Processing technology for prolonging service life of high-temperature mesh belt

Abstract

The invention discloses a processing technology for prolonging the service life of a high-temperature mesh belt, and relates to the technical field of prolonging the service life of the high-temperature mesh belt, and the processing technology comprises the following steps: coating a template liquid on the surface of the high-temperature mesh belt, ventilating at room temperature for 5-10 minutes, soaking the ventilated high-temperature mesh belt in absolute ethyl alcohol for 15-30 minutes, and drying at room temperature, the high-temperature mesh belt with the flexible porous structure coating is obtained; the preparation method comprises the following steps: adding silicon resin A, silicon resin B, silicon resin C, fluorinated acryloyloxy POSS (Polyhedral Oligomeric Silsesquioxane), a photoinitiator 819 and triaryl sulfonium hexafluoroantimonate into anhydrous dimethyl carbonate, and uniformly stirring to obtain a mixed solution; and coating the mixed solution on the surface of a high-temperature mesh belt with a flexible porous structure coating, placing the high-temperature mesh belt in a dark environment, ventilating at room temperature for 12-24 hours, carrying out photo-crosslinking curing in a nitrogen atmosphere for 10-15 minutes, and carrying out photo-crosslinking curing in air for 10-15 minutes, thereby achieving the effect of prolonging the service life of the high-temperature mesh belt.

Description

Technical Field

[0001] The invention relates to the technical field of extending the service life of a high-temperature mesh belt, and in particular to a processing technology for extending the service life of a high-temperature mesh belt. Background Art

[0002] In many fields of modern industrial production, such as food baking, ceramic firing, metal heat treatment, etc., high temperature mesh belts play a vital role. As a key component for carrying and conveying materials, it continuously operates under high temperature conditions and shoulders the important task of ensuring efficient and stable operation of the production line.

[0003] Traditional high-temperature mesh belt processing technology often focuses on improving its high-temperature resistance, such as selecting special alloy materials and optimizing the weaving structure to ensure that the mesh belt has sufficient strength and toughness in high-temperature environments to meet the needs of long-term, high-intensity operations. However, in actual production application scenarios, it is found that only focusing on high-temperature tolerance is not enough to fully guarantee the service life of the high-temperature mesh belt.

[0004] The working environment of high-temperature mesh belts is complex and diverse, among which humidity is a particularly prominent factor in the erosion of their performance. In many industrial sites, especially some factories in the south, the air humidity is high all year round, and some production links may also be accompanied by water vapor, such as the cooking process in food processing and the condensation process in chemical synthesis. Once the high-temperature mesh belt is in such a humid environment, moisture can easily penetrate into the internal structure of the mesh belt, causing the metal material to rust and the alloy components to corrode, thereby weakening the overall strength of the mesh belt. When the high-temperature mesh belt is damp and continues to bear high temperature loads, it is more likely to break, deform and other faults, which will not only cause frequent downtime for maintenance and increase production costs, but may also affect product quality and delay production progress.

[0005] In addition, various pollutants in the industrial environment, including dust, oil, chemical particles, etc., can also cause serious damage to the high-temperature mesh belt. Dust accumulation on the surface of the mesh belt will affect the heat dissipation effect and aggravate local overheating; oil adhesion will hinder heat transfer on the one hand, and may cause carbonization and coking at high temperatures on the other hand, further destroying the organizational structure of the mesh belt; chemical particles may react chemically with the mesh belt material, accelerating the corrosion process.

[0006] In summary, the existing high-temperature mesh belt processing technology has obvious shortcomings when dealing with complex environmental factors such as humidity and pollution. There is an urgent need for a new processing technology that can comprehensively consider environmental factors to effectively extend the service life of the high-temperature mesh belt and ensure the continuous and stable operation of industrial production. Summary of the invention

[0007] The purpose of the present invention is to provide a processing technology for extending the service life of a high-temperature mesh belt, so as to solve the problems raised in the prior art.

