A superhydrophobic thermal insulating slurry material and its preparation method

Abstract

This invention relates to a superhydrophobic thermal insulating slurry material and its preparation method, applicable to the field of slurry preparation. The superhydrophobic thermal insulating slurry prepared by this invention not only has excellent low thermal conductivity but also high porosity, low apparent density, and high hydrophobicity. This invention uses fluorinated acrylic resin as a binder, which not only reduces the slurry's moisture absorption but also improves its thermal insulation effect. This solves the problem that ordinary organic binders can cause the coating's insulation effect to be damaged by moisture adsorption, thereby extending the coating's service life. In addition, the addition of a superhydrophobic particle dispersion to the slurry system enhances the hydrophobic effect of the coating surface, reducing the possibility of water droplets adhering to the coating surface. This allows the pipe surface to remain dry for a long time, thus solving the problems of condensation and dripping on the pipe surface and accelerated corrosion caused by the pipe being in a humid environment for a long time.

Description

Technical Field

[0001] This invention relates to a preparation method, and more particularly to a superhydrophobic thermal insulation slurry material and its preparation method for use in the field of slurry preparation. Background Technology

[0002] With industrial progress and development, the problem of condensation on the surface of water supply pipelines in large industrial equipment has become increasingly prominent. Especially in humid southern regions, the condensation of moisture in the air not only causes severe dripping from the pipeline surface but also exacerbates pipeline corrosion. Currently, traditional insulation materials such as foam, sponge, and epoxy resin are widely used on pipelines. While these can temporarily solve the dripping problem, in the long run, water droplets will accumulate between the inner wall of the traditional insulation material and the pipeline, further aggravating corrosion. Neither the anti-drip nor anti-corrosion effects meet the required standards.

[0003] The patent application with application number CN202011226902.9 discloses a method for preparing and applying a hydrophobic aerogel aqueous slurry. The method uses a surfactant to disperse hydrophobic aerogel powder in water, and then adds an organic binder and related additives to prepare the aerogel aqueous slurry.

[0004] In the aforementioned patents, the resulting water-based slurry uses common organic binders, such as vinyl alcohol, water-based acrylates, and water-based polyurethane. Because common organic binders have a certain degree of hydrophilicity, they easily adsorb water vapor in the formed aerogel structure. This prevents the moisture absorption performance of the prepared aerogel slurry coating from being improved, resulting in reduced thermal insulation performance and ultimately failing to meet the application requirements. Therefore, we propose a superhydrophobic thermal insulating water-based slurry material and its preparation method. Summary of the Invention

[0005] The technical problem to be solved by the present invention in view of the above-mentioned prior art is that: existing water-based slurries, due to the use of common organic binders, easily adsorb water vapor in the formed aerogel structure, which makes it impossible to improve the moisture absorption performance of the prepared aerogel slurry coating, thereby reducing the heat insulation performance.

[0006] To address the above problems, this invention provides a method for preparing a superhydrophobic thermal insulating slurry material, comprising the following steps:

[0007] S1. By weight, add 0.1 parts of multifunctional additive, 0.6 parts of dispersant, 0.6 parts of defoamer, 20 parts of water, 0.01 parts of antibacterial agent, 4 parts of titanium dioxide, 2.3 parts of mica powder, 3 parts of heavy calcium carbonate, 19 parts of B, 8 parts of ceramic hollow microspheres, 37 parts of A, 5 parts of C, 121 parts of alcohol ester, and 1 part of ethylene glycol into the reactor in sequence, and stir at 1500 r / min for 3 hours to obtain a superhydrophobic thermal insulating slurry.

[0008] A is a hydrophobic fluorinated acrylic resin, B is an aerogel suspension, and C is a superhydrophobic particle dispersion.

[0009] In the above-mentioned preparation method of superhydrophobic thermal insulation slurry, fluorinated acrylic resin is used as a binder, which can not only reduce the moisture absorption of the slurry, but also improve the thermal insulation effect of the slurry, thus solving the problem that the thermal insulation effect of the coating is damaged due to the adsorption of water vapor by ordinary organic binders.

