An anti-icing coating material, a preparation method and application thereof

Abstract

The application provides an anti-icing coating and a preparation method and application thereof, and belongs to the technical field of anti-icing coatings. The anti-icing coating is optimized, the synergistic effect of (4-perfluorooctylphenyl) triethoxysilane, hexafluorobutyl methacrylate and hexamethylene diisocyanate is utilized, the water contact angle of the anti-icing coating can be greatly improved, the hydrophobic property is improved, and good anti-icing effect is achieved; the micron-nanometer concave-convex structure is formed on the surface of the coating layer formed by the anti-icing coating by adding nanoscale hydrophobic particles, the self-cleaning effect of imitation lotus leaf is realized, the adhesion of water droplets, water mist and dirt on the surface is effectively prevented, and the occurrence of icing phenomenon is further prevented.

Description

Technical Field

[0001] This invention relates to the field of anti-icing coating technology, and in particular to an anti-icing coating, its preparation method, and its application. Background Technology

[0002] In subtropical regions, winters are cold, with temperatures often below 0°C. This makes surfaces such as roads, bridges, high-voltage power lines, and wind power equipment prone to icing, leading to various problems. For example, icing on roads and bridges poses serious traffic safety hazards, while icing on high-voltage power lines and wind power equipment reduces heat transfer efficiency, increases pressure loss, and significantly impacts the system. Simultaneously, some areas frequently experience freezing rain, causing severe icing and frost problems in the power, energy, communications, and bridge sectors. This leads to severe icing on high-voltage transmission lines, towers, and bridge cables, resulting in breakage, collapse, and falling ice, causing significant economic losses and major safety hazards. Currently, the main method used to address these problems is to conduct regular or irregular de-icing and defrosting operations. This not only consumes a large amount of energy and manpower but also easily causes environmental pollution due to the spraying of anti-icing agents during the process.

[0003] Anti-icing coatings are an important means of preventing icing, but currently available anti-icing coatings rely solely on their hydrophobicity to minimize icing, resulting in weak anti-icing capabilities. Furthermore, due to their weak adhesion to the substrate, anti-icing coatings are prone to peeling and damage, requiring repeated application and increasing treatment costs.

[0004] Therefore, how to improve the anti-icing performance and adhesion performance of anti-icing coatings has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide an anti-icing coating, its preparation method, and its application. The anti-icing coating provided by this invention has excellent anti-icing performance and high adhesion to the substrate.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0007] This invention provides an anti-icing coating, comprising, by weight percentage: 30-33% (4-perfluorooctylphenyl)triethoxysilane, 18-23% tridecylfluorooctyltriethoxysilane, 3-6% hexafluorobutyl methacrylate, 9-22% hexamethylene diisocyanate, 2-5% dimethylformamide, 12-25% nano-sized hydrophobic particles, 0.3-1.5% graphene oxide, and the balance being an organic solvent.

[0008] Preferably, the anti-icing coating comprises, by weight percentage: 28-34% (4-perfluorooctylphenyl)triethoxysilane, 16-25% tridecylfluorooctyltriethoxysilane, 4-5% hexafluorobutyl methacrylate, 10-20% hexamethylene diisocyanate, 3-4% dimethylformamide, 15-22% nano-sized hydrophobic particles, 0.5-1.2% graphene oxide, and the balance being an organic solvent.

[0009] Preferably, the nanoscale hydrophobic particles include nano-titanium dioxide and nano-silica.

[0010] Preferably, the nano-titanium dioxide has a particle size of 10-20 nm, the nano-silica has a particle size of 1-100 nm, and the nano-silica is spherical or near-spherical in shape.

[0011] Preferably, the mass ratio of the nano-titanium dioxide to the nano-silica is (0.3-1.7):1.

[0012] Preferably, the organic solvent is acetone or xylene.

[0013] Preferably, the anti-icing coating further includes 0.5% to 5% additives.

[0014] Preferably, the additives include one or more of wear-resistant additives, aging-resistant additives, wetting agents, defoamers, and surfactants.