[0008] To achieve the above object, the present invention provides the following technical solutions: A processing technology for extending the service life of a high-temperature mesh belt, comprising the following steps: S1: coating a template liquid on the surface of the high-temperature mesh belt, ventilating the high-temperature mesh belt at room temperature for 5-10 minutes, soaking the ventilated high-temperature mesh belt in anhydrous ethanol for 15-30 minutes, and drying at room temperature to obtain a high-temperature mesh belt with a flexible porous structure coating; S2: Add silicone resin A, silicone resin B, silicone resin C, fluorinated acryloyloxy POSS, photoinitiator 819, and triarylsulfonium hexafluoroantimonate into anhydrous dimethyl carbonate, stir evenly to obtain a mixed solution; apply the mixed solution on the surface of a high-temperature mesh belt with a flexible porous structure coating, place it in a dark environment and ventilate it at room temperature for 12-24 hours, photocrosslink and cure it in a nitrogen atmosphere for 10-15 minutes, and photocrosslink and cure it in air for 10-15 minutes, so as to extend the service life of the high-temperature mesh belt.

[0009] The template liquid is prepared from polyvinylidene fluoride-hexafluoropropylene and dibutyl phthalate; The silicone resin A is prepared from hexamethyldisiloxane, γ-methacryloxypropyltrimethoxysilane, tetraethyl silicate, and 1H,1H,2H,2H perfluorooctyltriethoxysilane; The silicone resin B is prepared from dimethoxydiphenylsilane and γ-methacryloxypropyltrimethoxysilane; The silicone resin C is prepared from silicone resin B and a 2-ureido-4[1H]-pyrimidinone derivative.

[0010] Furthermore, the method for preparing the template liquid comprises the following steps: adding polyvinylidene fluoride-hexafluoropropylene and dibutyl phthalate into acetone, heating to 50-55° C. and stirring for 1-1.5 hours to obtain the template liquid; wherein the mass ratio of polyvinylidene fluoride-hexafluoropropylene: dibutyl phthalate is 1:(10-15).

[0011] Furthermore, the preparation method of the silicone resin A comprises the following steps: adding hexamethyldisiloxane, γ-methacryloxypropyltrimethoxysilane, tetraethyl silicate, 1H,1H,2H,2H perfluorooctyltriethoxysilane, deionized water, ethanol, and acetic acid into a reaction container, heating to 70-75° C. for reaction for 6-8 hours, and rotary evaporation to obtain silicone resin A; Furthermore, in the preparation process of the silicone resin A, the molar ratio of hexamethyldisiloxane:γ-methacryloxypropyltrimethoxysilane:tetraethyl silicate:1H,1H,2H,2H perfluorooctyltriethoxysilane is 7.5:35:25:2.5.

[0012] Furthermore, the preparation method of the silicone resin B comprises the following steps: adding dimethoxydiphenylsilane to a mixed solvent of xylene and ethanol, adding 1wt% dilute phosphoric acid, heating to 65-70°C for reaction for 3-3.5h, adding γ-methacryloxypropyltrimethoxysilane, keeping the temperature for reaction for 3-3.5h, and obtaining silicone resin B; Furthermore, in the process of the silicone resin B, the molar ratio of dimethoxydiphenylsilane to γ-methacryloxypropyltrimethoxysilane is 1:(1-5).

[0013] Furthermore, the preparation method of the silicone resin C comprises the following steps: adding silicone resin B, 2-ureido-4[1H]-pyrimidinone derivative and chloroform into a reaction container, heating to 90-92° C. under a nitrogen atmosphere for 6-7 hours to obtain silicone resin C; Furthermore, in the preparation process of the silicone resin C, the mass ratio of silicone resin B: 2-ureido-4[1H]-pyrimidinone derivative is 100:(1-2).

