Preparation method of oil storage type long-acting super-smooth anti-icing coating

Abstract

The invention discloses a preparation method of an oil storage type long-acting super-smooth anti-icing coating. The preparation method comprises the following steps: (1) preparing an aminated biomass carbon oil storage unit; (2) preparing biomass carbon oil storage cells; (3) preparation of dihydroxyl modified glycidyl methacrylate; (4) preparing a coating organic silicon polyurethane main body; and (5) preparing the anti-icing coating. The surface of the prepared anti-icing coating has excellent liquid drop sliding performance, lubricating liquid loss is reduced, and compared with a traditional lubricating liquid injection porous surface (SLIPS), the anti-icing coating has more excellent durability in various extreme environments and has low ice shear strength and deicing durability. Besides, the coating can secrete lubricating liquid in response to environmental stimulation (illumination and temperature induction), a lubricating layer damaged in icing / deicing circulation and external abrasion is rapidly repaired through self-supplement of the lubricating liquid, and the actual application performance of the coating in the severe environment is effectively enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-icing, and in particular relates to a method for preparing an oil-storage type long-lasting super-slip anti-icing coating. Background Art

[0002] Ice / frost is one of the most common phenomena in nature, but the ice / frost phenomenon on solid surfaces can bring many inconveniences to industrial production and personal life. Icing on the surfaces of major infrastructure such as transportation, energy and production can cause serious economic losses and safety hazards. Traditional active anti-icing strategies, such as mechanical deicing, heating and electric deicing, and chemical methods, although they can achieve instant deicing, are time-consuming and energy-consuming, and may even cause harm to the environment. Therefore, there is an urgent need to develop efficient, energy-saving and environmentally friendly anti-icing / deicing strategies. Among them, anti-icing coatings, as a new type of surface functional material, can inhibit ice nucleation, reduce ice adhesion and slow down ice propagation by changing surface properties. It can reduce the risk of icing without relying on external energy input, is more sustainable, and is in line with the concept of green development.

[0003] There is an inherent contradiction between the static protection mechanism of traditional anti-icing coatings and external dynamic damage. During use, the surface functional layer cannot be dynamically repaired to cope with external wear and continuous loss. Surface durability has become a key issue restricting the long-term application of anti-icing coatings. The development of durable anti-icing coatings that can dynamically repair the surface functional layer is of great significance to the construction of a long-term protection system. Lubricating liquid infused porous surface (SLIPS) has unique advantages due to its dynamic lubricating layer: the self-migration characteristics of the dynamic lubricating layer on the SLIPS surface give it excellent self-healing properties and ultra-low ice adhesion, but it still faces the challenge of continuous loss of lubricant. Therefore, a more reasonable design is urgently needed to "keep" the lubricant on the surface, so that the coating has optimal sliding performance while reducing lubricant loss, has excellent stable durability, and can dynamically respond to the environment to repair the damaged lubricating layer on the surface to achieve long-term application. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for preparing an oil-storage type long-lasting super-slip anti-icing coating. In response to the defects in the existing technology, an oil-storage long-lasting super-slip anti-icing coating is prepared, which has extremely low ice adhesion and "retains" the lubricating fluid on the surface, so that the coating has optimal sliding performance while reducing lubricating fluid loss, has excellent stability and durability, and can dynamically respond to the environment to repair damaged lubricating layers on the surface to achieve long-term application.

[0005] In order to solve the above technical problems, the following technical solutions are adopted:

[0006] The preparation method of the oil storage type long-lasting super-slip anti-icing coating is characterized by comprising the following steps:

[0007] (1) Preparation of oil storage cells:

[0008] Dispersing 1-100 parts by weight of surface amino-modified biomass carbon oil storage units and 1-500 parts by weight of dimethyl silicone oil in 100-1000 parts by weight of solvent α, stirring at 25° C. for 12 hours, and removing the solvent by rotary evaporation to obtain biomass carbon oil storage cells;

[0009] (2) Preparation of dihydroxy-modified glycidyl methacrylate:

[0010] Dissolving 1-100 parts by weight of glycidyl methacrylate, 1-100 parts by weight of thioglycerol, and 1-10 parts by weight of dimethylphenylphosphine in solvent β, and reacting at 30-60° C. for 2-6 hours to obtain dihydroxy-modified glycidyl methacrylate;

