Fluorine-free silicon-containing anti-icing coating based on organic tellurium compound regulation and preparation method thereof

Abstract

The present application relates to the field of functional polymer materials and surface engineering technology, and particularly relates to a fluorine-free silicon-containing anti-icing coating preparation method based on organic tellurium compound regulation, which comprises the following steps: mixing a silicon-containing monomer and a polar monomer, stirring uniformly at room temperature to form a precursor solution; adding an organic azo compound and an organic tellurium compound to the precursor solution under an inert atmosphere, and then performing reaction, purification and drying to obtain a silicon-containing copolymer; dissolving the obtained silicon-containing copolymer in a solvent, adding a crosslinking agent to prepare a coating solution; uniformly coating the coating solution on the surface of a substrate, and drying to form a fluorine-free silicon-containing anti-icing coating. The present application also provides the fluorine-free silicon-containing anti-icing coating obtained by the method, which has a surface water contact angle greater than 100° and an ice adhesion strength less than 50 kPa. The present application has a simple process, green and environmentally-friendly components, and the prepared fluorine-free silicon-containing anti-icing coating material is suitable for icing protection under complex environments such as wind power blades, aerospace components and power lines.

Description

Technical Field

[0001] This invention relates to the field of functional polymer materials and surface engineering technology. Background Technology

[0002] Icing is a long-standing problem in engineering applications such as aerospace, power transmission, and transportation in cold regions, seriously threatening equipment operation and personal safety. Traditional active de-icing methods (such as electrothermal de-icing, pneumatic de-icing, or spraying antifreeze) are effective but have drawbacks such as high energy consumption, complex equipment, and high maintenance costs. Therefore, low-energy-consumption, long-lasting and stable passive anti-icing coatings have become a research focus.

[0003] Existing passive anti-icing coatings mainly rely on two approaches: one is to construct superhydrophobic micro / nano structures to reduce the interfacial bonding of ice using the air pocket effect; the other is to introduce lubricants or greases to form a liquid lubricating layer to reduce ice adhesion. The former often fails after mechanical wear or contamination, resulting in insufficient durability; the latter has a limited lifespan due to lubricant dissipation. Meanwhile, many studies have used fluoropolymers to reduce surface energy, but the environmental durability and potential bioaccumulation risks of fluorinated materials severely limit their application under policies and regulations.

[0004] To avoid using fluorinated monomers, some researchers have attempted to synthesize silicon-containing copolymers through controlled / living radical polymerization, utilizing silicon-oxygen bonds and organosilicon side groups to reduce surface energy. However, these methods generally suffer from problems such as insufficient monomer conversion, wide molecular weight distribution, and uneven cross-linking structure, resulting in coatings with large fluctuations in thermal stability, mechanical strength, and anti-icing performance, as well as poor durability, making it difficult to meet the requirements of harsh service environments. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fluorine-free silicon-containing anti-icing coating and its preparation method based on organotelluric compound-mediated free radical polymerization (TERP) to prepare polymers with high structural controllability, avoid the use of fluorinated components, and improve the thermal stability, mechanical properties and stability of the coating.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds, comprising the following steps:

[0007] Step 1: Mix the silicon-containing monomer, polar monomer and solvent, and stir evenly at room temperature to form a precursor solution;

[0008] The molar ratio of silicon-containing monomers to polar monomers is 1:1 to 10:1, and both silicon-containing monomers and polar monomers are fluorine-free monomers.

[0009] Step 2: Under an inert atmosphere, add the organic azo compound and the organic tellurium compound to the precursor solution, and heat and stir at 60-80°C for 5-7 hours to obtain the silicon-containing copolymer.

[0010] The number-average molecular weight of the silicon-containing copolymers is 15–500 kDa, and the molecular weight distribution is 1.1–1.5.

[0011] Step 3: After dissolving the silicon-containing copolymer in a solvent, add a crosslinking agent to obtain the coating solution;

[0012] The amount of crosslinking agent added is 0.1% to 10% of the mass of the silicone copolymer;

[0013] Step 4: Apply the coating liquid evenly to the surface of the substrate and dry it at 40-80℃ for 12-24 hours to form a fluorine-free silicon-containing anti-icing coating on the surface of the substrate.

[0014] Furthermore, in step one, the silicon-containing monomer is one or more of the following: methacryloxypropylmethyldimethoxysilane, methacryloxypropyltris(trimethylsiloxane)silane, 2-allyltrimethylsilane, methacryloxypropyltriethoxysilane, trimethylsilyl methacrylate, and 3-methacryloxypropylbis(trimethylsiloxane).