[0014] Furthermore, the preparation method of the 2-ureido-4[1H]-pyrimidinone derivative comprises the following steps: adding 2-amino-4-hydroxy-6-methylpyridine and hexamethylene diisocyanate into a reaction container, heating to 90-92° C. under a nitrogen atmosphere for reaction for 24-26 hours, cooling to room temperature, adding n-hexane, stirring for 1-1.5 hours, filtering, and vacuum drying to obtain a 2-ureido-4[1H]-pyrimidinone derivative; Furthermore, in the preparation process of the 2-ureido-4[1H]-pyrimidinone derivative, the molar ratio of 2-amino-4-hydroxy-6-methylpyridine to hexamethylene diisocyanate is 1:(7.4-7.6).

[0015] Furthermore, the preparation method of the fluorinated acryloyloxy POSS comprises the following steps: adding epoxy acryloyloxy POSS, poly (perfluoroisopropylene oxide) with terminal carboxyl group, tetrabutylammonium bromide, trifluorotoluene, and 1,4-dioxane into a reaction container, heating to 105-110° C. for reaction for 18-20 hours, cooling to room temperature, centrifuging, extracting with deionized water, drying the organic layer with magnesium sulfate, filtering, rotary evaporation, dissolving the product in anhydrous dimethyl carbonate, filtering, and vacuum drying to obtain fluorinated acryloyloxy POSS; Furthermore, in the preparation process of the fluorinated acryloyloxy POSS, the molar ratio of epoxy acryloyloxy POSS: terminal carboxyl poly(perfluoroisopropylene oxide) is (2.1-2.4):(0.12-0.14).

[0016] Furthermore, the preparation method of the epoxy acryloyloxy POSS comprises the following steps: adding γ-glycidyloxypropyl trimethoxysilane, γ-methacryloyloxypropyl trimethoxysilane, tetramethylammonium hydroxide, triethylamine, and toluene into a reaction container, heating to reflux reaction for 72 hours under a nitrogen atmosphere, washing, vacuum drying, and purifying to obtain epoxy acryloyloxy POSS; Furthermore, in the preparation process of the epoxy acryloxy POSS, the molar ratio of γ-glycidyloxypropyltrimethoxysilane to γ-methacryloxypropyltrimethoxysilane is 2:6.

[0017] Furthermore, in step S1, the template liquid coating thickness is 20-30 μm.

[0018] Furthermore, in the step S2, the proportions of the raw materials of each component in the mixed solution include, by mass, 20-40 parts of silicone resin A, 60-80 parts of silicone resin B, 20-40 parts of silicone resin C, 3-9 parts of fluorinated acryloyloxy POSS, 8192.9-3.4 parts of photoinitiator, and 1.2-1.6 parts of triarylsulfonium hexafluoroantimonate; the amount of the mixed solution coated on the surface of the high-temperature mesh belt having a flexible porous structure coating is such that the pore filling rate of the flexible porous structure coating reaches 100%.

[0019] Furthermore, the solid content of the mixed solution is 10-30wt%.

[0020] Furthermore, the photocuring and crosslinking is performed after the focused light beam emitted by the 500W mercury lamp passes through a 280nm long-pass filter.

[0021] Furthermore, the high temperature mesh belt material includes any one of SUS314, SUS316L, and SUS310S.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses polyvinylidene fluoride-hexafluoropropylene and dibutyl phthalate as raw materials to prepare a flexible porous polyvinylidene fluoride-hexafluoropropylene bracket on the surface of a high-temperature mesh belt, uses acryloxy silicone resin as a matrix resin, and is matched with fluorine-containing silicone resin, 2-urea-4[1H]-pyrimidone derivative composite silicone resin and perfluorinated polypropylene oxide grafted modified POSS with terminal carboxyl groups. The prepared mixed solution is filled in the pores of the flexible porous polyvinylidene fluoride-hexafluoropropylene bracket, and under the action of a photoinitiator and a photocuring agent, a coating structure with a flexible-rigid structure and an organic-inorganic nanostructure is prepared. The purpose is to extend the service life of the high-temperature mesh belt. The coating structure prepared by the present invention can provide the high-temperature mesh belt with excellent wear resistance and corrosion resistance, thereby achieving the purpose of extending the service life of the high-temperature mesh belt.