[0011] (3) Preparation of coating silicone polyurethane body:

[0012] 10-100 parts by weight of a dual-terminal reactive polydimethylsiloxane and 1-10 parts by weight of a polyisocyanate are dissolved in 10-100 parts by weight of solvent α, mixed, and heated under a nitrogen atmosphere at 60-80°C for 1-4 hours to obtain an isocyanate-terminated prepolymer. 1-10 parts by weight of a bishydroxy / amino disulfide compound and 1-10 parts by weight of bishydroxy-modified glycidyl methacrylate are then added, mixed, and heated under a nitrogen atmosphere at 60-80°C for 1-4 hours to prepare a silicone polyurethane liquid as the main polymer of the coating;

[0013] (4) Preparation of anti-icing coating:

[0014] 1-50 parts by weight of the biomass carbon oil storage cells prepared in the above (2) are added to the organosilicon polyurethane liquid prepared in the above (4), and the cells are evenly dispersed to obtain a biomass carbon oil storage long-lasting super-slip anti-icing coating.

[0015] After optimization, the preparation of the surface amination biomass carbon oil storage unit includes:

[0016] Solution A: Disperse 1-100 parts by weight of biomass carbon in 1-100 parts by weight of solvent water and 100-1000 parts by weight of solvent ethanol;

[0017] Solution B: Dissolve 1-100 parts by weight of a silane coupling agent and 1-100 parts by weight of aqueous ammonia in 100-1000 parts by weight of ethanol;

[0018] Solution B was added to solution A, washed with ethanol and water, and centrifuged to obtain a solid, which was freeze-dried to obtain a surface amination biomass carbon oil storage unit.

[0019] After optimization, the biomass carbon in the step is selected from a mixture of one or more of carbon nanotubes, activated carbon, carbon microspheres, carbon aerogels, porous carbon, and lignin-derived carbon.

[0020] After optimization, the silane coupling agent is selected from a mixture of one or more of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane.

[0021] After optimization, in the step (1), the dimethyl silicone oil used is selected from a mixture of one or more of dimethyl silicone oil with a viscosity of 100 mPa·s, dimethyl silicone oil with a viscosity of 50 mPa·s, dimethyl silicone oil with a viscosity of 20 mPa·s, and dimethyl silicone oil with a viscosity of 10 mPa·s.

[0022] After optimization, the solvent α is selected from a mixture of one or more of ethanol, tetrahydrofuran, acetone, methanol, dichloromethane, and hexane;

[0023] Preferably, the solvent β is a mixture of one or more of ethanol, tetrahydrofuran, acetone, methanol, dichloromethane and hexane.

[0024] Preferably, the weight average molecular weight of the dual-end reactive polydimethylsiloxane is 1000-10000; the dual-end groups in the molecular formula are one or more of hydroxypropyl, aminopropyl and epoxy groups.

[0025] Preferably, the polyisocyanate is a diisocyanate and a triisocyanate, and a mixture of one or more of diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, and triphenylmethane triisocyanate is selected.

[0026] Preferably, the bishydroxy / amino disulfide compound is a mixture of one or more of 3,3'-dihydroxydiphenyl disulfide, 2,2'-diaminodiphenyl disulfide, 4,4'-diaminodiphenyl disulfide, bis(4-hydroxyphenyl) disulfide, and bis(2-hydroxyethyl) disulfide.

[0027] The coating and use method of the biomass carbon oil storage long-term super-slip anti-icing coating is characterized by comprising the following steps: cleaning the surface to be sprayed, applying the anti-icing coating on the surface to be sprayed by air spraying, with the coating thickness of the wet film being 100-1000 μm, and fully drying under ventilated and dry room temperature conditions to obtain the biomass carbon oil storage long-term super-slip anti-icing coating.

[0028] Lubricant loss in lubricating liquid-infused porous surfaces (SLIPS) is partly due to the strong interaction between the sliding droplet and the lubricant. Modeling and analysis of the sliding behavior of droplets on the dynamic lubricating layer of SLIPS reveals that as the droplet slides, it entrains lubricant around it and causes the growth of wetting ridges (lubricant rings around the droplet), which is the main cause of lubricant consumption. The volume of the wetting ridge is equal to the volume of the lost lubricant. Therefore, a more rational design is needed to "hold" low-viscosity silicone oil on the surface, achieving optimal superlubricity while also providing superior stability and durability, and the ability to respond to environmental stimuli for intelligent and adaptive regulation.