[0015] The polar monomer is one or more of hydroxyethyl methacrylate, hydroxybutyl methacrylate, glycidyl methacrylate, and methyl methacrylate.

[0016] The solvent is tetrahydrofuran, propylene glycol methyl ether, chloroform, propylene glycol dimethyl ether, propylene glycol butyl ether, toluene, N , N One or more of dimethylformamide.

[0017] Furthermore, in step two, the general structural formula of the organic tellurium compound is R. 1 –Te–R 2 ,in:

[0018] R 1 For C6-C 12 An ester derivative of any one of aryl, C1-C6 alkoxy, carboxyl, cyano, or C1-C6 straight-chain or branched alkyl groups;

[0019] R 2 C1-C6 alkyl, C6-C 12 Any one of aryl and substituted aryl.

[0020] Furthermore, the R mentioned above 1It is any one of aryl, ester, carboxyl, cyano, and C1-C6 straight-chain or branched alkyl groups;

[0021] Wherein, the aryl group is phenyl or p-methoxyphenyl;

[0022] The R mentioned 2 It is any one of methyl, ethyl, phenyl, and p-methoxyphenyl.

[0023] Furthermore, in step two, the organic azo compound is any one of azobisisobutyronitrile, azobisisoheptanenitrile, azobisisovalerate, and azobiscyclohexylformitrile.

[0024] Furthermore, the crosslinking agent mentioned in step three is a multifunctional compound containing two or more reactive functional groups, which are any one of hydroxyl, amino, and isocyanate groups.

[0025] The solvent is tetrahydrofuran, propylene glycol methyl ether, chloroform, propylene glycol dimethyl ether, propylene glycol butyl ether, toluene, N , N One or more of dimethylformamide.

[0026] Furthermore, the polyfunctional compound is specifically a polyol, polyamine, or polyisocyanate compound;

[0027] Among them, the polyol is ethylene glycol or trimethylolpropane; the polyamine is ethylenediamine or diethylenetriamine; and the polyisocyanate compound is toluene diisocyanate, diphenylmethane diisocyanate or hexamethylene diisocyanate.

[0028] Furthermore, the coating liquid described in step four is applied to the surface of the substrate by brushing, spraying, or roller coating, followed by drying in a blower drying oven.

[0029] Furthermore, the substrate mentioned in step four is glass, aluminum alloy, or tinplate.

[0030] The present invention also provides a fluorine-free silicon-containing anti-icing coating obtained by the above-described method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds. The fluorine-free silicon-containing anti-icing coating does not contain fluorine, has a surface water contact angle greater than 100°, and exhibits an ice adhesion strength of less than 50 kPa under conventional ice adhesion strength test conditions.

[0031] The beneficial effects of this invention are as follows: This invention provides a method for preparing a fluorine-free silicon-containing anti-icing coating based on organotellurium compounds. This method involves copolymerizing one or more silicon-containing polar monomers with other polar monomers under the action of an organotellurium chain transfer agent to synthesize a silicon-containing polymer with controllable molecular weight and narrow distribution. After dispersion with a good solvent, the polymer is coated onto the surface of glass, metal, or other substrates to form a stable hydrophobic (anti-icing) coating. This invention features a simple process, environmentally friendly components, strong adhesion to the substrate, significantly improved thermal stability and mechanical properties of the coating, and ensures low surface energy and excellent anti-icing effect during long-term service. It is suitable for icing protection in complex environments such as wind turbine blades, aerospace components, and power lines. Attached Figure Description

[0032] Figure 1 The gel permeation chromatography (GPC) elution curve of the silicon-containing copolymer described in this invention;

[0033] Figure 2 Thermogravimetric analysis (TGA) curve of the silicon-containing copolymer described in this invention;

[0034] Figure 3 Stress-strain curve of the fluorine-free silicon-containing anti-icing coating prepared in this invention;

[0035] Figure 4 Comparison of ice adhesion strength between fluorine-free silicon-containing anti-icing coatings prepared with and without organic tellurium compounds. Detailed Implementation

[0036] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0037] To achieve the above objectives, the present invention provides the following specific embodiments:

[0038] Example 1: As Figure 1 , Figure 2 As shown, a method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds includes the following steps:

[0039] Step 1: Mix the silicon-containing monomer, polar monomer and solvent, and stir evenly at room temperature to form a precursor solution;

[0040] The molar ratio of silicon-containing monomers to polar monomers is 1:1 to 10:1.