[0010] As a further improvement to this application, the preparation method of A includes the following steps:

[0011] A1. Add 1 part sodium dodecyl sulfate, 0.5 parts AEO-9 and 10 parts deionized water to the reaction vessel and react at 45°C. Slowly add 10 parts butyl acrylate and 1 part acrylic acid to the reaction vessel within 30-35 minutes. Then stir at 500 r / min for 15 minutes to obtain an emulsion.

[0012] A2. Add 0.3 parts sodium bicarbonate, 0.2 parts ammonium persulfate, 20 parts water, 0.4 parts sodium dodecyl sulfate, and 10 parts butyl acrylate to the reaction vessel. Heat to 80°C and stir at a constant speed. After the blue light phenomenon appears, gradually add 10 parts ethyl methacrylate, 11 parts butyl acrylate, 1 part tridefluorooctyl methacrylate, and 1 part KH-570 to the reaction vessel over 2 to 3 hours. Then stir at 200 r / min for 15 minutes, and add 1 part ammonium persulfate to the reaction vessel during the stirring process to obtain the seed solution.

[0013] A3. Cool the seed solution obtained in step A2 to 50°C, and add one-third of the emulsion obtained in step A1 to the seed solution. Let it swell for 15 minutes, then raise the temperature to 80°C. Gradually add the remaining emulsion dropwise over 1 hour. After the addition is complete, keep the temperature for 30 minutes, then raise the temperature to 95°C and react for 15 minutes. Then lower the temperature to below 40°C and adjust the pH to 7-8 with ammonia. After the reaction is complete, filter to obtain the hydrophobic fluorinated acrylic resin, which is A.

[0014] As a further improvement to this application, the preparation method of B includes the following steps:

[0015] B1. Add 70 parts of deionized water and 3 parts of dispersing and wetting agent to the reactor, stir at 1500 r / min for 10 min, reduce the speed to 400 r / min, and slowly add 30 parts of aerogel powder. Stir until the powder is completely wetted, then increase the speed to 1500 r / min and stir for 15 min to obtain the aerogel suspension, which is B.

[0016] As a further improvement to this application, the preparation method of C includes the following steps:

[0017] C1. Add 91.9 parts of anhydrous ethanol and 5 parts of nano-silica to the reaction vessel and stir at 3000 r / min for 1 h.

[0018] C2. Add 2 parts of tridecafluorooctyltriethoxysilane to the reaction vessel in step C1, set the reaction temperature to 60°C, add 0.1 parts of ammonia water, and continue stirring at 3000 r / min for 1.5 h.

[0019] C3. Add 1 part of γ-glycidyl etheroxypropyltrimethoxysilane to the reaction vessel in step C2, and continue stirring at 3000 r / min for 1 hour to obtain the superhydrophobic particle dispersion, namely C.

[0020] As another improvement of this application, in step A3, an intelligent feeding device can be used to add the emulsion to the seed solution. The intelligent feeding device includes a storage tank, with a feeding pipe connected to the top of the storage tank and a discharge pipe connected to the bottom of the storage tank. A control solenoid valve is installed on the discharge pipe, and a connecting cylinder is connected to the bottom of the discharge pipe. A liquid level sensor is fixedly installed on the inner wall of the top of the storage tank.

[0021] As a further improvement to this application, the bottom end of the connecting cylinder is set to be open. The intelligent feeding device also includes a feeding intelligent controller fixedly installed on the outer wall of the storage tank. The feeding intelligent controller is equipped with a touch panel, a feeding control module, and a parameter setting module. The touch panel is electrically connected to the feeding control module and the parameter setting module. The parameter setting module is electrically connected to the feeding control module. The feeding control module is electrically connected to the control solenoid valve and the liquid level sensor.

[0022] As a further improvement to this application, a constant pressure air guide pipe is connected to the side wall of the connecting cylinder. The constant pressure air guide pipe is C-shaped, and the other end of the constant pressure air guide pipe is connected to the inside of the storage tank. A control solenoid valve is installed on the constant pressure air guide pipe. The feeding control module is electrically connected to the control solenoid valve to ensure that the intelligent feeding device can smoothly complete the addition of emulsion.

[0023] As a further improvement to this application, the top of the feeding pipe is connected to a feeding hopper, which makes it convenient for workers to pour the emulsion into the storage tank. The feeding pipe is equipped with a feeding valve. When pouring the emulsion, the feeding valve is opened and closed after pouring is completed, which can reduce the loss of hot air and thus reduce the loss of heat.

