing capability with rapid de-icing capability.

[0006] To achieve the above objectives, a first aspect of the present invention provides a composition for photothermal anti-icing coating, the composition comprising silicon dioxide, molybdenum disulfide, epoxy resin and resin curing agent; Based on the total weight of the composition, the content of silica is 22-34 wt%, the content of molybdenum disulfide is 13-23 wt%, the content of epoxy resin is 44-50 wt%, and the content of resin curing agent is 8-15 wt%; the silica is hydrophobic silica.

[0007] A second aspect of the present invention provides a method for preparing a photothermal anti-icing coating, the method comprising using the components of the composition described in the first aspect of the present invention, including: (1) In the presence of solvent I, silicon dioxide and molybdenum disulfide are first mixed to obtain solution A; and In the presence of solvent II, epoxy resin and resin curing agent are mixed for the second time to obtain solution B; (2) Mix the solution A and the solution B in a third mixing process to obtain an anti-icing coating; (3) Spray the anti-icing coating onto the substrate surface to form the photothermal anti-icing coating.

[0008] A third aspect of the present invention provides a photothermal anti-icing coating prepared by the method described in the second aspect.

[0009] The fourth aspect of the present invention provides the application of the photothermal anti-icing coating described in the third aspect in preventing icing on material surfaces.

[0010] Through the above technical solution, the present invention has at least the following advantages: The photothermal anti-icing coating provided by this invention contains hydrophobic silica, thus possessing excellent passive anti-icing capabilities by inhibiting water droplet adhesion and icing. It also contains molybdenum disulfide, thus possessing excellent active photothermal de-icing capabilities by converting light energy into heat energy. It is an anti-icing coating that combines hydrophobicity, wear resistance, and photothermal properties, integrating active de-icing and passive anti-icing functions. Applying it to wind turbine blades is beneficial for the safe and stable operation of wind turbines in low-temperature and high-humidity environments. Detailed Implementation

[0011] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0012] As mentioned above, a first aspect of the present invention provides a composition for photothermal anti-icing coating, the composition comprising silica, molybdenum disulfide, epoxy resin and resin curing agent; Based on the total weight of the composition, the content of silica is 22-34 wt%, the content of molybdenum disulfide is 13-23 wt%, the content of epoxy resin is 44-50 wt%, and the content of resin curing agent is 8-15 wt%; the silica is hydrophobic silica.

[0013] Preferably, the grafting rate of hydrophobic groups in the hydrophobic silica is ≥70wt%.

[0014] In this invention, the grafting rate of the hydrophobic group refers to the proportion of the content of the hydrophobic group in the hydrophobic silica to the total mass of the hydrophobic silica.

[0015] More preferably, the hydrophobic group is selected from at least one of methyl and ethyl groups.

[0016] Preferably, the hydrophobic silica has a weight-average diameter of 15-20 nm.

[0017] Preferably, the molybdenum disulfide has an average particle size of 1-5 μm.

[0018] Preferably, the epoxy value of the epoxy resin is 0.3-0.6 eq / 100g.

[0019] More preferably, the epoxy resin is selected from at least one of epoxy resin E-51, epoxy resin E-44, and epoxy resin E-42.

[0020] Preferably, the resin curing agent is selected from at least one of resin curing agent T-31, resin curing agent X-89, and resin curing agent 703.

[0021] In a preferred embodiment, the mass ratio of the epoxy resin to the resin curing agent is 1:0.2-0.3.

[0022] As previously described, a second aspect of the present invention provides a method for preparing a photothermal anti-icing coating, the method comprising using the components of the composition described in the first aspect of the present invention, including: (1) In the presence of solvent I, silicon dioxide and molybdenum disulfide are first mixed to obtain solution A; and In the presence of solvent II, epoxy resin and resin curing agent are mixed for the second time to obtain solution B; (2) Mix the solution A and the solution B in a third mixing process to obtain an anti-icing coating; (3) Spray the anti-icing coating onto the substrate surface to form the photothermal anti-icing coating.

[0023] Preferably, in step (1), the solvent I is selected from at least one of anhydrous ethanol and anhydrous isopropanol.

[0024] Preferably, in step (2), solvent II is selected from at least one of anhydrous ethanol and anhydrous isopropanol.

[0025] More preferably, based on the total mass of the silica, the molybdenum disulfide, the epoxy resin and the resin curing agent, the sum of the amounts of solvent I and solvent II is 10-15 wt%.

[0026] Preferably, the substrate surface is cleaned and dried before the spraying operation. Specifically, the substrate surface is first rinsed with water, then ultrasonically cleaned, and finally dried for use; the rinsing, ultrasonic cleaning, and drying times are all 3-5 minutes.

