A method for preparing a filler

Abstract

The application provides a filler preparation method, comprising the following steps: performing surface decontamination treatment on a filler base; soaking the filler base in a prepared zeolite synthesis solution; reacting at a temperature of 150-170 DEG C for 12-72 hours; and taking out the filler base and calcining the filler base at a temperature of 450-600 DEG C. In this way, a firm zeolite adhesion layer can be formed on the surface of the filler base, the zeolite adhesion layer has a porous channel structure, can provide a better diffusion path for reaction substances in a gas-liquid reaction process, and enables the gas-liquid reaction substances to obtain a larger contact area on the surface of the zeolite adhesion layer, thereby helping to effectively improve the catalytic efficiency of the filler base on the gas-liquid reaction.

Description

Technical Field

[0001] This invention relates to the field of packing preparation technology, and in particular to a method for preparing packing. Background Technology

[0002] Gas-liquid reaction technology is widely used in the chemical industry. Simply put, it uses the chemical or physical reactions that occur during the contact between a gas and a liquid to treat the gas or liquid. For example, the reaction between a gas and a liquid can be used to absorb certain components (such as carbon dioxide or sulfur dioxide) in flue gas, thereby purifying the flue gas. Alternatively, the reaction between a gas and a liquid can be used to release carbon dioxide from a liquid that has absorbed carbon dioxide, thereby obtaining a high concentration of carbon dioxide gas for further treatment. These are all specific applications of gas-liquid reaction technology.

[0003] In actual industrial production, in order to improve the gas-liquid reaction efficiency, packing components are usually installed in the gas-liquid reaction space so that the gas and liquid react on the surface of the packing components, providing a larger contact area for the gas and liquid, thereby improving the gas-liquid reaction efficiency. Summary of the Invention

[0004] One object of the present invention is to provide a method for preparing packing material that can improve the catalytic efficiency of the packing material.

[0005] Specifically, the present invention provides a method for preparing filler, comprising:

[0006] Surface cleaning treatment is performed on the filler substrate;

[0007] The filler substrate is immersed in a pre-prepared zeolite synthesis solution;

[0008] React at 150–170 degrees Celsius for 12–72 hours;

[0009] The packing substrate is removed and calcined at a temperature of 450–600 degrees Celsius.

[0010] Optionally, the pre-prepared zeolite synthesis solution comprises a silicon source, an aluminum source, a template agent, and water, with a molar ratio of 45–60: 0.2–0.3: 3–5: 1100–1300.

[0011] Optionally, the silicon source is ethyl silicate, the aluminum source is sodium aluminate, and the stencil agent is tetrapropylammonium.

[0012] Optionally, the preparation step of the pre-prepared zeolite synthesis solution includes:

[0013] Mix water and stencil agent and stir for 30-40 minutes;

[0014] Add the aluminum source and mix for 30-40 minutes;

[0015] Add the silicon source and mix for 3-4 hours;

[0016] Seal and let stand for 24–30 hours.

[0017] Optionally, a first stirring rate is used in the steps of mixing and stirring water and stencil agent for 30-40 minutes and adding aluminum source and mixing and stirring for 30-40 minutes, and a second stirring rate is used in the step of adding silicon source and mixing and stirring for 3-4 hours, wherein the second stirring rate is greater than the first stirring rate.

[0018] Optionally, the step of surface decontamination treatment of the filler substrate is followed by:

[0019] The surface of the filler substrate is sanded.

[0020] Optionally, the step of surface decontamination treatment of the filler substrate is followed by:

[0021] The filler substrate is then immersed in an acidic solution for etching.

[0022] The packing substrate is cleaned with deionized water.

[0023] Optionally, the step of immersing the filler substrate in the pre-prepared zeolite synthesis solution includes:

[0024] The filler substrate is immersed in a ZSM-5 powder suspension with a weight percentage of 4% to 6% and left to stand for 30 to 50 minutes.

[0025] Remove the packing substrate, dry it, and remove any surface deposits from the packing substrate.

[0026] Optionally, the step of calcining the filler matrix at a temperature of 450–600 degrees Celsius includes the following steps beforehand:

[0027] The filler substrate is ultrasonically treated for 30-40 minutes;

[0028] The filler substrate is placed in a temperature environment of 80-90 degrees Celsius and left to stand for 6-12 hours.