[0015] This invention provides a method for preparing the anti-icing coating described above, comprising the following steps:

[0016] (1) Mix (4-perfluorooctylphenyl)triethoxysilane, hexafluorobutyl methacrylate and an organic solvent to obtain a first mixture;

[0017] (2) After heating the first mixture obtained in step (1) to 35-40°C, add tridecafluorooctyltriethoxysilane and hexamethylene diisocyanate to obtain the second mixture;

[0018] (3) After heating the second mixture obtained in step (2) to 50-60°C, dimethylformamide, nano-sized hydrophobic particles and graphene oxide are added in sequence to obtain an anti-icing coating.

[0019] This invention provides the application of the anti-icing coating described in the above technical solution or the anti-icing coating prepared by the preparation method described in the above technical solution in roads, bridges, high-voltage power lines and wind power generation equipment.

[0020] This invention provides an anti-icing coating, comprising, by weight percentage: 30-33% (4-perfluorooctylphenyl)triethoxysilane, 18-23% tridecafluorooctyltriethoxysilane, 3-6% hexafluorobutyl methacrylate, 9-22% hexamethylene diisocyanate, 2-5% dimethylformamide, 12-25% nano-sized hydrophobic particles, 0.3-1.5% graphene oxide, and the balance being an organic solvent. This invention optimizes the composition of the anti-icing coating, utilizing the synergistic effect of (4-perfluorooctylphenyl)triethoxysilane, hexafluorobutyl methacrylate, and hexamethylene diisocyanate to significantly increase the water contact angle of the anti-icing coating, thereby improving its hydrophobic properties and achieving a good anti-icing effect. The addition of nano-sized hydrophobic particles creates a micron-nano-scale uneven structure on the surface of the anti-icing coating, achieving a self-cleaning effect similar to a lotus leaf, effectively preventing the adhesion of water droplets, water mist, and dirt to its surface, further preventing icing. The results of the embodiments show that the water contact angle of the anti-icing coating provided by the present invention can reach more than 160°, the acid and alkali resistance are both greater than 240h, the aging resistance is greater than 5000h, the adhesion is level 2, and the anti-icing time exceeds 2500h. Detailed Implementation

[0021] This invention provides an anti-icing coating, comprising, by weight percentage: 28-34% (4-perfluorooctylphenyl)triethoxysilane, 16-25% tridecylfluorooctyltriethoxysilane, 3-6% hexafluorobutyl methacrylate, 9-22% hexamethylene diisocyanate, 2-5% dimethylformamide, 12-25% nano-sized hydrophobic particles, 0.3-1.5% graphene oxide, and the balance being an organic solvent.

[0022] The anti-icing coating provided by this invention comprises, by weight percentage, 28-34% (4-perfluorooctylphenyl)triethoxysilane, preferably 30-33%, and more preferably 31-32%. In this invention, the (4-perfluorooctylphenyl)triethoxysilane is preferably sourced from Shanghai Mairui Chemical Technology Co., Ltd., with a content of 97 wt% and a molecular formula of C2. 20 H 19 F 17 O3Si. This invention significantly improves the hydrophobic properties of anti-icing coatings by adding (4-perfluorooctylphenyl)triethoxysilane, allowing water droplets formed on the coating surface due to cold weather or freezing rain to slide off quickly, thus preventing the coating surface from freezing.

[0023] The anti-icing coating provided by the present invention comprises 16-25% tridecafluorooctyltriethoxysilane by weight percentage, preferably 18-23%, and more preferably 20-22%. In the present invention, the tridecafluorooctyltriethoxysilane can lower the melting point of the anti-icing coating, thereby avoiding problems such as freezing and cracking of the coating at low temperatures, and improving the weather resistance and service life of the anti-icing coating.

[0024] The anti-icing coating provided by this invention comprises 3-6% hexafluorobutyl methacrylate, preferably 4-5%, by weight percentage. By adding hexafluorobutyl methacrylate, this invention improves the self-cleaning and weather resistance of the anti-icing coating. On the one hand, it removes impurities such as dust and moisture from the coating surface, thus preventing dust adhering to the surface at low temperatures from becoming a moisture accumulation point and causing icing. On the other hand, it prevents the coating from peeling off due to changes in temperature, light, and pH.