[0027] Preferably, in step (3), the spraying conditions include: spraying air pressure of 0.2-0.3MPa and spraying distance of 40-50cm.

[0028] More preferably, the number of spraying operations is 4-5.

[0029] In a preferred embodiment, after the spraying operation is completed, the substrate is first heat-treated and then naturally cooled at 20-40°C; the conditions for the heat treatment include: temperature of 180-220°C and time of 1-2 hours.

[0030] As previously described, a third aspect of the present invention provides a photothermal anti-icing coating prepared by the method described in the second aspect.

[0031] As previously described, the fourth aspect of the present invention provides the application of the photothermal anti-icing coating described in the third aspect in preventing icing on material surfaces.

[0032] Preferably, the application is in preventing icing on the surface of wind turbine blades.

[0033] The present invention will be described in detail below through examples. In the following examples, the raw materials and equipment used are all commercially available products, and the solvents used are all analytical grade.

[0034] Silica: Hydrophobic silica with a hydrophobic group grafting rate of 75 wt% and a weight average diameter of 20 nm, purchased from Evonik Industries, Germany. Molybdenum disulfide: with an average particle size of 5 μm, purchased from Aladdin Reagent (Shanghai) Co., Ltd. Epoxy resin: Epoxy resin E-51, with an epoxy value of 0.41-0.47 eq / 100g, was purchased from Sinopec Baling Petrochemical Co., Ltd. Epoxy resin E-44, with an epoxy value of 0.4-0.48 eq / 100g, was purchased from Sinopec Baling Petrochemical Co., Ltd. Resin curing agent: Resin curing agent T-31, purchased from Cardley Chemical (Zhuhai) Co., Ltd.

[0035] Example 1 (1) Add 0.5g of silicon dioxide to anhydrous ethanol, first ultrasonically disperse for 0.5h, then stir for 0.5h; add 0.3g of molybdenum disulfide for the first mixing, continue ultrasonically disperse for 0.5h, then stir for 0.5h to obtain solution A; and Add 1g of epoxy resin (specifically epoxy resin E-51) to anhydrous ethanol, first ultrasonically disperse for 0.5min, then stir for 0.5min; add 0.2g of resin curing agent for a second mixing, continue ultrasonically disperse for 0.5min, then stir for 0.5min to obtain solution B; (2) Mix solution A and solution B obtained in step (1) for the third time, disperse ultrasonically for 0.5 min, and then stir for 0.5 min to obtain anti-icing coating; (3) First, rinse the substrate surface (specifically the fan blades) with pure water, then perform ultrasonic cleaning, and finally dry; the rinsing, ultrasonic cleaning and drying are all performed for 3 minutes each. (4) Using a spraying device, the anti-icing coating obtained in step (2) is sprayed onto the substrate surface treated in step (3); the spraying pressure is 0.3 MPa, the spraying distance is 40 cm, and the spraying is repeated 4 times; after the spraying is completed, the coating is heat-treated at 200℃ for 2 hours and then naturally cooled at 25℃ to obtain a photothermal anti-icing coating.

[0036] In this embodiment, the composition for photothermal anti-icing coating contains 25 wt% silica, 15 wt% molybdenum disulfide, 50 wt% epoxy resin, and 10 wt% resin curing agent.

[0037] Example 2 (1) Add 0.75g of silicon dioxide to anhydrous ethanol, first ultrasonically disperse for 0.5h, then stir for 0.5h; add 0.3g of molybdenum disulfide for the first mixing, continue ultrasonically disperse for 0.5h, then stir for 0.5h to obtain solution A; and Add 1g of epoxy resin (specifically epoxy resin E-51) to anhydrous ethanol, first ultrasonically disperse for 0.5min, then stir for 0.5min; add 0.2g of resin curing agent for a second mixing, continue ultrasonically disperse for 0.5min, then stir for 0.5min to obtain solution B; (2) Mix solution A and solution B obtained in step (1) for the third time, disperse ultrasonically for 0.5 min, and then stir for 0.5 min to obtain anti-icing coating; (3) First, rinse the substrate surface (specifically the fan blades) with pure water, then perform ultrasonic cleaning, and finally dry; the rinsing, ultrasonic cleaning and drying are all performed for 3 minutes each. (4) Using a spraying device, the anti-icing coating obtained in step (2) is sprayed onto the substrate surface treated in step (3); the spraying pressure is 0.3 MPa, the spraying distance is 40 cm, and the spraying is repeated 4 times; after the spraying is completed, the coating is heat-treated at 200℃ for 2 hours and then naturally cooled at 25℃ to obtain a photothermal anti-icing coating.

