Preparation device of self-assembled mesoporous carbon precursor material membrane

Abstract

The utility model provides a preparation device of a self-assembled mesoporous carbon precursor material film. The preparation device comprises a slurry placement unit, an evaporation unit, a solvent recovery unit, a curing unit and a continuous conveyor belt, the slurry placing unit is positioned above the conveying surface of the continuous conveying belt and is used for storing evaporation self-assembly slurry of the mesoporous carbon precursor and coating the evaporation self-assembly slurry to the conveying surface of the continuous conveying belt; the continuous conveyor belt is sequentially connected with the evaporation unit and the curing unit; the evaporation unit is used for carrying out solvent evaporation on the coating film conveyed by the continuous conveying belt to obtain a soft film; the solvent recovery unit is used for recovering the solvent evaporated from the evaporation unit; and the curing unit is used for curing the soft film obtained by the evaporation unit to obtain the self-assembled mesoporous carbon precursor material film. The preparation device provided by the utility model can realize expanded production of the mesoporous carbon material prepared by the EISA method, can effectively recover the solvent in the mesoporous carbon material, avoids waste of preparation raw materials, and reduces the preparation cost.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of mesoporous carbon material preparation, and relates to a preparation device of self-assembled mesoporous carbon precursor material film. BACKGROUND

[0002] Ordered mesoporous carbon materials have shown wide application prospects in many fields such as catalysis, energy storage and conversion, gas adsorption and separation, and biomedical treatment due to their unique physical and chemical properties. The pore size of such materials is usually between 2-50 nanometers, and they have highly ordered pore structure, large specific surface area, and good thermal stability and chemical stability. These characteristics not only promote efficient transmission of substances, but also provide more anchoring sites for active components, thereby significantly improving performance in related applications.

[0003] Currently, the preparation methods of ordered mesoporous carbon materials mainly include hard template method and soft template method. The hard template method uses inorganic oxides such as silica as templates to accurately control the size and shape of the pores, but this process often requires complex synthesis steps and expensive template removal process, which limits its application in large-scale production. In contrast, the soft template method uses micelles formed by surfactants or polymers as templates to directly synthesize mesoporous materials with highly ordered structure under mild conditions, and to convert them into mesoporous carbon materials in subsequent high-temperature treatment process. This method is simple to operate and easy to control the pore size distribution and morphology of the material, so it is considered as a more ideal synthesis strategy.

[0004] However, although the ordered mesoporous carbon materials prepared by the soft template method have shown many advantages in laboratory research, their application on an industrial scale still faces some challenges. First, the reaction conditions of the soft template method have a great impact on the quality of the final product, such as changes in temperature, pH value, etc. These factors can lead to inconsistencies in the material structure, so the magnification effect is difficult to overcome, which has prevented the soft template method from being scaled up. Second, the surfactants used in the soft template method are expensive, and if they are not recycled, the cost of the product will be high.

[0005] In common soft template methods, the hydrothermal method has been unable to expand to 2m 3The above industrial synthesis kettle level. And evaporation induced self-assembly method (EISA) generally need to be coated to the plate on the evaporation of the precursor, the precursor after scraping down further processing, which makes EISA method has the hope of continuous production by continuous coating machine. However, the liquid raw material used in EISA method is usually solid in about 3%, which makes the raw material viscosity low, unable to adhere to the film; At the same time, low solid content also makes the raw material even if can adhere to the film, the film thickness that can be obtained after drying will be too thin, so that the film is difficult to demould. Further, too low solid content will also lead to a large amount of solvent needs to be evaporated, greatly increasing the energy consumption and material cost of the production process.

[0006] Therefore, how to realize the large-scale production of EISA method for preparing mesoporous carbon material, and reduce the preparation cost, is a technical problem to be solved. Practical new type content

[0007] In view of the deficiencies in the prior art, the purpose of the present application is to provide a preparation device for self-assembled mesoporous carbon precursor material film. The preparation device provided by the present application can realize the large-scale production of EISA method for preparing mesoporous carbon material, and can also effectively recover the solvent therein, avoid waste of preparation raw materials, and reduce the preparation cost.