[0023] 2. The epoxy acryloxy POSS prepared by the present invention has high wear resistance, but is not oil-proof or water-proof and has limited flexibility. Perfluorinated polypropylene oxide with terminal carboxyl groups is grafted onto its surface, and silicone resin A containing fluorinated segments is combined with silicone resin C containing 2-urea-4[1H]-pyrimidinone derivatives. The high-temperature mesh belt treated together has excellent oil-proof, water-proof and corrosion-resistant properties, thereby extending the service life of the high-temperature mesh belt.

[0024] 3. Wear resistance is a combination of coating toughness and hardness. The present invention achieves a perfect combination of soft-segment support and hard-segment filler by controlling the ratio of coating template components, coating thickness, and pore filling rate of porous support. The soft-segment support dissipates bending stress, and the hard-segment filler provides structural support, so that the treated high-temperature mesh belt has excellent wear resistance and extends the service life of the high-temperature mesh belt. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the following examples, the specifications of poly(perfluoroisopropylene oxide) are: Krytox157 FLS, Mn=2.5 kDa; the specifications of polyvinylidene fluoride-hexafluoropropylene are: Mw=400 kDa, Mn=130 kDa, and the density is 1.77 g / cm 3 ; The material of high temperature mesh belt is SUS314; the other raw materials are commercially available.

[0027] A method for preparing a 2-ureido-4[1H]-pyrimidinone derivative comprises the following steps: adding 1 mmol 2-amino-4-hydroxy-6-methylpyridine and 7.4 mmol hexamethylene diisocyanate into a reaction container, heating to 90° C. for reaction for 24 hours under a nitrogen atmosphere, cooling to room temperature, adding n-hexane, stirring for 1 hour, filtering, and vacuum drying to obtain a 2-ureido-4[1H]-pyrimidinone derivative; The preparation method of fluorinated acryloyloxy POSS comprises the following steps: step (1): adding 2 mol of γ-glycidyloxypropyltrimethoxysilane, 6 mol of γ-methacryloyloxypropyltrimethoxysilane, 0.3 mol of tetramethylammonium hydroxide, 0.4 mol of triethylamine, and 400 mL of toluene into a reaction container, heating to reflux reaction for 72 hours under a nitrogen atmosphere, washing, vacuum drying, and purifying to obtain epoxy acryloyloxy POSS; Step (2): 2.1 mmol epoxy acryloyloxy POSS, 0.12 mmol terminal carboxyl poly (perfluoroisopropylene oxide), 0.012 mmol tetrabutylammonium bromide, 4 mL trifluorotoluene, 14 mL 1,4-dioxane are added to a reaction vessel, heated to 105 ° C for 18 hours, cooled to room temperature, centrifuged, extracted with deionized water, dried the organic layer with magnesium sulfate, filtered, evaporated by rotary evaporation, dissolved the product in anhydrous dimethyl carbonate, filtered, and vacuum dried to obtain fluorinated acryloyloxy POSS.

