Anti-icing coating as well as preparation method and application thereof

Abstract

The invention provides an anti-icing coating as well as a preparation method and application thereof, and belongs to the technical field of anti-icing coatings. By optimizing the components of the anti-icing coating and utilizing the synergistic effect of (4-perfluorooctyl phenyl) triethoxysilane, hexafluorobutyl methacrylate and hexamethylene diisocyanate, the water contact angle of the anti-icing coating can be greatly increased, so that the hydrophobic property of the anti-icing coating is improved, and a very good anti-icing effect is achieved; by adding the nanoscale hydrophobic particles, a micron-nano concave-convex structure is formed on the surface of a coating formed by the anti-icing coating, a lotus leaf-like self-cleaning effect is achieved, water drops, water mist and dirt are effectively prevented from being attached to the surface of the anti-icing coating, and the icing phenomenon is further prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-icing coatings, and in particular to an anti-icing coating and a preparation method and application thereof. Background Art

[0002] In subtropical areas, winters are cold, and the temperature is often below 0℃, which makes it easy for roads, bridges, high-voltage wires, and wind power generation equipment to freeze, causing a variety of problems. For example, ice on the surface of roads and bridges causes serious traffic safety hazards, and ice on the surface of high-voltage wires and wind power generation equipment reduces the heat transfer efficiency of the equipment, increases pressure loss, and has a great impact on the system. At the same time, some areas often encounter "freezing rain" disasters, resulting in serious icing and ice-covering problems in the fields of electricity, energy, communications, and bridges, causing serious icing of high-voltage transmission, towers, and bridge cables, leading to problems such as breaking, collapse, and ice falling, causing serious economic losses and major safety hazards. In the face of the above problems, the main method currently used is to perform deicing and defrosting operations regularly or irregularly, which not only consumes a lot of energy and manpower, but also sprays anti-icing agents during the deicing and defrosting process, which can easily cause environmental pollution.

[0003] Anti-icing coating is an important means of preventing icing, but the anti-icing coating currently on the market only relies on the hydrophobicity of the coating to avoid icing as much as possible, and its anti-icing ability is relatively weak. At the same time, due to the weak bonding ability between the anti-icing coating and the substrate, the anti-icing coating is prone to falling off and breakage, and the anti-icing coating needs to be sprayed repeatedly, which increases the management cost.

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

[0005] The purpose of the present invention is to provide an anti-icing coating and a preparation method and application thereof. The anti-icing coating provided by the present invention has good anti-icing performance and a high level of adhesion to the substrate.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The invention provides an anti-icing coating, which comprises the following components by mass percentage: 30-33% of (4-perfluorooctylphenyl)triethoxysilane, 18-23% of tridecafluorooctyltriethoxysilane, 3-6% of hexafluorobutyl methacrylate, 9-22% of hexamethylene diisocyanate, 2-5% of dimethylformamide, 12-25% of nanometer-scale hydrophobic particles, 0.3-1.5% of graphene oxide and the remainder of an organic solvent.

[0008] Preferably, the anti-icing coating comprises the following components by mass percentage: 28-34% of (4-perfluorooctylphenyl)triethoxysilane, 16-25% of tridecafluorooctyltriethoxysilane, 4-5% of hexafluorobutyl methacrylate, 10-20% of hexamethylene diisocyanate, 3-4% of dimethylformamide, 15-22% of nanometer-scale hydrophobic particles, 0.5-1.2% of graphene oxide and the remainder of organic solvent.

[0009] Preferably, the nano-scale hydrophobic particles include nano-titanium dioxide and nano-silicon dioxide.

[0010] Preferably, the particle size of the nano titanium dioxide is 10-20 nm, the particle size of the nano silicon dioxide is 1-100 nm, and the shape of the nano silicon dioxide is spherical or quasi-spherical.

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

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

[0013] Preferably, the anti-icing coating further comprises 0.5-5% of an additive.

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

[0015] The present invention provides a method for preparing the anti-icing coating according to the above technical solution, comprising the following steps:

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

[0017] (2) heating the first mixed solution obtained in step (1) to 35-40° C. and then adding tridecafluorooctyl triethoxysilane and hexamethylene diisocyanate to obtain a second mixed solution;

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

[0019] The present invention provides the use 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 wires and wind power generation equipment.