[0008] In order to achieve this purpose, the present application adopts the following technical solutions:

[0009] The present application provides a preparation device for self-assembled mesoporous carbon precursor material film, which comprises:

[0010] Slurry placing unit, evaporation unit, solvent recovery unit, solidification unit and continuous conveyor belt;

[0011] The slurry placing unit is located above the transmission surface of the continuous conveyor belt, and is used for storing the evaporation self-assembly slurry of mesoporous carbon precursor and coating the evaporation self-assembly slurry of mesoporous carbon precursor to the transmission surface of the continuous conveyor belt;

[0012] The continuous conveyor belt is connected with the evaporation unit and the solidification unit in sequence;

[0013] The evaporation unit is used for evaporating the solvent of the coated film transmitted by the continuous conveyor belt, to obtain a soft film;

[0014] The solvent recovery unit is used for recovering the solvent evaporated in the evaporation unit;

[0015] The solidification unit is used for solidifying the soft film obtained by the evaporation unit to obtain a self-assembled mesoporous carbon precursor material film.

[0016] The preparation device is suitable for evaporation self-assembly slurry of mesoporous carbon precursor with high viscosity and high solid content, can quickly form a film, continuously produces, and the obtained self-assembly mesoporous carbon precursor material film is convenient to demold; the preparation device is not limited in size, and can be adaptively selected and adjusted according to actual needs, so that the problem that mesoporous carbon material cannot be prepared by EISA method and expanded industrial production is expected to be solved, and the preparation device also has a solvent recovery unit, and the preparation cost is reduced.

[0017] The following is a preferred technical scheme of the utility model, but is not a limitation on the technical scheme provided by the utility model, and through the following preferred technical scheme, the technical purpose and beneficial effect of the utility model can be better achieved and implemented.

[0018] As a preferred technical scheme in the utility model, the slurry placing unit comprises a stock bin, and the stock bin coats the evaporation self-assembly slurry of the mesoporous carbon precursor to the conveying surface of the continuous conveying belt through a stock bin discharge port.

[0019] As a preferred technical scheme in the utility model, the vertical distance between the stock bin discharge port and the conveying surface of the continuous conveying belt is 0-5 cm and does not include 0 cm, for example, 0.1 cm, 0.5 cm, 1 cm, 1.5 cm, 2 cm, 2.5 cm, 3 cm, 3.5 cm, 4 cm, 4.5 cm or 5 cm, but is not limited to the listed values, and other values not listed in the value range are also applicable.

[0020] In the utility model, by controlling the vertical distance between the stock bin discharge port and the conveying surface of the continuous conveying belt to be 0-5 cm and not including 0 cm, the thickness of the film obtained by coating can be better controlled, the film demolding is more convenient, the yield is higher, and the cost is relatively lower.

[0021] As a preferred technical scheme in the utility model, the vertical distance between the solvent recovery unit and the evaporation unit is 0-2 cm and does not include 0 cm, for example, 0.1 cm, 0.5 cm, 1 cm, 1.5 cm or 2 cm, but is not limited to the listed values, and other values not listed in the value range are also applicable.

[0022] As a preferred technical scheme in the utility model, the preparation device further comprises a film separation unit, the film separation unit is located at the conveying end of the continuous conveying belt, and the film separation unit is used for separating the self-assembly mesoporous carbon precursor material film obtained by the solidification unit from the continuous conveying belt.

[0023] As a preferred technical scheme in the utility model, the film separation unit comprises a film separation roller, and the film separation roller is located at the conveying end of the continuous conveying belt.

[0024] In the utility model, the membrane layer structure after being treated by the solidification unit changes from a soft membrane into a hard membrane structure, and the rigidity of the obtained hard membrane structure and the continuous conveying belt is different, so that when passing through the membrane separation roller, the solidified hard membrane structure is broken and falls off from the conveying belt, thereby realizing effective separation of the self-assembled mesoporous carbon precursor material membrane obtained by the solidification unit from the continuous conveying belt.

[0025] As a preferred technical scheme in the utility model, the curvature of the membrane separation roller is >100m -1 , such as 110m -1 , 125m -1 , 150m -1 , 175m -1 or 200m -1 , but is not limited to the listed values, and other values not listed in the value range are also applicable.

[0026] In the utility model, the curvature of the membrane separation roller is >100m -1 , which can better utilize the elastic difference between the membrane material and the continuous conveying belt, so that the precursor material membrane automatically warps when passing through the membrane separation roller, thereby realizing effective separation.