[0028] Example 1: A processing technology for extending the service life of a high-temperature mesh belt, comprising the following steps: S1: 7.5mmol hexamethyldisiloxane, 35mmol γ-methacryloxypropyltrimethoxysilane, 25mmol tetraethyl silicate, 2.5mmol 1H,1H,2H,2H perfluorooctyltriethoxysilane, 3.5g deionized water, 3g ethanol, and 1mL acetic acid are added to a reaction container, heated to 70°C for reaction for 6h, and evaporated by rotary evaporation to obtain silicone resin A; S2: Add 1 mmol of dimethoxydiphenylsilane to a mixed solvent of xylene and ethanol, add 1 wt% of dilute phosphoric acid, heat to 65-70°C for reaction for 3-3.5 hours, add 1 mmol of γ-methacryloxypropyltrimethoxysilane, keep warm for reaction for 3-3.5 hours, and obtain silicone resin B; S3: Add 100 g of silicone resin B, 1 g of 2-ureido-4[1H]-pyrimidinone derivative and chloroform into a reaction vessel, heat to 90° C. under a nitrogen atmosphere and react for 6-7 hours to obtain silicone resin C; S4: Add 1 g of polyvinylidene fluoride-hexafluoropropylene and 10 g of dibutyl phthalate into acetone, heat to 50-55° C. and stir for 1-1.5 h to obtain a template solution; S5: coating the template liquid on the surface of the high-temperature mesh belt, ventilating at room temperature for 5 minutes, soaking the ventilated high-temperature mesh belt in anhydrous ethanol for 15 minutes, and drying at room temperature to obtain a high-temperature mesh belt with a flexible porous structure coating; S6: Add 20 parts of silicone resin A, 60 parts of silicone resin B, 20 parts of silicone resin C, 3 parts of fluorinated acryloyloxy POSS, 1.2 parts of photoinitiator 819, and 2.9 parts of triarylsulfonium hexafluoroantimonate into anhydrous dimethyl carbonate, stir evenly to obtain a mixed solution; apply the mixed solution on the surface of a high-temperature mesh belt with a flexible porous structure coating, place it in a dark environment and ventilate it at room temperature for 12 hours, photocrosslink and cure it in a nitrogen atmosphere for 10 minutes, and photocrosslink and cure it in air for 10 minutes, so as to extend the service life of the high-temperature mesh belt.

[0029] Example 2: A processing technology for extending the service life of a high-temperature mesh belt, comprising the following steps: S2: adding 1 mmol of dimethoxydiphenylsilane to a mixed solvent of xylene and ethanol, adding 1 wt% of dilute phosphoric acid, heating to 65-70°C for reaction for 3-3.5 hours, adding 5 mmol of γ-methacryloxypropyltrimethoxysilane, keeping the temperature for reaction for 3-3.5 hours, and obtaining silicone resin B; S3: 100 g of silicone resin B, 2 g of 2-ureido-4[1H]-pyrimidinone derivative and chloroform were added to a reaction container, heated to 90° C. under a nitrogen atmosphere for 6-7 hours to obtain silicone resin C; The remaining steps are the same as those in Example 1.

[0030] Example 3: A processing technology for extending the service life of a high-temperature mesh belt, comprising the following steps: S4: adding 1 g of polyvinylidene fluoride-hexafluoropropylene and 15 g of dibutyl phthalate to acetone, heating to 50-55° C. and stirring for 1-1.5 h to obtain a template liquid; The remaining steps are the same as those in Example 2.

[0031] Example 4: A processing technology for extending the service life of a high-temperature mesh belt, comprising the following steps: S6: Add 40 parts of silicone resin A, 60 parts of silicone resin B, 40 parts of silicone resin C, 9 parts of fluorinated acryloyloxy POSS, 1.4 parts of photoinitiator 819, and 3.2 parts of triarylsulfonium hexafluoroantimonate to anhydrous dimethyl carbonate, stir evenly to obtain a mixed solution; apply the mixed solution on the surface of a high-temperature mesh belt having a flexible porous structure coating, place it in a dark environment and ventilate it at room temperature for 12 hours, photocrosslink and cure it under a nitrogen atmosphere for 10 minutes, and photocrosslink and cure it in air for 10 minutes, so as to extend the service life of the high-temperature mesh belt.

[0032] The remaining steps are the same as those in Example 3.

[0033] Comparative Example 1: A processing technology for extending the service life of a high-temperature mesh belt, comprising the following steps: S4: adding 1 g of polyvinylidene fluoride-hexafluoropropylene and 5 g of dibutyl phthalate to acetone, heating to 50-55° C. and stirring for 1-1.5 h to obtain a template liquid; The remaining steps are the same as those in Example 1.