[0020] The present invention provides an anti-icing coating, which comprises the following components by mass percentage: 30-33% of (4-perfluorooctylphenyl) triethoxysilane, 18-23% of tridecafluorooctyl triethoxysilane, 3-6% of hexafluorobutyl methacrylate, 9-22% of hexamethylene diisocyanate, 2-5% of dimethylformamide, 12-25% of nanometer-scale hydrophobic particles, 0.3-1.5% of graphene oxide and the remainder of organic solvent. The present invention optimizes the components of the anti-icing coating and utilizes the synergistic effect of (4-perfluorooctylphenyl) triethoxysilane, hexafluorobutyl methacrylate and hexamethylene diisocyanate to greatly improve the water contact angle of the anti-icing coating, thereby improving its hydrophobic performance and achieving a good anti-icing effect; by adding nanometer-scale hydrophobic particles, the coating surface formed by the anti-icing coating forms a micron-nano concave-convex structure, achieving a self-cleaning effect imitating a lotus leaf, effectively preventing water droplets, water mist and dirt from adhering to its surface, and further preventing the occurrence of 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 resistance 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 DESCRIPTION

[0021] The invention provides an anti-icing coating, which comprises the following components by mass percentage: 28-34% of (4-perfluorooctylphenyl)triethoxysilane, 16-25% of tridecafluorooctyltriethoxysilane, 3-6% of hexafluorobutyl methacrylate, 9-22% of hexamethylene diisocyanate, 2-5% of dimethylformamide, 12-25% of nanometer-scale hydrophobic particles, 0.3-1.5% of graphene oxide and the remainder of an organic solvent.

[0022] In terms of mass percentage, the anti-icing coating provided by the present invention comprises 28-34% (4-perfluorooctylphenyl) triethoxysilane, preferably 30-33%, and more preferably 31-32%. In the present invention, the (4-perfluorooctylphenyl) triethoxysilane is preferably from Shanghai Mairui Chemical Technology Co., Ltd., with a content of 97wt%, and a molecular formula of C 20 H 19 F 17 O3Si. The present invention can greatly improve the hydrophobicity of the anti-icing coating by adding (4-perfluorooctylphenyl) triethoxysilane, and can make water droplets formed on the coating surface due to cold weather or freezing rain quickly slide off, thereby avoiding ice on the coating surface.

[0023] In terms of mass percentage, the anti-icing coating provided by the present invention includes 16-25% of tridecafluorooctyl triethoxysilane, preferably 18-23%, and more preferably 20-22%. In the present invention, the tridecafluorooctyl triethoxysilane can reduce the melting point of the anti-icing coating, avoid the problem of cracking of the coating formed by the anti-icing coating at low temperatures, and improve the weather resistance and service life of the anti-icing coating.

[0024] The anti-icing coating provided by the present invention includes 3-6% hexafluorobutyl methacrylate, preferably 4-5% by mass percentage. The present invention can improve the self-cleaning performance and weather resistance of the anti-icing coating by adding hexafluorobutyl methacrylate. On the one hand, impurities such as dust and moisture falling on the surface of the coating can be removed, thereby preventing the dust attached at low temperatures from becoming a gathering point for moisture and causing ice. On the other hand, the coating will not fall off due to changes in factors such as temperature, light and pH value.

[0025] By mass percentage, the anti-icing coating provided by the present invention includes 9-22% hexamethylene diisocyanate, preferably 10-20%, more preferably 12-18%, and further preferably 14-16%. By adding hexamethylene diisocyanate, the present invention can improve the bonding performance of the anti-icing coating, thereby improving the bonding strength between the coating and the substrate, improving the resistance to external forces, avoiding the coating from falling off, and at the same time further improving the hydrophobicity and antifreeze performance of the coating.

