High-durability isooctyl / acryloxy mixed siloxane modified PMMA super-hydrophobic anti-icing coating and preparation method thereof

Abstract

This invention relates to the field of hydrophobic anti-icing coating technology, specifically to a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating and its preparation method, comprising the following steps: S1. Mixing a silane modifier, anhydrous ethanol, and deionized water, adjusting the pH to obtain a cocondensate; S2. Mixing the cocondensate, functional monomer modifier, and solvent, then adding p-hydroxyanisole, precipitating, filtering, and drying to obtain a modified PMMA prepolymer resin; S3. Mixing the modified PMMA prepolymer resin, methyl methacrylate, and solvent, purging with nitrogen to remove oxygen, then adding nano-silica, a substrate wetting agent, and a dispersant, dispersing, grinding, and sieving, and finally adding benzoyl peroxide to obtain the modified PMMA superhydrophobic anti-icing coating. This invention effectively avoids phase separation through chemical grafting, ensuring that hydrophobic segments are uniformly distributed on the coating surface and within the coating, significantly improving the hydrophobic stability and durability of the coating, breaking through the technical bottleneck of traditional PMMA coatings where hydrophobicity, hardness, and durability are difficult to balance.

Description

Technical Field

[0001] This invention relates to the field of hydrophobic and anti-icing coating technology, specifically to a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic and anti-icing coating and its preparation method. Background Technology

[0002] Traditional acrylic coatings (such as polymethyl methacrylate, PMMA) are widely used in construction, automotive, marine engineering, and energy equipment due to their excellent transparency, weather resistance, and film-forming properties. However, conventional PMMA coatings have the following technical drawbacks: (1) Insufficient weather resistance: Traditional PMMA resin is prone to chalking and yellowing under long-term ultraviolet radiation and humid and hot environment, resulting in a decrease in coating gloss and limited service life.

[0003] (2) Poor hydrophobicity: Ordinary PMMA coatings have high surface energy and a contact angle that is usually less than 90°. They are difficult to achieve special functions such as self-cleaning and anti-icing. Especially in applications such as aerospace, wind turbine blades and power transmission lines that require anti-icing and de-icing, the anti-icing effect of ordinary coatings is difficult to meet the requirements.

[0004] (3) Insufficient wear resistance and hardness: Existing hydrophobic modification methods (such as adding silicone oil or low surface energy additives) can improve hydrophobicity to a certain extent, but often lead to a decrease in coating hardness (≤1H), poor wear resistance, and easy scratching damage to the coating, resulting in loss of hydrophobic function.

[0005] (4) Hydrophobic modification methods have compatibility issues: conventional methods of introducing hydrophobic components (such as long-chain alkyl silanes and fluorine-containing additives) through physical blending are prone to phase separation, resulting in uneven hydrophobic properties and poor durability of the coating surface.

[0006] Therefore, developing a PMMA-based coating that combines high hardness, high wear resistance, excellent hydrophobic and anti-icing properties, and good durability is of significant application value. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating and its preparation method.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A method for preparing a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating includes the following steps: S1. By weight, mix 15-20 parts of silane modifier, 5-20 parts of anhydrous ethanol and 1-3 parts of deionized water, and adjust the pH to 3-4 using dilute hydrochloric acid to obtain a cocondensate. S2. The cocondensate obtained in step S1, 70-90 parts of functional monomer modifier and 5-14 parts of solvent are mixed in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube. Nitrogen gas is purged for 25-30 minutes and the temperature is raised to 75-80℃. Then 0.5-1 parts of p-hydroxyanisole are added. After reacting for 6-8 hours, excess anhydrous ethanol is added to precipitate the product. After filtration and drying, the modified PMMA prepolymer resin is obtained. S3. Mix the modified PMMA prepolymer resin obtained in step S2, 70-90 parts of methyl methacrylate and 5-14 parts of solvent in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube. After purging with nitrogen for 25-30 minutes, add 0.5-1 parts of nano silica, 0.5-1 parts of substrate wetting agent and 0.5-1 parts of dispersant. Disperse and grind for 25-30 minutes, pass through a 200-mesh sieve, and then add 0.5-1 parts of benzoyl peroxide to obtain the modified PMMA superhydrophobic anti-icing coating.