[0025] The anti-icing coating provided by this invention comprises, by weight percentage, 9-22% hexamethylene diisocyanate, preferably 10-20%, more preferably 12-18%, and even more preferably 14-16%. By adding hexamethylene diisocyanate, this invention can improve the adhesion performance of the anti-icing coating, thereby increasing the bonding strength between the coating and the substrate, enhancing resistance to external forces, preventing coating peeling, and further improving the hydrophobic and antifreeze properties of the coating.

[0026] The anti-icing coating provided by this invention comprises 2-5% dimethylformamide, preferably 3-4%, by weight percentage. In this invention, dimethylformamide can improve the low-temperature resistance of the anti-icing coating and prevent the coating formed by the anti-icing coating from freezing and cracking at low temperatures.

[0027] The anti-icing coating provided by the present invention comprises 12-25% nano-sized hydrophobic particles by mass percentage, preferably 15-22%, and more preferably 18-20%. In the present invention, the nano-sized hydrophobic particles comprise nano-titanium dioxide and nano-silica; the particle size of the nano-titanium dioxide is preferably 10-20 nm; the particle size of the nano-silica is preferably 1-100 nm; the shape of the nano-silica is preferably spherical or near-spherical; the mass ratio of the nano-titanium dioxide to the nano-silica is preferably (0.3-1.7):1, more preferably (0.5-1.5):1, and even more preferably (0.8-1.2):1. This invention incorporates nano-titanium dioxide and nano-silica, both of which possess excellent hydrophobicity, further reducing the hydrophobicity of the coating and thus lowering the water contact angle, preventing icing on the coating surface at low temperatures. Simultaneously, nano-titanium dioxide is a photocatalyst that generates highly oxidizing free radicals under sunlight, exhibiting excellent bactericidal effects and enhancing the coating's anti-mildew properties. The combination of nano-titanium dioxide and nano-silica creates a micron-nano-uneven structure on the surface of the anti-icing coating, achieving a self-cleaning effect similar to a lotus leaf, effectively preventing the adhesion of water droplets, mist, and dirt, further inhibiting icing. By controlling the shape and particle size of the nano-silica, its surface energy can be reduced. The hydrophobic groups on the nano-silica surface and the uneven micro / nano structure work synergistically to further improve the coating's anti-icing effect.

[0028] The anti-icing coating provided by the present invention comprises 0.3-1.5% graphene oxide, preferably 0.5-1.2%, and more preferably 0.8-1.0% by mass percentage. In the present invention, the addition of a small amount of graphene oxide can further improve the hydrophobic properties of the anti-icing coating.

[0029] The anti-icing coating provided by this invention comprises, by weight percentage, the balance being an organic solvent. In this invention, the organic solvent is preferably acetone or xylene. The addition of an organic solvent facilitates uniform mixing of the components.

[0030] The anti-icing coating provided by this invention preferably further comprises 0.5-5% additives by weight percentage; the additives preferably include one or more of abrasion-resistant additives, aging-resistant additives, wetting agents, defoamers, and surfactants; the abrasion-resistant additives are preferably glass microspheres or polytetrafluoroethylene powder; the aging-resistant additives are preferably anti-thermal-oxidative aging agents or anti-ultraviolet radiation anti-aging agents, more preferably anti-aging agent 4010 or anti-aging agent CPPD; the wetting agent is preferably anionic surfactant or nonionic surfactant, more preferably sodium alkyl sulfonate, sodium alkyl aryl sulfonate, long-chain fatty alcohol polyoxyethylene ether, or alkylphenol polyoxyethylene ether; the defoamer is preferably an organosilicon defoamer, polyether defoamer, or polyether-modified polysiloxane defoamer. By adding additives, this invention can further modify the performance of the anti-icing coating according to environmental and performance requirements, thereby obtaining the desired anti-icing coating. In one embodiment of the present invention, the amount of the auxiliary agent can be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%.