[0029] Optionally, the step of surface decontamination treatment of the filler substrate includes:

[0030] The filler substrate was ultrasonically cleaned in ethanol for 30-40 minutes.

[0031] The filler substrate was ultrasonically cleaned in acetone for 30-40 minutes.

[0032] The packing preparation method of this invention involves surface decontamination of the packing substrate, followed by immersion in a pre-prepared zeolite synthesis solution and reaction at 150–170 degrees Celsius for 12–72 hours. This process forms a robust zeolite adhesion layer on the clean surface of the packing substrate. The packing substrate is then removed and calcined at 450–600 degrees Celsius to remove the template agent from the zeolite adhesion layer, resulting in a porous structure. This porous structure of the zeolite adhesion layer on the surface of the packing substrate provides better diffusion paths for the reactants during the gas-liquid reaction, allowing for a larger contact area and thus significantly improving the catalytic efficiency of the packing substrate in the gas-liquid reaction.

[0033] Furthermore, the filler preparation method of the present invention, by ultrasonically treating the filler substrate for 30-40 minutes before calcining the filler substrate at a temperature of 450-600 degrees Celsius, can first remove the weak adhesion layer on the surface of the filler substrate. Then, the filler substrate is placed in a temperature environment of 80-90 degrees Celsius and left to stand for 6-12 hours. This not only allows the template agent on the surface of the filler substrate to be pre-desorbed, making it easier for the template agent to fall off during the calcination process, thereby saving energy and improving processing efficiency to a certain extent, but also helps to make the zeolite adhesion layer structure on the surface of the filler substrate more stable before calcination, reducing the risk of damage to the zeolite adhesion layer structure during the subsequent calcination process.

[0034] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0035] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0036] Figure 1 This is a schematic flowchart of a filler preparation method according to an embodiment of the present invention;

[0037] Figure 2 This is a schematic flowchart of a filler preparation method according to another embodiment of the present invention;

[0038] Figure 3 This is a schematic flowchart of a filler preparation method according to yet another embodiment of the present invention;

[0039] Figure 4 This is a schematic flowchart of a filler preparation method according to yet another embodiment of the present invention;

[0040] Figure 5 This is a schematic flowchart of a filler preparation method according to yet another embodiment of the present invention;

[0041] Figure 6 This is a schematic flowchart of a filler preparation method according to yet another embodiment of the present invention;

[0042] Figure 7 This is a schematic flowchart of a filler preparation method according to yet another embodiment of the present invention;

[0043] Figure 8 This is a schematic flowchart of a filler preparation method according to yet another embodiment of the present invention. Detailed Implementation

[0044] Those skilled in the art should understand that the embodiments described below are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. These partial embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0045] like Figure 1 As shown, in one embodiment, the filler preparation method generally includes:

[0046] Step S101 involves surface decontamination treatment of the filler substrate. Specifically, the filler substrate is made of stainless steel or other alloy materials. First, the filler substrate needs to be decontaminated to ensure a clean surface, thereby ensuring the subsequent adhesion effect and helping to extend the service life of the filler substrate.

[0047] Reference Figure 2 As shown, specifically, in one embodiment, this step includes:

[0048] Step S201: Soak the packing substrate in ethanol for ultrasonic cleaning for 30-40 minutes. That is, immerse the packing substrate in ethanol for ultrasonic cleaning for 30-40 minutes, for example, 30 minutes, 32 minutes, 35 minutes, 37 minutes, or 40 minutes, etc.

[0049] Step S202: Ultrasonically clean the packing substrate in acetone for 30-40 minutes. That is, after ultrasonically cleaning the packing substrate in ethanol, immerse the packing substrate in acetone for ultrasonic cleaning for 30-40 minutes, for example, 30 minutes, 32 minutes, 35 minutes, 37 minutes, or 40 minutes, etc.

[0050] By ultrasonically cleaning the packing substrate sequentially in ethanol and acetone, the packing substrate can be thoroughly cleaned, removing organic matter, oil, and other contaminants from its surface. This ensures a clean surface, guaranteeing subsequent adhesion and preventing the presence of corrosive substances, thus helping to extend the service life of the packing substrate.