[0029] The present invention is based on the design of a biomass carbon oil storage unit. After storing a large amount of silicone oil, a long-lasting super-slip anti-icing coating is prepared through covalent cross-linking of the amino group of the oil storage unit and the epoxy group of the silicone polyurethane matrix. Among them, the rough structure of the biomass carbon oil storage unit can effectively adsorb and store silicone oil, "binding and retaining" the silicone oil on the surface of the coating, so that the coating surface is in a solid-like state and has no dynamic oil film. It has excellent sliding performance while avoiding lubricant loss, is durable in various extreme environments, and has low ice shear strength and deicing durability. In addition, the coating can secrete lubricating fluid in response to environmental stimuli (temperature induction), and quickly repair its lubricating layer damaged in the icing / deicing cycle and external wear through self-replenishment of the lubricating fluid, effectively enhancing its practical application performance in harsh environments.

[0030] Traditional anti-icing surfaces lack durability. The biomass carbon oil storage long-lasting ultra-slip anti-icing coating prepared in this invention is durable in various harsh environments, including centrifugal force, dynamic water impact, ice abrasion, and cyclic wiping. Compared with traditional SLIPS, it has many advantages and the feasibility of long-term protection.

[0031] The above technical solution has the following beneficial effects:

[0032] (1) The anti-icing coating produced by the present invention exhibits both excellent super-slip properties and excellent stability and durability: the surface silicone oil is "bound" by the biomass carbon oil storage unit, presenting a solid-like state without a dynamic oil film and an extremely low water sliding angle. No wetting ridges form around moving droplets, effectively preventing lubricant loss. Even after repeated wiping cycles, the surface maintains excellent sliding properties and exhibits stable lubricant circulation and self-replenishment. This overcomes the shortcomings of conventional SLIPS anti-icing coatings, such as insufficient surface durability.

[0033] (2) The anti-icing coating prepared by the present invention exhibits stable self-heating effect and lubrication performance under extreme environments such as heating, ice abrasion, centrifugal force and water impact. The contact between the droplet and the surface is a liquid-liquid interface, and the surface has low ice shear strength, which can be de-iced by wind. It is expected to be applied to the surface of wind turbine blades, and the ice on the coating surface can be efficiently removed by wind and centrifugal force. Compared with conventional SLIPS, it has longer ice formation / de-icing cycle durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below in conjunction with the accompanying drawings:

[0035] Figure 1 The surface conditions of the coatings prepared in the comparative examples and embodiments of the present invention after being wiped 0 times, 100 times, and 500 times.

[0036] Figure 2 This is a surface scanning electron microscope photograph of the coating in Example 5 of the present invention;

[0037] Figure 3 These are photos of deicing on the surface of the aluminum cable after coating treatment in Example 5 of the present invention under one sunlight intensity at different time periods. DETAILED DESCRIPTION

[0038] The present invention aims to provide a method for preparing a long-lasting super-slip anti-icing coating with biomass carbon oil storage, which is based on the construction of a biomass carbon oil storage unit and can store a large amount of silicone oil. Furthermore, a long-lasting super-slip anti-icing coating is prepared by covalently cross-linking the amino group of the oil storage unit with the epoxy group of the silicone polyurethane matrix. The rough structure of the biomass carbon oil storage unit effectively adsorbs and stores silicone oil, "maintaining" the silicone oil on the surface of the coating, making its surface solid-like and free of dynamic oil film. While having excellent sliding performance, it avoids lubricant loss, is durable in various extreme environments, and has low ice shear strength and de-icing durability. In addition, the anti-icing coating can secrete lubricating fluid in response to environmental stimuli, and quickly repair its lubricating layer damaged in the icing / de-icing cycle and external wear through self-replenishment of the lubricating fluid, effectively enhancing its practical application performance in harsh environments.

[0039] The technical solution of the present invention is further described below in conjunction with specific embodiments and comparative examples. The embodiments may enable those skilled in the art to more fully understand the present invention, but are not intended to limit the present invention in any way.