[0031] This invention optimizes the composition of the anti-icing coating by utilizing the synergistic effect of (4-perfluorooctylphenyl)triethoxysilane, hexafluorobutyl methacrylate, and hexamethylene diisocyanate to significantly increase the water contact angle of the anti-icing coating, thereby improving its hydrophobic properties and achieving a good anti-icing effect. By adding nano-scale hydrophobic particles, the coating surface of the anti-icing coating forms a micron-nano-scale uneven structure, achieving a self-cleaning effect similar to that of a lotus leaf, effectively preventing the adhesion of water droplets, water mist, and dirt to its surface, further preventing icing.

[0032] The present invention also provides a method for preparing the anti-icing coating described in the above technical solution, comprising the following steps:

[0033] (1) Mix (4-perfluorooctylphenyl)triethoxysilane, hexafluorobutyl methacrylate and an organic solvent to obtain a first mixture;

[0034] (2) After heating the first mixture obtained in step (1) to 35-40°C, add tridecafluorooctyltriethoxysilane and hexamethylene diisocyanate to obtain the second mixture;

[0035] (3) After heating the second mixture obtained in step (2) to 50-60°C, dimethylformamide, nano-sized hydrophobic particles and graphene oxide are added in sequence to obtain an anti-icing coating.

[0036] In this invention, the preparation of the anti-icing coating is preferably carried out under stirring conditions. This invention does not impose special limitations on the stirring rate and time; based on the technical knowledge of those skilled in the art, the stirring should be sufficient to ensure uniform mixing of the components and prevent solution splashing.

[0037] This invention does not impose any specific limitations on the heating operation, as long as the required temperature is reached. In one embodiment of this invention, the heating method can be water bath heating. By heating during the preparation process, this invention can adjust the viscosity of the mixture, thereby facilitating more uniform mixing of the components.

[0038] In this invention, when the anti-icing coating further includes additives, the additives are preferably added after the addition of graphene oxide.

[0039] The present invention also provides the application of the anti-icing coating described in the above technical solution or the anti-icing coating prepared by the preparation method described in the above technical solution in roads, bridges, high-voltage power lines and wind power generation equipment.

[0040] The present invention does not impose any special limitation on the specific method of application; any coating application method known to those skilled in the art can be used.

[0041] As one embodiment of the present invention, the application preferably includes: cleaning the area to be coated, and then spraying the anti-icing coating onto the area to be coated to obtain an anti-icing coating.

[0042] The technical solutions of this invention will be clearly and completely described below with reference to the embodiments thereof. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0043] Example 1

[0044] An anti-icing coating, by weight percentage, comprises the following components: 34% (4-perfluorooctylphenyl)triethoxysilane, 20% tridecylfluorooctyltriethoxysilane, 5% hexafluorobutyl methacrylate, 12% hexamethylene diisocyanate, 3% dimethylformamide, 15% nano-sized hydrophobic particles, 1% graphene oxide, and the balance acetone.

[0045] The (4-perfluorooctylphenyl)triethoxysilane was obtained from Shanghai Mairui Chemical Technology Co., Ltd., with a content of 97 wt% and a molecular formula of C2. 20 H 19 F 17 O3Si; The nano-scale hydrophobic particles are composed of nano-titanium dioxide and nano-silica, the nano-titanium dioxide has a particle size of 10-20 nm, the nano-silica has a particle size of 1-100 nm, the nano-silica has a spherical shape, and the mass ratio of nano-titanium dioxide to nano-silica is 1:1.

[0046] The method for preparing the anti-icing coating is as follows:

[0047] (1) Mix (4-perfluorooctylphenyl)triethoxysilane, hexafluorobutyl methacrylate and organic solvent and stir until homogeneous to obtain the first mixture;

[0048] (2) After heating the first mixture obtained in step (1) to 40°C in a water bath, add tridecafluorooctyltriethoxysilane and hexamethylene diisocyanate, stir evenly to obtain the second mixture;

[0049] (3) After heating the second mixture obtained in step (2) to 60°C in a water bath, dimethylformamide, nano-sized hydrophobic particles and graphene oxide are added in sequence and stirred evenly to obtain an anti-icing coating.

