An anti-icing insulating coating and a preparation method thereof

Abstract

This invention relates to the field of coating technology, specifically to an anti-icing insulating coating and its preparation method, comprising the following raw materials in parts by weight: 100 parts epoxy resin, 25-35 parts filler, 6-8 parts curing agent, 10-15 parts diluent, and 1-1.5 parts defoamer. In this invention, the powder, paraffin wax, and stearic acid are mixed under high temperature and negative pressure, giving the powder a wax-like surface that makes it difficult for water droplets to spread, shortening the residence time of water droplets on the surface and reducing icing. Simultaneously, the porous structure of zeolite in the additives traps air, forming a thermal barrier layer. Furthermore, the latent heat absorbed by the solid-liquid phase transition of paraffin wax near its freezing point further delays surface cooling. Carbon black and the activated rice husk ash and corn cob in the additives have photothermal conversion capabilities, causing the coating surface temperature to be slightly higher than the ambient temperature under natural light, weakening the adhesion of the ice layer. These synergistic effects enhance the anti-icing performance of the coating.

Description

Technical Field

[0001] This invention relates to the field of coating technology, specifically to an anti-icing insulating coating and its preparation method. Background Technology

[0002] Paint is a material that is applied to the surface of an object by brushing, spraying, or rolling to form a continuous, firmly adhered solid film with specific anti-icing functions. The core functions of paint are firstly anti-icing and protection, and secondly decoration. It is widely used in various aspects of daily life.

[0003] In existing technologies, the power industry has adopted various anti-icing and de-icing technologies to address the hazards of icing, mainly including thermal melting, mechanical de-icing, and salt de-icing. However, thermal melting and mechanical de-icing suffer from high energy consumption, complex equipment, and limited efficiency. While salt de-icing is simple to operate, it is difficult to apply to transmission lines. Therefore, this invention provides an anti-icing insulating coating and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-icing insulating coating and its preparation method. The coating prepared by this invention not only has good anti-icing performance, but also excellent insulation performance, effectively improving the performance of the coating.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an anti-icing insulating coating, comprising the following raw materials in parts by weight: 100 parts epoxy resin, 25-35 parts filler, 6-8 parts curing agent, 10-15 parts diluent and 1-1.5 parts defoamer; The raw materials for the filler include powder, paraffin wax, stearic acid, chitosan, acetic acid solution, and sodium tripolyphosphate solution; The raw materials for the powder include additives, tannic acid, deionized water, ferric chloride, auxiliaries, and polyethylene glycol.

[0006] Furthermore, the packing material is prepared by the following method: Step 1: Mix the powder, paraffin wax, and stearic acid at 80-90℃ and -0.1MPa for 2 hours to obtain the first mixture; Step 2: Mix chitosan with a 3-4% (w / w) acetic acid solution and stir at 200-300 rpm for 30-40 minutes to obtain a second mixture; Step 3: Add the first mixture to the second mixture and stir for 1-2 hours at 50-60℃ and 300-400rpm. Add a sodium tripolyphosphate solution with a mass concentration of 2-4% and continue stirring for 1-2 hours. Filter, take the first solid product, wash, vacuum dry at 80℃ for 8-10 hours, pulverize and pass through a 300-400 mesh sieve to obtain the filler.

[0007] Further, the mass ratio of the powder, paraffin and stearic acid is 1:(0.6-0.7):(0.08-0.12), the mass ratio of chitosan and acetic acid solution is 1:10, and the mass ratio of the first mixture, the second mixture and sodium tripolyphosphate solution is 1:(4-6):(1-2).

[0008] Further, the powder is prepared by the following method: the additives, tannic acid and deionized water are mixed and stirred at 40-50℃ and 200-300rpm for 1-2 hours, ferric chloride is added and stirring is continued for 40-60 minutes, the auxiliary agent and polyethylene glycol are added and mixed at 40-60℃ and 200-300rpm for 20-30 minutes, filtered, the second solid product is taken, washed, dried at 60℃ for 10-12 hours, pulverized, and passed through a 100-200 mesh sieve to obtain the powder.

