Dynamic recovery super-lubricity liquid anti-icing coating and preparation method thereof

Abstract

The invention discloses a dynamically recycled super-lubricity liquid anti-icing coating and a preparation method thereof. The dynamic recovery super-lubricity liquid anti-icing is formed by uniformly distributing a polymer substrate and a super-lubricity component formed in the polymer substrate. The polymer substrate is composed of soft elastic silicone rubber Ecoflex0030 and Dow Corning 184, so that the substrate has the capacity of thermal expansion and cold contraction, and can shrink in a low-temperature icing environment to release internal super-smooth liquid to the surface of the coating, so that the effect of easy ice shedding is achieved; and when the temperature rises, the base body expands, so that the super-smooth liquid on the surface of the coating is recovered into the base body for storage, the effect of reducing the loss of the super-smooth liquid is achieved, and the service life of the dynamic recovery super-smooth liquid anti-icing coating is remarkably prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of super-lubricant liquid material anti-icing, and in particular relates to a dynamically recyclable super-lubricant liquid injected porous material coating and a preparation method thereof. Background Art

[0002] In high-cold and high-humidity areas, ice and icing are very likely to occur, which seriously threatens the safe operation of road transportation, power systems, and aircraft operations. Currently, mature de-icing methods often consume a lot of manpower and material resources, such as mechanical vibration de-icing and direct current ice melting. Therefore, functional coating anti-icing has attracted people's attention as a new anti-icing method. Among them, the extremely low ice adhesion of the liquid injected into the porous surface, that is, the super-slip coating, has great advantages for anti-icing. However, the lubricating fluid on the porous surface will gradually disappear with the increase in the number of de-icing times, thereby losing the super-slip ability, greatly increasing the ice adhesion strength, and seriously reducing the anti-icing effect. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned shortcomings and provide a dynamically recoverable super-slip liquid anti-icing coating and a preparation method thereof.

[0004] A dynamically recoverable super-lubricant liquid anti-icing coating, comprising a polymer substrate and a super-lubricant component formed in the polymer substrate; the polymer substrate comprises soft elastic silicone rubber; the soft elastic silicone rubber comprises Ecoflex 0030 and Dow Corning 184; the super-lubricant component is composed of a super-lubricant liquid and porous microparticles storing the super-lubricant liquid.

[0005] The thickness of the dynamic recovery super-slip liquid anti-icing coating is 1 mm to 3 mm; the particle size of the porous microparticles is 5 μm to 20 μm.

[0006] The mass ratio of the polymer substrate to the super-slip component is 2:(0.5-2); the mass ratio of Ecoflex 0030 to Dow Corning 184 in the polymer substrate is (1-6):1.

[0007] The porous microparticles are one or more of zeolite, hollow silica microspheres, diatomaceous earth, and carbon black; the super-lubricating liquid is one or more of ethylene glycol, glycerol, liquid paraffin, and n-hexadecane.

[0008] A method for preparing a dynamically recyclable super-slip liquid anti-icing coating comprises the following steps:

[0009] (1) Ecoflex 0030 and Dow Corning 184 are uniformly mixed in a solvent, and the corresponding curing agent is added and cured to form a polymer substrate;

[0010] (2) Saturated adsorption of super-lubricant liquid inside porous microparticles to form super-lubricant components;

[0011] (3) The super-lubricant component and the pre-curing polymer base solution are uniformly mixed to obtain the dynamically recoverable super-lubricant liquid anti-icing coating after curing.

[0012] The solvent in step (1) is one or more of ethyl acetate, butyl acetate, and tetrahydrofuran; in the polymer solution, the concentration of Ecoflex0030 is 70wt% to 90wt%, and the concentration of Dow Corning 184 is 40wt% to 90wt%; the uniform mixing is carried out at 25°C to 30°C and magnetic stirring at 800rpm to 1000rpm for 0.5h to 1.5h.

[0013] The porous microparticles in step (2) are subjected to hydrophobic and lipophilic modification treatment, that is, the porous microparticles are dispersed in a mixed solution of anhydrous ethanol and a perfluorosilane coupling agent, ultrasonically dispersed, and then magnetically stirred to obtain a sol, which is then washed and dried to obtain a sol;

[0014] The porous microparticles are one or more of zeolite, hollow silica microspheres, diatomaceous earth, and carbon black; the perfluorosilane coupling agent is one or more of perfluorooctyltriethoxysilane and tridecafluorooctyltriethoxysilane;

[0015] The mass ratio of the ethanol to the perfluorosilane coupling agent is (70-90):1;

[0016] In the mixed solution, the concentration of the porous microparticles is 7wt% to 10wt%;

[0017] The ultrasonic dispersion is performed for 0.5 to 1.5 hours, and the magnetic stirring is performed at a speed of 800 rpm to 1000 rpm for 0.5 to 1 hour.

[0018] The porous microparticles are loaded with a super-lubricant liquid, comprising the following steps: mixing the porous microparticles and the super-lubricant liquid, and then magnetically stirring the mixture under vacuum to obtain the super-lubricant component after uniform mixing;

[0019] The super-lubricant liquid includes one or more of ethylene glycol, propylene glycol, liquid paraffin, and n-hexadecane; the mass ratio of the porous microparticles to the super-lubricant liquid is 1:(0.5-1.5); the duration of the magnetic stirring is 0.5h-1.5h; the rotation speed of the magnetic stirring is 800rpm-1000rpm.

[0020] Step (3) specifically includes the following processes: fully mixing the polymer base solution and the super-slippery component, uniformly coating the mixed solution on the desired surface using a coating machine with adjustable thickness, and drying and curing in an oven to obtain a dynamically recoverable super-slippery liquid anti-icing coating.

[0021] Preferably, a curing agent is added to the polymer base solution, and the corresponding curing agent mass of Ecoflex 0030 and Dow Corning 184 is equal to the mass of the resin used;

[0022] After adding the curing agent, the super-slip component is added to the polymer solution and magnetic stirring is performed; the duration of the magnetic stirring is 0.2 to 1 hour; the speed of the magnetic stirring is 800 rpm to 1000 rpm;

[0023] The thickness of the coating machine is adjusted to 1 mm to 3 mm; the drying and curing temperature is 50° C. to 70° C.; and the drying and curing time is 1.5 h to 3 h.

[0024] Beneficial effects of the present invention: The present invention provides a dynamically recoverable super-slippery liquid anti-icing coating, wherein the elastic polymer substrate and the internal super-slippery components together constitute the dynamically recoverable super-slippery liquid anti-icing coating, wherein the polymer substrate is composed of soft elastic silicone rubber Ecoflex0030 and Dow Corning 184, so that the substrate has the ability to expand and contract with heat, and can shrink in a low-temperature icing environment to release the internal super-slippery liquid to the coating surface, thereby achieving the effect of easy ice removal; and also when the temperature rises, the substrate expands, thereby recovering the super-slippery liquid on the coating surface into the interior of the substrate for storage, thereby achieving the effect of slowing down the loss of super-slippery liquid and significantly extending the service life of the dynamically recoverable super-slippery liquid anti-icing coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a scanning electron microscope image of the coating surface microstructure provided in Example 1.