[0026] The anti-icing coating provided by the present invention comprises 2-5%, preferably 3-4%, of dimethylformamide by mass percentage. In the present 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] In terms of mass percentage, the anti-icing coating provided by the present invention includes 12-25% of nano-scale hydrophobic particles, preferably 15-22%, and more preferably 18-20%. In the present invention, the nano-scale hydrophobic particles include nano-titanium dioxide and nano-silicon dioxide; the particle size of the nano-titanium dioxide is preferably 10-20nm; the particle size of the nano-silicon dioxide is preferably 1-100nm; the shape of the nano-silicon dioxide is preferably spherical or quasi-spherical; the mass ratio of the nano-titanium dioxide to the nano-silicon dioxide is preferably (0.3-1.7):1, more preferably (0.5-1.5):1, and further preferably (0.8-1.2):1. The present invention adds nano titanium dioxide and nano silicon dioxide, both of which have good hydrophobicity, and can further reduce the hydrophobicity of the coating, thereby reducing the water contact angle of the coating and preventing the coating surface from freezing at low temperatures; at the same time, nano titanium dioxide is a photocatalyst, which can generate strong oxidizing free radicals under sunlight, has a good bactericidal effect, and can improve the mildew-proof effect of the coating; through the compounding of nano titanium dioxide and nano silicon dioxide, the coating surface formed by the anti-icing coating can form a micron-nano concave-convex structure, achieve a self-cleaning effect imitating lotus leaves, effectively prevent water droplets, water mist and dirt from adhering to its surface, and further prevent the occurrence of icing; by controlling the shape and particle size of nano silicon dioxide, its surface energy can be reduced, and the hydrophobic groups on the surface of nano silicon dioxide and the concave-convex micro / nano structure can act synergistically, further improving the anti-icing effect of the coating.

[0028] In terms of mass percentage, 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%. In the present invention, the addition of a small amount of graphene oxide can further improve the hydrophobicity of the anti-icing coating.

[0029] The anti-icing coating provided by the present invention includes a residual amount of organic solvent by mass percentage. In the present invention, the organic solvent is preferably acetone or xylene. The present invention facilitates uniform mixing of the components by adding the organic solvent.

[0030] In terms of mass percentage, the anti-icing coating provided by the present invention preferably also includes 0.5-5% of an additive; the additive preferably includes one or more of a wear-resistant additive, an aging-resistant additive, a wetting agent, a defoaming agent and a surfactant; the wear-resistant additive is preferably glass microspheres or polytetrafluoroethylene powder; the aging-resistant additive is preferably an anti-thermal oxidative aging antioxidant or an anti-ultraviolet radiation antioxidant, more preferably antioxidant 4010 or antioxidant CPPD; the wetting agent is preferably an anionic surfactant or a non-ionic surfactant, more preferably sodium alkyl sulfonate, sodium alkyl aryl sulfonate, long-chain fatty alcohol polyoxyethylene ether or alkylphenol polyoxyethylene ether; the defoaming agent is preferably an organosilicon defoaming agent, a polyether defoaming agent or a polyether-modified polysiloxane defoaming agent. By adding additives, the present invention can further modify the performance of the anti-icing coating according to the needs of the environment and performance, thereby obtaining the desired anti-icing coating. As an embodiment of the present invention, the dosage of the auxiliary agent can be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% or 5%.

[0031] The present invention optimizes the ingredients of the anti-icing coating and utilizes the synergistic effect of (4-perfluorooctylphenyl) triethoxysilane, hexafluorobutyl methacrylate and hexamethylene diisocyanate to greatly increase the water contact angle of the anti-icing coating, thereby improving its hydrophobic performance and achieving a good anti-icing effect; by adding nano-scale hydrophobic particles, the coating surface formed by the anti-icing coating forms a micron-nano concave-convex structure, achieving a lotus leaf-like self-cleaning effect, effectively preventing water droplets, water mist and dirt from adhering to its surface, and further preventing the occurrence of icing.

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

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

[0034] (2) heating the first mixed solution obtained in step (1) to 35-40° C. and then adding tridecafluorooctyl triethoxysilane and hexamethylene diisocyanate to obtain a second mixed solution;

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

[0036] In the present invention, the preparation of the anti-icing coating is preferably carried out under stirring conditions. The present invention has no particular limitation on the stirring rate and time, which can be determined according to the technical common sense of those skilled in the art, as long as the components can be mixed evenly and splashing of the solution can be avoided.