[0041] The silicon-containing monomer is one or more of the following: methacryloyloxypropylmethyldimethoxysilane, methacryloyloxypropyltris(trimethylsiloxane), 2-allyltrimethylsilane, methacryloyloxypropyltriethoxysilane, trimethylsilyl methacrylate, and 3-methacryloyloxypropylbis(trimethylsiloxane).

[0042] The polar monomer is one or more of hydroxyethyl methacrylate, hydroxybutyl methacrylate, glycidyl methacrylate, and methyl methacrylate.

[0043] The solvents are tetrahydrofuran, propylene glycol methyl ether, chloroform, propylene glycol dimethyl ether, propylene glycol butyl ether, and toluene. N , N One or more of dimethylformamide.

[0044] Step 2: Under an inert atmosphere, add the organic azo compound and the organic tellurium compound to the precursor solution, and heat and stir at 60-80°C for 5-7 hours to obtain the silicon-containing copolymer.

[0045] The number-average molecular weight of the silicon-containing copolymers is 15–500 kDa, and the molecular weight distribution is 1.1–1.5.

[0046] Among them, the organic azo compounds are any one of azobisisobutyronitrile, azobisisoheptanenitrile, azobisisovalerate, and azobiscyclohexylformitrile;

[0047] The general structural formula of organotelluric compounds is R 1 –Te–R 2 ,in:

[0048] R 1 For C6-C 12 An ester derivative of any one of aryl, C1-C6 alkoxy, carboxyl, cyano, or C1-C6 straight-chain or branched alkyl groups;

[0049] R 2 C1-C6 alkyl, C6-C 12 Any one of aryl and substituted aryl.

[0050] like Figure 1 As shown, the gel permeation chromatography (GPC) elution curves of the silicon-containing copolymers are presented. The red line in the figure represents the elution curve of the polymer prepared without the use of organotelluric compounds, while the black line represents the elution curve of the silicon-containing copolymer prepared using organotelluric compounds in this invention. It can be seen from the figure that the silicon-containing copolymers prepared using organotelluric compounds have a narrow molecular weight distribution and good molecular weight control.

[0051] like Figure 2 As shown, the thermogravimetric analysis (TGA) curves of the silicon-containing copolymer are presented. The red line in the figure represents the TGA curve of the polymer prepared without the use of the organotelluric compound, while the black line represents the TGA curve of the polymer prepared using the organotelluric compound in this invention. It can be seen from the figure that the polymer prepared using the organotelluric compound has significantly improved thermal stability.

[0052] Step 3: Dissolve the silicon-containing copolymer in a solvent and then add a crosslinking agent to obtain a coating solution;

[0053] The amount of crosslinking agent added is 0.1% to 10% of the mass of the silicone copolymer;

[0054] The crosslinking agent is a multifunctional compound containing two or more reactive functional groups, which are any one of hydroxyl, amino, or isocyanate groups.

[0055] The solvents are tetrahydrofuran, propylene glycol methyl ether, chloroform, propylene glycol dimethyl ether, propylene glycol butyl ether, and toluene. N , N One or more of dimethylformamide.

[0056] Step 4: Apply the coating liquid evenly to the surface of the substrate and dry it at 40-80℃ for 12-24 hours to form a fluorine-free silicon-containing anti-icing coating on the surface of the substrate.

[0057] The substrate is glass or aluminum alloy.

[0058] Example 2: Same as Example 1, except that:

[0059] The general structural formula of the organic tellurium compound in step two is R. 1 –Te–R 2 ,

[0060] Among them, R 1 It is any one of aryl, ester, carboxyl, cyano, and C1-C6 straight-chain or branched alkyl groups;

[0061] Wherein, the aryl group is phenyl or p-methoxyphenyl;

[0062] The R mentioned 2 It is any one of methyl, ethyl, phenyl, and p-methoxyphenyl.

[0063] The polyfunctional compounds in step three are specifically polyols, polyamines, or polyisocyanates.

[0064] Among them, the polyol is ethylene glycol or trimethylolpropane; the polyamine is ethylenediamine or diethylenetriamine; and the polyisocyanate compound is toluene diisocyanate, diphenylmethane diisocyanate or hexamethylene diisocyanate.

[0065] The coating liquid in step four is applied to the surface of the substrate by brushing, spraying or roller coating, followed by drying in a blower drying oven, which forms a fluorine-free silicon-containing anti-icing coating on the surface of the substrate.