[0009] Preferably, the preparation of the silane modifier includes the following steps: S11. By weight, mix 3-5 parts of silane coupling agent KH-570, 8-10 parts of isooctyltriethoxysilane, 1-3 parts of tetraethoxysilane and 8-15 parts of anhydrous ethanol, and stir at 300-400 r / min until the mixture is uniform. S12. Mix 2-4 parts of deionized water with 0.1-0.5 parts of glacial acetic acid and slowly add it to the solution obtained in step S11. The addition time is controlled at 10-15 min. Adjust the pH to 3-4 using dilute hydrochloric acid. S13. Add 0.05-0.2 parts of dibutyltin dilaurate to the solution obtained in step S12, heat to 45-50℃, stir at 200-300 r / min for 4-6 h, and then perform vacuum distillation to finally obtain the silane modifier.

[0010] Preferably, the preparation of the functional monomer modifier includes the following steps: S21. By weight, 70-90 parts of methyl methacrylate, 5-15 parts of isobornyl methacrylate, and 3-6 parts of dodecafluoroheptyl methacrylate are mixed in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube to obtain a premixed solution. S22. Add 0.1-0.5 parts of dodecanethiol, 0.05-0.2 parts of p-hydroxyanisole and 5-8 parts of butyl acetate to the premix obtained in step S21. After purging with nitrogen for 25-30 minutes, stir at 200-300 r / min until the mixture is homogeneous to obtain the functional monomer modifier.

[0011] Preferably, the solvent in steps S2 and S3 is a mixed solution of butyl acetate and xylene in a mass ratio of 1:1.

[0012] Preferably, the mass concentration of benzoyl peroxide in step S2 is 0.5-1%.

[0013] Preferably, the rotation speed of dispersion grinding in step S3 is 1000-1200 rpm.

[0014] Preferably, the temperature for vacuum distillation is 50-60℃ and the pressure is 0.08-0.09MPa.

[0015] A high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating is prepared by the above preparation method.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention avoids gelation during polymerization through the synergistic effect of silane modifiers and functional monomer modifiers, ensuring the film-forming properties and storage stability of the resin. This results in a stable coating contact angle exceeding 150°, and significantly superior anti-icing performance compared to ordinary PMMA coatings. Furthermore, the synergistic effect of these two modifiers allows the modified PMMA prepolymer resin to form a partially inorganic-organic hybrid structure after film formation, greatly improving the coating's heat resistance, UV aging resistance, and long-term outdoor durability.

[0017] 2. Compared with traditional physical blending, the chemical grafting of this invention effectively avoids phase separation, so that the hydrophobic segments are evenly distributed on the surface and inside of the coating, significantly improving the hydrophobic stability and durability of the coating. It breaks through the technical bottleneck of traditional PMMA coatings, which are difficult to balance hydrophobicity, hardness and durability. It is suitable for high weather resistance and high durability applications such as wind turbine blades, marine engineering equipment and automotive exterior parts. Attached Figure Description

[0018] Figure 1 This is a process flow diagram for preparing the high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating of the present invention. Figure 2 This is a process flow diagram for preparing the silane modifier of the present invention; Figure 3 This is a process flow diagram for preparing the functional monomer modifier of the present invention; Figure 4 The image shows the micron-scale morphology of the modified PMMA superhydrophobic anti-icing coating obtained in Example 1 of this invention. Figure 5 This is a nanoscale microstructure image of the modified PMMA prepolymer resin obtained in Example 1 of the present invention. Detailed Implementation