[0040] Example 1

[0041] (1) Preparation of ammoniated biomass carbon oil storage unit:

[0042] Solution A: 1 part by weight of porous carbon was dispersed in 1 part by weight of solvent water and 100 parts by weight of solvent ethanol.

[0043] Solution B: Dissolve 1 part by weight of 3-aminopropyltriethoxysilane and 1 part by weight of aqueous ammonia in 100 parts by weight of ethanol.

[0044] Solution B was added to solution A, washed with ethanol and water, and centrifuged to obtain a solid, which was freeze-dried to obtain an amination biomass carbon oil storage unit.

[0045] (2) Preparation of biomass carbon oil storage cells:

[0046] 1 part by weight of the surface amino-modified biomass carbon oil storage unit and 1 part by weight of dimethyl silicone oil with a viscosity of 10 mPa·s were dispersed in 100 parts by weight of tetrahydrofuran, stirred at 25° C. for 12 h, and the solvent was removed by rotary evaporation to obtain biomass carbon oil storage cells.

[0047] (3) Preparation of dihydroxy-modified glycidyl methacrylate:

[0048] 1 part by weight of glycidyl methacrylate, 1 part by weight of thioglycerol, and 1 part by weight of dimethylphenylphosphine were dissolved in methanol and reacted at 30° C. for 6 hours to obtain dihydroxy-modified glycidyl methacrylate.

[0049] (4) Preparation of coating silicone polyurethane body:

[0050] Take 10 parts by weight of dihydroxypropyl-terminated reactive polydimethylsiloxane (molecular weight 1000) and 1 part by weight of diphenylmethane diisocyanate and dissolve them in 10 parts by weight of tetrahydrofuran. After mixing, heat them under a nitrogen atmosphere at 60°C for 4 hours to obtain an isocyanate-terminated prepolymer. Continue to add 1 part by weight of 3,3'-dihydroxydiphenyl disulfide and 1 part by weight of dihydroxy-modified glycidyl methacrylate. After mixing, heat them under a nitrogen atmosphere at 60°C for 4 hours to prepare a silicone polyurethane liquid as the coating polymer body.

[0051] (5) Preparation of anti-icing coating:

[0052] 10 parts by weight of the biomass carbon oil storage cells prepared in (2) above were added to the organosilicon polyurethane solution prepared in (4), and the cells were evenly dispersed to obtain a biomass carbon oil storage long-lasting super-slip anti-icing coating.

[0053] (6) The coating and use method of the biomass carbon oil storage long-lasting super-slip anti-icing coating is as follows: clean the surface to be sprayed, and evenly apply the anti-icing coating on the surface to be sprayed by air spraying. The coating thickness of the wet film is 100 μm. It is fully dried under ventilated and dry room temperature conditions to obtain the biomass carbon oil storage long-lasting super-slip anti-icing coating.

[0054] Example 2

[0055] (1) Preparation of ammoniated biomass carbon oil storage unit:

[0056] Solution A: 10 parts by weight of carbon nanotubes were dispersed in 10 parts by weight of solvent water and 300 parts by weight of solvent ethanol.

[0057] Solution B: 10 parts by weight of 3-aminopropyltrimethoxysilane, 10 parts by weight of ammonia water were dissolved in 300 parts by weight of solvent ethanol.

[0058] Solution B was added to solution A, and washed with ethanol and water and centrifuged to obtain a solid. Freeze-drying obtained amino-biomass carbon oil storage units.

[0059] (2) Preparation of biomass carbon oil storage cells:

[0060] 10 parts by weight of surface amino-biomass carbon oil storage units, 20 parts by weight of dimethyl silicone oil with a viscosity of 20 mPa·s, were dispersed in 300 parts by weight of dichloromethane, stirred at 25°C for 12h, and after removing the solvent by rotary evaporation, biomass carbon oil storage cells were obtained.

[0061] (3) Preparation of dihydroxyl-modified glycidyl methacrylate:

[0062] 10 parts by weight of glycidyl methacrylate, 10 parts by weight of thio-glycerol, 3 parts by weight of dimethylphenylphosphine were dissolved in acetone, and reacted at 40°C for 5h to obtain dihydroxyl-modified glycidyl methacrylate.