[0027] As a preferred technical scheme in the utility model, the membrane separation unit further comprises a membrane scraping device, and the membrane scraping device is used for scraping residual hard membranes on the continuous conveying belt.

[0028] In the utility model, only the self-assembled mesoporous carbon precursor material membrane and the continuous conveying belt are separated by the membrane separation roller, and a part of the membrane layer structure that is difficult to fall off may exist, and the membrane scraping device is further arranged, so that the solidified membrane layer structure and the continuous conveying belt can be completely separated, thereby avoiding waste of raw materials.

[0029] As a preferred technical scheme in the utility model, the shortest linear distance between the membrane scraping device and the conveying surface of the continuous conveying belt is 0-5cm, such as 0cm, 0.5cm, 1cm, 1.5cm, 2cm, 2.5cm, 3cm, 3.5cm, 4cm, 4.5cm or 5cm, but is not limited to the listed values, and other values not listed in the value range are also applicable.

[0030] In the utility model, the shortest linear distance between the membrane scraping device and the conveying surface of the continuous conveying belt is controlled to be 0-5cm, so that the unseparated precursor thin film can be separated without damaging the continuous conveying belt.

[0031] As one preferred technical scheme in the utility model, the preparation device further comprises a material receiving unit, and the material receiving unit is used for receiving the material separated by the membrane separation unit.

[0032] It should be noted that the specific instrument equipment in each unit in the preparation device provided by the utility model is not specially limited in the utility model, and the conventional instrument equipment achieving the corresponding technical effects is applicable.

[0033] For example, the evaporation unit can adopt an evaporation oven for slurry evaporation treatment, the solvent recovery unit can adopt a steam recovery condensing device, and the solidification unit can adopt a heatable solidification device.

[0034] Compared with the prior art, the utility model has the following beneficial effects:

[0035] The preparation device provided by the utility model is suitable for the evaporation self-assembly slurry of the mesoporous carbon precursor with high viscosity and high solid content, can quickly form a film, realizes continuous production, and the self-assembly mesoporous carbon precursor material film obtained simultaneously is convenient to demould; the preparation device provided by the utility model is not limited in size, and can be adaptively selected and adjusted according to actual needs, so as to solve the problem that the EISA method cannot be used for large-scale industrial production of mesoporous carbon materials, and the preparation device has a solvent recovery unit, thereby reducing the preparation cost. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The structure diagram of the preparation device provided in one specific embodiment of the utility model is shown.

[0037] Among them, 1-slurry placing unit, 2-continuous conveyor belt, 3-evaporation unit, 4-solvent recovery unit, 5-solidification unit, 6-membrane separation unit, 61-membrane separation roller, 62-membrane scraping device, 7-material receiving unit. DETAILED DESCRIPTION

[0038] It should be understood that, in the description of the utility model, the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0039] It should be noted that in the description of the present application, unless otherwise specified and limited, the terms "arrangement", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0040] The technical scheme of the present application is further illustrated below in conjunction with the drawings and through specific embodiments.

[0041] In one specific embodiment, the present application provides a preparation device for self-assembled mesoporous carbon precursor material film, as shown in Figure 1 The preparation device comprises:

[0042] Slurry placement unit 1, evaporation unit 3, solvent recovery unit 4, solidification unit 5 and continuous conveyor belt 2;

[0043] The slurry placement unit 1 is located above the transmission surface of the continuous conveyor belt 2, and is used to store the evaporation self-assembly slurry of the mesoporous carbon precursor and coat the evaporation self-assembly slurry of the mesoporous carbon precursor to the transmission surface of the continuous conveyor belt 2;

[0044] The continuous conveyor belt 2 is connected to the evaporation unit 3 and the solidification unit 5 in turn;

[0045] The evaporation unit 3 is used to evaporate the solvent of the coated film transmitted by the continuous conveyor belt 2, to obtain a soft film;

[0046] The solvent recovery unit 4 is used to recover the solvent evaporated in the evaporation unit 3;

[0047] The solidification unit 5 is used to solidify the soft film obtained by the evaporation unit 3 to obtain a self-assembled mesoporous carbon precursor material film.