[0019] The present invention will now be clearly and completely described in conjunction with embodiments thereof. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-5 The present invention provides a technical solution: Example 1 A method for preparing a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating: Before preparing the modified PMMA superhydrophobic anti-icing coating, silane modifiers and functional monomer modifiers are prepared first: The preparation of silane modifiers includes the following steps: S11. Mix 3g of silane coupling agent KH-570, 8g of isooctyltriethoxysilane, 1g of tetraethoxysilane and 8g of anhydrous ethanol, and stir at 300r / min until the mixture is uniform. S12. Mix 2g of deionized water with 0.1g of glacial acetic acid and slowly add it to the solution obtained in step S11. The addition time is controlled at 10min. Adjust the pH to 3 using dilute hydrochloric acid. S13. Add 0.05 g of dibutyltin dilaurate to the solution obtained in step S12, heat to 45°C, stir at 200 r / min for 4 h, and then perform vacuum distillation at 50°C and 0.08 MPa to finally obtain the silane modifier.

[0021] The preparation of functional monomer modifiers includes the following steps: S21. Mix 70g of methyl methacrylate, 5g of isobornyl methacrylate and 3g of dodecafluoroheptyl methacrylate in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube to obtain a premixed solution. S22. Add 0.1g dodecanethiol, 0.05g p-hydroxyanisole and 5g butyl acetate to the premix obtained in step S21. After purging with nitrogen for 25 minutes, stir at 200 r / min until the mixture is homogeneous to obtain the functional monomer modifier.

[0022] S1. Mix 15g of silane modifier, 5g of anhydrous ethanol and 1g of deionized water, and adjust the pH to 3 with dilute hydrochloric acid to obtain a cocondensate. S2. The cocondensate obtained in step S1, 70g of functional monomer modifier and 5g of solvent (a mixed solution of butyl acetate and xylene in a mass ratio of 1:1) are mixed in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube. Nitrogen gas is purged for 25min and the temperature is raised to 75℃. Then 0.5g of p-hydroxyanisole is added. After reacting for 6h, excess anhydrous ethanol is added to precipitate the product. After filtration and drying, the modified PMMA prepolymer resin is obtained. S3. The modified PMMA prepolymer resin obtained in step S2, 70g of methyl methacrylate and 5g of solvent (a mixed solution of butyl acetate and xylene in a mass ratio of 1:1) are mixed in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube. After purging with nitrogen for 25 minutes, 0.5g of nano silica, 0.5g of substrate wetting agent (BYK-306) and 0.5g of dispersant (BYK-110) are added. The mixture is dispersed and ground at 1000 rpm for 25 minutes, passed through a 200-mesh sieve, and then 0.5g of 0.5% benzoyl peroxide is added to obtain the modified PMMA superhydrophobic anti-icing coating.

[0023] Example 2 A method for preparing a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating: Before preparing the modified PMMA superhydrophobic anti-icing coating, silane modifiers and functional monomer modifiers are prepared first: The preparation of silane modifiers includes the following steps: S11. Mix 5g of silane coupling agent KH-570, 10g of isooctyltriethoxysilane, 3g of tetraethoxysilane and 15g of anhydrous ethanol, and stir at 400r / min until the mixture is uniform. S12. Mix 4g of deionized water with 0.5g of glacial acetic acid and slowly add it to the solution obtained in step S11. The addition time is controlled at 15min. Adjust the pH to 4 using dilute hydrochloric acid. S13. Add 0.2 g of dibutyltin dilaurate to the solution obtained in step S12, heat to 50°C, stir at 300 r / min for 6 h, and then perform vacuum distillation at 60°C and 0.09 MPa to finally obtain the silane modifier.

[0024] The preparation of functional monomer modifiers includes the following steps: S21. Mix 90g of methyl methacrylate, 15g of isobornyl methacrylate and 6g of dodecafluoroheptyl methacrylate in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube to obtain a premixed solution. S22. Add 0.5g dodecanethiol, 0.2g p-hydroxyanisole and 8g butyl acetate to the premix obtained in step S21. After purging with nitrogen for 30 minutes, stir at 300 r / min until the mixture is homogeneous to obtain the functional monomer modifier.