[0024] In summary, the superhydrophobic thermal insulating slurry of this application not only possesses excellent low thermal conductivity but also boasts advantages such as high porosity, low apparent density, and high hydrophobicity. Furthermore, it exhibits high-performance thermal insulation, leak-free coating, shape stability, and the ability to be encapsulated in a large area. The slurry uses fluorinated acrylic resin as a binder, which not only reduces the slurry's moisture absorption but also enhances its thermal insulation effect. This solves the problem that ordinary organic binders can cause the coating's insulation performance to be compromised due to moisture absorption, thereby extending the coating's service life. Additionally, the addition of superhydrophobic material to the slurry system further enhances its performance. The particle dispersion enhances the hydrophobic effect of the coating surface, reducing the possibility of water droplets adhering to the coating surface. This allows the pipe surface to remain dry for a long time, thus solving the problems of condensation and dripping on the pipe surface and accelerated corrosion caused by the pipe being in a humid environment for a long time. With the setting of the intelligent feeding device, when preparing hydrophobic fluorinated acrylic resin, the intelligent feeding device can automatically and accurately add the emulsion to the seed solution as required, eliminating the need for manual measurement and addition. This saves workers a lot of troublesome operations, not only saving manpower and improving efficiency, but also improving the accuracy of material addition, thereby improving production quality. Attached Figure Description

[0025] Figure 1 This is a process flow diagram of the preparation method of the superhydrophobic thermal insulating slurry in the first embodiment of this application;

[0026] Figure 2 This is a process flow diagram for preparing hydrophobic fluorinated acrylic resin in the first embodiment of this application;

[0027] Figure 3 This is a process flow diagram for preparing the aerogel suspension in the first embodiment of this application;

[0028] Figure 4 This is a process flow diagram for preparing the superhydrophobic particle dispersion in the first embodiment of this application;

[0029] Figure 5 This is a three-dimensional structural diagram of the intelligent feeding device in the second embodiment of this application;

[0030] Figure 6 This is a front view structural diagram of the intelligent feeding device in the second embodiment of this application;

[0031] Figure 7 This is a cross-sectional view of the storage bin in the second embodiment of this application;

[0032] Figure 8 This is a cross-sectional view of the connecting cylinder in the second embodiment of this application;

[0033] Figure 9 This is a system structure block diagram of the feeding intelligent controller in the second embodiment of this application.

[0034] Explanation of the labels in the diagram:

[0035] 101. Storage tank; 102. Feeding pipe; 103. Discharge pipe; 104. Control solenoid valve; 105. Connecting cylinder; 106. Liquid level sensor; 107. Constant pressure air guide pipe; 108. Control solenoid valve; 109. Feeding hopper; 110. Feed valve; 002. Feeding controller. Detailed Implementation

[0036] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0037] First implementation method:

[0038] Example 1

[0039] A superhydrophobic thermal insulating slurry material, the raw materials of which contain the following components by weight: 0.1 parts multifunctional additive, 0.6 parts dispersant, 0.6 parts defoamer, 20 parts water, 0.01 parts antibacterial agent, 4 parts titanium dioxide, 2.3 parts mica powder, 3 parts heavy calcium carbonate, 19 parts B, 8 parts ceramic hollow microspheres, 37 parts A, 5 parts C, 121 parts alcohol ester, and 1 part ethylene glycol.

[0040] Figure 1-4 A method for preparing a superhydrophobic thermal insulating slurry material is shown, comprising the following steps:

[0041] Step 1: Preparation of hydrophobic fluorinated acrylic resin:

[0042] A1. Add 1 part sodium dodecyl sulfate, 0.5 parts AEO-9 and 10 parts deionized water to the reaction vessel and react at 45°C. Slowly add 10 parts butyl acrylate and 1 part acrylic acid to the reaction vessel within 30-35 minutes. Then stir at 500 r / min for 15 minutes to obtain an emulsion.