[0026] Figure 2 Schematic diagram of the self-cleaning ability of the coating surface provided in Example 1.

[0027] Figure 3 Schematic diagram of wear resistance testing instrument.

[0028] Figure 4 The contact angle and rolling angle variation trend diagram of the coating wear resistance test provided in Example 1.

[0029] Figure 5 The process of dynamically releasing the super-lubricant liquid of the coating to the coating surface and recovering it as the temperature changes.

[0030] Figure 6 Schematic diagram of the coating ice adhesion test device. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present invention. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0032] It should be noted that all raw materials and / or reagents in the examples of the present invention are purchased on the market or prepared according to conventional methods well known to those skilled in the art.

[0033] This embodiment provides a dynamically recoverable super-slippery liquid anti-icing coating, a dynamically recoverable super-slippery liquid anti-icing coating, the dynamically recoverable super-slippery liquid anti-icing coating comprising a polymer substrate and a super-slippery component formed in the polymer substrate;

[0034] The polymer substrate is composed of soft elastic silicone rubber;

[0035] The soft elastic silicone rubber is mainly composed of Ecoflex0030 and Dow Corning 184 blended;

[0036] The super-lubricant component is mainly composed of super-lubricant liquid stored in porous microparticles.

[0037] The dynamic recovery super-slippery liquid anti-icing coating uses a soft elastic polymer substrate and internal super-slippery components, and utilizes the thermal expansion and contraction of the soft elastic polymer substrate to achieve contraction in a low-temperature icing environment so that the internal super-slippery liquid is released to the coating surface, which has the effect of easy de-icing, thereby delaying the icing process. In addition, the thermal expansion and contraction of the soft elastic polymer substrate can also achieve the expansion of the substrate when the temperature rises, so that the super-slippery liquid on the coating surface is recovered to the inside of the substrate for storage, thereby slowing down the loss of super-slippery liquid and significantly extending the service life of the dynamic recovery super-slippery liquid anti-icing coating.

[0038] Ecoflex0030 and Dow Corning 184 are evenly blended to form a polymer base, providing good thermal expansion and contraction characteristics and elasticity, ensuring the dynamic controllable release and recovery of the super-slippery liquid of the coating and long-term easy ice-shedding stability. The porous microparticles are specially modified to have a certain degree of hydrophobicity and lipophilicity, allowing the porous microparticles to absorb more super-slippery liquid.

[0039] In some embodiments, the thickness of the dynamically recovered super-slippery liquid anti-icing coating is 1 mm to 3 mm; and the particle size of the porous microparticles is 5 μm to 20 μm.

[0040] The thickness of the super-hydrophobic photothermal anti-icing coating is controlled between 1mm and 3mm, which enables the coating to effectively prevent ice and de-ice while optimizing the use efficiency of the material and avoiding unnecessary increase in thickness leading to cost increases or decreased mechanical properties. In addition, the particle size of the porous microparticles is between 5μm and 20μm, which enables the porous microparticles to be evenly distributed in the coating to form a stable micro-nano composite structure, further enhancing the oil storage properties of the coating. Precise size control improves the overall performance of the coating, ensuring lasting anti-icing and wear-resistant effects in practical applications.

[0041] The thickness range of 1mm to 3mm can provide sufficient coverage to ensure the stability of the super-slippery liquid component, but will not affect the flexibility and adhesion of the coating due to excessive thickness. This thickness range also ensures that the content of super-slippery liquid in the coating is as high as possible, thereby extending the deicing time.

[0042] The particle size of porous microparticles is between 5μm and 20μm, which can increase the specific surface area of ​​the microparticles and increase the mass of super-lubricant liquid that can be adsorbed. At the same time, the porous microparticles within this particle size range are more evenly distributed in the coating, which helps to improve the strength and toughness of the coating and ensure that the coating has excellent anti-icing and de-icing performance under low temperature conditions.

[0043] In some embodiments, the mass ratio of the polymer substrate to the super-slippery component is 2:(0.5-2).

[0044] In some embodiments, the porous microparticles include one or more of zeolite, hollow silica microspheres, diatomaceous earth, and carbon black;

[0045] In some embodiments, the super-lubricating liquid includes one or more of ethylene glycol, glycerol, liquid paraffin, and n-hexadecane.

[0046] Ecoflex0030 and Dow Corning 184 are evenly blended to form a polymer base, providing good thermal expansion and contraction characteristics and elasticity, ensuring the dynamic controllable release and recovery of the super-slippery liquid of the coating and long-term easy ice-shedding stability. In addition, the porous microparticles are specially modified to have a certain degree of hydrophobicity and lipophilicity, allowing the porous microparticles to absorb more super-slippery liquid.

[0047] By controlling the mixing ratio of Ecoflex0030 and Dow Corning 184, as well as the mass ratio of Ecoflex0030 and Dow Corning 184 to the super-slip component, the coating performance is further optimized, so that the coating has excellent mechanical strength and retains good flexibility, thereby improving the wear resistance and durability of the coating. In addition, by adjusting the ratio of polymer and super-slip component, the coating is finely controlled to further enhance the anti-icing and de-icing effects of the coating.

[0048] This embodiment provides a method for preparing a super-hydrophobic photothermal anti-icing coating, comprising the following steps:

[0049] Ecoflex0030 and Dow Corning 184 are uniformly mixed in a solvent, and the corresponding curing agent is added and cured to form a polymer base;

[0050] The super-lubricant liquid is saturatedly adsorbed inside the microporous particles to form a super-lubricant component;

[0051] The super-slip component and the pre-cured polymer substrate are uniformly mixed, and the dynamically recoverable super-slip liquid anti-icing coating is obtained after curing.

[0052] First, Ecoflex0030 and Dow Corning 184 are diluted in a dispersant, and then the diluted solvents are evenly mixed. The prepared super-slip component is evenly mixed with the polymer dilution liquid, and the corresponding curing agent is added and stirred evenly. Then, it is coated on the surface of the substrate and cured by drying to form a dynamically recoverable super-slip liquid anti-icing coating.

[0053] Ecoflex 0030 and Dow Corning 184 are dissolved in solvents and mixed to form a polymer matrix with ideal mechanical properties and flexibility. After coating this polymer matrix on the substrate surface, it can be firmly attached and form a uniform polymer matrix after drying.

[0054] The super-slippery component prepared inside the polymer substrate increases the absorption of super-slippery liquid through microporous particles, rather than relying solely on the substrate to store super-slippery liquid, thereby improving the durability of the anti-icing function. This component not only contains super-slippery liquid that has the effect of anti-icing and easy ice removal, but also the porous microparticles storing super-slippery liquid reduce the degradation of the mechanical properties of the polymer matrix caused by the direct storage of super-slippery liquid in the polymer matrix. In addition, the hydrophobic and lipophilic modification of the porous microparticles allows the porous microparticles to absorb more super-slippery liquid, and also provides a certain degree of hydrophobicity on the coating surface, so that the coating has a certain self-cleaning ability.