[0025] S1. Mix 20g of silane modifier, 20g of anhydrous ethanol and 3g of deionized water, and adjust the pH to 4 with dilute hydrochloric acid to obtain a cocondensate; S2. The cocondensate obtained in step S1, 90g of functional monomer modifier and 14g of solvent (a mixed solution of butyl acetate and xylene in a mass ratio of 1:1) are mixed in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube. Nitrogen gas is purged for 30min and the temperature is raised to 80℃. Then 1g of p-hydroxyanisole is added. After reacting for 8h, excess anhydrous ethanol is added to precipitate the product. After filtration and drying, the modified PMMA prepolymer resin is obtained. S3. The modified PMMA prepolymer resin obtained in step S2, 90g of methyl methacrylate and 14g of solvent (a mixed solution of butyl acetate and xylene in a mass ratio of 1:1) are mixed in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube. After purging with nitrogen for 30 minutes, 1g of nano silica, 1g of substrate wetting agent (BYK-306) and 1g of dispersant (BYK-110) are added. The mixture is dispersed and ground at 1200 rpm for 30 minutes, passed through a 200-mesh sieve, and then 1g of benzoyl peroxide with a mass concentration of 1% is added to obtain the modified PMMA superhydrophobic anti-icing coating.

[0026] Example 3 A method for preparing a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating: Before preparing the modified PMMA superhydrophobic anti-icing coating, silane modifiers and functional monomer modifiers are prepared first: The preparation of silane modifiers includes the following steps: S11. Mix 4g of silane coupling agent KH-570, 9g of isooctyltriethoxysilane, 2g of tetraethoxysilane and 11g of anhydrous ethanol, and stir at 350r / min until the mixture is uniform. S12. Mix 3g of deionized water with 0.3g of glacial acetic acid and slowly add it to the solution obtained in step S11. The addition time is controlled at 12min. Adjust the pH to 3.5 using dilute hydrochloric acid. S13. Add 0.1g of dibutyltin dilaurate to the solution obtained in step S12, heat to 48℃, stir at 250r / min for 5h, and then perform vacuum distillation at 55℃ and 0.085MPa to finally obtain the silane modifier.

[0027] The preparation of functional monomer modifiers includes the following steps: S21. Mix 80g of methyl methacrylate, 10g of isobornyl methacrylate and 5g of dodecafluoroheptyl methacrylate in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube to obtain a premixed solution. S22. Add 0.3g dodecanethiol, 0.1g p-hydroxyanisole and 6g butyl acetate to the premix obtained in step S21. After purging with nitrogen for 28 minutes, stir at 250 r / min until the mixture is homogeneous to obtain the functional monomer modifier.

[0028] S1. Mix 18g of silane modifier, 11g of anhydrous ethanol and 2g of deionized water, and adjust the pH to 3.5 with dilute hydrochloric acid to obtain a cocondensate; S2. The cocondensate obtained in step S1, 80g of functional monomer modifier and 8g of solvent (a mixed solution of butyl acetate and xylene in a mass ratio of 1:1) are mixed in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube. Nitrogen gas is purged for 28 min and the temperature is raised to 78°C. Then 0.8g of p-hydroxyanisole is added. After reacting for 7 h, excess anhydrous ethanol is added to precipitate the product. After filtration and drying, the modified PMMA prepolymer resin is obtained. S3. The modified PMMA prepolymer resin obtained in step S2, 80g of methyl methacrylate and 10g of solvent (a mixed solution of butyl acetate and xylene in a mass ratio of 1:1) are mixed in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube. After purging with nitrogen for 28 minutes, 0.8g of nano silica, 0.8g of substrate wetting agent (BYK-306) and 0.8g of dispersant (BYK-110) are added. The mixture is dispersed and ground at 1100 rpm for 28 minutes, passed through a 200-mesh sieve, and then 0.8g of benzoyl peroxide with a mass concentration of 0.8% is added to obtain the modified PMMA superhydrophobic anti-icing coating.

[0029] Comparative Example 1 The only difference between Comparative Example 1 and Example 1 is that the functional monomer modifier in this comparative example is replaced with isooctyltriethoxysilane. The remaining steps are exactly the same in Comparative Example 1 and Example 1.