[0043] A2. Add 0.3 parts sodium bicarbonate, 0.2 parts ammonium persulfate, 20 parts water, 0.4 parts sodium dodecyl sulfate, and 10 parts butyl acrylate to the reaction vessel. Heat to 80°C and stir at a constant speed. After the blue light phenomenon appears, gradually add 10 parts ethyl methacrylate, 11 parts butyl acrylate, 1 part tridefluorooctyl methacrylate, and 1 part KH-570 to the reaction vessel over 2 to 3 hours. Then stir at 200 r / min for 15 minutes, and add 1 part ammonium persulfate to the reaction vessel during the stirring process to obtain the seed solution.

[0044] A3. Cool the seed solution obtained in step A2 to 50°C, and add one-third of the emulsion obtained in step A1 to the seed solution (the seed solution is in the reaction vessel). Let it swell for 15 minutes, then raise the temperature to 80°C. Gradually add the remaining emulsion dropwise over 1 hour. After the addition is complete, keep the temperature for 30 minutes, then raise the temperature to 95°C and react for 15 minutes. Then lower the temperature to below 40°C, adjust the pH to 7-8 with ammonia, and filter after the reaction is complete to obtain the hydrophobic fluorinated acrylic resin, denoted as A.

[0045] Step 2: Preparation of aerogel suspension:

[0046] B1. Add 70 parts of deionized water and 3 parts of dispersing and wetting agent to the reactor, stir at 1500 r / min for 10 min, reduce the speed to 400 r / min, and slowly add 30 parts of aerogel powder. Stir until the powder is completely wetted, then increase the speed to 1500 r / min and stir for 15 min to obtain an aerogel suspension, denoted as B.

[0047] Step 3: Preparation of superhydrophobic particle dispersion:

[0048] C1. Add 91.9 parts of anhydrous ethanol and 5 parts of nano-silica to the reaction vessel and stir at 3000 r / min for 1 h.

[0049] C2. Add 2 parts of tridecafluorooctyltriethoxysilane to the reaction vessel in step C1, set the reaction temperature to 60°C, add 0.1 parts of ammonia water, and continue stirring at 3000 r / min for 1.5 h.

[0050] C3. Add 1 part of γ-glycidyl etheroxypropyltrimethoxysilane to the reaction vessel in step C2, and continue stirring at 3000 r / min for 1 h to obtain a superhydrophobic particle dispersion, denoted as C.

[0051] Step 4: Preparation of superhydrophobic thermal insulating slurry:

[0052] S1. By weight, add 0.1 parts of multifunctional additive, 0.6 parts of dispersant, 0.6 parts of defoamer, 20 parts of water, 0.01 parts of antibacterial agent, 4 parts of titanium dioxide, 2.3 parts of mica powder, 3 parts of heavy calcium carbonate, 19 parts of B, 8 parts of ceramic hollow microspheres, 37 parts of A, 5 parts of C, 121 parts of alcohol ester, and 1 part of ethylene glycol into the reactor in sequence, and stir at 1500 r / min for 3 hours to obtain a superhydrophobic thermal insulating slurry.

[0053] The superhydrophobic thermal insulating slurry of this application not only possesses excellent low thermal conductivity but also boasts advantages such as high porosity, low apparent density, and high hydrophobicity. Furthermore, it exhibits high-performance thermal insulation, leak-free coating, shape stability, and the ability to be encapsulated in a large area. The slurry uses fluorinated acrylic resin as a binder, which not only reduces the slurry's moisture absorption but also enhances its thermal insulation effect. This solves the problem that ordinary organic binders can damage the coating's insulation performance due to moisture absorption, thus extending the coating's service life. Additionally, the addition of a superhydrophobic particle dispersion to the slurry system enhances the hydrophobic effect of the coating surface, reducing the possibility of water droplets adhering to the coating surface. This allows the pipe surface to remain dry for extended periods, thereby resolving the problems of condensation and dripping on the pipe surface and accelerated corrosion caused by prolonged exposure to a humid environment.

[0054] Comparative Example 1

[0055] The rest is the same as in Example 1, except that in step S1, 37 parts of A are replaced with 37 parts of commercially available pure acrylic emulsion (Sanmu FA120).

[0056] Comparative Example 2

[0057] The rest is the same as in Example 1, except that in step S1, 20 parts of water are changed to 25 parts of water, and 5 parts of C are not added.