[0034] Comparative Example 2: A processing technology for extending the service life of a high-temperature mesh belt, comprising the following steps: S1: 7.5mmol hexamethyldisiloxane, 35mmol γ-methacryloxypropyltrimethoxysilane, 25mmol tetraethyl silicate, 2.5mmol 1H,1H,2H,2H perfluorooctyltriethoxysilane, 3.5g deionized water, 3g ethanol, and 1mL acetic acid are added to a reaction container, heated to 70°C for reaction for 6h, and evaporated by rotary evaporation to obtain silicone resin A; S2: Add 1 mmol of dimethoxydiphenylsilane to a mixed solvent of xylene and ethanol, add 1 wt% of dilute phosphoric acid, heat to 65-70°C for reaction for 3-3.5 hours, add 1 mmol of γ-methacryloxypropyltrimethoxysilane, keep warm for reaction for 3-3.5 hours, and obtain silicone resin B; S3: Add 100 g of silicone resin B, 1 g of 2-ureido-4[1H]-pyrimidinone derivative and chloroform into a reaction vessel, heat to 90° C. under a nitrogen atmosphere and react for 6-7 hours to obtain silicone resin C; S4: Add 20 parts of silicone resin A, 60 parts of silicone resin B, 20 parts of silicone resin C, 3 parts of fluorinated acryloyloxy POSS, 1.2 parts of photoinitiator 819, and 2.9 parts of triarylsulfonium hexafluoroantimonate into anhydrous dimethyl carbonate, stir evenly to obtain a mixed solution; apply the mixed solution on the surface of the high-temperature mesh belt, place it in a dark environment and ventilate it at room temperature for 12 hours, photocrosslink and cure it in a nitrogen atmosphere for 10 minutes, and photocrosslink and cure it in air for 10 minutes, so as to extend the service life of the high-temperature mesh belt.

[0035] Comparative Example 3: A processing technology for extending the service life of a high-temperature mesh belt, comprising the following steps: the coating thickness is 10 μm; The remaining steps are the same as those in Example 1.

[0036] Comparative Example 4: A processing technology for extending the service life of a high-temperature mesh belt, comprising the following steps: the coating thickness is 40 μm; The remaining steps are the same as those in Example 1.

[0037] Comparative Example 5: A processing technology for extending the service life of a high-temperature mesh belt, comprising the following steps: The amount of the mixed solution applied on the surface of the high-temperature mesh belt having the flexible porous structure coating is such that the pore filling rate of the flexible porous structure coating reaches 150%; The remaining steps are the same as those in Example 1.

[0038] Experiment: Unless otherwise specified, the coating thickness in the above embodiments and comparative examples is 20 μm.

[0039] Corrosion resistance test: The coated high temperature mesh belt is used as the working electrode, and the working electrode area is 10cm 2 , using saturated calomel electrode as reference electrode, platinum sheet as counter electrode, 3.5wt% NaCl solution as corrosion medium, and working temperature of 25±2℃. All electrochemical tests were performed using an electrochemical workstation. The open circuit potential (OCP) was tested first, and then the electrochemical impedance spectroscopy (EIS) was tested after the OCP was stable, ranging from 100kHz to 0.01Hz, with an amplitude of 10mV. The specific immersion time of the sample in 3.5wt% NaCl solution was 21 days.

[0040] Coating toughness test: According to ISO 6860:2006 standard, the coating toughness is tested using a ZQ-II cone bending tester; the substrate is a soft aluminum plate with a size of approximately 75mm×150mm. The toughness of the coating is determined by the crack length of the coating before and after the test, with the best being 0.

[0041] Coating pencil hardness test: The coating hardness is measured by pencil test method according to ISO 15184:2020.42 The pencil hardness of the coating is determined by pressing the pencil lead on the coating surface at an angle of 45°, applying a load of 7.35N and pushing the pencil. The pencil hardness of the coating is expressed as the hardness of the hardest pencil that does not cause defects in the coating.

[0042] The experimental data are shown in Table 1 below.

[0043] Table 1 Performance test data of coating processing technology

[0044] Conclusion: The processing technology of the present invention can give the high-temperature mesh belt excellent wear resistance and corrosion resistance, greatly extending the service life of the high-temperature mesh belt.