[0066] The base material is tinplate.

[0067] Example 3: As Figure 3 , Figure 4 As shown, the present invention also provides a fluorine-free silicon-containing anti-icing coating obtained by the method for preparing a fluorine-free silicon-containing anti-icing coating based on the organic tellurium compound as described in Example 1 or Example 2. The fluorine-free silicon-containing anti-icing coating does not contain fluorine, has a surface water contact angle greater than 100°, and has an ice adhesion strength of less than 50 kPa under conventional ice adhesion strength test conditions. It is suitable for the surface of wind turbine blades, aircraft wings or high-voltage transmission lines.

[0068] like Figure 3 The figure shows the stress-strain curves of the fluorine-free silicon-containing anti-icing coating prepared according to the present invention. The red line in the figure represents the stress-strain curve of the anti-icing coating prepared without the use of organotellurium compounds, and the black line represents the stress-strain curve of the fluorine-free silicon-containing anti-icing coating prepared by adding a crosslinking agent to the silicon-containing copolymer prepared using organotellurium compounds according to the present invention. It can be seen from the figure that the mechanical properties of the fluorine-free silicon-containing anti-icing coating prepared according to the present invention are significantly higher than those of the anti-icing coating prepared without the use of organotellurium compounds.

[0069] like Figure 4 The figure shows a comparison of the ice adhesion strength of fluorine-free silicon-containing anti-icing coatings prepared with and without organic tellurium compounds. Green represents the ice adhesion strength of the anti-icing coating prepared without organic tellurium compounds, and light orange represents the ice adhesion strength of the fluorine-free silicon-containing anti-icing coating prepared using the silicon-containing copolymer prepared with organic tellurium compounds and then adding a crosslinking agent. As can be seen from the figure, the ice adhesion strength of the fluorine-free silicon-containing anti-icing coating prepared by this invention is significantly reduced.

[0070] To further illustrate the technical solution and effects of the present invention, the following preparation experimental examples are provided:

[0071] Preparation Example 1: 0.4 g (1.4 mmol) of methacryloyloxypropyltriethoxysilane and 0.1 g (0.8 mmol) of hydroxyethyl methacrylate were dissolved in 20 mL of tetrahydrofuran and stirred at room temperature for 30 minutes to obtain a precursor solution. 0.05 g of azobisisobutyronitrile (AIBN) and 0.2 g of an organotelluric acid compound were added to the precursor solution and the mixture was heated in an oil bath at 70 °C for 6 hours to obtain a silicon-containing copolymer.

[0072] 0.475 g of the silicon-containing copolymer was dissolved in 10 mL of propylene glycol butyl ether, and then 0.025 g of toluene diisocyanate was added to prepare a coating solution with a solid content of 5 wt%. The coating solution was uniformly sprayed onto an aluminum alloy plate and dried at 150 °C for 40 minutes to obtain a fluorine-free silicon-containing anti-icing coating with a water contact angle of 103.5° and an ice adhesion strength of 32.3 kPa.

[0073] Preparation Example 2: 5.0 g (11.8 mmol) of methacryloyloxypropyltris(trimethylsiloxane)silane and 1.0 g (7.0 mmol) of glycidyl methacrylate were dissolved in 25 mL of propylene glycol dimethyl ether (DPM) and stirred at room temperature for 30 minutes to obtain a precursor solution. 0.06 g of azobisisobutyronitrile (AIBN) and 0.2 g of an organotelluric acid compound were added to the precursor solution, and the mixture was heated in an oil bath at 70 °C for 6 h to obtain a silicon-containing copolymer.

[0074] Dissolve 0.485 g of the silicon-containing copolymer in 10 mL N , N After adding dimethylformamide (DMF), 0.015 g of diethylenetriamine was added to prepare a coating solution with a solid content of 4.8 wt%. The coating solution was sprayed onto the glass surface and dried at 150 °C for 40 minutes to obtain a fluorine-free silicon-containing anti-icing coating with a water contact angle of 107.2° and an ice adhesion strength of 38.5 kPa.

[0075] Preparation Example 3: Same as Preparation Example 1, except that no crosslinking agent was used. Specifically, 0.4 g (1.4 mmol) of methacryloyloxypropyltriethoxysilane and 0.1 g (0.8 mmol) of hydroxyethyl methacrylate were dissolved in 20 mL of tetrahydrofuran and stirred at room temperature for 30 minutes to obtain a precursor solution. 0.05 g of azobisisobutyronitrile (AIBN) and 0.2 g of an organotelluric acid compound were added to the precursor solution, and the mixture was heated in an oil bath at 70 °C for 6 hours to obtain a silicon-containing copolymer.