[0058] The performance of the slurries prepared in Example 1, Comparative Example 1, and Comparative Example 2 was tested, and the results are shown in Table 1.

[0059] Table 1

[0060]

[0061] The test method for anti-condensation test 1 is as follows: The slurry is scraped onto the outer wall of the hollow steel pipe, and the dry film thickness is uniformly set to 3mm. After the coating is completely dry and forms a coating, an ice-water mixture is filled into the steel pipe, and the temperature inside the steel pipe is adjusted to 5-7℃. Then the steel pipe is sealed, and the room temperature is adjusted to 20-25℃ so that there is a temperature difference of about 15-18℃ between the temperature inside the steel pipe and the ambient temperature. The relative humidity of the environment is adjusted to 80%, and then it is observed whether there is condensation on the outer wall of the steel pipe.

[0062] The method for anti-condensation test 2 is as follows: Apply the slurry to the outer wall of the hollow steel pipe, and set the dry film thickness to 3mm. After the coating is completely dry and forms a coating, immerse the steel pipe in water for 72 hours. Take out the steel pipe and place it indoors naturally for 2 hours. Fill the steel pipe with an ice-water mixture and adjust the temperature inside the steel pipe to 5-7℃. Then seal the steel pipe and adjust the room temperature to 20-25℃ to make a temperature difference of about 15-18℃ between the temperature inside the steel pipe and the ambient temperature. Adjust the relative humidity of the environment to 80%, and then observe whether there is condensation on the outer wall of the steel pipe.

[0063] As can be seen from the data in Table 1, the performance of the superhydrophobic thermal insulating slurry prepared in Example 1 of this application with fluorinated acrylic resin as binder is significantly better than the performance of the superhydrophobic thermal insulating slurry prepared in Comparative Example 1 with pure acrylate as binder. Furthermore, the performance of the superhydrophobic thermal insulating slurry prepared in Example 1 of this application with added superhydrophobic particle dispersion is significantly better than the performance of the superhydrophobic thermal insulating slurry prepared in Comparative Example 2 without added superhydrophobic particle dispersion.

[0064] Second implementation method:

[0065] The difference between this embodiment and the first embodiment is that in step A3, when the emulsion is added to the seed solution, the emulsion is added through an intelligent feeding device.

[0066] Please see Figure 5-9 The intelligent feeding device includes a storage tank 101, with a feeding pipe 102 connected to the top of the storage tank 101 and a discharge pipe 103 connected to the bottom of the storage tank 101. A control solenoid valve 104 is installed on the discharge pipe 103, and a connecting cylinder 105 is connected to the bottom of the discharge pipe 103. A liquid level sensor 106 is fixedly installed on the inner wall of the top of the storage tank 101, and the bottom of the connecting cylinder 105 is open. The intelligent feeding device also includes a feeding intelligent controller 002 fixedly installed on the outer wall of the storage tank 101. The feeding intelligent controller 002 is equipped with a touch panel, a feeding control module, and a parameter setting module. The touch panel is electrically connected to the feeding control module and the parameter setting module. The parameter setting module is electrically connected to the feeding control module. The feeding control module is electrically connected to the control solenoid valve 104 and the liquid level sensor 106.