[0030] Comparative Example 2 The only difference between Comparative Example 2 and Example 1 is that the silane modifier is replaced with a mixed solution of silane coupling agent KH-570 and isooctyltriethoxysilane in a mass ratio of 1:2. The remaining steps are exactly the same in Comparative Example 2 and Example 1.

[0031] Comparative Example 3 This comparative example compares the performance of a conventional PMMA coating with that of the modified PMMA superhydrophobic anti-icing coating obtained in the examples.

[0032] Performance testing: This invention observes the microstructure of the modified PMMA superhydrophobic anti-icing coating and the modified PMMA prepolymer resin obtained in Example 1. (See attached image) Figure 4 The image shows the micron-scale morphology of the modified PMMA superhydrophobic anti-icing coating obtained in Example 1 of this invention. Figure 5 This is a nanoscale microstructure image of the modified PMMA prepolymer resin obtained in Example 1 of the present invention. Figure 4 It has a micron-level microstructure, and it can be seen that the surface of the modified PMMA superhydrophobic anti-icing coating is mainly composed of fluffy nanoparticles stacked and bonded together, so that the coating surface maintains the Cassie-Baxter state. Figure 5 It has a nanoscale structure. As can be seen from the figure, the microscopic papillae on the surface of the modified PMMA prepolymer resin are a characteristic structure of lotus leaf biomimicry.

[0033] According to GB / T 30693-2014 "Measurement of the contact angle between plastic film and water", the OCA20 contact angle measuring instrument was used to test the surface contact angle of the modified PMMA superhydrophobic anti-icing coating obtained in Examples 1-3 and Comparative Examples 1-2 at 25°C using the static drop method. The test liquid was deionized water (5 μL).

[0034] According to GB / T 6739-2006 "Paints and Varnishes - Determination of Hardness of Paint Films by Pencil Method", pencils of different hardness (Mitsubishi UNI series) were used to scratch the coating surface at a 45° angle and a load of 750g. The highest pencil hardness that did not break the coating was taken as the hardness value of the modified PMMA superhydrophobic anti-icing coating obtained in Examples 1-3 and Comparative Examples 1-2.

[0035] According to GB / T 9286-1998 "Cross-cut test for paint and varnish films", 100 1mm × 1mm squares were cut on the surface of the modified PMMA superhydrophobic anti-icing coatings obtained in Examples 1-3 and Comparative Examples 1-2 using a cross-cutting knife. After being adhered with 3M 600 tape, the squares were quickly peeled off, and the coating peeling was observed. Adhesion grade 0: The cut edges were completely smooth, with no squares peeling off; Adhesion grade 1: Minor peeling occurred at the intersections of the cuts, with a peeling area ≤ 5%.