[0037] The present invention has no particular limitation on the specific operation of the heating, as long as the temperature can reach the required level. As an embodiment of the present invention, the heating method can be water bath heating. The present invention can adjust the viscosity of the mixed solution by heating during the preparation process, thereby facilitating more uniform mixing of the components.

[0038] In the present invention, when the anti-icing coating further includes an auxiliary agent, the auxiliary agent is preferably added after adding graphene oxide.

[0039] The present invention also provides the use 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 wires and wind power generation equipment.

[0040] The present invention has no particular limitation on the specific manner of application, and any coating application manner well known to those skilled in the art may be used.

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

[0042] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1

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

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

[0046] The preparation method of the anti-icing coating is:

[0047] (1) mixing (4-perfluorooctylphenyl)triethoxysilane, hexafluorobutyl methacrylate and an organic solvent and stirring the mixture to obtain a first mixed solution;

[0048] (2) heating the first mixed solution obtained in step (1) to 40° C. in a water bath, adding tridecafluorooctyl triethoxysilane and hexamethylene diisocyanate, and stirring to obtain a second mixed solution;

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

[0050] Example 2

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

[0052] Example 3

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

[0054] Comparative Example 1

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

[0056] Comparative Example 2

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

[0058] Comparative Example 3

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

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

[0061] Table 1 Performance of the anti-icing coatings prepared in Examples 1 to 3 and Comparative Examples 1 to 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] Among them, the water contact angle is measured using a contact angle tester;

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

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

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

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

[0068] It can be seen from Table 1 that 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; and 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 shows a significant decline, and the decrease is significantly greater than the decrease when the content decreases from 20% to 10%, indicating that there is a synergistic effect between (4-perfluorooctylphenyl)triethoxysilane and other components.

[0069] Example 4

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

[0071] Example 5

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

[0073] Comparative Example 4

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

[0075] Comparative Example 5

[0076] The mass percentage of tridecafluorooctyltriethoxysilane is 5%, and other conditions are the same as those 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 standard in Table 1, and the results obtained 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] It can be seen from Table 2 that 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 it has little effect on other properties. The anti-icing time changes slightly, indicating that it can further optimize the anti-icing effect of the coating.

[0081] Example 6

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

[0083] Example 7

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

[0085] Comparative Example 6

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

[0087] Comparative Example 7

[0088] The mass percentage of hexafluorobutyl methacrylate is 20%, and other conditions are the same as those 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 standard in Table 1, and the results obtained 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] It can be seen from Table 3 that with the increase of the content of hexafluorobutyl methacrylate in the anti-icing coating, the water contact angle of the anti-icing coating changes, but the change range is small, and it has little effect on other properties, while the anti-icing time changes, indicating that it can further optimize the anti-icing effect of the coating; by comparing Example 1 with Comparative Examples 6 to 7, it can be seen that although the anti-icing effect of the coating will decrease when hexafluorobutyl methacrylate is not added, if the amount of hexafluorobutyl methacrylate added is too much, the anti-icing performance will also decrease. It is speculated that this is because when the amount of hexafluorobutyl methacrylate is too much, the stability of the system will deteriorate, thereby resulting in anti-icing performance.

[0094] Example 8

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

[0096] Example 9

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

[0098] Comparative Example 8

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

[0100] Comparative Example 9

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

[0102] The performance of the anti-icing coatings prepared in Examples 1, 8 to 9 and Comparative Examples 8 to 9 was tested according to the test standard in Table 1, and the results obtained 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] It can be seen from Table 4 that with the increase of the content of hexamethylene diisocyanate in the anti-icing coating, the water contact angle of the anti-icing coating changes, but the change is small, and it has little effect on other properties, while the anti-icing time changes, indicating that it can further optimize the anti-icing effect of the coating; by comparing Example 1 with Comparative Examples 8 to 9, it can be seen that although hexamethylene diisocyanate is not added or the amount added is small, the anti-icing effect of the coating is significantly reduced, especially when it is not added. The decline is obvious, which indirectly proves that hexamethylene diisocyanate causes the synergistic effect to disappear, thereby significantly reducing the anti-icing effect of the coating.