[0055] In some embodiments, the hydrophobic and lipophilic modification of porous microparticles comprises the following process:

[0056] The porous microparticles are dispersed in a mixed solution of anhydrous ethanol and a perfluorosilane coupling agent, and after ultrasonic dispersion, magnetic stirring is performed to obtain a sol, and then washed and dried to obtain the porous microparticles.

[0057] The porous microparticles are dispersed in ethanol to provide hydroxyl groups. If there are not enough hydroxyl groups on the surface of the porous microparticles, the perfluorosilane coupling agent cannot be successfully grafted onto the surface of the porous microparticles. This method allows a certain number of hydroxyl groups to be attached to the surface of the porous microparticles, so that the hydroxyl groups of the perfluorosilane coupling agent can undergo dehydration addition with the porous microparticles and thus be successfully grafted onto the porous microparticles. This method not only makes the porous microparticles hydrophobic, but also allows the porous microparticles to store more super-slippery liquids, greatly improving the service life of the coating.

[0058] In some embodiments, the porous microparticles include one or more of zeolite, hollow silica microspheres, diatomaceous earth, and carbon black;

[0059] The perfluorosilane coupling agent includes one or more of perfluorooctyltriethoxysilane and tridecafluorooctyltriethoxysilane;

[0060] The mass ratio of the ethanol to the perfluorosilane coupling agent is (70-90):1;

[0061] In the mixed solution, the concentration of the porous microparticles is 7wt% to 10wt%;

[0062] The duration of the ultrasonic dispersion is 0.5 to 1.5 hours; the rotation speed of the magnetic stirring is 800 rpm to 1000 rpm, and the duration is 0.5 to 1 hour.

[0063] Under the action of mixing and interconnecting two soft silicone rubbers, a copolymer with a three-dimensional structure is formed. This structure enhances the wear resistance and self-repairing function of the coating, allowing the coating to maintain its performance during long-term use. At the same time, the reasonable selection of the solvent and reaction temperature used ensures the efficiency and stability of the entire reaction and avoids the occurrence of side reactions.

[0064] In some embodiments, the ultra-slippery liquid is loaded into porous microparticles to obtain an ultra-slippery component, comprising the following process:

[0065] After the porous microparticles and the super-lubricant liquid are mixed, magnetic stirring is performed under a vacuum state, and the super-lubricant component is obtained after uniform mixing.

[0066] By preparing super-slippery components and forming a stable super-slippery liquid storage structure, the super-slippery liquid is stored in porous microparticles instead of directly in the elastic soft silicone rubber substrate, ensuring that the mechanical properties of the coating will not be reduced. The super-slippery liquid is a liquid alkane, which, after diffusing to the coating surface, can significantly reduce the adhesion strength of ice on the coating surface, thereby achieving the effect of easy ice removal.

[0067] In some embodiments, the super-lubricating liquid includes one or more of ethylene glycol, glycerol, liquid paraffin, and n-hexadecane;

[0068] The mass ratio of porous microparticles to super-lubricating liquid is 1:(0.5-1.5);

[0069] The duration of the magnetic stirring is 0.5h to 1.5h; the rotation speed of the magnetic stirring is 800rpm to 1000rpm.

[0070] Through the precise selection and proportion control of the dispersant and two soft silicone rubbers, this method ensures the mechanical properties and flexibility of the polymer substrate, ensures that it has the appropriate thermal expansion and contraction ability, can extrude the super-slippery liquid to the surface, and expand it to allow the super-slippery liquid to be recovered into the porous microparticles. At the same time, the frequent thermal expansion and contraction will not reduce the adhesion strength between the polymer substrate and the substrate material. Through the precise selection and proportion control of the dispersant and perfluorosilane coupling agent, it is ensured that the hydrophobic and lipophilic modification of the porous microparticles can be carried out smoothly and completely, so that it can absorb more super-slippery liquid and improve the anti-icing durability of the coating. Through the precise selection of the super-slippery liquid and the proportion control with the porous microparticles, the super-slippery liquid can be smoothly diffused to the coating surface in a low temperature environment, thereby reducing the adhesion of ice on the coating surface and achieving the purpose of easy ice removal.

[0071] Example 1

[0072] Embodiment 1 provides a dynamic recovery super-slippery liquid anti-icing coating, the dynamic recovery super-slippery liquid anti-icing coating comprising a polymer substrate and a super-slippery component formed in the polymer substrate;

[0073] The polymer substrate includes Ecoflex 0030 and Dow Corning 184;

[0074] The mass ratio of Ecoflex0030 and Dow Corning 184 is 6:1;

[0075] The super-lubricating component is composed of a super-lubricating liquid and porous micro-particles storing the super-lubricating liquid;

[0076] The mass ratio of polymer substrate to super-slippery component is 2:1;

[0077] The thickness of the dynamic recovery super-slippery liquid anti-icing coating is 2 mm; the particle size of the porous microparticles is D 50 is 10μm.

[0078] Embodiment 1 provides a method for preparing a soft elastic silicone rubber polymer substrate, comprising the following steps:

[0079] Step 1, dissolve 6g Ecoflex0030 in 2.5g tetrahydrofuran and 1g Dow Corning 184 in 1.5g tetrahydrofuran, magnetically stir at 800rpm for 0.5h, then mix the two evenly together, and magnetically stir at 800rpm for 1h to obtain a polymer base solution.

[0080] Embodiment 1 provides a method for preparing a super-slippery component, comprising the following steps:

[0081] Step 1, 8 g of diatomaceous earth and 1.5 g of perfluorooctyltriethoxysilane (FOTs) are dispersed in 90 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm for 1 h at room temperature to obtain a sol, which is then washed and dried to obtain modified diatomaceous earth;

[0082] Step 2: Take 4.5 g of the modified diatomaceous earth prepared in step 1 and 4.5 g of liquid paraffin (LP), and stir them magnetically at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0083] Embodiment 1 provides a method for preparing a dynamic recovery super-slippery liquid anti-icing coating, comprising the following steps:

[0084] Step 1, adding 6 g of Ecoflex0030 curing agent and 1 g of Dow Corning 184 curing agent to the polymer base solution, and then adding the super-slip component thereto, and magnetically stirring at a speed of 1000 rpm for 0.2 h at room temperature to obtain a uniformly mixed emulsion;

[0085] Step 2: Use an adjustable coating machine to evenly apply the emulsion prepared in step 1 on the surface of the substrate, setting the thickness to 2 mm, and then put it into an oven for drying and curing at 70°C for 2 hours to obtain a dynamic recycling super-slip liquid anti-icing coating. The surface microstructure of the coating is shown in the scanning electron microscope. Figure 1 shown.

[0086] Among them, the substrate is 45# steel sheet, and the surface is polished by grinding process until the roughness Ra value is less than 0.64μm. It is then ultrasonically cleaned in anhydrous ethanol and deionized water alternately, each time for 20 minutes, and then naturally dried for use.