[0050] Example 2

[0051] The mass percentage of (4-perfluorooctylphenyl)triethoxysilane was 28%, and other conditions were the same as in Example 1.

[0052] Example 3

[0053] The mass percentage of (4-perfluorooctylphenyl)triethoxysilane was 30%, and other conditions were the same as in Example 1.

[0054] Comparative Example 1

[0055] The mass percentage of (4-perfluorooctylphenyl)triethoxysilane was 0%, and other conditions were the same as in Example 1.

[0056] Comparative Example 2

[0057] The mass percentage of (4-perfluorooctylphenyl)triethoxysilane was 10%, and other conditions were the same as in Example 1.

[0058] Comparative Example 3

[0059] The mass percentage of (4-perfluorooctylphenyl)triethoxysilane was 20%, and other conditions were the same as in Example 1.

[0060] The performance of the anti-icing coatings prepared in Examples 1-3 and Comparative Examples 1-3 was tested, and the results are shown in Table 1:

[0061] Table 1. Performance of the anti-icing coatings prepared in Examples 1-3 and Comparative Examples 1-3

[0062] Example Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Water contact angle 165° 159° 161° 118° 135° 142° Acid resistance ＞240h ＞240h ＞240h ＞240h ＞240h ＞240h Alkali resistance ＞240h ＞240h ＞240h ＞240h ＞240h ＞240h Aging resistance ＞5000h ＞5000h ＞5000h ＞5000h ＞5000h ＞5000h Anti-icing time 2643h 2486h 2534h 1502h 1807h 2025h Adhesion Level 2 Level 2 Level 2 Level 2 Level 2 Level 2

[0063] The water contact angle was measured using a contact angle tester.

[0064] The test standard for acid and alkali resistance is GB / T 9264111;

[0065] The test standard for aging resistance is the UV aging test GB / T 14522;

[0066] The test method for anti-icing time is as follows: Place the sample coated with anti-icing coating in an environment with a temperature of -20℃, spray water on the sample surface using a spray device with a water flow rate of 10mL / s, and detect the time when the ice area on the sample surface reaches 5%.

[0067] The standard for adhesion testing is GB / T 1720-1979.

[0068] As shown in Table 1, with the increase of the content of (4-perfluorooctylphenyl)triethoxysilane in the anti-icing coating, the water contact angle of the anti-icing coating shows a significant upward trend, indicating that the addition of (4-perfluorooctylphenyl)triethoxysilane can improve the hydrophobicity of the anti-icing coating, thereby improving its anti-icing effect. When the content of (4-perfluorooctylphenyl)triethoxysilane decreases from 10% to 0, the decrease in the water contact angle of the anti-icing coating increases significantly, and the anti-icing time also shows a significant decline, with the decrease being significantly greater than that when the content decreases from 20% to 10%, indicating that (4-perfluorooctylphenyl)triethoxysilane has a synergistic effect with other components.

[0069] Example 4

[0070] The mass percentage of tridecafluorooctyltriethoxysilane was 16%, and other conditions were the same as in Example 1.

[0071] Example 5

[0072] The mass percentage of tridecafluorooctyltriethoxysilane was 25%, and other conditions were the same as in Example 1.

[0073] Comparative Example 4

[0074] The mass percentage of tridecafluorooctyltriethoxysilane was 0, and other conditions were the same as in Example 1.

[0075] Comparative Example 5

[0076] The mass percentage of tridecafluorooctyltriethoxysilane was 5%, and other conditions were the same as in Example 1.