[0009] Further, the mass ratio of the additives, tannic acid, deionized water, ferric chloride, auxiliary agents and polyethylene glycol is 1:(0.18-0.22):(12-18):(0.03-0.05):(0.28-0.32):(0.1-0.2).

[0010] Further, the additive is prepared by the following method: zeolite, carbon black, and silane coupling agent KH550 are mixed and stirred at 70°C and 200-400 rpm for 1-2 hours. Hexadecyltrimethylammonium bromide and deionized water are added and stirring is continued for 4-6 hours. The mixture is filtered, and the third solid product is taken, washed, and dried in an oven at 105°C for 8 hours to obtain the additive. The mass ratio of zeolite, carbon black, and silane coupling agent KH550 is 1:(0.02-0.04):(0.02-0.04), the mass of hexadecyltrimethylammonium bromide is 35-45% of the mass of zeolite, and the mass of deionized water is 6-8 times that of zeolite.

[0011] Furthermore, the auxiliary agent is prepared by the following method: Step A: Mix rice husk ash and sodium hydroxide solution, stir for 3 hours at 60-80℃ and 200-400rpm, filter, take the fourth solid product, wash, and dry at 105℃ for 6 hours to obtain the coarse material; Step B: Crush corn cobs through a 100-mesh sieve to obtain corn cob powder. Mix the corn cob powder with zinc chloride solution and mix at 100-200 rpm for 10-12 hours. Filter and take the fifth solid product. Wash and dry in a 100℃ oven for 8 hours. Then, under nitrogen protection, heat to 500-600℃ at 5℃ / min and hold for 2-3 hours. Cool to obtain the cooled product. Add coarse material and anhydrous ethanol and sonicate at 40-60℃, 40-60kHz, and 200-300W for 40 minutes. Filter and take the sixth solid product. Dry at 70-80℃ for 10 hours to obtain the additive.

[0012] Furthermore, the mass ratio of rice husk ash to sodium hydroxide solution is 1:(3-5), the mass concentration of sodium hydroxide solution is 20-30%, the mass ratio of corn cob powder to zinc chloride solution is 1:3, the mass concentration of zinc chloride solution is 30%, and the mass ratio of cooling product, coarse material and anhydrous ethanol is (0.8-1):1:6.

[0013] Furthermore, the epoxy resin is epoxy resin E-51, the defoamer is silicone defoamer BYK-088, the diluent is butyl glycidyl ether, and the curing agent is polyamide 650 curing agent.

[0014] Furthermore, the preparation method of the anti-icing insulating coating includes the following steps: weighing epoxy resin, filler, diluent and defoamer as needed and adding them to a reaction vessel, setting the temperature to 40-60℃, stirring speed to 400-500 rpm, stirring for 30-40 minutes, then adding curing agent, and continuing to stir for 10-15 minutes to obtain the anti-icing insulating coating.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, powder, paraffin wax, and stearic acid are mixed under high temperature and negative pressure, giving the powder a wax-like surface that makes water droplets spherical and difficult to spread, significantly shortening the residence time of water droplets on the surface and reducing icing. At the same time, the porous structure of zeolite in the additives traps air, forming a thermal barrier layer. Paraffin wax absorbs latent heat during solid-liquid phase transition near its freezing point, further delaying surface cooling. Carbon black and activated rice husk ash and corn cob in the additives have photothermal conversion capabilities, causing the coating surface temperature to be slightly higher than the ambient temperature under natural light, weakening the adhesion of the ice layer. These synergistic effects improve the anti-icing performance of the coating. Attached Figure Description

[0016] Figure 1 The present invention provides a flowchart of an anti-icing insulating coating and its preparation method. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that the raw materials used in the following embodiments are all commercially available.

[0019] Example 1: Raw material preparation for anti-icing insulating coating: 100 parts epoxy resin, 25 parts filler, 6 parts curing agent, 10 parts diluent and 1 part defoamer; The raw material preparation for the filler includes powder, paraffin, stearic acid, chitosan, acetic acid solution and sodium tripolyphosphate solution; The raw material preparation for the powder includes additives, tannic acid, deionized water, ferric chloride, auxiliaries, and polyethylene glycol.