[0045] In Comparative Example 1, the amount of dibutyl phthalate added was reduced, resulting in reduced coating hardness and reduced wear resistance.

[0046] The lack of template in Comparative Example 2 leads to reduced toughness and wear resistance of the coating.

[0047] In Comparative Example 3, the coating is too thick, resulting in reduced coating toughness and reduced wear resistance.

[0048] In Comparative Example 4, the coating is too thin, resulting in a decrease in the pencil hardness of the coating and a decrease in corrosion resistance.

[0049] In Comparative Example 5, the pore filling rate is increased, and the softer porous support in the top layer cannot dissipate the bending stress, resulting in reduced coating toughness and reduced wear resistance.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A processing technology for extending the service life of a high-temperature mesh belt, characterized in that: The following steps are involved: S1: coating the template liquid on the surface of the high-temperature mesh belt, ventilating at room temperature for 5-10 minutes, soaking the ventilated high-temperature mesh belt in anhydrous ethanol for 15-30 minutes, and drying at room temperature to obtain a high-temperature mesh belt with a flexible porous structure coating; S2: Add silicone resin A, silicone resin B, silicone resin C, fluorinated acryloyloxy POSS, photoinitiator 819, and triarylsulfonium hexafluoroantimonate into anhydrous dimethyl carbonate, stir evenly, and obtain a mixed solution; apply the mixed solution on the surface of a high-temperature mesh belt having a flexible porous structure coating, place it in a dark environment and ventilate it at room temperature for 12-24 hours, photocrosslink and cure it in a nitrogen atmosphere for 10-15 minutes, and photocrosslink and cure it in air for 10-15 minutes, so as to extend the service life of the high-temperature mesh belt; The template liquid is prepared from polyvinylidene fluoride-hexafluoropropylene and dibutyl phthalate; The silicone resin A is prepared from hexamethyldisiloxane, γ-methacryloxypropyltrimethoxysilane, tetraethyl silicate, and 1H,1H,2H,2H perfluorooctyltriethoxysilane; The silicone resin B is prepared from dimethoxydiphenylsilane and γ-methacryloxypropyltrimethoxysilane; The silicone resin C is prepared from silicone resin B and a 2-ureido-4[1H]-pyrimidinone derivative.

2. A processing technology for extending the service life of a high-temperature mesh belt according to claim 1, characterized in that: The method for preparing the template liquid comprises the following steps: adding polyvinylidene fluoride-hexafluoropropylene and dibutyl phthalate into acetone, heating to 50-55° C. and stirring for 1-1.5 hours to obtain the template liquid; wherein the mass ratio of polyvinylidene fluoride-hexafluoropropylene to dibutyl phthalate is 1:(10-15).

3. A processing technology for extending the service life of a high-temperature mesh belt according to claim 1, characterized in that: The preparation method of the silicone resin A comprises the following steps: adding hexamethyldisiloxane, γ-methacryloxypropyltrimethoxysilane, tetraethyl silicate, 1H,1H,2H,2H perfluorooctyltriethoxysilane, deionized water, ethanol and acetic acid into a reaction container, heating to 70-75° C. for reaction for 6-8 hours, and rotary evaporation to obtain silicone resin A; During the preparation of silicone resin A, the molar ratio of hexamethyldisiloxane:γ-methacryloxypropyltrimethoxysilane:tetraethyl silicate:1H,1H,2H,2H perfluorooctyltriethoxysilane is 7.5:35:25:2.

5.

4. A processing technology for extending the service life of a high-temperature mesh belt according to claim 1, characterized in that: The preparation method of silicone resin B comprises the following steps: adding dimethoxydiphenylsilane to a mixed solvent of xylene and ethanol, adding 1wt% of dilute phosphoric acid, heating to 65-70°C for reaction for 3-3.5h, adding γ-methacryloxypropyltrimethoxysilane, keeping the temperature for reaction for 3-3.5h, and obtaining silicone resin B; In the process of silicone resin B, the molar ratio of dimethoxydiphenylsilane:γ-methacryloxypropyltrimethoxysilane is 1:(1-5).