[0067] Please see Figure 5-9The touch panel and parameter setting module allow users to set parameters such as the first feeding ratio, feeding interval, and second feeding drip duration. Connecting the connecting cylinder 105 to the feed pipe of the reactor, the material is poured into the storage tank 101 through the feeding pipe 102. Then, a feeding command is sent to the feeding control module via the touch panel. Upon receiving the command, the feeding control module first activates the liquid level sensor 106 to measure the liquid level in the storage tank 101. The measurement result from the liquid level sensor 106 is fed back to the feeding control module, which calculates the volume of the material based on the liquid level and combines this with the previously set parameters. The feeding control module calculates the required drop in liquid level to complete the first feeding. It then opens the control solenoid valve 104 to begin feeding, allowing material to flow into the reactor through the discharge pipe 103 and connecting cylinder 105. Once the liquid level reaches the designated height, the feeding control module automatically closes the control solenoid valve 104 and starts a timer. After the timer reaches the previously set feeding interval, the feeding control module reopens the control solenoid valve 104 and controls its opening degree according to the previously set dripping duration for the second feeding, ensuring the material is slowly dripped into the reactor over the set time. Additionally, during the second feeding... During the process, the feeding control module will also fine-tune the opening degree of the control solenoid valve 104 according to the rate of drop of the material liquid level to avoid the material being added too quickly or too slowly. After the second feeding is completed, the feeding control module will automatically close the control solenoid valve 104 and the liquid level sensor 106. Therefore, in this embodiment, the specific process of step A3 is as follows: connect the connecting cylinder 105 in the intelligent feeding device to the feed pipe of the reactor, pour the emulsion obtained in step A1 into the storage tank 101, set the first feeding ratio to 33.3% (one-third), and set the feeding interval to 25 minutes (15 minutes for swelling plus rising). The seed solution obtained in step A2 is cooled to 50°C. A feeding command is sent to the parameter setting module via the touch panel, causing the intelligent feeding device to automatically add one-third of the emulsion to the seed solution. The solution swells for 15 minutes, then the temperature is raised to 80°C. The intelligent feeding device will then automatically add the remaining emulsion gradually over 1 hour. After the emulsion is added, the temperature is maintained for 30 minutes, then the temperature is raised to 95°C and reacted for 15 minutes. The temperature is then lowered to below 40°C, and the pH is adjusted to 7-8 with ammonia. After the reaction is completed, the solution is filtered to obtain the hydrophobic fluorinated acrylic resin.

[0068] The intelligent feeding device is a supporting equipment designed specifically for the preparation method of the superhydrophobic thermal insulating slurry in this invention. With the setting of the intelligent feeding device, when preparing hydrophobic fluorinated acrylic resin, the intelligent feeding device can automatically and accurately add the emulsion to the seed solution as required, without the need for manual measurement and addition. This can save workers a lot of troublesome operations, not only saving manpower and improving efficiency, but also improving the accuracy of material addition, thereby improving production quality.

[0069] Please see Figure 5-9 A constant pressure gas guide pipe 107 is connected to the side wall of the connecting cylinder 105. The constant pressure gas guide pipe 107 is C-shaped, and its other end is connected to the inside of the storage tank 101. A control solenoid valve 108 is installed on the constant pressure gas guide pipe 107. The feeding control module is electrically connected to the control solenoid valve 108. Before the feeding control module opens the control solenoid valve 104 to feed, it will first open the control solenoid valve 108 so that the reactor can be connected to the storage tank 101 through the constant pressure gas guide pipe 107, thereby achieving a pressure balance. This facilitates the downward flow of the emulsion, ensuring that the intelligent feeding device can smoothly add the emulsion. In addition, after feeding is completed, the feeding control module will automatically close the control solenoid valve 108 to reduce heat loss. The top of the feeding pipe 102 is connected to the feeding hopper 109, making it easy for the operator to pour the emulsion into the storage tank 101. The feeding pipe 102 is equipped with a feed valve 110. When pouring the emulsion, the feed valve 110 is opened, and the feed valve 110 is closed after pouring is completed, which can reduce the loss of hot air and thus reduce heat loss.