[0038] In this embodiment, the composition for photothermal anti-icing coating contains 33.33 wt% silica, 13.33 wt% molybdenum disulfide, 44.44 wt% epoxy resin, and 8.89 wt% resin curing agent.

[0039] Example 3 (1) Add 0.5g of silica to anhydrous ethanol, first ultrasonically disperse for 0.5h, then stir for 0.5h; add 0.4g of molybdenum disulfide for the first mixing, continue ultrasonically disperse for 0.5h, then stir for 0.5h to obtain solution A; and Add 1g of epoxy resin (specifically epoxy resin E-51) to anhydrous ethanol, first ultrasonically disperse for 0.5min, then stir for 0.5min; add 0.2g of resin curing agent for a second mixing, continue ultrasonically disperse for 0.5min, then stir for 0.5min to obtain solution B; (2) Mix solution A and solution B obtained in step (1) for the third time, disperse ultrasonically for 0.5 min, and then stir for 0.5 min to obtain anti-icing coating; (3) First, rinse the substrate surface (specifically the fan blades) with pure water, then perform ultrasonic cleaning, and finally dry; the rinsing, ultrasonic cleaning and drying are all performed for 3 minutes each. (4) Using a spraying device, the anti-icing coating obtained in step (2) is sprayed onto the substrate surface treated in step (3); the spraying pressure is 0.3 MPa, the spraying distance is 40 cm, and the spraying is repeated 4 times; after the spraying is completed, the coating is heat-treated at 200℃ for 2 hours and then naturally cooled at 25℃ to obtain a photothermal anti-icing coating.

[0040] In this embodiment, the composition for photothermal anti-icing coating contains 23.81 wt% silica, 19.04 wt% molybdenum disulfide, 47.62 wt% epoxy resin, and 9.52 wt% resin curing agent.

[0041] Example 4 (1) Add 0.5g of silicon dioxide to anhydrous ethanol, first ultrasonically disperse for 0.5h, then stir for 0.5h; add 0.5g of molybdenum disulfide for the first mixing, continue ultrasonically disperse for 0.5h, then stir for 0.5h to obtain solution A; and Add 1g of epoxy resin (specifically epoxy resin E-51) to anhydrous ethanol, first ultrasonically disperse for 0.5min, then stir for 0.5min; add 0.2g of resin curing agent for a second mixing, continue ultrasonically disperse for 0.5min, then stir for 0.5min to obtain solution B; (2) Mix solution A and solution B obtained in step (1) for the third time, disperse ultrasonically for 0.5 min, and then stir for 0.5 min to obtain anti-icing coating; (3) First, rinse the substrate surface (specifically the fan blades) with pure water, then perform ultrasonic cleaning, and finally dry; the rinsing, ultrasonic cleaning and drying are all performed for 3 minutes each. (4) Using a spraying device, the anti-icing coating obtained in step (2) is sprayed onto the substrate surface treated in step (3); the spraying pressure is 0.3 MPa, the spraying distance is 40 cm, and the spraying is repeated 4 times; after the spraying is completed, the coating is heat-treated at 200℃ for 2 hours and then naturally cooled at 25℃ to obtain a photothermal anti-icing coating.

[0042] In this embodiment, the composition for photothermal anti-icing coating contains 22.73 wt% silica, 22.73 wt% molybdenum disulfide, 45.45 wt% epoxy resin, and 9.09 wt% resin curing agent.

[0043] Example 5 (1) Add 0.5g of silicon dioxide to anhydrous ethanol, first ultrasonically disperse for 0.5h, then stir for 0.5h; add 0.3g of molybdenum disulfide for the first mixing, continue ultrasonically disperse for 0.5h, then stir for 0.5h to obtain solution A; and 1g of epoxy resin (specifically epoxy resin E-44) was added to anhydrous ethanol, ultrasonically dispersed for 0.5min, and then stirred for 0.5min; 0.2g of resin curing agent was added for a second mixing, ultrasonically dispersed for 0.5min, and then stirred for 0.5min to obtain solution B; (2) Mix solution A and solution B obtained in step (1) for the third time, disperse ultrasonically for 0.5 min, and then stir for 0.5 min to obtain anti-icing coating; (3) First, rinse the substrate surface (specifically the fan blades) with pure water, then perform ultrasonic cleaning, and finally dry; the rinsing, ultrasonic cleaning and drying are all performed for 3 minutes each. (4) Using a spraying device, the anti-icing coating obtained in step (2) is sprayed onto the substrate surface treated in step (3); the spraying pressure is 0.3 MPa, the spraying distance is 40 cm, and the spraying is repeated 4 times; after the spraying is completed, the coating is heat-treated at 200℃ for 2 hours and then naturally cooled at 25℃ to obtain a photothermal anti-icing coating.