[0077] The performance of the anti-icing coatings prepared in Examples 1, 4-5 and Comparative Examples 4-5 was tested according to the test standards in Table 1, and the results are shown in Table 2:

[0078] Table 2. Performance of the anti-icing coatings prepared in Examples 1, 4-5 and Comparative Examples 4-5

[0079] Example Example 1 Example 4 Example 5 Comparative Example 4 Comparative Example 5 Water contact angle 165° 160° 163° 145° 152° Acid resistance ＞240h ＞240h ＞240h ＞240h ＞240h Alkali resistance ＞240h ＞240h ＞240h ＞240h ＞240h Aging resistance ＞5000h ＞5000h ＞5000h ＞5000h ＞5000h Anti-icing time 2643h 2526h 2661h 2148h 2309h Adhesion Level 2 Level 2 Level 2 Level 2 Level 2

[0080] As shown in Table 2, with the increase of the content of tridecafluorooctyltriethoxysilane in the anti-icing coating, the water contact angle of the anti-icing coating changes, but the change is small and has little impact on other properties. However, the anti-icing time shows a slight change, indicating that it can further optimize the anti-icing effect of the coating.

[0081] Example 6

[0082] The mass percentage of hexafluorobutyl methacrylate was 3%, and other conditions were the same as in Example 1.

[0083] Example 7

[0084] The mass percentage of hexafluorobutyl methacrylate was 4%, and other conditions were the same as in Example 1.

[0085] Comparative Example 6

[0086] The mass percentage of hexafluorobutyl methacrylate was 0, and other conditions were the same as in Example 1.

[0087] Comparative Example 7

[0088] The mass percentage of hexafluorobutyl methacrylate was 20%, and other conditions were the same as in Example 1.

[0089] The performance of the anti-icing coatings prepared in Examples 1, 6-7 and Comparative Examples 6-7 was tested according to the test standards in Table 1, and the results are shown in Table 3:

[0090] Table 3. Performance of the anti-icing coatings prepared in Examples 1, 6-7 and Comparative Examples 6-7

[0091]

[0092]

[0093] As shown in Table 3, with the increase of hexafluorobutyl methacrylate (HBMA) content in the anti-icing coating, the water contact angle of the anti-icing coating changes, but the change is small and has little impact on other properties. However, the anti-icing time changes, indicating that it can further optimize the anti-icing effect of the coating. Through the comparison of Example 1 and Comparative Examples 6-7, it can be seen that although the anti-icing effect of the coating decreases when no HBMA is added, if too much HBMA is added, the anti-icing performance will also decrease. It is speculated that this is because excessive HBMA will reduce the stability of the system, thereby affecting the anti-icing performance.

[0094] Example 8

[0095] The mass percentage of hexamethylene diisocyanate was 15%, and other conditions were the same as in Example 1.

[0096] Example 9

[0097] The mass percentage of hexamethylene diisocyanate was 20%, and other conditions were the same as in Example 1.

[0098] Comparative Example 8

[0099] The mass percentage of hexamethylene diisocyanate was 0, and other conditions were the same as in Example 1.

[0100] Comparative Example 9

[0101] The mass percentage of hexamethylene diisocyanate was 3%, and other conditions were the same as in Example 1.

[0102] The performance of the anti-icing coatings prepared in Examples 1, 8-9 and Comparative Examples 8-9 was tested according to the test standards in Table 1, and the results are shown in Table 4:

[0103] Table 4. Performance of the anti-icing coatings prepared in Examples 1, 8-9 and Comparative Examples 8-9

[0104] Example Example 1 Example 8 Example 9 Comparative Example 8 Comparative Example 9 Water contact angle 165° 166° 166° 142° 152° Acid resistance ＞240h ＞240h ＞240h ＞240h ＞240h Alkali resistance ＞240h ＞240h ＞240h ＞240h ＞240h Aging resistance ＞5000h ＞5000h ＞5000h ＞5000h ＞5000h Anti-icing time 2643h 2616h 2653h 2016h 2326h Adhesion Level 2 Level 2 Level 2 Level 2 Level 2

[0105] As shown in Table 4, with the increase of hexamethylene diisocyanate content in the anti-icing coating, the water contact angle of the anti-icing coating changes, but the change is small, and it has little impact on other properties. However, the anti-icing time changes, indicating that it can further optimize the anti-icing effect of the coating. The comparison between Example 1 and Comparative Examples 8-9 shows that although the anti-icing effect of the coating is significantly reduced when hexamethylene diisocyanate is not added or when the amount added is small, the reduction is particularly significant when it is not added. This indirectly proves that hexamethylene diisocyanate causes the synergistic effect to disappear, thus significantly reducing the anti-icing effect of the coating.