[0048] As a preferred technical scheme in one specific embodiment, the slurry placement unit 1 comprises a hopper, and the hopper coats the evaporation self-assembly slurry of the mesoporous carbon precursor to the transmission surface of the continuous conveyor belt 2 through the hopper discharge port;

[0049] Further, the vertical distance between the hopper discharge port and the transmission surface of the continuous conveyor belt 2 is 0-5 cm and does not include 0 cm.

[0050] As a preferred technical scheme in one specific embodiment, the vertical distance between the solvent recovery unit 4 and the evaporation unit 3 is 0-2 cm and does not include 0 cm.

[0051] As a preferred technical solution in the embodiment, the preparation device further comprises a film separation unit 6, which is located at the transmission end of the continuous conveyor belt 2, and is used to separate the self-assembled mesoporous carbon precursor material film obtained by the solidification unit 5 from the continuous conveyor belt 2.

[0052] More specifically, the film separation unit 6 comprises a film separation roller 61, which is located at the transmission end of the continuous conveyor belt 2; further, the curvature of the film separation roller 61 is >100 m -1 .

[0053] In addition, the film separation unit 6 further comprises a film scraping device 62, which is used to scrape the residual hard film on the continuous conveyor belt 2; the shortest linear distance between the film scraping device 62 and the transmission surface of the continuous conveyor belt 2 is 0-5 cm.

[0054] As a preferred technical solution in the embodiment, the preparation device further comprises a material receiving unit 7, which is used to receive the material separated by the film separation unit 6.

[0055] In an application example, the preparation device provided by the above embodiment is used in the preparation process of mesoporous carbon materials, and is suitable for the preparation process of mesoporous carbon materials prepared by the evaporation self-assembly method.

[0056] Exemplarily, the present application provides a specific use process of the above preparation device:

[0057] Mixing the carbon source, the solvent and the surfactant to obtain an evaporation self-assembly slurry of mesoporous carbon precursor with a viscosity of 2.98*10^-3 Pa·s-20 Pa·s;

[0058] The evaporation self-assembly slurry is prepared into a self-assembled mesoporous carbon precursor material film by using the preparation device described in the above embodiment;

[0059] The self-assembled mesoporous carbon precursor material film is extracted with a surfactant, carbonized, and mesoporous carbon materials are obtained;

[0060] The preparation of the mesoporous carbon precursor material film comprises:

[0061] The evaporation self-assembly slurry is coated onto the transmission surface of the continuous conveyor belt via a slurry placement unit, the continuous conveyor belt is conveyed to the evaporation unit for evaporation treatment to obtain a soft film structure, the solvent obtained by evaporation is recovered by a solvent recovery unit, and the soft film structure is conveyed from the continuous conveyor belt to the solidification unit for solidification treatment to obtain a self-assembled mesoporous carbon precursor material film.

[0062] Further, the self-assembled mesoporous carbon precursor material film obtained by the solidification treatment is separated from the surface of the continuous conveyor belt by a film separation unit.

[0063] Specifically, the mass ratio of the carbon source in the slurry is 10% to 90%, preferably 30% to 60%.

[0064] The mass ratio of the surfactant in the evaporative self-assembly slurry is 0% to 50% and does not include 0%.

[0065] The mass ratio of the solvent in the evaporative self-assembly slurry is 0% to 50% and does not include 0%.

[0066] The mixed raw materials further include an auxiliary, and the mass ratio of the auxiliary in the slurry can be 0% to 10% and does not include 0%.

[0067] Optionally, the evaporation temperature of the evaporation treatment is 10 to 120°C.

[0068] Optionally, the solidification temperature of the solidification treatment is 60 to 200°C.

[0069] Optionally, in the extraction process, the mass ratio of the self-assembled mesoporous carbon precursor material film to the extractant is (1 to 5):1, for example, 1:1, 2:1, 3:1, 4:1, or 5:1, but not limited to the listed values, and other values not listed in this range are also applicable; the extraction temperature is 0 to 100°C, for example, 0°C, 10°C, 20°C, 30°C, 40°C, 50°C, 60°C, 70°C, 80°C, 90°C, or 100°C, but not limited to the listed values, and other values not listed in this range are also applicable.

[0070] The carbon source includes but is not limited to at least one of phenolic resin, furfuryl alcohol, epoxy resin, and other compounds with a residual carbon content >30% and capable of polymerization into a solid.