[0063] (4) Preparation of coating silicone polyurethane main body:

[0064] 20 parts by weight of dihydroxypropyl-terminated reactive polydimethylsiloxane (molecular weight 2000), 2 parts by weight of isophorone diisocyanate were dissolved in 20 parts by weight of dichloromethane, and after mixing, heated at 70°C for 4h under a nitrogen atmosphere to obtain an isocyanate group-terminated prepolymer. Continue to add 2 parts by weight of 2,2'-diamino diphenyl disulfide, 2 parts by weight of dihydroxyl-modified glycidyl methacrylate, and after mixing, heat at 70°C for 4h under a nitrogen atmosphere to prepare a silicone polyurethane solution as a coating polymer main body.

[0065] (5) Preparation of ice-repellent coating:

[0066] 20 parts by weight of the biomass carbon oil storage cells prepared in (2) above were added to the silicone polyurethane solution prepared in (4) to obtain a biomass carbon oil storage long-acting super-smooth ice-repellent coating after uniform dispersion.

[0067] (6) Application method of biomass carbon oil storage long-acting super-smooth ice-repellent coating: Clean the surface to be sprayed, and uniformly coat the ice-repellent coating on the surface to be sprayed in the form of air spraying, with a wet film coating thickness of 300μm. Dry thoroughly at room temperature under a ventilated and dry condition to obtain a biomass carbon oil storage long-acting super-smooth ice-repellent coating.

[0068] Example 3

[0069] (1) Preparation of ammoniated biomass carbon oil storage unit:

[0070] Solution A: 60 parts by weight of carbon microspheres are dispersed in 50 parts by weight of solvent water and 600 parts by weight of solvent ethanol.

[0071] Solution B: 60 parts by weight of 3-aminopropyltrimethoxysilane and 40 parts by weight of aqueous ammonia are dissolved in 600 parts by weight of ethanol.

[0072] Solution B was added to solution A, washed with ethanol and water, and centrifuged to obtain a solid, which was freeze-dried to obtain an amination biomass carbon oil storage unit.

[0073] (2) Preparation of biomass carbon oil storage cells:

[0074] 60 parts by weight of surface amino-modified biomass carbon oil storage units and 80 parts by weight of dimethyl silicone oil with a viscosity of 100 mPa·s were dispersed in 600 parts by weight of acetone, stirred at 25° C. for 12 h, and the solvent was removed by rotary evaporation to obtain biomass carbon oil storage cells.

[0075] (3) Preparation of dihydroxy-modified glycidyl methacrylate:

[0076] 40 parts by weight of glycidyl methacrylate, 40 parts by weight of thioglycerol, and 4 parts by weight of dimethylphenylphosphine were dissolved in dichloromethane and reacted at 60° C. for 3 hours to obtain dihydroxy-modified glycidyl methacrylate.

[0077] (4) Preparation of coating silicone polyurethane body:

[0078] Take 25 parts by weight of diepoxy-terminated reactive polydimethylsiloxane (molecular weight 2500) and 2.5 parts by weight of triphenylmethane triisocyanate and dissolve them in 25 parts by weight of acetone. After mixing, heat them under a nitrogen atmosphere at 75°C for 4 hours to obtain an isocyanate-terminated prepolymer. Continue to add 2.5 parts by weight of 4-bis(4-hydroxyphenyl) disulfide and 2.5 parts by weight of dihydroxy-modified methacrylate glycidyl ester. After mixing, heat them under a nitrogen atmosphere at 75°C for 4 hours to prepare a silicone polyurethane liquid as the coating polymer body.

[0079] (5) Preparation of anti-icing coating:

[0080] 25 parts by weight of the biomass carbon oil storage cells prepared in (2) above were added to the organosilicon polyurethane liquid prepared in (4), and the cells were evenly dispersed to obtain a biomass carbon oil storage long-lasting super-slip anti-icing coating.

[0081] (6) The coating and using method of the biomass carbon oil storage long-acting super-smooth anti-icing coating: clean the surface to be sprayed, uniformly coat the anti-icing coating on the surface to be sprayed in the form of air spraying, the coating thickness of the wet film is 400 μm, and the coating is dried at room temperature under the condition of ventilation and drying, so that the biomass carbon oil storage long-acting super-smooth anti-icing coating is obtained.