[0020] Preparation of filler: Step 1: Take powder, paraffin and stearic acid in a mass ratio of 1:0.6:0.08 and mix them at 80℃ and -0.1MPa for 2 hours to obtain the first mixture; Step 2: Mix chitosan and acetic acid solution at 200 rpm for 30 min to obtain a second mixture. Add the first mixture and stir at 50℃ and 300 rpm for 1 h. Add a 2% (w / w) sodium tripolyphosphate solution and continue stirring for 1 h. Filter to obtain the first solid product. Wash and vacuum dry at 80℃ for 8 h. Pulverize and pass through a 300-mesh sieve to obtain the filler. The mass ratio of chitosan to acetic acid solution is 1:10, the mass concentration of acetic acid solution is 3%, and the mass ratio of the first mixture, the second mixture, and the sodium tripolyphosphate solution is 1:4:1.

[0021] Preparation of powder: Take the additive, tannic acid and deionized water, mix them at 40℃ and 200rpm for 1h, the resulting product is mixed with ferric chloride for 40min, add the auxiliary agent and polyethylene glycol, mix at 40℃ and 200rpm for 20min, filter to obtain the second solid product, wash, dry at 60℃ for 10h, pulverize, pass through a 100-mesh sieve to obtain the powder, wherein the mass ratio of additive, tannic acid, deionized water, ferric chloride, auxiliary agent and polyethylene glycol is 1:0.18:12:0.03:0.28:0.1.

[0022] Preparation of additive: Zeolite, carbon black and silane coupling agent KH550 were mixed at a mass ratio of 1:0.02:0.02 and stirred at 70℃ and 200rpm for 1h. Then, 35% of the mass of zeolite, hexadecyltrimethylammonium bromide and 6 times the mass of zeolite, deionized water were added and stirred for 4h. The third solid product was obtained by filtration, washed and dried in an oven at 105℃ for 8h to obtain the additive.

[0023] Preparation of additives: Step A: Mix rice husk ash and sodium hydroxide solution at a mass ratio of 1:3, stir at 60℃ and 200 rpm for 3 hours, filter to obtain the fourth solid product, wash and dry at 105℃ for 6 hours to obtain the crude material, wherein the mass concentration of sodium hydroxide solution is 20%; Step B: Take corn cobs, crush them, and pass them through a 100-mesh sieve to obtain corn cob powder. Mix the corn cob powder with zinc chloride solution at a mass ratio of 1:3 and mix at 100 rpm for 10 hours. Filter the mixture, take the fifth solid product, wash it, and dry it in a 100℃ oven for 8 hours. Then, under nitrogen protection, heat the mixture to 500℃ at 5℃ / min and hold it for 2 hours. Cool the mixture to obtain the cooled product. The mass concentration of the zinc chloride solution is 30%. Step C: Take the cooled product, crude material and anhydrous ethanol in a mass ratio of 0.8:1:6 and mix them. Sonicate the mixture for 40 min at 40℃, 40 kHz and 200 W. Filter the mixture to obtain the sixth solid product. Dry the mixture at 70℃ for 10 h to obtain the additive.

[0024] The epoxy resin is epoxy resin E-51, the defoamer is silicone defoamer BYK-088, the diluent is butyl glycidyl ether, and the curing agent is polyamide 650 curing agent.

[0025] Preparation of anti-icing insulating coating: Weigh epoxy resin, filler, diluent and defoamer as needed and add them to the reaction vessel. Set the temperature to 40℃ and the stirring speed to 400 rpm. Stir for 30 min, then add curing agent and continue stirring for 10 min to obtain anti-icing insulating coating.

[0026] Example 2: Raw material preparation for anti-icing insulating coating: 100 parts epoxy resin, 30 parts filler, 7 parts curing agent, 12 parts diluent and 1.2 parts defoamer; The raw material preparation for the filler includes powder, paraffin, stearic acid, chitosan, acetic acid solution and sodium tripolyphosphate solution; The raw material preparation for the powder includes additives, tannic acid, deionized water, ferric chloride, auxiliaries, and polyethylene glycol.