[0087] Example 2

[0088] Embodiment 2 provides a dynamic recovery super-slippery liquid anti-icing coating, the dynamic recovery super-slippery liquid anti-icing coating comprising a polymer substrate and a super-slippery component formed in the polymer substrate;

[0089] The polymer substrate includes Ecoflex 0030 and Dow Corning 184;

[0090] The mass ratio of Ecoflex0030 and Dow Corning 184 is 6:1;

[0091] The super-lubricating component is composed of a super-lubricating liquid and porous micro-particles storing the super-lubricating liquid;

[0092] The mass ratio of polymer substrate to super-slippery component is 2:1;

[0093] The thickness of the dynamic recovery super-slippery liquid anti-icing coating is 1 mm; the particle size of the porous microparticles is D 50 is 10μm.

[0094] Embodiment 2 provides a method for preparing a soft elastic silicone rubber polymer substrate, comprising the following steps:

[0095] Step 1, dissolve 6g Ecoflex0030 in 2.5g tetrahydrofuran and 1g Dow Corning 184 in 1.5g tetrahydrofuran, magnetically stir at 800rpm for 0.5h, then mix the two evenly together, and magnetically stir at 800rpm for 1h to obtain a polymer base solution.

[0096] Embodiment 2 provides a method for preparing a super-slippery component, comprising the following steps:

[0097] Step 1, 8 g of diatomaceous earth and 1.5 g of perfluorooctyltriethoxysilane (FOTs) are dispersed in 90 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm for 1 h at room temperature to obtain a sol, which is then washed and dried to obtain modified diatomaceous earth;

[0098] Step 2: Take 4.5 g of the modified diatomaceous earth prepared in step 1 and 4.5 g of liquid paraffin (LP), and stir them magnetically at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0099] Embodiment 2 provides a method for preparing a dynamic recovery super-slip liquid anti-icing coating, comprising the following steps:

[0100] Step 1, adding 6 g of Ecoflex0030 curing agent and 1 g of Dow Corning 184 curing agent to the polymer base solution, and then adding the super-slip component thereto, and magnetically stirring at a speed of 1000 rpm for 0.2 h at room temperature to obtain a uniformly mixed emulsion;

[0101] Step 2: Use an adjustable coating machine to evenly apply the emulsion prepared in step 1 on the surface of the substrate, with a thickness of 2 mm, and then put it into an oven for drying and curing at 70°C for 2 hours to obtain a dynamic recycling super-slip liquid anti-icing coating.

[0102] Among them, the substrate is 45# steel sheet, and the surface is polished by grinding process until the roughness Ra value is less than 0.64μm. It is then ultrasonically cleaned in anhydrous ethanol and deionized water alternately, each time for 20 minutes, and then naturally dried for use.

[0103] Example 3

[0104] Embodiment 3 provides a dynamic recovery super-slippery liquid anti-icing coating, the dynamic recovery super-slippery liquid anti-icing coating comprising a polymer substrate and a super-slippery component formed in the polymer substrate;

[0105] The polymer substrate includes Ecoflex 0030 and Dow Corning 184;

[0106] The mass ratio of Ecoflex0030 and Dow Corning 184 is 6:1;

[0107] The super-lubricating component is composed of a super-lubricating liquid and porous micro-particles storing the super-lubricating liquid;

[0108] The mass ratio of polymer substrate to super-slippery component is 2:1;

[0109] The thickness of the dynamic recovery super-slippery liquid anti-icing coating is 3 mm; the particle size of the porous microparticles is D 50 is 10μm.

[0110] Embodiment 3 provides a method for preparing a soft elastic silicone rubber polymer substrate, comprising the following steps:

[0111] Step 1, dissolve 6g Ecoflex0030 in 2.5g tetrahydrofuran and 1g Dow Corning 184 in 1.5g tetrahydrofuran, magnetically stir at 800rpm for 0.5h, then mix the two evenly together, and magnetically stir at 800rpm for 1h to obtain a polymer base solution.

[0112] Embodiment 3 provides a method for preparing a super-slippery component, comprising the following steps:

[0113] Step 1, 8 g of diatomaceous earth and 1.5 g of perfluorooctyltriethoxysilane (FOTs) are dispersed in 90 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm for 1 h at room temperature to obtain a sol, which is then washed and dried to obtain modified diatomaceous earth;

[0114] Step 2: Take 4.5 g of the modified diatomaceous earth prepared in step 1 and 4.5 g of liquid paraffin (LP), and stir them magnetically at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0115] Embodiment 3 provides a method for preparing a dynamic recovery super-slip liquid anti-icing coating, comprising the following steps:

[0116] Step 1, adding 6 g of Ecoflex0030 curing agent and 1 g of Dow Corning 184 curing agent to the polymer base solution, and then adding the super-slip component thereto, and magnetically stirring at a speed of 1000 rpm for 0.2 h at room temperature to obtain a uniformly mixed emulsion;

[0117] Step 2: Use an adjustable coating machine to evenly apply the emulsion prepared in step 1 on the surface of the substrate, setting the thickness to 2 mm, and then place it in an oven for drying and curing at 70°C for 2 hours to obtain a dynamically recoverable super-slip liquid anti-icing coating.

[0118] Among them, the substrate is 45# steel sheet, and the surface is polished by grinding process until the roughness Ra value is less than 0.64μm. It is then ultrasonically cleaned in anhydrous ethanol and deionized water alternately, each time for 20 minutes, and then naturally dried for use.

[0119] Example 4

[0120] Embodiment 4 provides a dynamic recovery super-slippery liquid anti-icing coating, the dynamic recovery super-slippery liquid anti-icing coating comprising a polymer substrate and a super-slippery component formed in the polymer substrate;

[0121] The polymer substrate includes Ecoflex 0030 and Dow Corning 184;

[0122] The mass ratio of Ecoflex0030 and Dow Corning 184 is 6:1;

[0123] The super-lubricating component is composed of a super-lubricating liquid and porous micro-particles storing the super-lubricating liquid;

[0124] The mass ratio of polymer substrate to super-slippery component is 2:1;

[0125] The thickness of the dynamic recovery super-slippery liquid anti-icing coating is 2 mm; the particle size of the porous microparticles is D 50 is 10μm.

[0126] Embodiment 4 provides a method for preparing a soft elastic silicone rubber polymer substrate, comprising the following steps:

[0127] Step 1, dissolve 6 g of Ecoflex 0030 in 2.5 g of tetrahydrofuran and 2 g of Dow Corning 184 in 0.22 g of tetrahydrofuran, respectively, magnetically stir at a speed of 800 rpm for 0.5 h, then evenly mix the two together, and magnetically stir at a speed of 800 rpm for 1 h to obtain a polymer base solution.