[0082] Example 4

[0083] (1) Preparation of amino-biomass carbon oil storage unit:

[0084] Solution A: 40 parts by weight of carbon aerogel is dispersed in 30 parts by weight of solvent water and 500 parts by weight of solvent ethanol.

[0085] Solution B: 20 parts by weight of N-(2-aminoethyl)-3-aminopropyl trimethoxysilane, 30 parts by weight of ammonia water are dissolved in 500 parts by weight of solvent ethanol.

[0086] Solution B is added to solution A, and washed with ethanol and water and centrifuged to obtain a solid. Freeze-drying obtains the amino-biomass carbon oil storage unit.

[0087] (2) Preparation of biomass carbon oil storage cell:

[0088] 40 parts by weight of surface amino-biomass carbon oil storage unit, 60 parts by weight of dimethyl silicone oil with a viscosity of 50 mPa·s, are dispersed in 500 parts by weight of hexane, stirred at 25°C for 12h, and the solvent is removed by rotary evaporation to obtain the biomass carbon oil storage cell.

[0089] (3) Preparation of dihydroxy-modified glycidyl methacrylate:

[0090] 40 parts by weight of glycidyl methacrylate, 40 parts by weight of thio-glycerol, 4 parts by weight of dimethylphenyl phosphine are dissolved in tetrahydrofuran, and reacted at 50°C for 4h to obtain dihydroxy-modified glycidyl methacrylate.

[0091] (4) Preparation of coating silicone polyurethane main body:

[0092] 30 parts by weight of diaminopropyl-terminated reactive polydimethylsiloxane (molecular weight 3000), 3 parts by weight of hexamethylene diisocyanate are dissolved in 30 parts by weight of dichloromethane, mixed uniformly, heated at 80°C for 3h under nitrogen atmosphere to obtain an isocyanate group-terminated prepolymer, and then 3 parts by weight of 4,4'-diamino diphenyl disulfide, 3 parts by weight of dihydroxy-modified glycidyl methacrylate are added, mixed uniformly, and heated at 80°C for 3h under nitrogen atmosphere to prepare the silicone polyurethane solution as the coating polymer main body.

[0093] (5) Preparation of anti-icing coating:

[0094] In the prepared silicone polyurethane solution of (4), 30 parts by weight of the biomass carbon oil storage cell prepared in (2) above is added, and after uniform dispersion, a biomass carbon oil storage long-acting super-smooth anti-icing coating is obtained.

[0095] (6) The coating and use method of the biomass carbon oil storage long-acting super-smooth anti-icing coating: clean the surface to be sprayed, and uniformly coat the anti-icing coating on the surface to be sprayed in the form of air spraying, the coating thickness of the wet film is 500 μm, and the coating is dried at room temperature under ventilation and drying conditions to obtain a biomass carbon oil storage long-acting super-smooth anti-icing coating.

[0096] Example 5

[0097] (1) Preparation of amino-biomass carbon oil storage unit:

[0098] Solution A: 50 parts by weight of lignin-derived carbon is dispersed in 40 parts by weight of solvent water and 600 parts by weight of solvent ethanol.

[0099] Solution B: 50 parts by weight of 3-aminopropyltriethoxysilane, 40 parts by weight of ammonia water are dissolved in 600 parts by weight of solvent ethanol.

[0100] Solution B is added to solution A, and washed with ethanol and water and centrifuged to obtain a solid. Freeze-drying obtains an amino-biomass carbon oil storage unit.

[0101] (2) Preparation of biomass carbon oil storage cell:

[0102] 50 parts by weight of surface amino-biomass carbon oil storage unit, 80 parts by weight of dimethyl silicone oil with a viscosity of 10 mPa·s, are dispersed in 500 parts by weight of tetrahydrofuran, stirred at 25°C for 12h, and after removing the solvent by rotary evaporation, a biomass carbon oil storage cell is obtained.

[0103] (3) Preparation of dihydroxy-modified glycidyl methacrylate:

[0104] 50 parts by weight of glycidyl methacrylate, 50 parts by weight of thio-glycerol, 5 parts by weight of dimethylphenyl phosphine are dissolved in acetone, and reacted at 60°C for 3h to obtain dihydroxy-modified glycidyl methacrylate.