5. The processing technology for extending the service life of a high-temperature mesh belt according to claim 1 is characterized in that: The preparation method of the silicone resin C comprises the following steps: adding silicone resin B, 2-ureido-4[1H]-pyrimidinone derivative and chloroform into a reaction container, heating to 90-92° C. under a nitrogen atmosphere for reaction for 6-7 hours to obtain silicone resin C; During the preparation of silicone resin C, the mass ratio of silicone resin B: 2-ureido-4[1H]-pyrimidinone derivative is 100:(1-2).

6. A processing technology for extending the service life of a high-temperature mesh belt according to claim 5, characterized in that: The preparation method of the 2-ureido-4[1H]-pyrimidinone derivative comprises the following steps: adding 2-amino-4-hydroxy-6-methylpyridine and hexamethylene diisocyanate into a reaction container, heating to 90-92° C. under a nitrogen atmosphere for reaction for 24-26 hours, cooling to room temperature, adding n-hexane, stirring for 1-1.5 hours, filtering, and vacuum drying to obtain the 2-ureido-4[1H]-pyrimidinone derivative; In the preparation process of 2-ureido-4[1H]-pyrimidinone derivatives, the molar ratio of 2-amino-4-hydroxy-6-methylpyridine to hexamethylene diisocyanate is 1:(7.4-7.6).

7. The processing technology for extending the service life of a high-temperature mesh belt according to claim 1 is characterized in that: The preparation method of the fluorinated acryloyloxy POSS comprises the following steps: adding epoxy acryloyloxy POSS, poly (perfluoroisopropylene oxide) with terminal carboxyl group, tetrabutylammonium bromide, trifluorotoluene, and 1,4-dioxane into a reaction container, heating to 105-110° C. for reaction for 18-20 hours, cooling to room temperature, centrifuging, extracting with deionized water, drying the organic layer with magnesium sulfate, filtering, rotary evaporation, dissolving the product in anhydrous dimethyl carbonate, filtering, and vacuum drying to obtain the fluorinated acryloyloxy POSS; In the preparation process of fluorinated acryloyloxy POSS, the molar ratio of epoxy acryloyloxy POSS: terminal carboxyl poly(perfluoroisopropylene oxide) is (2.1-2.4):(0.12-0.14).

8. A processing technology for extending the service life of a high-temperature mesh belt according to claim 7, characterized in that: The preparation method of the epoxy acryloyloxy POSS comprises the following steps: adding γ-glycidyloxypropyl trimethoxysilane, γ-methacryloyloxypropyl trimethoxysilane, tetramethylammonium hydroxide, triethylamine and toluene into a reaction container, heating to reflux reaction for 72 hours under a nitrogen atmosphere, washing, vacuum drying and purifying to obtain the epoxy acryloyloxy POSS; During the preparation of epoxyacryloxy POSS, the molar ratio of γ-glycidyloxypropyltrimethoxysilane:γ-methacryloxypropyltrimethoxysilane was 2:

6.

9. The processing technology for extending the service life of a high-temperature mesh belt according to claim 1 is characterized in that: In step S1, the template liquid is coated to a thickness of 20-30 μm.

10. The processing technology for extending the service life of a high-temperature mesh belt according to claim 1, characterized in that: In step S2, the proportions of the raw materials of each component in the mixed solution are calculated by mass: 20-40 parts of silicone resin A, 60-80 parts of silicone resin B, 20-40 parts of silicone resin C, 3-9 parts of fluorinated acryloyloxy POSS, 2.9-3.4 parts of photoinitiator 819, and 1.2-1.6 parts of triarylsulfonium hexafluoroantimonate; the amount of the mixed solution coated on the surface of the high-temperature mesh belt having a flexible porous structure coating is such that the pore filling rate of the flexible porous structure coating reaches 100%.

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