[0128] Embodiment 4 provides a method for preparing a super-slippery component, comprising the following steps:

[0129] Step 1, 8 g of diatomaceous earth and 1.5 g of perfluorooctyltriethoxysilane (FOTs) are dispersed in 90 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm for 1 h at room temperature to obtain a sol, which is then washed and dried to obtain modified diatomaceous earth;

[0130] Step 2: Take 4.5 g of the modified diatomaceous earth prepared in step 1 and 4.5 g of liquid paraffin (LP), and stir them magnetically at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0131] Embodiment 4 provides a method for preparing a dynamically recovered super-slip liquid anti-icing coating, comprising the following steps:

[0132] Step 1, adding 6 g of Ecoflex0030 curing agent and 2 g of Dow Corning 184 curing agent to the polymer base solution, and then adding the super-slip component thereto, and magnetically stirring at a speed of 1000 rpm for 0.2 h at room temperature to obtain a uniformly mixed emulsion;

[0133] Step 2: Use an adjustable coating machine to evenly apply the emulsion prepared in step 1 on the surface of the substrate, setting the thickness to 2 mm, and then place it in an oven for drying and curing at 70°C for 2 hours to obtain a dynamically recoverable super-slip liquid anti-icing coating.

[0134] Among them, the substrate is 45# steel sheet, and the surface is polished by grinding process until the roughness Ra value is less than 0.64μm. It is then ultrasonically cleaned in anhydrous ethanol and deionized water alternately, each time for 20 minutes, and then naturally dried for use.

[0135] Example 5

[0136] Example 5 provides a dynamically recoverable super-slip liquid anti-icing coating that is the same as the coating provided in Example 1.

[0137] The preparation method of the dynamically recovered super-slip liquid anti-icing coating provided in Example 5 is the same as the preparation method provided in Example 1.

[0138] Embodiment 5 provides a method for preparing a soft elastic silicone rubber polymer substrate, comprising the following steps:

[0139] Step 1, dissolving 3.5 g of Ecoflex 0030 in 0.4 g of tetrahydrofuran and 3.5 g of Dow Corning 184 in 3.5 g of tetrahydrofuran, respectively, magnetically stirring at a speed of 800 rpm for 0.5 h, then evenly mixing the two together, and magnetically stirring at a speed of 800 rpm for 1 h to obtain a polymer base solution.

[0140] Example 5 provides a method for preparing a dynamically recovered super-slip liquid anti-icing coating, comprising the following steps:

[0141] Step 1, adding 3.5 g of Ecoflex0030 curing agent and 3.5 g of Dow Corning 184 curing agent to the polymer base solution, and then adding the super-slip component thereto, and magnetically stirring at a speed of 1000 rpm for 0.2 h at room temperature to obtain a uniformly mixed emulsion;

[0142] Step 2: Use an adjustable coating machine to evenly apply the emulsion prepared in step 1 on the surface of the substrate, setting the thickness to 2 mm, and then place it in an oven for drying and curing at 70°C for 2 hours to obtain a dynamically recoverable super-slip liquid anti-icing coating.

[0143] Example 6

[0144] Example 6 provides a dynamically recoverable super-slip liquid anti-icing coating that is the same as the coating provided in Example 1.

[0145] The preparation method of the dynamically recovered super-slip liquid anti-icing coating provided in Example 6 is the same as the preparation method provided in Example 1.

[0146] A method for preparing a soft elastic silicone rubber polymer substrate provided in Example 6 comprises the following steps:

[0147] Step 1, dissolve 3.5 g Ecoflex0030 in 0.4 g ethyl acetate and 3.5 g Dow Corning 184 in 3.5 g ethyl acetate, magnetically stir at 800 rpm for 0.5 h, then mix the two evenly together, and magnetically stir at 800 rpm for 1 h to obtain a polymer base solution.

[0148] Example 7

[0149] Example 7 provides a dynamically recoverable super-slip liquid anti-icing coating that is the same as the coating provided in Example 1.

[0150] The preparation method of the dynamically recovered super-slip liquid anti-icing coating provided in Example 7 is the same as the preparation method provided in Example 1.

[0151] Embodiment 7 provides a method for preparing a super-slippery component, comprising the following steps:

[0152] Step 1, 6.9 g of diatomaceous earth and 1.3 g of perfluorooctyltriethoxysilane (FOTs) are dispersed in 91 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm at room temperature for 1 h to obtain a sol, which is then washed and dried to obtain modified diatomaceous earth;

[0153] Step 2: Take 6 g of the modified diatomaceous earth prepared in step 1 and 3 g of liquid paraffin (LP), and stir them magnetically at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0154] Example 8

[0155] Example 8 provides a dynamically recoverable super-slip liquid anti-icing coating that is the same as the coating provided in Example 1.

[0156] The preparation method of the dynamically recovered super-slip liquid anti-icing coating provided in Example 8 is the same as the preparation method provided in Example 1.

[0157] Embodiment 8 provides a method for preparing a super-slippery component, comprising the following steps:

[0158] Step 1, 10.1 g of diatomaceous earth and 1 g of perfluorooctyltriethoxysilane (FOTs) are dispersed in 90 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm at room temperature for 1 h to obtain a sol, which is then washed and dried to obtain modified diatomaceous earth;

[0159] Step 2: Take 3.6 g of the modified diatomaceous earth prepared in step 1 and 5.4 g of liquid paraffin (LP), and stir them magnetically at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0160] Comparative Example 1

[0161] Comparative Example 1 provides a dynamically recyclable super-slip liquid anti-icing coating, which differs from the coating provided in Example 1 in that the mass of the super-slip component is doubled. The details are as follows:

[0162] Comparative Example 1 provides a dynamically recoverable super-slippery liquid anti-icing coating, the dynamically recoverable super-slippery liquid anti-icing coating comprising a polymer substrate and a super-slippery component formed in the polymer substrate;

[0163] The polymer substrate includes Ecoflex 0030 and Dow Corning 184;

[0164] The mass ratio of Ecoflex0030 and Dow Corning 184 is 6:1;

[0165] The super-lubricating component is composed of a super-lubricating liquid and porous micro-particles storing the super-lubricating liquid;

[0166] The mass ratio of polymer substrate to super-slippery component is 1:1;

[0167] The thickness of the dynamic recovery super-slippery liquid anti-icing coating is 2 mm; the particle size of the porous microparticles is D 50 is 10μm.

[0168] Comparative Example 1 provides a method for preparing a soft elastic silicone rubber polymer substrate, comprising the following steps:

[0169] Step 1, dissolve 6g Ecoflex0030 in 2.5g tetrahydrofuran and 1g Dow Corning 184 in 1.5g tetrahydrofuran, magnetically stir at 800rpm for 0.5h, then mix the two evenly together, and magnetically stir at 800rpm for 1h to obtain a polymer base solution.

[0170] Comparative Example 1 provides a method for preparing a super-slip component, comprising the following steps:

[0171] Step 1, 8 g of diatomaceous earth and 1.5 g of perfluorooctyltriethoxysilane (FOTs) are dispersed in 90 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm for 1 h at room temperature to obtain a sol, which is then washed and dried to obtain modified diatomaceous earth;

[0172] Step 2: Take 9 g of the modified diatomaceous earth and 9 g of liquid paraffin (LP) prepared in step 1 and magnetically stir them at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0173] Comparative Example 1 provides a method for preparing a dynamic recovery super-slip liquid anti-icing coating, comprising the following steps:

[0174] Step 1, adding 6 g of Ecoflex0030 curing agent and 1 g of Dow Corning 184 curing agent to the polymer base solution, and then adding the super-slip component thereto, and magnetically stirring at a speed of 1000 rpm for 0.2 h at room temperature to obtain a uniformly mixed emulsion;

[0175] Step 2: Use an adjustable coating machine to evenly apply the emulsion prepared in step 1 on the surface of the substrate, setting the thickness to 2 mm, and then place it in an oven for drying and curing at 70°C for 2 hours to obtain a dynamically recoverable super-slip liquid anti-icing coating.