[0070] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A method for preparing a superhydrophobic thermal insulating slurry material, characterized in that, Includes the following steps: S1. By weight, add 0.1 parts of multifunctional additive, 0.6 parts of dispersant, 0.6 parts of defoamer, 20 parts of water, 0.01 parts of antibacterial agent, 4 parts of titanium dioxide, 2.3 parts of mica powder, 3 parts of heavy calcium carbonate, 19 parts of B, 8 parts of ceramic hollow microspheres, 37 parts of A, 5 parts of C, 121 parts of alcohol ester, and 1 part of ethylene glycol into the reactor in sequence, and stir at 1500 r / min for 3 hours to obtain a superhydrophobic thermal insulating slurry. A is a hydrophobic fluorinated acrylic resin, B is an aerogel suspension, and C is a superhydrophobic particle dispersion; the preparation method of A includes the following steps: A1. Add 1 part sodium dodecyl sulfate, 0.5 parts AEO-9 and 10 parts deionized water to the reaction vessel and react at 45°C. Slowly add 10 parts butyl acrylate and 1 part acrylic acid to the reaction vessel within 30-35 minutes. Then stir at 500 r / min for 15 minutes to obtain an emulsion. A2. Add 0.3 parts sodium bicarbonate, 0.2 parts ammonium persulfate, 20 parts water, 0.4 parts sodium dodecyl sulfate, and 10 parts butyl acrylate to the reaction vessel. Heat to 80°C and stir at a constant speed. After the blue light phenomenon appears, gradually add 10 parts ethyl methacrylate, 11 parts butyl acrylate, 1 part tridefluorooctyl methacrylate, and 1 part KH-570 to the reaction vessel over 2 to 3 hours. Then stir at 200 r / min for 15 minutes, and add 1 part ammonium persulfate to the reaction vessel during the stirring process to obtain the seed solution. A3. Cool the seed solution obtained in step A2 to 50°C, and add part of the emulsion obtained in step A1 to the seed solution. Let it swell for 15 minutes, then raise the temperature to 80°C. Gradually add the remaining emulsion dropwise over 1 hour. After the addition is complete, keep the temperature for 30 minutes, then raise the temperature to 95°C and react for 15 minutes. Then lower the temperature to below 40°C, adjust the pH to 7-8 with ammonia, and filter after the reaction is complete to obtain the hydrophobic fluorinated acrylic resin, which is A. In step A3, when the emulsion is added for the first time, the amount of emulsion added is one-third of the total amount; The preparation method of B includes the following steps: B1. Add 70 parts of deionized water and 3 parts of dispersing and wetting agent to the reaction vessel, stir at 1500 r / min for 10 min, reduce the speed to 400 r / min, and slowly add 30 parts of aerogel powder, stir until the powder is completely wetted, then increase the speed to 1500 r / min and stir for 15 min to obtain the aerogel suspension, which is B. The preparation method of C includes the following steps: C1. Add 91.9 parts of anhydrous ethanol and 5 parts of nano-silica to the reaction vessel and stir at 3000 r / min for 1 h. C2. Add 2 parts of tridecafluorooctyltriethoxysilane to the reaction vessel in step C1, set the reaction temperature to 60°C, add 0.1 parts of ammonia water, and continue stirring at 3000 r / min for 1.5 h. C3. Add 1 part of γ-glycidyl etheroxypropyltrimethoxysilane to the reaction vessel in step C2, and continue stirring at 3000 r / min for 1 h to obtain the superhydrophobic particle dispersion, which is C.

2. The method for preparing a superhydrophobic thermal insulating slurry material according to claim 1, characterized in that, In step A3, an intelligent feeding device is used to add the emulsion to the seed solution. The intelligent feeding device includes a storage tank (101), the top of which is connected to a feeding pipe (102), the bottom of which is connected to a discharge pipe (103), a control solenoid valve (104) is provided on the discharge pipe (103), the bottom of which is connected to a connecting cylinder (105), and a liquid level sensor (106) is fixedly installed on the inner wall of the top of the storage tank (101).

3. The method for preparing a superhydrophobic thermal insulating slurry material according to claim 2, characterized in that, The bottom end of the connecting cylinder (105) is set to be open. The intelligent feeding device also includes a feeding intelligent controller (002) fixedly installed on the outer wall of the storage tank (101). The feeding intelligent controller (002) is provided with a touch panel, a feeding control module, and a parameter setting module. The touch panel is electrically connected to the feeding control module and the parameter setting module. The parameter setting module is electrically connected to the feeding control module. The feeding control module is electrically connected to the control solenoid valve (104) and the liquid level sensor (106).

4. The method for preparing a superhydrophobic thermal insulating slurry material according to claim 3, characterized in that, A constant pressure air guide pipe (107) is connected to the side wall of the connecting cylinder (105). The constant pressure air guide pipe (107) is C-shaped. The other end of the constant pressure air guide pipe (107) is connected to the inside of the storage tank (101). A control solenoid valve (108) is provided on the constant pressure air guide pipe (107). The feeding control module is electrically connected to the control solenoid valve (108).

5. The method for preparing a superhydrophobic thermal insulating slurry material according to claim 4, characterized in that, The top end of the feeding pipe (102) is connected to the feeding hopper (109), and the feeding pipe (102) is equipped with a feeding valve (110).

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