[0051] Step S102 involves immersing the filler substrate in a pre-prepared zeolite synthesis solution. Specifically, the pre-prepared zeolite synthesis solution comprises a silicon source, an aluminum source, a template agent, and water, with a molar ratio of 45–60:0.2–0.3:3–5:1100–1300. Preferably, the molar ratio of silicon source, aluminum source, template agent, and water is 50:0.25:4:1200. Furthermore, the silicon source is ethyl silicate, the aluminum source is sodium aluminate, and the template agent is tetrapropylammonium, thereby achieving good adhesion to the metal filler substrate.

[0052] Reference Figure 3 As shown, in one embodiment, the preparation step of the pre-prepared zeolite synthesis solution generally includes:

[0053] Step S301: Mix water and stencil agent and stir for 30-40 minutes. For example, the stirring time can be 30 minutes, 32 minutes, 35 minutes, 37 minutes, or 40 minutes, etc.

[0054] Step S302: Add aluminum source and mix for 30-40 minutes. Specifically, after mixing water and stencil agent, add aluminum source to the mixed solution and stir. The stirring time can be 30 minutes, 32 minutes, 35 minutes, 37 minutes, or 40 minutes, etc.

[0055] Step S303: Add silicon source and mix for 3-4 hours. Specifically, after adding aluminum source and mixing, add silicon source and mix for 3 hours, 3.5 hours, or 4 hours, etc.

[0056] Furthermore, a first stirring rate is used in steps S301 and S302, and a second stirring rate is used in step S303. The second stirring rate is greater than the first stirring rate, thereby improving the mixing effect. Specifically, the stirring rate is the number of stirring revolutions per unit time.

[0057] Step S304: Seal and let stand for 24-30 hours. Specifically, seal the mixture formed by stirring and let it stand for aging. The time can be 24 hours, 25 hours, 26 hours, 27 hours, 28 hours, 29 hours, or 30 hours, etc.

[0058] By mixing water and template agent for 30-40 minutes, then adding aluminum source and mixing for another 30-40 minutes, and then adding silicon source and mixing for another 3-4 hours, the required components of the pre-prepared zeolite synthesis solution are mixed using a stepwise mixing method, which helps to improve the mixing effect of various components.

[0059] Step S103 involves reacting at a temperature of 150–170 degrees Celsius for 12–72 hours. Specifically, the filler substrate immersed in the pre-prepared zeolite synthesis solution is placed in an environment with a temperature of 150–170 degrees Celsius and reacted for 12–72 hours, thereby forming a zeolite adhesion layer on the surface of the filler substrate. Exemplarily, the temperature can be 150 degrees Celsius, 155 degrees Celsius, 160 degrees Celsius, 165 degrees Celsius, or 170 degrees Celsius, preferably 160 degrees Celsius. The reaction time can be 12 hours, 20 hours, 30 hours, 40 hours, 50 hours, 60 hours, 70 hours, or 72 hours, etc.

[0060] Step S104: Remove the filler substrate and calcine it at a temperature of 450–600 degrees Celsius. Specifically, the template agent mainly plays a space-filling role in the zeolite synthesis process. After the zeolite synthesis is completed, the template agent is usually trapped in the pores of the zeolite. Since the catalytic effect of zeolite mainly utilizes the large specific surface area formed by its porous structure, the template agent must be removed to open the pores of the zeolite, so that the zeolite can exhibit its due catalytic activity. Therefore, the filler substrate that has reacted with the pre-prepared zeolite synthesis solution is removed, and then the filler substrate is calcined at a temperature of 450–600 degrees Celsius to remove the template agent in the zeolite adhesion layer, so that the zeolite can obtain open pores. For example, the temperature can be 450 degrees Celsius, 500 degrees Celsius, 550 degrees Celsius, or 600 degrees Celsius, etc.