[0027] Preparation of filler: Step 1: Take powder, paraffin and stearic acid in a mass ratio of 1:0.65:0.1 and mix them at 85℃ and -0.1MPa for 2 hours to obtain the first mixture; Step 2: Chitosan and acetic acid solution are mixed at 250 rpm for 35 min to obtain a second mixture. The first mixture is added, and the mixture is stirred at 55℃ and 350 rpm for 1.5 h. A 3% sodium tripolyphosphate solution is added, and the mixture is stirred for another 1.5 h. The mixture is filtered to obtain a first solid product. After washing, the product is vacuum dried at 80℃ for 9 h. After pulverizing, the product is passed through a 350-mesh sieve to obtain the filler. The mass ratio of chitosan to acetic acid solution is 1:10, the mass concentration of acetic acid solution is 3.5%, and the mass ratio of the first mixture, the second mixture, and the sodium tripolyphosphate solution is 1:5:1.5.

[0028] Preparation of powder: Take the additive, tannic acid and deionized water, mix them at 45℃ and 250rpm for 1.5h, the resulting product is mixed with ferric chloride for 50min, add the auxiliary agent and polyethylene glycol, mix at 50℃ and 250rpm for 25min, filter to obtain the second solid product, wash, dry at 60℃ for 11h, pulverize, and pass through a 150-mesh sieve to obtain the powder. The mass ratio of additive, tannic acid, deionized water, ferric chloride, auxiliary agent and polyethylene glycol is 1:0.2:15:0.04:0.3:0.15.

[0029] Preparation of additive: Zeolite, carbon black and silane coupling agent KH550 were mixed at a mass ratio of 1:0.03:0.03 and stirred at 70℃ and 300rpm for 1.5h. 40% of the mass of zeolite in hexadecyltrimethylammonium bromide and 7 times the mass of zeolite in deionized water were added and stirred continuously for 5h. The third solid product was obtained by filtration, washed and dried in an oven at 105℃ for 8h to obtain the additive.

[0030] Preparation of additives: Step A: Mix rice husk ash and sodium hydroxide solution at a mass ratio of 1:4, stir at 70℃ and 300 rpm for 3 hours, filter to obtain the fourth solid product, wash and dry at 105℃ for 6 hours to obtain the crude material, wherein the mass concentration of sodium hydroxide solution is 25%; Step B: Take corn cobs, crush them, and pass them through a 100-mesh sieve to obtain corn cob powder. Mix the corn cob powder with zinc chloride solution at a mass ratio of 1:3 and mix at 150 rpm for 11 hours. Filter the mixture, take the fifth solid product, wash it, and dry it in a 100℃ oven for 8 hours. Then, under nitrogen protection, heat the mixture to 550℃ at 5℃ / min and hold it for 2.5 hours. Cool the mixture to obtain the cooled product. The mass concentration of the zinc chloride solution is 30%. Step C: Take the cooled product, crude material and anhydrous ethanol in a mass ratio of 0.9:1:6 and mix them. Sonicate the mixture at 50℃, 50kHz and 250W for 40min. Filter to obtain the sixth solid product and dry it at 75℃ for 10h to obtain the auxiliary agent.

[0031] The epoxy resin is epoxy resin E-51, the defoamer is silicone defoamer BYK-088, the diluent is butyl glycidyl ether, and the curing agent is polyamide 650 curing agent.

[0032] Preparation of anti-icing insulating coating: Weigh epoxy resin, filler, diluent and defoamer as needed and add them to the reaction vessel. Set the temperature to 50℃, the stirring speed to 450 rpm, and stir for 35 minutes. Then add curing agent and continue stirring for 12 minutes to obtain anti-icing insulating coating.

[0033] Example 3: Raw material preparation for anti-icing insulating coating: 100 parts epoxy resin, 35 parts filler, 8 parts curing agent, 15 parts diluent and 1.5 parts defoamer; The raw material preparation for the filler includes powder, paraffin, stearic acid, chitosan, acetic acid solution and sodium tripolyphosphate solution; The raw material preparation for the powder includes additives, tannic acid, deionized water, ferric chloride, auxiliaries, and polyethylene glycol.