[0036] According to GB / T 1768-2006 "National Standard for Determination of Abrasion Resistance of Paints and Varnishes", a Taber 5135 abrasion testing machine with a CS-10 grinding wheel was used. The load was 500g, the rotation speed was 60 r / min, and the mass loss of the modified PMMA superhydrophobic anti-icing coatings obtained in Examples 1-3 and Comparative Examples 1-2 was measured after 1000 revolutions. The data obtained are shown in Table 1 below: Table 1 Performance Test Results In this invention, the modified PMMA superhydrophobic anti-icing coatings obtained in Examples 1-3 and Comparative Examples 1-2 were placed on a -15℃ constant temperature cold table, and 5 μL of deionized water was added. The time from contact to complete freezing of the water droplets was recorded. At -15℃, a 10 mm diameter polytetrafluoroethylene mold was placed on the coating surface, deionized water was injected, and it was frozen for 2 hours to form an ice column. The force required for the ice column to detach vertically was tested using a push-pull force gauge, and the ice adhesion strength (kPa) was calculated. An uncoated aluminum plate was used as a blank control, and the reduction rate of ice adhesion strength was calculated. The results are shown in Table 2 below: Table 2. Anti-icing performance test results As can be seen from the data in Tables 1 and 2, the modified PMMA superhydrophobic anti-icing coating obtained in the embodiments of the present invention outperforms the comparative example in all aspects of performance. This proves that the preparation process of the present invention and the synergistic effect of the silane modifier and the functional monomer modifier have made significant contributions to hydrophobicity, hardness, adhesion, wear resistance and anti-icing performance, breaking through the technical bottleneck of traditional PMMA coatings that are difficult to balance hydrophobicity, hardness and durability.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating, characterized in that, Includes the following steps: S1. By weight, mix 15-20 parts of silane modifier, 5-20 parts of anhydrous ethanol and 1-3 parts of deionized water, and adjust the pH to 3-4 using dilute hydrochloric acid to obtain a cocondensate. S2. The cocondensate obtained in step S1, 70-90 parts of functional monomer modifier and 5-14 parts of solvent are mixed in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube. Nitrogen gas is purged for 25-30 minutes and the temperature is raised to 75-80℃. Then 0.5-1 parts of p-hydroxyanisole are added. After reacting for 6-8 hours, excess anhydrous ethanol is added to precipitate the product. After filtration and drying, the modified PMMA prepolymer resin is obtained. S3. Mix the modified PMMA prepolymer resin obtained in step S2, 70-90 parts of methyl methacrylate and 5-14 parts of solvent in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube. After purging with nitrogen for 25-30 minutes, add 0.5-1 parts of nano silica, 0.5-1 parts of substrate wetting agent and 0.5-1 parts of dispersant. Disperse and grind for 25-30 minutes, pass through a 200-mesh sieve, and then add 0.5-1 parts of benzoyl peroxide to obtain the modified PMMA superhydrophobic anti-icing coating.

2. The preparation method of a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating according to claim 1, characterized in that, The preparation of the silane modifier includes the following steps: S11. By weight, mix 3-5 parts of silane coupling agent KH-570, 8-10 parts of isooctyltriethoxysilane, 1-3 parts of tetraethoxysilane and 8-15 parts of anhydrous ethanol, and stir at 300-400 r / min until the mixture is uniform. S12. Mix 2-4 parts of deionized water with 0.1-0.5 parts of glacial acetic acid and slowly add it to the solution obtained in step S11. The addition time is controlled at 10-15 min. Adjust the pH to 3-4 using dilute hydrochloric acid. S13. Add 0.05-0.2 parts of dibutyltin dilaurate to the solution obtained in step S12, heat to 45-50℃, stir at 200-300 r / min for 4-6 h, and then perform vacuum distillation to finally obtain the silane modifier.

3. The preparation method of a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating according to claim 1, characterized in that, The preparation of the functional monomer modifier includes the following steps: S21. By weight, 70-90 parts of methyl methacrylate, 5-15 parts of isobornyl methacrylate, and 3-6 parts of dodecafluoroheptyl methacrylate are mixed in a three-necked flask equipped with a reflux condenser and a nitrogen delivery tube to obtain a premixed solution. S22. Add 0.1-0.5 parts of dodecanethiol, 0.05-0.2 parts of p-hydroxyanisole and 5-8 parts of butyl acetate to the premix obtained in step S21. After purging with nitrogen for 25-30 minutes, stir at 200-300 r / min until the mixture is homogeneous to obtain the functional monomer modifier.

4. The preparation method of a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating according to claim 1, characterized in that, The solvent in steps S2 and S3 is a mixed solution of butyl acetate and xylene in a mass ratio of 1:

1.

5. The preparation method of a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating according to claim 1, characterized in that, In step S3, the mass concentration of benzoyl peroxide is 0.5-1%.

6. The preparation method of a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating according to claim 1, characterized in that, The speed of dispersion grinding in step S3 is 1000-1200 rpm.

7. The preparation method of a high-durability isooctyl / acryloyloxy mixed siloxane modified PMMA superhydrophobic anti-icing coating according to claim 2, characterized in that, The vacuum distillation is carried out at a temperature of 50-60℃ and a pressure of 0.08-0.09MPa.

8. A high-durability isooctyl / acryloyloxy blended siloxane modified PMMA superhydrophobic anti-icing coating, characterized in that, It is prepared by the preparation method described in any one of claims 1-7.

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