[0061] In this embodiment, the packing substrate is surface-cleaned and then immersed in a pre-prepared zeolite synthesis solution. The solution is reacted at 150–170 degrees Celsius for 12–72 hours, resulting in a robust zeolite adhesion layer on the clean surface of the packing substrate. The packing substrate is then removed and calcined at 450–600 degrees Celsius to remove the template agent from the zeolite adhesion layer, forming a porous structure. This creates a porous zeolite adhesion layer on the surface of the packing substrate, providing better diffusion paths for the reactants during the gas-liquid reaction. This allows for a larger contact area between the gas and liquid reactants on the surface of the zeolite adhesion layer, thereby effectively improving the catalytic efficiency of the packing substrate for the gas-liquid reaction.

[0062] like Figure 4As shown, in one embodiment, after the step of surface decontamination treatment of the filler substrate, the method includes: sanding the surface of the filler substrate. Specifically, the filler preparation method of this embodiment generally includes:

[0063] Step S401: Perform surface cleaning treatment on the filler substrate.

[0064] Step S402: The filler substrate is sanded. Specifically, sandpaper can be used to sand the filler substrate, for example, 300-grit, 600-grit, or 1000-grit sandpaper can be used.

[0065] Step S403: Immerse the filler substrate in the pre-prepared zeolite synthesis solution.

[0066] Step S404: React at a temperature of 150–170 degrees Celsius for 12–72 hours.

[0067] Step S405: Remove the packing base and calcine it at a temperature of 450-600 degrees Celsius.

[0068] In this embodiment, by performing surface decontamination treatment on the packing substrate and then sanding the packing substrate, the surface roughness of the packing substrate can be increased, which helps to improve the subsequent adhesion effect of zeolite on the packing substrate. This facilitates the formation of a better zeolite adhesion layer on the surface of the packing substrate, thereby further improving the catalytic effect of the packing substrate.

[0069] Steps not detailed in this embodiment are as described above and will not be repeated here.

[0070] like Figure 5 As shown, in one embodiment, after the step of surface decontamination treatment of the filler substrate, the method includes: immersing the filler substrate in an acidic solution for etching; and cleaning the filler substrate with deionized water. Specifically, the filler preparation method of this embodiment generally includes:

[0071] Step S501: Perform surface cleaning treatment on the filler substrate.

[0072] Step S502 involves immersing the filler substrate in an acidic solution for etching. Specifically, the filler substrate can be immersed in a 0.1 mol / L hydrochloric acid solution for etching.

[0073] Step S503: Clean the packing substrate with deionized water. Specifically, the packing is removed from the acidic solution and cleaned with deionized water to remove any residual acidic solution from the surface.

[0074] Step S504: Immerse the filler substrate in the pre-prepared zeolite synthesis solution.

[0075] Step S505: React at a temperature of 150–170 degrees Celsius for 12–72 hours.

[0076] Step S506: Remove the packing base and calcine it at a temperature of 450 to 600 degrees Celsius.

[0077] In this embodiment, by performing surface decontamination treatment on the filler substrate, immersing the filler substrate in an acidic solution for etching, and then cleaning the filler substrate with deionized water, the surface roughness of the filler substrate can be increased, which helps to improve the subsequent adhesion effect of zeolite on the filler substrate. This facilitates the formation of a better zeolite adhesion layer on the surface of the filler substrate, thereby further improving the catalytic effect of the filler substrate.

[0078] It should be noted that the filler substrate can be both sanded and etched in an acidic solution.

[0079] Steps not detailed in this embodiment are as described above and will not be repeated here.

[0080] like Figure 6 As shown, in one embodiment, prior to the step of immersing the filler substrate in the pre-prepared zeolite synthesis solution, the following steps are included: immersing the filler substrate in a ZSM-5 powder suspension of 4% to 6% by weight and allowing it to stand for 30 to 50 minutes; removing the filler substrate, drying it, and removing surface deposits from the filler substrate.

[0081] Specifically, the filler preparation method of this embodiment generally includes:

[0082] Step S601: Perform surface cleaning treatment on the filler substrate.

[0083] Step S602: Immerse the filler substrate in a ZSM-5 powder suspension with a weight percentage of 4% to 6%, and let it stand for 30 to 50 minutes. Specifically, a ZSM-5 powder suspension with a weight percentage of 4% to 6% means that the weight of ZSM-5 powder accounts for 4% to 6% of the total weight of the solution, for example, it can be 4%, 5%, or 6%, etc. The standing time can be 30 minutes, 40 minutes, or 50 minutes, etc. This allows powder to be deposited on the surface of the filler substrate.