[0105] (4) Preparation of coating silicone polyurethane main body:

[0106] Take 40 parts by weight of bis-aminopropyl-terminated reactive polydimethylsiloxane (molecular weight 4000) and 4 parts by weight of isophorone diisocyanate and dissolve them in 40 parts by weight of tetrahydrofuran. After mixing, heat them under nitrogen atmosphere and 80°C for 3 hours to obtain an isocyanate-terminated prepolymer. Continue to add 4 parts by weight of 2,2'-diaminodiphenyl disulfide and 4 parts by weight of dihydroxy-modified glycidyl methacrylate. After mixing, heat them under nitrogen atmosphere and 80°C for 3 hours to prepare a silicone polyurethane liquid as the coating polymer main body.

[0107] (5) Preparation of anti-icing coating:

[0108] 40 parts by weight of the biomass carbon oil storage cells prepared in (2) above were added to the organosilicon polyurethane solution prepared in (4), and the cells were evenly dispersed to obtain a biomass carbon oil storage long-lasting super-slip anti-icing coating.

[0109] (6) The coating and use method of the biomass carbon oil storage long-lasting super-slip anti-icing coating is as follows: clean the surface to be sprayed, and evenly apply the anti-icing coating on the surface to be sprayed by air spraying. The coating thickness of the wet film is 600 μm. It is fully dried under ventilated and dry room temperature conditions to obtain the biomass carbon oil storage long-lasting super-slip anti-icing coating.

[0110] Performance evaluation results:

[0111] (1) Deicing performance

[0112] The ice shear strength of an ice-phobic surface should be less than 100 kPa. The coating's deicing performance was tested using an ice shear strength test: a bottomless cuvette was placed on the coating surface and filled with 1.5 g of water. The cuvette was then cooled at -15°C for 4 hours to ensure complete freezing of the water column. A force gauge mounted on a motion table then pushed the cuvette from the bottom at a speed of 0.1 mm / s (the distance between the force probe and the sample surface must be as close as possible to avoid additional torque). The maximum force during this process was recorded, representing the coating's ice shear strength, and the coating was then subjected to icing / deicing cycle testing.

[0113] The deicing performance test results are shown in Table 1. The durable anti-icing coating of the present invention has extremely low ice shear strength and good cycle durability (the number of times the ice shear strength remains basically unchanged), which is better than most current anti-icing surfaces.

[0114] (2) Cyclic wiping and lubricant self-replenishing performance test

[0115] First, the initial sliding rate of the droplet on the surface was tested, then the surface was completely wiped with oil-absorbing paper to simulate the loss of lubricating liquid, and the sliding rate of the droplet on the surface after the loss occurred was immediately tested (droplet: 15 μL), then the sliding rate of the droplet on the surface after the surface was self-supplied at room temperature for 20 min was tested, and the surface was continuously wiped with oil-absorbing paper, which was a cycle, and the above operation was repeated in the experiment.

[0116] Table 1 Test results of biomass carbon oil storage long-acting super-smooth anti-icing coating

[0117]

[0118] The above merely illustrates the specific embodiments of the present application, but the technical features of the present application are not limited thereto. Any simple change, equivalent replacement or modification made on the basis of the present application to solve the basically same technical problem and realize the basically same technical effect is included in the protection scope of the present application.

Claims

1. A method for preparing an oil-storage type long-lasting super-slip anti-icing coating, characterized in that The steps include: (1) Preparation of biomass carbon oil storage cells: Dispersing 1-100 parts by weight of surface amino-modified biomass carbon oil storage units and 1-500 parts by weight of dimethyl silicone oil in 100-1000 parts by weight of solvent α, stirring at 25° C. for 12 hours, and removing the solvent by rotary evaporation to obtain biomass carbon oil storage cells; (2) Preparation of dihydroxy-modified glycidyl methacrylate: Dissolving 1-100 parts by weight of glycidyl methacrylate, 1-100 parts by weight of thioglycerol, and 1-10 parts by weight of dimethylphenylphosphine in solvent β, and reacting at 30-60° C. for 2-6 hours to obtain dihydroxy-modified glycidyl methacrylate; (3) Preparation of coating silicone polyurethane body: 10-100 parts by weight of a dual-terminal reactive polydimethylsiloxane and 1-10 parts by weight of a polyisocyanate are dissolved in 10-100 parts by weight of solvent α, mixed, and heated under a nitrogen atmosphere at 60-80°C for 1-4 hours to obtain an isocyanate-terminated prepolymer. 1-10 parts by weight of a bishydroxy / amino disulfide compound and 1-10 parts by weight of bishydroxy-modified glycidyl methacrylate are then added, mixed, and heated under a nitrogen atmosphere at 60-80°C for 1-4 hours to prepare a silicone polyurethane liquid as the main polymer of the coating; (4) Preparation of anti-icing coating: 1-50 parts by weight of the biomass carbon oil storage cells prepared in the above (2) are added to the organosilicon polyurethane liquid prepared in the above (4), and the cells are evenly dispersed to obtain a biomass carbon oil storage long-lasting super-slip anti-icing coating.