[0176] Among them, the substrate is 45# steel sheet, and the surface is polished by grinding process until the roughness Ra value is less than 0.64μm. It is then ultrasonically cleaned in anhydrous ethanol and deionized water alternately, each time for 20 minutes, and then naturally dried for use.

[0177] Comparative Example 2

[0178] Comparative Example 2 provides a dynamically recyclable super-slippery liquid anti-icing coating, which differs from the coating provided in Example 1 in that the mass of the super-slippery component is halved. The details are as follows:

[0179] Comparative Example 2 provides a dynamically recoverable super-slippery liquid anti-icing coating, the dynamically recoverable super-slippery liquid anti-icing coating comprising a polymer substrate and a super-slippery component formed in the polymer substrate;

[0180] The polymer substrate includes Ecoflex 0030 and Dow Corning 184;

[0181] The mass ratio of Ecoflex0030 and Dow Corning 184 is 6:1;

[0182] The super-lubricating component is composed of a super-lubricating liquid and porous micro-particles storing the super-lubricating liquid;

[0183] The mass ratio of polymer substrate to super-slippery component is 2:0.5;

[0184] The thickness of the dynamic recovery super-slippery liquid anti-icing coating is 2 mm; the particle size of the porous microparticles is D 50 is 10μm.

[0185] Comparative Example 2 provides a method for preparing a soft elastic silicone rubber polymer substrate, comprising the following steps:

[0186] Step 1, dissolve 6g Ecoflex0030 in 2.5g tetrahydrofuran and 1g Dow Corning 184 in 1.5g tetrahydrofuran, magnetically stir at 800rpm for 0.5h, then mix the two evenly together, and magnetically stir at 800rpm for 1h to obtain a polymer base solution.

[0187] Comparative Example 2 provides a method for preparing a super-slippery component, comprising the following steps:

[0188] Step 1, 8 g of diatomaceous earth and 1.5 g of perfluorooctyltriethoxysilane (FOTs) are dispersed in 90 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm for 1 h at room temperature to obtain a sol, which is then washed and dried to obtain modified diatomaceous earth;

[0189] Step 2: Take 2.25 g of the modified diatomaceous earth prepared in step 1 and 2.25 g of liquid paraffin (LP), and stir them magnetically at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0190] Comparative Example 2 provides a method for preparing a dynamic recovery super-slip liquid anti-icing coating, comprising the following steps:

[0191] Step 1, adding 6 g of Ecoflex0030 curing agent and 1 g of Dow Corning 184 curing agent to the polymer base solution, and then adding the super-slip component thereto, and magnetically stirring at a speed of 1000 rpm for 0.2 h at room temperature to obtain a uniformly mixed emulsion;

[0192] Step 2: Use an adjustable coating machine to evenly apply the emulsion prepared in step 1 on the surface of the substrate, setting the thickness to 2 mm, and then place it in an oven for drying and curing at 70°C for 2 hours to obtain a dynamically recoverable super-slip liquid anti-icing coating.

[0193] The substrate is a 45# steel sheet, and the surface is polished by a grinding process until the roughness Ra value is less than 0.64 μm. Anhydrous ethanol and deionized water are used for ultrasonic cleaning alternately, each time for 20 minutes, and the surface is dried naturally for later use.

[0194] Comparative Example 3 provides a dynamically recoverable super-slip liquid anti-icing coating, which differs from the coating provided in Example 1 in that the silicone rubber dispersant is replaced by an equal amount of tetrahydrofuran with butyl acetate.

[0195] The preparation method of the super-slippery component provided in Comparative Example 3 is the same as that in Example 1.

[0196] Comparative Example 3 provides a method for preparing a soft elastic silicone rubber polymer substrate, comprising the following steps:

[0197] Step 1, dissolving 6 g of Ecoflex 0030 in 2.5 g of butyl acetate and 1 g of Dow Corning 184 in 1.5 g of butyl acetate, respectively, magnetically stirring at a speed of 800 rpm for 0.5 h, then evenly mixing the two together, and magnetically stirring at a speed of 800 rpm for 1 h to obtain a polymer base solution.

[0198] Comparative Example 3 provides a dynamically recoverable super-slip liquid anti-icing coating having the same preparation method as that provided in Example 1.

[0199] Among them, the substrate is 45# steel sheet, and the surface is polished by grinding process until the roughness Ra value is less than 0.64μm. It is then ultrasonically cleaned in anhydrous ethanol and deionized water alternately, each time for 20 minutes, and then naturally dried for use.

[0200] Comparative Example 4

[0201] Comparative Example 4 provides a dynamic recovery super-slip liquid anti-icing coating. The difference from the coating provided in Example 1 is that an equal amount of perfluorooctyl triethoxysilane is replaced with tridecafluorooctyl triethoxysilane, as follows:

[0202] Comparative Example 4 provides a method for preparing a soft elastic silicone rubber polymer substrate, which is the same as that of Example 1;

[0203] Comparative Example 4 provides a method for preparing a super-slippery component, comprising the following steps:

[0204] Step 1, 8 g of diatomaceous earth and 1.5 g of tridecafluorooctyltriethoxysilane are dispersed in 90 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm for 1 h at room temperature to obtain a sol, and then the sol is washed and dried to obtain modified diatomaceous earth;

[0205] Step 2: Take 2.25 g of the modified diatomaceous earth prepared in step 1 and 2.25 g of liquid paraffin (LP), and stir them magnetically at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0206] Comparative Example 4 provides a dynamically recoverable super-slip liquid anti-icing coating having the same preparation method as that provided in Example 1.

[0207] Among them, the substrate is 45# steel sheet, and the surface is polished by grinding process until the roughness Ra value is less than 0.64μm. It is then ultrasonically cleaned in anhydrous ethanol and deionized water alternately, each time for 20 minutes, and then naturally dried for use.

[0208] Comparative Example 5

[0209] Comparative Example 5 provides a dynamic recovery super-slip liquid anti-icing coating. The difference from the coating provided in Example 1 is that the porous microparticles are replaced by zeolites of the same particle size in equal amounts from diatomaceous earth, as follows:

[0210] Comparative Example 5 provides a method for preparing a soft elastic silicone rubber polymer substrate, which is the same as that of Example 1;

[0211] Comparative Example 5 provides a method for preparing a super-slippery component, comprising the following steps:

[0212] Step 1, 8 g of zeolite and 1.5 g of tridecafluorooctyltriethoxysilane are dispersed in 90 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm at room temperature for 1 h to obtain a sol, which is then washed and dried to obtain a modified zeolite;

[0213] Step 2: Take 4.5 g of the modified diatomaceous earth prepared in step 1 and 4.5 g of liquid paraffin (LP), and stir them magnetically at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0214] Comparative Example 5 provides a dynamically recoverable super-slip liquid anti-icing coating having the same preparation method as that provided in Example 1.