[0084] Step S603: Remove the filler substrate, dry it, and remove the surface deposits on the filler substrate. Specifically, remove the filler substrate from the ZSM-5 powder suspension, dry the filler substrate, and then remove the surface deposits on the filler substrate, that is, remove the powder deposited on the surface of the filler substrate.

[0085] Step S604: Immerse the filler substrate in the pre-prepared zeolite synthesis solution.

[0086] Step S605: React at a temperature of 150–170 degrees Celsius for 12–72 hours.

[0087] Step S606: Remove the packing base and calcine it at a temperature of 450 to 600 degrees Celsius.

[0088] In this embodiment, by immersing the filler substrate in a ZSM-5 powder suspension of 4% to 6% by weight before immersing it in the pre-prepared zeolite synthesis solution, allowing it to stand for 30 to 50 minutes, removing the filler substrate, drying it, and removing the surface deposits, the adhesion of the filler substrate surface in subsequent steps is improved, thereby enhancing the subsequent zeolite adhesion effect.

[0089] Steps not detailed in this embodiment are as described above and will not be repeated here.

[0090] like Figure 7 As shown, in one embodiment, prior to the step of calcining the filler substrate at a temperature of 450–600 degrees Celsius, the following steps are included: ultrasonically treating the filler substrate for 30–40 minutes; and placing the filler substrate in a temperature environment of 80–90 degrees Celsius for 6–12 hours.

[0091] Specifically, the filler preparation method of this embodiment generally includes:

[0092] Step S701: Perform surface cleaning treatment on the filler substrate.

[0093] Step S702: Immerse the filler substrate in the pre-prepared zeolite synthesis solution.

[0094] Step S703: React at a temperature of 150–170 degrees Celsius for 12–72 hours.

[0095] Step S704: Remove the filler substrate and ultrasonically treat it for 30-40 minutes. Specifically, after the filler substrate has reacted in the pre-prepared zeolite synthesis solution for the required time, remove the filler substrate and ultrasonically treat it to remove the weak adhesion layer on the surface. For example, the treatment time can be 30 minutes, 32 minutes, 35 minutes, 37 minutes, or 40 minutes, etc.

[0096] Step S705: Place the packing matrix in a temperature environment of 80-90 degrees Celsius for 6-12 hours. For example, the temperature could be 80 degrees Celsius, 85 degrees Celsius, or 90 degrees Celsius, etc. The time could be 6 hours, 8 hours, 10 hours, or 12 hours, etc.

[0097] Step S706: Calcine the filler matrix at a temperature of 450 to 600 degrees Celsius.

[0098] In this embodiment, by ultrasonically treating the filler substrate for 30-40 minutes before calcining it at 450-600 degrees Celsius, the weak adhesion layer on the surface of the filler substrate can be detached first. Then, the filler substrate is placed in a temperature environment of 80-90 degrees Celsius for 6-12 hours. This not only allows the template agent on the surface of the filler substrate to be pre-desorbed, making it easier for the template agent to detach during the calcination process, thereby saving energy and improving processing efficiency to a certain extent, but also helps to make the zeolite adhesion layer structure on the surface of the filler substrate more stable before calcination, reducing the risk of damage to the zeolite adhesion layer structure during subsequent calcination.

[0099] Steps not detailed in this embodiment are as described above and will not be repeated here.

[0100] like Figure 8 As shown, in one embodiment, the filler preparation method generally includes:

[0101] Step S801: Perform surface cleaning treatment on the packing substrate. Specifically, the packing substrate can be ultrasonically cleaned in ethanol and acetone sequentially for 30-40 minutes.

[0102] Step S802 involves surface roughening of the filler substrate. Specifically, the filler substrate may be sanded, and / or etched in an acidic solution.

[0103] Step S803: Immerse the filler substrate in a ZSM-5 powder suspension with a weight percentage of 4% to 6% and let it stand for 30 to 50 minutes.

[0104] Step S804: Remove the packing substrate, dry it, and remove the surface deposits of the packing substrate.