[0044] In this embodiment, the composition for photothermal anti-icing coating contains 25 wt% silica, 15 wt% molybdenum disulfide, 50 wt% epoxy resin, and 10 wt% resin curing agent.

[0045] Example 6 (1) Add 0.5g of silicon dioxide to anhydrous ethanol, first ultrasonically disperse for 0.5h, then stir for 0.5h; add 0.3g of molybdenum disulfide for the first mixing, continue ultrasonically disperse for 0.5h, then stir for 0.5h to obtain solution A; and Add 1g of epoxy resin (specifically epoxy resin E-51) to anhydrous ethanol, first ultrasonically disperse for 0.5min, then stir for 0.5min; add 0.3g of resin curing agent for a second mixing, continue ultrasonically disperse for 0.5min, then stir for 0.5min to obtain solution B; (2) Mix solution A and solution B obtained in step (1) for the third time, disperse ultrasonically for 0.5 min, and then stir for 0.5 min to obtain anti-icing coating; (3) First, rinse the substrate surface (specifically the fan blades) with pure water, then perform ultrasonic cleaning, and finally dry; the rinsing, ultrasonic cleaning and drying are all performed for 3 minutes each. (4) Using a spraying device, the anti-icing coating obtained in step (2) is sprayed onto the substrate surface treated in step (3); the spraying pressure is 0.3 MPa, the spraying distance is 40 cm, and the spraying is repeated 4 times; after the spraying is completed, the coating is heat-treated at 200℃ for 2 hours and then naturally cooled at 25℃ to obtain a photothermal anti-icing coating.

[0046] In this embodiment, the composition for photothermal anti-icing coating contains 23.81 wt% silica, 14.29 wt% molybdenum disulfide, 47.62 wt% epoxy resin, and 14.29 wt% resin curing agent.

[0047] Comparative Example 1 (1) Add 0.25g of silicon dioxide to anhydrous ethanol, first ultrasonically disperse for 0.5h, then stir for 0.5h; add 0.3g of molybdenum disulfide for the first mixing, continue ultrasonic dispersion for 0.5h, then stir for 0.5h to obtain solution A; and Add 1g of epoxy resin (specifically epoxy resin E-51) to anhydrous ethanol, first ultrasonically disperse for 0.5min, then stir for 0.5min; add 0.2g of resin curing agent for a second mixing, continue ultrasonically disperse for 0.5min, then stir for 0.5min to obtain solution B; (2) Mix solution A and solution B obtained in step (1) for the third time, disperse ultrasonically for 0.5 min, and then stir for 0.5 min to obtain anti-icing coating; (3) First, rinse the substrate surface (specifically the fan blades) with pure water, then perform ultrasonic cleaning, and finally dry; the rinsing, ultrasonic cleaning and drying are all performed for 3 minutes each. (4) Using a spraying device, the anti-icing coating obtained in step (2) is sprayed onto the substrate surface treated in step (3); the spraying pressure is 0.3 MPa, the spraying distance is 40 cm, and the spraying is repeated 4 times; after the spraying is completed, the coating is heat-treated at 200℃ for 2 hours and then naturally cooled at 25℃ to obtain a photothermal anti-icing coating.

[0048] In this embodiment, the composition for photothermal anti-icing coating contains 14.29 wt% silica, 17.14 wt% molybdenum disulfide, 57.14 wt% epoxy resin, and 11.43 wt% resin curing agent.

[0049] Comparative Example 2 (1) Add 0.5g of silica to anhydrous ethanol, first ultrasonically disperse for 0.5h, then stir for 0.5h to obtain solution A; and Add 1g of epoxy resin (specifically epoxy resin E-51) to anhydrous ethanol, first ultrasonically disperse for 0.5min, then stir for 0.5min; add 0.2g of resin curing agent for a second mixing, continue ultrasonically disperse for 0.5min, then stir for 0.5min to obtain solution B; (2) Mix solution A and solution B obtained in step (1) for the third time, disperse ultrasonically for 0.5 min, and then stir for 0.5 min to obtain anti-icing coating; (3) First, rinse the substrate surface (specifically the fan blades) with pure water, then perform ultrasonic cleaning, and finally dry; the rinsing, ultrasonic cleaning and drying are all performed for 3 minutes each. (4) Using a spraying device, the anti-icing coating obtained in step (2) is sprayed onto the substrate surface treated in step (3); the spraying pressure is 0.3 MPa, the spraying distance is 40 cm, and the spraying is repeated 4 times; after the spraying is completed, the coating is heat-treated at 200℃ for 2 hours and then naturally cooled at 25℃ to obtain a photothermal anti-icing coating.