[0215] Among them, the substrate is 45# steel sheet, and the surface is polished by grinding process until the roughness Ra value is less than 0.64μm. It is then ultrasonically cleaned in anhydrous ethanol and deionized water alternately, each time for 20 minutes, and then naturally dried for use.

[0216] Comparative Example 6

[0217] Comparative Example 6 provides a dynamically recyclable super-lubricant liquid anti-icing coating, which differs from the coating provided in Example 1 in that the super-lubricant liquid is replaced by liquid paraffin with ethylene glycol of the same mass, as follows:

[0218] Comparative Example 6 provides a method for preparing a soft elastic silicone rubber polymer substrate, which is the same as that of Example 1;

[0219] Comparative Example 6 provides a method for preparing a super-slippery component, comprising the following steps:

[0220] Step 1, 8 g of diatomaceous earth and 1.5 g of tridecafluorooctyltriethoxysilane are dispersed in 90 g of ethanol, and after ultrasonic dispersion for 0.5 h, magnetic stirring is performed at a speed of 1000 rpm for 1 h at room temperature to obtain a sol, and then the sol is washed and dried to obtain modified diatomaceous earth;

[0221] Step 2: Take 4.5 g of the modified diatomaceous earth prepared in step 1 and 4.5 g of ethylene glycol and stir them magnetically at a speed of 800 rpm for 30 minutes under a vacuum environment to obtain porous microparticles that fully absorb the super-lubricant liquid, i.e., the super-lubricant component.

[0222] Comparative Example 6 provides a dynamically recoverable super-slip liquid anti-icing coating having the same preparation method as that provided in Example 1.

[0223] The substrate is a 45# steel sheet, and the surface is polished by a grinding process until the roughness Ra value is less than 0.64 μm. Anhydrous ethanol and deionized water are used for ultrasonic cleaning alternately, each time for 20 minutes, and the surface is dried naturally for later use.

[0224] Comparative Example 7 provides a dynamic recovery super-slip liquid anti-icing coating. The difference between the coating provided in Example 1 is that the particle size D of the diatomaceous earth is 50 5μm.

[0225] The preparation method of the soft elastic silicone rubber polymer substrate, the preparation method of the super-lubricant component and the preparation method of the dynamically recovered super-lubricant liquid anti-icing coating provided in Comparative Example 7 are the same as those in Example 1.

[0226] Comparative Example 8

[0227] Comparative Example 8 provides a dynamic recovery super-slip liquid anti-icing coating. The difference between the coating provided in Example 1 is that the particle size D of the diatomaceous earth is 50 is 20μm.

[0228] The preparation method of the soft elastic silicone rubber polymer substrate, the preparation method of the super-lubricant component and the preparation method of the dynamically recovered super-lubricant liquid anti-icing coating provided in Comparative Example 8 are the same as those in Example 1.

[0229] Performance Testing

[0230] (1) Coating self-cleaning ability test

[0231] According to the steps of preparing the dynamic recovery super-slip liquid anti-icing coating in Example 1, a 5cm*5cm*2mm coating was prepared, and anhydrous copper sulfate powder and fine sand were used to simulate dust and impurities in daily life. Figure 2 As shown in a and b, the aluminum plate with coating is placed in a petri dish at an angle and a layer of anhydrous copper sulfate powder or fine sand is evenly sprinkled on the coating, and then water is dripped onto its surface using a dropper. It can be seen from the figure that the anhydrous copper sulfate and fine sand on the coating can be taken away by the water droplets dripped from the dropper, leaving a clean and clear water droplet rolling channel on the coating surface, which indicates that the dynamic recycling super-slippery liquid anti-icing coating has good self-cleaning properties after the surface super-slippery liquid is recycled into the coating under high temperature environment.

[0232] (2) Coating wear resistance test

[0233] use Figure 3 The device performs quantitative wear resistance test on the coating prepared in Example 1 of the present invention: 1000-mesh sandpaper is fixed on a flat table to fit the prepared dynamically recoverable super-slip liquid anti-icing coating to the sandpaper, and a 200g weight (pressure is 2.5kPa) is placed on the coating. A linear motion device is used to make the coating reciprocate at a uniform speed on the sandpaper, with a movement length of 20cm and a reciprocating movement of 40cm as a movement cycle. The relationship between the coating contact angle WCA and rolling angle WRA as they change with the wear distance during the whole process is recorded.

[0234] like Figure 4 As shown, Figure 4 The wear resistance of the coating prepared according to Example 1 was recorded. After 50 frictions, no obvious damage was found on the coating surface. Although the contact angle became lower and the rolling angle gradually increased with the increase in the number of frictions, there was no obvious change, indicating that the dynamic recovery super-slip liquid anti-icing coating has excellent wear resistance.

[0235] (3) Super-slippery liquid dynamic recovery test

[0236] Through digital microscope observation, liquid paraffin is stored in diatomaceous earth and forms a composite coating with a soft silicone rubber substrate, such as Figure 5As shown in Figure b, when the temperature is below -10°C, the droplets gradually converge and form a very thin oil film on the coating surface. When the cold stage temperature is set to 20°C, it is observed that the oil film on the coating surface will gradually spread as the temperature rises. When the critical temperature of -2°C is reached, the liquid paraffin begins to be absorbed into the diatomaceous earth in the coating. When the temperature reaches 6°C, the droplets on the coating surface are almost completely absorbed by the diatomaceous earth. After 30 cycles of cooling and heating, the coating still has good dynamic response characteristics, and the oil film can be stably formed and absorbed each time. Figure 5 a and c are the absorption and release processes of liquid paraffin on the coating surface observed through an optical microscope. It can be seen more clearly that the liquid paraffin is gradually absorbed and released from the micropores on the coating surface as the temperature changes.

[0237] (4) Coating anti-icing test

[0238] The ice adhesion of the coating was measured using a self-made multifunctional test bench. After adjusting the temperature and humidity in the climate chamber to -20°C and 30% RH, the tested sample was placed on a semiconductor refrigeration table, and the temperature of the refrigeration table was controlled to -20°C. 3ml of water was injected into the ice box mold (25mm×40mm) on the surface of the coating to freeze nine points evenly on the surface of the coating, and the surface temperature of the sample was observed by an infrared imager. After 2 hours, when the ice layer was completely frozen, the dynamometer was used to push the icicle at a uniform speed, and the maximum force during each push was recorded. The ice adhesion strength of the coating was calculated using the following formula:

[0239] P=F / (A×10 3 )

[0240] (P-ice adhesion strength, unit: KPa; F-ice adhesion force, unit: N; A-contact area, unit: m 2 )

[0241] After removing the maximum and minimum extreme values ​​of the data of the 9 points on the coating surface, the data of the remaining 7 points are averaged to obtain the ice adhesion strength of the point. In order to explore the anti-icing performance and long-term anti-icing performance of the dynamically recovered super-slippery liquid coating provided by Examples 1-8 and Comparative Examples 1-8, the above method was used to test, and the results are shown in Table 1 below. The ice adhesion of the blank substrate was measured in advance to be about 200 kPa.