[0105] Step S805: Immerse the filler substrate in the pre-prepared zeolite synthesis solution.

[0106] Step S806: React at a temperature of 150–170 degrees Celsius for 12–72 hours.

[0107] Step S807: Remove the packing substrate and ultrasonically treat the packing substrate for 30-40 minutes.

[0108] Step S808: Place the packing substrate in a temperature environment of 80-90 degrees Celsius and let it stand for 6-12 hours.

[0109] Step S809: Calcine the filler substrate at a temperature of 450–600 degrees Celsius.

[0110] In this embodiment, by adopting the above steps, a solid zeolite adhesion layer can be formed on the surface of the packing substrate. The zeolite adhesion layer has a porous structure, which can provide a better diffusion path for the reactants during the gas-liquid reaction process, so that the gas-liquid reactants can obtain a larger contact area on the surface of the zeolite adhesion layer, thereby helping to effectively improve the catalytic efficiency of the packing substrate for gas-liquid reaction.

[0111] Steps not detailed in this embodiment are as described above and will not be repeated here.

[0112] Experiments revealed that the packing materials prepared using the above method effectively improved gas production per unit time during carbon dioxide desorption, and the larger the specific surface area of ​​the packing material, the better the catalytic effect. For example, for Dixon packing, gas production per unit time increased by 24.30%, for Y-type packing by 53.50%, and for triangular spiral packing by 78.57%.

[0113] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A method for preparing a packing material, comprising: Surface cleaning treatment is performed on the filler substrate; The filler substrate is immersed in a pre-prepared zeolite synthesis solution; React at 150–170 degrees Celsius for 12–72 hours; The packing substrate is removed and calcined at a temperature of 450–600 degrees Celsius.

2. The packing preparation method according to claim 1, wherein, The pre-prepared zeolite synthesis solution comprises a silicon source, an aluminum source, a template agent, and water, with a molar ratio of 45–60: 0.2–0.3: 3–5: 1100–1300.

3. The filler preparation method according to claim 2, wherein, The silicon source is ethyl silicate, the aluminum source is sodium aluminate, and the template agent is tetrapropylammonium.

4. The filler preparation method according to claim 2, wherein, The preparation steps of the pre-prepared zeolite synthesis solution include: Mix water and stencil agent and stir for 30-40 minutes; Add the aluminum source and mix for 30-40 minutes; Add the silicon source and mix for 3-4 hours; Seal and let stand for 24–30 hours.

5. The filler preparation method according to claim 4, wherein, In the steps of mixing and stirring water and stencil agent for 30-40 minutes and adding aluminum source and mixing and stirring for 30-40 minutes, a first stirring rate is used for stirring. In the step of adding silicon source and mixing and stirring for 3-4 hours, a second stirring rate is used for stirring, and the second stirring rate is greater than the first stirring rate.

6. The packing preparation method according to claim 1, wherein, The step of surface decontamination treatment of the filler substrate is followed by: The surface of the filler substrate is sanded.

7. The packing preparation method according to claim 1, wherein, The step of surface decontamination treatment of the filler substrate is followed by: The filler substrate is then immersed in an acidic solution for etching. The filler substrate is cleaned with deionized water.

8. The method for preparing the filler according to claim 1, wherein, Prior to the step of immersing the filler substrate in the pre-prepared zeolite synthesis solution, the following is included: The filler substrate is immersed in a ZSM-5 powder suspension with a weight percentage of 4% to 6% and left to stand for 30 to 50 minutes. Remove the packing substrate, dry it, and remove any surface deposits from the packing substrate.

9. The method for preparing the filler according to claim 1, wherein, Prior to the step of calcining the filler matrix at a temperature of 450–600 degrees Celsius, the following steps are included: The filler substrate is ultrasonically treated for 30-40 minutes; The filler substrate is placed in a temperature environment of 80-90 degrees Celsius and left to stand for 6-12 hours.

10. The method for preparing the filler according to claim 1, wherein, The step of surface decontamination treatment of the filler substrate includes: The filler substrate was ultrasonically cleaned in ethanol for 30-40 minutes. The filler substrate was ultrasonically cleaned in acetone for 30-40 minutes.

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