[0034] Preparation of filler: Step 1: Take powder, paraffin and stearic acid in a mass ratio of 1:0.7:0.12 and mix them at 90℃ and -0.1MPa for 2 hours to obtain the first mixture; Step 2: Chitosan and acetic acid solution are mixed at 300 rpm for 40 min to obtain a second mixture. The first mixture is added, and the mixture is stirred at 60℃ and 400 rpm for 2 h. A 4% sodium tripolyphosphate solution is added, and the mixture is stirred for another 2 h. The mixture is filtered to obtain a first solid product. After washing, the product is vacuum dried at 80℃ for 10 h. After pulverizing, the product is passed through a 400-mesh sieve to obtain the filler. The mass ratio of chitosan to acetic acid solution is 1:10, the mass concentration of acetic acid solution is 4%, and the mass ratio of the first mixture, the second mixture, and the sodium tripolyphosphate solution is 1:6:2.

[0035] Preparation of powder: Take the additive, tannic acid and deionized water, mix them at 50℃ and 300rpm for 2h, the resulting product is mixed with ferric chloride for 60min, add the auxiliary agent and polyethylene glycol, mix at 60℃ and 300rpm for 30min, filter to obtain the second solid product, wash, dry at 60℃ for 12h, pulverize, pass through a 200-mesh sieve to obtain the powder, wherein the mass ratio of additive, tannic acid, deionized water, ferric chloride, auxiliary agent and polyethylene glycol is 1:0.22:18:0.05:0.32:0.2.

[0036] Preparation of additive: Zeolite, carbon black and silane coupling agent KH550 were mixed at a mass ratio of 1:0.04:0.04 and stirred at 70℃ and 400rpm for 2h. Then, 45% of the mass of zeolite, hexadecyltrimethylammonium bromide and 8 times the mass of zeolite, deionized water were added and stirred for 6h. The third solid product was obtained by filtration, washed and dried in an oven at 105℃ for 8h to obtain the additive.

[0037] Preparation of additives: Step A: Mix rice husk ash and sodium hydroxide solution at a mass ratio of 1:5, stir at 80℃ and 400rpm for 3 hours, filter to obtain the fourth solid product, wash and dry at 105℃ for 6 hours to obtain the crude material, wherein the mass concentration of sodium hydroxide solution is 30%; Step B: Take corn cobs, crush them, and pass them through a 100-mesh sieve to obtain corn cob powder. Mix the corn cob powder with zinc chloride solution at a mass ratio of 1:3 and mix at 200 rpm for 12 hours. Filter the mixture, take the fifth solid product, wash it, and dry it in a 100℃ oven for 8 hours. Then, under nitrogen protection, heat the mixture to 600℃ at 5℃ / min and hold it for 3 hours. Cool the mixture to obtain the cooled product. The mass concentration of the zinc chloride solution is 30%. Step C: Take the cooled product, crude material and anhydrous ethanol in a mass ratio of 1:1:6 and mix them. Sonicate the mixture at 60℃, 60kHz and 300W for 40min. Filter to obtain the sixth solid product and dry it at 80℃ for 10h to obtain the auxiliary agent.

[0038] The epoxy resin is epoxy resin E-51, the defoamer is silicone defoamer BYK-088, the diluent is butyl glycidyl ether, and the curing agent is polyamide 650 curing agent.

[0039] Preparation of anti-icing insulating coating: Weigh epoxy resin, filler, diluent and defoamer as needed and add them to the reaction vessel. Set the temperature to 60℃, the stirring speed to 500 rpm, and stir for 40 min. Then add curing agent and continue stirring for 15 min to obtain anti-icing insulating coating.

[0040] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain fillers.

[0041] Comparative Example 2 differs from Example 1 in that it does not contain any additives.

[0042] Comparative Example 3 differs from Example 1 in that it does not contain any additives.