[0242] Table 1 Anti-icing performance and long-term anti-icing performance of coatings provided by Examples 1-8 and Comparative Examples 1-8

[0243]

[0244] As can be seen from Table 1, through the comparison of different data in the embodiments and comparative examples, it can be seen that for the dynamically recoverable super-lubricant liquid anti-icing coating involved in the present invention, its ice adhesion reduction mainly comes from the super-lubricant liquid paraffin. Therefore, when the anti-icing liquid is replaced with ethylene glycol, the effect is weakened. Its long-term anti-icing ability comes from the fact that the porous microparticles can absorb and store a large amount of super-lubricant liquid more efficiently, and the particle size of the porous particles will affect the absorption and release capacity of the super-lubricant component. On the other hand, it comes from the appropriate super-lubricant component content brought by the appropriate coating thickness and the appropriate thermal expansion and contraction ability of the elastic substrate. The thermal expansion and contraction ability changes with the change of the Ecoflex0030 content in the substrate. Too high means that its thermal expansion and contraction ability is stronger, and more super-lubricant liquid is squeezed out when the temperature drops, thereby affecting its long-term anti-icing ability. In addition, it is also related to the choice of silicone rubber solvent. Butyl acetate with a boiling point that is too high is difficult to form a similar super-lubricant on the surface during drying and curing. Figure 1 The pores of the coating will affect the release of the super-slippery liquid to the coating surface, which will eventually seriously affect the deicing ability of the coating. In addition, if the content of the super-slippery component is too high, it will eventually affect the curing of the coating, making it difficult to cure the coating, and easily lead to uneven curing such as blistering, which will eventually seriously affect the deicing ability of the coating.

[0245] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A dynamic recovery super-slip liquid anti-icing coating, characterized in that: The dynamically recoverable super-lubricant liquid anti-icing coating includes a polymer substrate and a super-lubricant component formed in the polymer substrate; the polymer substrate includes soft elastic silicone rubber; the soft elastic silicone rubber includes Ecoflex0030 and Dow Corning 184; the super-lubricant component is composed of super-lubricant liquid and porous microparticles storing the super-lubricant liquid.

2. The dynamic recovery super-slippery liquid anti-icing coating according to claim 1, characterized in that: The thickness of the dynamic recovery super-slip liquid anti-icing coating is 1 mm to 3 mm; the particle size of the porous microparticles is 5 μm to 20 μm.

3. The dynamic recovery super-slippery liquid anti-icing coating according to claim 1, characterized in that: The mass ratio of the polymer substrate to the super-slip component is 2:(0.5-2); the mass ratio of Ecoflex 0030 to Dow Corning 184 in the polymer substrate is (1-6):

1.

4. The dynamic recovery super-slippery liquid anti-icing coating according to claim 1, characterized in that: The porous microparticles are one or more of zeolite, hollow silica microspheres, diatomaceous earth, and carbon black; the super-lubricating liquid is one or more of ethylene glycol, glycerol, liquid paraffin, and n-hexadecane.

5. A method for preparing a dynamically recovered super-slippery liquid anti-icing coating, characterized in that: The steps include: (1) Ecoflex 0030 and Dow Corning 184 are uniformly mixed in a solvent, and the corresponding curing agent is added and cured to form a polymer substrate; (2) Saturated adsorption of super-lubricant liquid inside porous microparticles to form super-lubricant components; (3) The super-lubricant component and the pre-curing polymer base solution are uniformly mixed to obtain the dynamically recoverable super-lubricant liquid anti-icing coating after curing.

6. The method for preparing a dynamically recoverable super-slippery liquid anti-icing coating according to claim 5, characterized in that: The solvent in step (1) is one or more of ethyl acetate, butyl acetate, and tetrahydrofuran; in the polymer solution, the concentration of Ecoflex0030 is 70wt% to 90wt%, and the concentration of Dow Corning 184 is 40wt% to 90wt%; the uniform mixing is carried out at 25°C to 30°C and magnetic stirring at 800rpm to 1000rpm for 0.5h to 1.5h.

7. The method for preparing a dynamically recoverable super-slippery liquid anti-icing coating according to claim 5, characterized in that: The porous microparticles in step (2) are subjected to hydrophobic and lipophilic modification treatment, that is, the porous microparticles are dispersed in a mixed solution of anhydrous ethanol and a perfluorosilane coupling agent, ultrasonically dispersed, and then magnetically stirred to obtain a sol, which is then washed and dried to obtain a sol; The porous microparticles are one or more of zeolite, hollow silica microspheres, diatomaceous earth, and carbon black; the perfluorosilane coupling agent is one or more of perfluorooctyltriethoxysilane and tridecafluorooctyltriethoxysilane; The mass ratio of the ethanol to the perfluorosilane coupling agent is (70-90):1; In the mixed solution, the concentration of the porous microparticles is 7wt% to 10wt%; The ultrasonic dispersion is performed for 0.5 to 1.5 hours, and the magnetic stirring is performed at a speed of 800 rpm to 1000 rpm for 0.5 to 1 hour.

8. The method for preparing a dynamically recoverable super-slippery liquid anti-icing coating according to claim 5, characterized in that: The porous microparticles are loaded with a super-lubricant liquid, comprising the following steps: mixing the porous microparticles and the super-lubricant liquid, and then magnetically stirring the mixture under vacuum to obtain the super-lubricant component after uniform mixing; The super-lubricant liquid includes one or more of ethylene glycol, propylene glycol, liquid paraffin, and n-hexadecane; the mass ratio of the porous microparticles to the super-lubricant liquid is 1:(0.5-1.5); the duration of the magnetic stirring is 0.5h-1.5h; the rotation speed of the magnetic stirring is 800rpm-1000rpm.

9. The method for preparing a dynamically recoverable super-slippery liquid anti-icing coating according to claim 5, characterized in that: Step (3) specifically includes the following process: fully mixing the polymer base solution and the super-slip component, uniformly coating the mixed solution on the desired surface using a coating machine with adjustable thickness, and drying and curing in an oven to obtain a dynamically recoverable super-slip liquid anti-icing coating.

10. The method for preparing a dynamically recoverable super-slippery liquid anti-icing coating according to claim 9, characterized in that: Adding a curing agent to the polymer base solution, the mass of the corresponding curing agent of Ecoflex 0030 and Dow Corning 184 is equal to the mass of the resin used; After adding the curing agent, the super-slip component is added to the polymer solution and magnetic stirring is performed; the duration of the magnetic stirring is 0.2 to 1 hour; the speed of the magnetic stirring is 800 rpm to 1000 rpm; The thickness of the coating machine is adjusted to 1 mm to 3 mm; the drying and curing temperature is 50° C. to 70° C.; and the drying and curing time is 1.5 h to 3 h.

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