[0106] Example 10

[0107] The mass percentage of the nanometer-scale hydrophobic particles is 25%, and other conditions are the same as those in Example 1.

[0108] Comparative Example 10

[0109] The mass percentage of the nano-scale hydrophobic particles is 0, and other conditions are the same as those in Example 1.

[0110] Comparative Example 11

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

[0112] Comparative Example 12

[0113] The nanometer-scale hydrophobic particles are composed of nanometer silicon dioxide, and other conditions are the same as those in Example 1.

[0114] Comparative Example 13

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

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

[0117] Table 5 Performance of the anti-icing coatings prepared in Examples 1, 10 and Comparative Examples 10 to 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] It can be seen from Table 5 that with the increase of the content of nano-scale hydrophobic particles in the anti-icing coating, the water contact angle and anti-icing time of the anti-icing coating change slightly, indicating that the content of nano-scale hydrophobic particles can regulate the anti-icing performance of the coating; by comparing Example 1 with Comparative Examples 10 to 12, it can be seen that when the nano-scale hydrophobic particles are omitted or a single type of nano-scale hydrophobic particles is used, the contact angle and anti-icing time of the anti-icing coating both decline, indicating that the present invention uses two different types of nano-scale hydrophobic particles to achieve a synergistic effect; by comparing Example 1 with Comparative Example 13, it can be seen that the addition of graphene oxide can further optimize the anti-icing performance of the coating.

[0120] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An anti-icing coating, comprising the following components by mass percentage: 30-33% of (4-perfluorooctylphenyl)triethoxysilane, 18-23% of tridecafluorooctyltriethoxysilane, 3-6% of hexafluorobutyl methacrylate, 9-22% of hexamethylene diisocyanate, 2-5% of dimethylformamide, 12-25% of nanometer-scale hydrophobic particles, 0.3-1.5% of graphene oxide and the remainder of an organic solvent.

2. The anti-icing coating according to claim 1, characterized in that: The anti-icing coating comprises the following components by mass percentage: 28-34% of (4-perfluorooctylphenyl)triethoxysilane, 16-25% of tridecafluorooctyltriethoxysilane, 4-5% of hexafluorobutyl methacrylate, 10-20% of hexamethylene diisocyanate, 3-4% of dimethylformamide, 15-22% of nanometer-scale hydrophobic particles, 0.5-1.2% of graphene oxide and the remainder of organic solvent.

3. The anti-icing coating according to claim 1 or 2, characterized in that: The nanometer-scale hydrophobic particles include nanometer titanium dioxide and nanometer silicon dioxide.

4. The anti-icing coating according to claim 3, characterized in that: The particle size of the nano titanium dioxide is 10-20 nm, the particle size of the nano silicon dioxide is 1-100 nm, and the shape of the nano silicon dioxide is spherical or quasi-spherical.

5. The anti-icing coating according to claim 4, characterized in that: The mass ratio of the nano titanium dioxide to the nano silicon dioxide is (0.3-1.7):

1.

6. The anti-icing coating according to claim 1, characterized in that: The organic solvent is acetone or xylene.

7. The anti-icing coating according to claim 1, characterized in that: The anti-icing coating also includes 0.5-5% of an auxiliary agent.

8. The anti-icing coating according to claim 7, characterized in that: The additives include one or more of wear-resistant additives, anti-aging additives, wetting agents, defoaming agents and surfactants.

9. The method for preparing the anti-icing coating according to any one of claims 1 to 8, comprising the following steps: (1) mixing (4-perfluorooctylphenyl)triethoxysilane, hexafluorobutyl methacrylate and an organic solvent to obtain a first mixed solution; (2) heating the first mixed solution obtained in step (1) to 35-40° C. and then adding tridecafluorooctyl triethoxysilane and hexamethylene diisocyanate to obtain a second mixed solution; (3) After heating the second mixed solution obtained in step (2) to 50-60° C., dimethylformamide, nano-scale hydrophobic particles and graphene oxide are added in sequence to obtain an anti-icing coating.

10. Use of the anti-icing coating according to any one of claims 1 to 8 or the anti-icing coating prepared by the preparation method according to claim 9 in roads, bridges, high-voltage wires and wind power generation equipment.

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