2. The method for preparing an oil-storage type long-lasting super-slip anti-icing coating according to claim 1, characterized in that: Preparation of a surface amination biomass carbon oil storage unit, comprising: Solution A: Disperse 1-100 parts by weight of biomass carbon in 1-100 parts by weight of solvent water and 100-1000 parts by weight of solvent ethanol; Solution B: Dissolve 1-100 parts by weight of a silane coupling agent and 1-100 parts by weight of aqueous ammonia in 100-1000 parts by weight of ethanol; Solution B was added to solution A, washed with ethanol and water, and centrifuged to obtain a solid, which was freeze-dried to obtain a surface amination biomass carbon oil storage unit.

3. The method for preparing an oil-storage type long-lasting super-slip anti-icing coating according to claim 2, characterized in that: The biomass carbon is selected from a mixture of one or more of carbon nanotubes, activated carbon, carbon microspheres, carbon aerogels, porous carbon, and lignin-derived carbon.

4. The method for preparing an oil-storage type long-lasting super-slip anti-icing coating according to claim 2, characterized in that: The silane coupling agent is selected from a mixture of one or more of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane.

5. The method for preparing an oil-storage type long-lasting super-slip anti-icing coating according to claim 1, characterized in that: The dimethyl silicone oil used is a mixture of one or more of dimethyl silicone oil with a viscosity of 100 mPa·s, dimethyl silicone oil with a viscosity of 50 mPa·s, dimethyl silicone oil with a viscosity of 20 mPa·s, and dimethyl silicone oil with a viscosity of 10 mPa·s.

6. The method for preparing an oil-storage type long-lasting super-slip anti-icing coating according to claim 1, characterized in that: The solvent α is selected from a mixture of one or more of ethanol, tetrahydrofuran, acetone, methanol, dichloromethane, and hexane; the solvent β is selected from a mixture of one or more of ethanol, tetrahydrofuran, acetone, methanol, dichloromethane, and hexane.

7. The method for preparing an oil-storage type long-lasting super-slip anti-icing coating according to claim 1, characterized in that: The weight average molecular weight of the dual-end reactive polydimethylsiloxane is 1000-10000; the dual-end groups in the molecular formula are one or more of hydroxypropyl, aminopropyl and epoxy groups.

8. The method for preparing an oil-storage type long-lasting super-slip anti-icing coating according to claim 1, characterized in that: The polyisocyanate is a diisocyanate and a triisocyanate, and is selected from a mixture of one or more of diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, and triphenylmethane triisocyanate.

9. The method for preparing an oil-storage type long-lasting super-slip anti-icing coating according to claim 1, characterized in that: The dihydroxy / amino disulfide compound is selected from a mixture of one or more of 3,3'-dihydroxydiphenyl disulfide, 2,2'-diaminodiphenyl disulfide, 4,4'-diaminodiphenyl disulfide, bis(4-hydroxyphenyl) disulfide, and bis(2-hydroxyethyl) disulfide.

10. A method for coating and using an oil storage type long-lasting super-slip anti-icing coating according to claims 1-9, characterized in that The method comprises the following steps: cleaning the surface to be sprayed, applying the anti-icing coating on the surface to be sprayed by air spraying, with the coating thickness of the wet film being 100-1000 μm, and fully drying under ventilated and dry room temperature conditions to obtain a biomass carbon oil storage long-lasting super-slip anti-icing coating.

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