[0050] In this embodiment, the composition for photothermal anti-icing coating contains 29.41 wt% silica, 58.85 wt% epoxy resin, and 11.76 wt% resin curing agent.

[0051] Test case The performance test data of the photothermal anti-icing coatings in the examples and comparative examples are shown in Table 1.

[0052] The water contact angle was tested using a contact angle meter. A 2 μL droplet of deionized water was placed on the coating surface, and the angle between the droplet profile and the baseline was measured using optical imaging technology. The static contact angle value was recorded. The test was conducted at room temperature (25 ± 2 °C), and at least 5 different locations were measured for each sample. The average value was taken as the final result.

[0053] This invention uses a sandpaper friction experiment to simulate the wear of wind and sand. Specifically, the sandpaper friction experiment involves placing a 200g weight on the coating, then placing the coating on sandpaper with a roughness of 800 grit, and pulling the substrate forward on the sandpaper. The friction distance for each round is 20cm. After the friction is completed, the water contact angle of the coating surface is measured.

[0054] This invention employs a photothermal heating experiment to test the photothermal properties of the coating. Specifically, the coating is placed 60 cm away from a light source. The light source is a xenon lamp with a spectrum close to that of sunlight, a power of 200 W, and an average light intensity of 10,000 lx. The light source is then turned on to directly illuminate the coating surface for 90 minutes. The surface temperature of the coating after illumination is measured. The ambient temperature remains constant at 21°C throughout the photothermal heating experiment.

[0055] This invention uses a light-induced de-icing experiment to test the photothermal de-icing performance of the coating. Specifically, 100 mg of ice is pre-attached to the coating surface, the experimental temperature is set to -5℃, and a xenon lamp with a power of 200W and an average light intensity of 10000 lx is placed at a distance of 60 cm from the coating for illumination. The time for the ice on the coating to melt is recorded.

[0056] Table 1

[0057] The results above show that the photothermal anti-icing coating provided by the present invention has superior hydrophobic and photothermal properties, and also has the effects of active de-icing and passive anti-icing. Applying it to wind turbine blades is beneficial to the safe and stable operation of wind turbines in low temperature and high humidity environments.

[0058] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A composition for a photothermal de-icing coating, characterized by, The composition contains silica, molybdenum disulfide, epoxy resin and resin curing agent; The content of the silica is 22-34 wt%, the content of the molybdenum disulfide is 13-23 wt%, the content of the epoxy resin is 44-50 wt%, and the content of the resin curing agent is 8-15 wt%, based on the total weight of the composition; the silica is hydrophobic silica.

2. The composition of claim 1, wherein, The grafting rate of the hydrophobic group in the hydrophobic silica is ≥70 wt%. And / or, the weight average diameter of the hydrophobic silica is 15-20 nm.

3. The composition of claim 1, wherein, The average particle size of the molybdenum disulfide is 1-5 μm.

4. The composition according to any one of claims 1 to 3, characterized in that, The epoxy value of the epoxy resin is 0.3-0.6 eq / 100g. And / or, the epoxy resin is selected from at least one of epoxy resin E-51, epoxy resin E-44 and epoxy resin E-42.

5. The composition according to any one of claims 1 to 3, wherein The resin curing agent is selected from at least one of resin curing agent T-31, resin curing agent X-89 and resin curing agent 703.

6. The composition according to any one of claims 1 to 3, wherein The content mass ratio of the epoxy resin to the resin curing agent is 1:0.2-0.

3.

7. A method of making a photothermal de-icing coating, characterized by, The method applies each component in the composition of any one of claims 1-6, comprising: (1) mixing the silica and the molybdenum disulfide in the presence of solvent I to obtain solution A; and mixing the epoxy resin and the resin curing agent in the presence of solvent II to obtain solution B; (2) mixing the solution A and the solution B to obtain an anti-icing coating; (3) spraying the anti-icing coating on the surface of a substrate to form the photothermal anti-icing coating.

8. The method of claim 7, wherein, In step (3), the spraying conditions include: spraying air pressure is 0.2-0.3 MPa, and spraying distance is 40-50 cm.

9. The photothermal anti-icing coating prepared by the method of claim 7 or 8.

10. The use of the photothermal anti-icing coating of claim 9 in preventing icing on the surface of a material. And / or, the use is the use in preventing icing on the surface of a wind turbine blade.

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