[0043] Performance testing: Performance tests were conducted on the coatings treated in Examples 1-3 and Comparative Examples 1-3, and the test data are recorded in the table below: Table 1

[0044] In the performance test, the insulation performance was tested according to GB / T1410-2006. The higher the value, the better the insulation performance. The anti-icing performance was tested according to T / CEC184-2018. The lower the value, the better the anti-icing performance.

[0045] Among them, the insulation and anti-icing properties of the coatings treated in Comparative Examples 1-3 were lower than those in Examples 1-3, which illustrates the importance of fillers. Zeolite in the additives is a natural aluminosilicate mineral, which is itself an excellent insulator. The silane coupling agent KH550 coats the zeolite and carbon black particles, eliminating interfacial gaps and preventing partial discharge. The reaction product of tannic acid and ferric chloride further tightly encapsulates the carbon black, preventing the formation of conductive paths. Therefore, the insulation performance of Comparative Example 2, which lacks additives, is slightly reduced. The main component of rice husk ash in the additives is silicon dioxide, which is a natural and good insulating material. Moreover, the porous carbon in the additives can chemically adsorb with epoxy resin, enhancing interfacial compatibility. Therefore, the insulation performance of Comparative Example 3, which lacks additives, is also slightly reduced. At the same time, paraffin and stearic acid can uniformly coat the powder particles, blocking the migration of charge from the filler to the resin matrix and filling the micro-gaps between particles, thus improving the overall insulation of the coating. The composite of chitosan and sodium tripolyphosphate enhances the interfacial bonding between the filler and epoxy resin. The restriction of thermal motion of matter and the reduction of free volume increase the volume resistivity. Therefore, the insulation performance of Comparative Example 1, which lacks the entire filler, is significantly reduced. Regarding the anti-icing performance, the paraffin and stearic acid in the filler are mixed with the powder at high temperature under negative pressure. This allows these hydrophobic molecules to uniformly coat the surface of each powder particle through physical adsorption and chemical bonding, forming a wax-like surface. Water droplets are difficult to spread and appear spherical, thus reducing the solid-liquid contact area. At the same time, the latent heat absorbed by the solid-liquid phase transition near the freezing point of paraffin interferes with the densification of ice crystals, making the ice layer structure loose and easy to detach. This not only delays the freezing initiation time but also reduces the shear adhesion between ice and the coating. The porous structure of zeolite traps air to form a heat insulation layer, delaying surface cooling. The carbon black in the additives and the activated rice husk ash and corn cob in the auxiliaries have photothermal conversion capabilities. Under natural light, the surface temperature of the coating is slightly higher than that of the environment, actively weakening the adhesion of the ice layer. Therefore, the anti-icing performance of Comparative Examples 1, 2, and 3 is reduced.

[0046] By comparing and analyzing the relevant data in the table, it can be seen that the anti-icing insulating coating of this invention not only has good anti-icing performance but also excellent insulation performance. This indicates that the anti-icing insulating coating provided by this invention has a broader market prospect and is more suitable for widespread application.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An anti-icing insulating coating, characterized in that, The raw materials include the following parts by weight: 100 parts epoxy resin, 25-35 parts filler, 6-8 parts curing agent, 10-15 parts diluent and 1-1.5 parts defoamer; The raw materials for the filler include powder, paraffin wax, stearic acid, chitosan, acetic acid solution, and sodium tripolyphosphate solution; The raw materials for the powder include additives, tannic acid, deionized water, ferric chloride, auxiliaries, and polyethylene glycol.

2. The anti-icing insulating coating according to claim 1, characterized in that, The filler is prepared by the following method: Step 1: Mix the powder, paraffin wax, and stearic acid at 80-90℃ and -0.1MPa for 2 hours to obtain the first mixture; Step 2: Mix chitosan with a 3-4% (w / w) acetic acid solution and stir at 200-300 rpm for 30-40 minutes to obtain a second mixture; Step 3: Add the first mixture to the second mixture and stir for 1-2 hours at 50-60℃ and 300-400rpm. Add a sodium tripolyphosphate solution with a mass concentration of 2-4% and continue stirring for 1-2 hours. Filter, take the first solid product, wash, vacuum dry at 80℃ for 8-10 hours, pulverize and pass through a 300-400 mesh sieve to obtain the filler.