[0071] The surfactant includes but is not limited to at least one of P123, F127, Triton X-100, Brij56, and other surfactants with two hydrophilic groups.

[0072] The solvent includes but is not limited to water and / or ethanol.

[0073] The auxiliary includes but is not limited to at least one of KOH, HCl, or ZnCl2.

[0074] The extractant includes but is not limited to at least one of strong polar solvents such as methanol, ethanol, and acetone.

[0075] The extraction can be single extraction or multiple extractions.

[0076] The temperature of the carbonization can be 600-1000℃, such as 600℃, 700℃, 800℃, 900℃ or 1000℃, etc.

[0077] It should be noted that the skilled person in the art can adaptively select and adjust according to the above specific preparation process when preparing the mesoporous carbon material.

[0078] Example 1

[0079] The embodiment provides a preparation device of a self-assembled mesoporous carbon precursor material film, based on the preparation device provided in the above specific embodiment:

[0080] The vertical distance between the discharge port of the hopper and the conveying surface of the continuous conveyor belt 2 is 3 cm; the vertical distance between the solvent recovery unit 4 and the evaporation unit 3 is 2 cm; the curvature of the film separation roller 61 is 200 m -1 ; the shortest linear distance between the film scraping device 62 and the conveying surface of the continuous conveyor belt 2 is 3 cm.

[0081] Example 2

[0082] The embodiment provides a preparation device of a self-assembled mesoporous carbon precursor material film, based on the preparation device provided in the above specific embodiment:

[0083] The vertical distance between the discharge port of the hopper and the conveying surface of the continuous conveyor belt 2 is 5 cm; the vertical distance between the solvent recovery unit 4 and the evaporation unit 3 is 1 cm; the curvature of the film separation roller 61 is 300 m -1 ; the shortest linear distance between the film scraping device 62 and the conveying surface of the continuous conveyor belt 2 is 5 cm.

[0084] Example 3

[0085] The embodiment provides a preparation device of a self-assembled mesoporous carbon precursor material film, based on the preparation device provided in the above specific embodiment:

[0086] The vertical distance between the discharge port of the hopper and the conveying surface of the continuous conveyor belt 2 is 1 cm; the vertical distance between the solvent recovery unit 4 and the evaporation unit 3 is 0 cm; the curvature of the film separation roller 61 is 150 m -1 ; the shortest linear distance between the film scraping device 62 and the conveying surface of the continuous conveyor belt 2 is 1 cm.

[0087] Example 4

[0088] The difference between the embodiment and example 1 is that in the film separation unit 6 of the embodiment, the curvature of the film separation roller 61 is 90 m -1 .

[0089] The remaining devices and parameters are consistent with those of Example 1.

[0090] Example 5

[0091] The difference between this example and Example 1 is that the film separation unit 6 of this example does not contain the film scraping device 62.

[0092] The remaining devices and parameters are consistent with those of Example 1.

[0093] The preparation device provided in Examples 1-5 is used in the preparation process of the mesoporous carbon material, specifically as follows:

[0094] The phenolic resin, the solvent ethanol and the surfactant P123 are mixed in a mass ratio of 50:15:35 to prepare an evaporation self-assembly slurry with a viscosity of 10 Pa·s;

[0095] The evaporation self-assembly slurry is subjected to self-assembly mesoporous carbon precursor material film preparation by the preparation device provided in Examples 1-5, specifically as follows:

[0096] The evaporation self-assembly slurry is coated onto the conveying surface of the continuous conveyor through the discharge port of the hopper, the continuous conveyor is conveyed to the evaporation unit for evaporation treatment, the solvent is evaporated, the surfactant begins to self-assemble to obtain a soft film structure, and the evaporated solvent is recovered by the solvent recovery unit. The soft film structure is transferred from the continuous conveyor to the solidification unit for solidification treatment, the self-assembly mesoporous carbon precursor material film after solidification is separated from the continuous conveyor through the film separation roller, and the residual film layer structure in the continuous conveyor is scraped off by the film scraping device. The self-assembly mesoporous carbon precursor material film is collected through the material collection unit;

[0097] The broken self-assembly mesoporous carbon precursor material film is subjected to solvent extraction with methanol, wherein the mass ratio of the self-assembly mesoporous carbon precursor material film to methanol is 3:1, and the extraction temperature is 50°C.