[0076] 0.5 g of the silicon-containing copolymer was dissolved in 10 mL of propylene glycol methyl ether to prepare a coating solution with a solid content of 5 wt%. The coating solution was uniformly sprayed onto an aluminum alloy plate and dried in a 60℃ forced-air drying oven for 30 minutes. The water contact angle of the fluorine-free silicon-containing anti-icing coating was measured to be 102.8° and the ice adhesion strength was 49.7 kPa.

[0077] Preparation Example 4: Same as Preparation Example 1, except that no organic tellurium compound was used. Specifically, 0.4 g (1.4 mmol) of methacryloyloxypropyltriethoxysilane and 0.1 g (0.8 mmol) of hydroxyethyl methacrylate were dissolved in 20 mL of tetrahydrofuran and stirred at room temperature for 30 minutes to obtain a precursor solution. 0.05 g of azobisisobutyronitrile (AIBN) was added to the precursor solution and the mixture was heated in an oil bath at 70 °C for 6 hours to obtain a silicon-containing copolymer.

[0078] The obtained silicon-containing copolymers showed a wide molecular weight distribution as determined by GPC. Ð>2.5), 0.475 g of the silicon-containing copolymer was dissolved in 10 mL of propylene glycol butyl ether, and then 0.025 g of toluene diisocyanate was added to prepare a coating solution with a solid content of 5 wt%. The coating solution was uniformly sprayed onto an aluminum alloy plate and dried at 150℃ for 40 minutes. The resulting coating surface was uneven, with obvious edge shrinkage. The water contact angle of the coating was 94.2°, the ice adhesion strength was 75.6 kPa, the mechanical adhesion was poor, and it was easy to peel off.

[0079] Preparation Experiment 5: Same as Preparation Experiment 1, except that the monomer ratio deviates from the preferred range. Specifically, 1.0 g (2.4 mmol) of methacryloyloxypropyltris(trimethylsiloxane)silane and 2.0 g (14.1 mmol) of hydroxyethyl methacrylate were dissolved in 20 mL of tetrahydrofuran, and 0.05 g of azobisisobutyronitrile (AIBN) and 0.2 g of organotelluric acid compound were added. The mixture was heated at 70 °C for 6 hours to obtain a silicon-containing copolymer.

[0080] 0.475 g of a silicon-containing copolymer was dissolved in 10 mL of propylene glycol butyl ether, and then 0.025 g of toluene diisocyanate was added to prepare a coating solution with a solid content of 5 wt%. The coating solution was uniformly sprayed onto an aluminum alloy plate and dried at 150 °C for 40 minutes. The resulting coating had a water contact angle of 89.3° and an ice adhesion strength of 88.5 kPa. The coating surface was sticky, indicating that the high content of polar monomers led to increased hydrophilicity and decreased hydrophobicity, resulting in a significant decrease in anti-icing performance.

[0081] The comparison of the results of the five preparation experiments above is shown in Table 1. Table 1 shows the influence of different monomer combinations and process conditions on the coating performance:

[0082] Table 1

[0083]

[0084] The performance testing process of the fluorine-free silicon-containing anti-icing coating obtained by the method for preparing fluorine-free silicon-containing anti-icing coating based on organotelluric compound regulation provided by the present invention is as follows:

[0085] The water contact angle of the fluorine-free silicon-containing anti-icing coating was measured using an OCA15 contact angle meter. The test temperature was 25±1℃ and the relative humidity was 50±5%. At least three locations were measured for each sample, and the average value was taken as the final water contact angle. The droplet volume used was approximately 5 μL. The test substrate was pre-cleaned and dried.

[0086] The ice adhesion strength test was conducted using a low-temperature pull-off method. Specifically, in an environment of -20°C, the sample surface was frozen into a standard ice column (cross-sectional area of ​​1 cm × 1 cm). A push-pull force gauge (accuracy 0.01 N) was used to slowly apply the ice in the shear direction, and the maximum desorption force was recorded. The ice adhesion strength was calculated based on the contact area, with the unit being kPa. Each group of samples was repeated 3 times, and the average value was taken.

[0087] The molecular weight and molecular weight distribution of the silicon-containing copolymer provided by the present invention were characterized by gel permeation chromatography (GPC) using tetrahydrofuran (THF) as the mobile phase, column temperature of 35°C, flow rate of 1.0 mL / min, and a differential refractive index detector (RID). Polystyrene standards were used for calibration.