[0106] Example 10

[0107] The mass percentage of the nanoscale hydrophobic particles was 25%, and other conditions were the same as in Example 1.

[0108] Comparative Example 10

[0109] The mass percentage of the nanoscale hydrophobic particles was 0, and other conditions were the same as in Example 1.

[0110] Comparative Example 11

[0111] The nanoscale hydrophobic particles are composed of nano-titanium dioxide, and other conditions are the same as in Example 1.

[0112] Comparative Example 12

[0113] The nanoscale hydrophobic particles are composed of nano-silica, and other conditions are the same as in Example 1.

[0114] Comparative Example 13

[0115] The mass percentage of the graphene oxide was 0, and other conditions were the same as in Example 1.

[0116] The performance of the anti-icing coatings prepared in Examples 1, 10 and Comparative Examples 10-13 was tested according to the test standards in Table 1, and the results are shown in Table 5.

[0117] Table 5. Performance of the anti-icing coatings prepared in Examples 1, 10 and Comparative Examples 10–13

[0118] Example Example 1 Example 10 Comparative Example 10 Comparative Example 11 Comparative Example 12 Comparative Example 13 Water contact angle 165° 163° 147° 156° 154° 159° Acid resistance ＞240h ＞240h ＞240h ＞240h ＞240h ＞240h Alkali resistance ＞240h ＞240h ＞240h ＞240h ＞240h ＞240h Aging resistance ＞5000h ＞5000h ＞5000h ＞5000h ＞5000h ＞5000h Anti-icing time 2643h 2714h 2261h 2467h 2421h 1529 Adhesion Level 2 Level 2 Level 2 Level 2 Level 2 Level 2

[0119] As shown in Table 5, with the increase of the content of nano-sized hydrophobic particles in the anti-icing coating, the water contact angle and anti-icing time of the anti-icing coating showed slight changes, indicating that the content of nano-sized hydrophobic particles can regulate the anti-icing performance of the coating. A comparison between Example 1 and Comparative Examples 10-12 shows that when nano-sized hydrophobic particles are omitted or a single type of nano-sized hydrophobic particles is used, the contact angle and anti-icing time of the anti-icing coating both decrease, indicating that the use of two different types of nano-sized hydrophobic particles in this invention can achieve a synergistic effect. A comparison between Example 1 and Comparative Example 13 shows that the addition of graphene oxide can further optimize the anti-icing performance of the coating.

[0120] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An anti-icing coating, comprising, by weight percentage, the following components: (4-Perfluorooctylphenyl)triethoxysilane 30%, tridecafluorooctyltriethoxysilane 20%, hexafluorobutyl methacrylate 5%, hexamethylene diisocyanate 12%, dimethylformamide 3%, nano-sized hydrophobic particles 15%, graphene oxide 1%, and the balance acetone. The nanoscale hydrophobic particles include nano-titanium dioxide and nano-silica; the nano-titanium dioxide has a particle size of 10~20nm, the nano-silica has a particle size of 1~100nm, and the nano-silica is spherical in shape; the mass ratio of the nano-titanium dioxide to the nano-silica is 1:

1. The method for preparing the anti-icing coating is as follows: (1) Mix (4-perfluorooctylphenyl)triethoxysilane, hexafluorobutyl methacrylate and an organic solvent to obtain a first mixture; (2) After heating the first mixture obtained in step (1) to 40°C, add tridecafluorooctyltriethoxysilane and hexamethylene diisocyanate to obtain the second mixture; (3) After heating the second mixture obtained in step (2) to 60°C, dimethylformamide, nano-sized hydrophobic particles and graphene oxide are added in sequence to obtain an anti-icing coating.

2. The application of the anti-icing coating of claim 1 in roads, bridges, high-voltage power lines and wind power generation equipment.

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