[0098] The extracted material is subjected to carbonization treatment at 800°C in a nitrogen atmosphere to obtain the mesoporous carbon material.

[0099] The mesoporous carbon material prepared by the preparation device of Examples 1-5 is tested for the most probable pore diameter and specific surface area according to GB / T 19587-2004. The test conditions are as follows: the obtained porous carbon material is degassed at 200°C in a vacuum environment for 6 hours, then transferred into a Micromeritics Tristar 3000 specific surface area tester, and subjected to nitrogen adsorption-desorption test at -196°C using nitrogen. The test results are shown in Table 1.

[0100] Among them, the most probable pore size refers to the pore size corresponding to the peak on the differential distribution curve of the pore size, that is, the pore size with the highest occurrence probability.

[0101] Table 1

[0102] Most probable pore diameter (nm) Specific surface area (m 2 / g) Example 1 4.5 650 Example 2 4.4 612 Example 3 4.5 583 Example 4 2.1 324 Example 5 3.6 253

[0103] In summary, the preparation device is suitable for the evaporation self-assembly slurry of mesoporous carbon precursor with high viscosity and high solid content, can quickly form a film, continuously produces, and the self-assembly mesoporous carbon precursor material film obtained at the same time is convenient for demolding; and the preparation device is not limited in size, and can be adaptively selected and adjusted according to actual needs, so as to solve the problem that the EISA method cannot be used for large-scale industrial production of mesoporous carbon materials, and has a solvent recovery unit, thereby reducing the preparation cost

[0104] The applicant declares that the above description is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, and the skilled person in the art should understand that any change or replacement within the technical range disclosed by the utility model can be easily thought of by any person skilled in the art in the technical field, and falls within the protection scope and disclosure range of the utility model.

Claims

1. An apparatus for preparing a film of a self-assembled mesoporous carbon precursor material, characterized by, The preparation device comprises: a slurry placing unit, an evaporation unit, a solvent recovery unit, a solidification unit and a continuous conveyor belt; the slurry placing unit is located above the conveying surface of the continuous conveyor belt and is used to store the evaporation self-assembly slurry of the mesoporous carbon precursor and coat the evaporation self-assembly slurry of the mesoporous carbon precursor onto the conveying surface of the continuous conveyor belt; the continuous conveyor belt is sequentially connected with the evaporation unit and the solidification unit; the evaporation unit is used to evaporate the solvent of the coated film transported by the continuous conveyor belt to obtain a soft film; the solvent recovery unit is used to recover the solvent evaporated in the evaporation unit; the solidification unit is used to solidify the soft film obtained by the evaporation unit to obtain a self-assembly mesoporous carbon precursor material film.

2. The preparation device according to claim 1, characterized in that The slurry placing unit comprises a hopper, and the hopper coats the evaporation self-assembly slurry of the mesoporous carbon precursor onto the conveying surface of the continuous conveyor belt through a hopper discharge port.

3. The preparation device according to claim 2, characterized in that The vertical distance between the hopper discharge port and the conveying surface of the continuous conveyor belt is 0-5 cm and does not include 0 cm.

4. The preparation device according to claim 1, characterized in that The vertical distance between the solvent recovery unit and the evaporation unit is 0-2 cm and does not include 0 cm.

5. The preparation device of claim 1, wherein The preparation device further comprises a film separation unit, which is located at the conveying end of the continuous conveyor belt and is used to separate the self-assembly mesoporous carbon precursor material film obtained by the solidification unit from the continuous conveyor belt.

6. The preparation device according to claim 5, characterized in that The film separation unit comprises a film separation roller, which is located at the conveying end of the continuous conveyor belt.

7. The preparation device according to claim 6, characterized in that The film separation roller has a curvature > 100 m -1 .

8. The preparation device according to claim 5 or 6, characterized in that The film separation unit further comprises a film scraping device, which is used to scrape the residual hard film on the continuous conveyor belt.

9. The preparation device according to claim 8, characterized in that The shortest linear distance between the film scraping device and the conveying surface of the continuous conveyor belt is 0-5 cm.

10. The preparation device of claim 5, wherein, The preparation device further comprises a material receiving unit, which is used to receive the material separated by the film separation unit.

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