[0088] The thermal stability of silicon-containing copolymers is characterized by thermogravimetric analysis (TGA). The decomposition temperature is determined by observing the temperature point at which the polymer mass rapidly decreases, and the decomposition temperature reflects the thermal stability of the polymer.

[0089] The mechanical properties of the fluorine-free silicone anti-icing coating were measured using an electronic tensile testing machine. Tensile strength was measured according to the national standard GB / T 528-2009. All samples were made into dumbbell shape, and the tensile rate was 100 mm / min at room temperature, with a test length of 15.0 ± 0.5 mm.

[0090] This demonstrates that the fluorine-free silicon-containing anti-icing coating prepared by the method of this invention is suitable for scenarios with high requirements for icing suppression performance and material environmental friendliness in fields such as wind energy, aviation, and power.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds, characterized in that, Includes the following steps: Step 1: Mix the silicon-containing monomer, polar monomer and solvent, and stir evenly at room temperature to form a precursor solution; The molar ratio of silicon-containing monomers to polar monomers is 1:1 to 10:1, and both silicon-containing monomers and polar monomers are fluorine-free monomers. The silicon-containing monomer is one or more of the following: methacryloyloxypropylmethyldimethoxysilane, methacryloyloxypropyltris(trimethylsiloxane)silane, 2-allyltrimethylsilane, methacryloyloxypropyltriethoxysilane, trimethylsilyl methacrylate, and 3-methacryloyloxypropylbis(trimethylsiloxane). The polar monomer is one or more of hydroxyethyl methacrylate, hydroxybutyl methacrylate, glycidyl methacrylate, and methyl methacrylate. Step 2: Under an inert atmosphere, add the organic azo compound and the organic tellurium compound to the precursor solution, and heat and stir at 60-80°C for 5-7 hours to obtain the silicon-containing copolymer. The number-average molecular weight of the silicon-containing copolymers is 15–500 kDa, and the molecular weight distribution is 1.1–1.

5. Step 3: After dissolving the silicon-containing copolymer in a solvent, add a crosslinking agent to obtain the coating solution; The amount of crosslinking agent added is 0.1% to 10% of the mass of the silicone copolymer; Step 4: Apply the coating liquid evenly to the surface of the substrate and dry it at 40-80℃ for 12-24 hours to form a fluorine-free silicon-containing anti-icing coating on the surface of the substrate. The fluorine-free silicon-containing anti-icing coating contains no fluorine, has a surface water contact angle greater than 100°, and under conventional ice adhesion strength test conditions, its ice adhesion strength is less than 50 kPa.

2. The method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds as described in claim 1, characterized in that, In step two, the general structural formula of the organic tellurium compound is R. 1 –Te–R 2 ,in: R 1 For C6-C 12 An ester derivative of any one of aryl, C1-C6 alkoxy, carboxyl, cyano, or C1-C6 straight-chain or branched alkyl groups; R 2 C1-C6 alkyl, C6-C 12 Any one of aryl and substituted aryl.

3. The method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds as described in claim 2, characterized in that, The R mentioned 1 It is any one of ethyl, phenyl, methyl isobutyrate, carboxyl, cyano, and methyl; The R mentioned 2 It is any one of methyl, ethyl, phenyl, and p-methoxyphenyl.

4. The method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds as described in claim 1, characterized in that, In step two, the organic azo compound is any one of azobisisobutyronitrile, azobisisoheptanenitrile, azobisisopentanitrile, and azobiscyclohexylformitrile.

5. The method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds as described in claim 1, characterized in that, The crosslinking agent mentioned in step three is a multifunctional compound containing two or more reactive functional groups, which are any one of hydroxyl, amino, and isocyanate groups. The solvent is tetrahydrofuran, propylene glycol methyl ether, chloroform, propylene glycol dimethyl ether, propylene glycol butyl ether, toluene, N , N One or more of dimethylformamide.

6. The method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds as described in claim 5, characterized in that, The crosslinking agent is any one of polyols, polyamines, and polyisocyanates.

7. The method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds as described in claim 1, characterized in that, The coating liquid described in step four is applied to the surface of the substrate by brushing, spraying, or roller coating, followed by drying in a blower drying oven.

8. The method for preparing a fluorine-free silicon-containing anti-icing coating based on organotelluric compounds as described in claim 1, characterized in that, The substrate mentioned in step four is glass, aluminum alloy, or tinplate.

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