3. The anti-icing insulating coating according to claim 2, characterized in that, The mass ratio of the first mixture of powder, paraffin and stearic acid is 1:(0.6-0.7):(0.08-0.12), the mass ratio of the second mixture of chitosan and acetic acid solution is 1:10, and the mass ratio of the first mixture, the second mixture and sodium tripolyphosphate solution is 1:(4-6):(1-2).

4. The anti-icing insulating coating according to claim 1, characterized in that, The powder is prepared by the following method: the additives, tannic acid and deionized water are mixed and stirred at 40-50℃ and 200-300rpm for 1-2 hours. Ferric chloride is added and stirring is continued for 40-60 minutes. The auxiliary agent and polyethylene glycol are added and mixed at 40-60℃ and 200-300rpm for 20-30 minutes. The mixture is filtered, the second solid product is taken, washed, dried at 60℃ for 10-12 hours, pulverized, and passed through a 100-200 mesh sieve to obtain the powder.

5. The anti-icing insulating coating according to claim 4, characterized in that, The mass ratio of the additives, tannic acid, deionized water, ferric chloride, auxiliaries, and polyethylene glycol is 1:(0.18-0.22):(12-18):(0.03-0.05):(0.28-0.32):(0.1-0.2).

6. The anti-icing insulating coating according to claim 1, characterized in that, The additive is prepared by the following method: zeolite, carbon black, and silane coupling agent KH550 are mixed and stirred at 70°C and 200-400 rpm for 1-2 hours. Hexadecyltrimethylammonium bromide and deionized water are added and stirring is continued for 4-6 hours. The mixture is filtered, and the third solid product is taken, washed, and dried in an oven at 105°C for 8 hours to obtain the additive. The mass ratio of zeolite, carbon black, and silane coupling agent KH550 is 1:(0.02-0.04):(0.02-0.04), the mass of hexadecyltrimethylammonium bromide is 35-45% of the mass of zeolite, and the mass of deionized water is 6-8 times that of zeolite.

7. The anti-icing insulating coating according to claim 1, characterized in that, The auxiliary agent is prepared by the following method: Step A: Mix rice husk ash and sodium hydroxide solution, stir for 3 hours at 60-80℃ and 200-400rpm, filter, take the fourth solid product, wash, and dry at 105℃ for 6 hours to obtain the coarse material; Step B: Crush corn cobs through a 100-mesh sieve to obtain corn cob powder. Mix the corn cob powder with zinc chloride solution and mix at 100-200 rpm for 10-12 hours. Filter and take the fifth solid product. Wash and dry in a 100℃ oven for 8 hours. Then, under nitrogen protection, heat to 500-600℃ at 5℃ / min and hold for 2-3 hours. Cool to obtain the cooled product. Add coarse material and anhydrous ethanol and sonicate at 40-60℃, 40-60kHz, and 200-300W for 40 minutes. Filter and take the sixth solid product. Dry at 70-80℃ for 10 hours to obtain the additive.

8. The anti-icing insulating coating according to claim 7, characterized in that, The mass ratio of rice husk ash to sodium hydroxide solution is 1:(3-5), the mass concentration of sodium hydroxide solution is 20-30%, the mass ratio of corn cob powder to zinc chloride solution is 1:3, the mass concentration of zinc chloride solution is 30%, and the mass ratio of cooling product, coarse material and anhydrous ethanol is (0.8-1):1:

6.

9. The anti-icing insulating coating according to claim 1, characterized in that, The epoxy resin is epoxy resin E-51, the defoamer is silicone defoamer BYK-088, the diluent is butyl glycidyl ether, and the curing agent is polyamide 650 curing agent.

10. The method for preparing the anti-icing insulating coating according to any one of claims 1-9, characterized in that, The process includes the following steps: Weigh epoxy resin, filler, diluent and defoamer as needed and add them to the reactor. Set the temperature to 40-60℃, the stirring speed to 400-500 rpm, and stir for 30-40 minutes. Then add the curing agent and continue stirring for 10-15 minutes to obtain the anti-icing insulating coating.

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