A carbon nanometer polymer coating for preventing adhesion and a preparation method and application thereof

Abstract

The application belongs to the technical field of nanometer composite coatings, and specifically provides a carbon nanometer polymer coating for preventing dust sticking and a preparation method and application thereof.The carbon nanometer polymer coating for preventing dust sticking comprises the following raw materials: epoxy resin, polytetrafluoroethylene, reinforcing medium, filler, additive and curing agent;the reinforcing medium is prepared by mixing polyurethane, modified cyclodextrin and graphene, so that the stacking between the graphenes is reduced and the graphenes are effectively dispersed.The carbon nanometer polymer coating for preventing dust sticking prepared by the application has the advantages of wear resistance and corrosion resistance.

Description

Technical Field

[0001] This application belongs to the field of nanocomposite coating technology, and in particular relates to an anti-sticking ash carbon nanopolymer coating, its preparation method, and its application. Background Technology

[0002] Nanopolymer coatings are functional coatings formed by combining nanofillers and resin matrices through specific processes. Their core strength stems from the performance advantages of nanofiller-resin composite materials. Nanofillers, with their high specific surface area and unique interfacial effects, can significantly improve the mechanical and chemical stability of the resin matrix, enabling the composite material to exhibit superior mechanical properties and stability compared to traditional materials. The extended application of these composite materials in the coatings field has given rise to nanopolymer coatings. These coatings form a protective layer on the substrate surface, effectively resisting external wear, chemical corrosion, and other damage, and are widely applicable in fields with high requirements for surface protection.

[0003] In the bearing industry, the application of nanopolymer coatings offers a new approach to solving bearing failure problems. As a core component of mechanical transmission, bearings are subjected to friction, loads, and complex media environments for extended periods, placing stringent requirements on surface wear resistance, corrosion resistance, and fatigue resistance. Nanopolymer coatings can optimize the coating's friction coefficient, hardness, and corrosion resistance by controlling the type and content of nanofillers. This reduces wear during bearing operation, delays performance degradation caused by corrosion, and ultimately extends bearing life, improving the overall operational stability of mechanical equipment. Therefore, they demonstrate excellent application potential in precision bearings, heavy-duty bearings, and other applications.

[0004] However, the application of nanopolymer coatings in bearings still faces key technical challenges, mainly focusing on two aspects: coating curing shrinkage cracks and nanofiller dispersion. During the coating curing process, the cross-linking reaction of the resin matrix is ​​accompanied by volume shrinkage. The resulting shrinkage stress causes cracks to form inside the coating or at the interface. These cracks can damage the integrity of the coating, becoming channels for corrosive media to penetrate and reducing its wear resistance and corrosion protection performance. At the same time, due to their high surface energy, nanofillers are prone to agglomeration in the resin matrix, leading to uneven dispersion. This not only causes fluctuations in coating performance and the emergence of areas with weak wear and corrosion resistance, but may also affect the bonding strength between the coating and the bearing substrate. These problems will restrict the further application of coatings in the bearing field. Therefore, how to prepare nanopolymer coatings with excellent wear resistance and corrosion resistance is a problem that we need to seriously consider. Summary of the Invention

[0005] To address the aforementioned issues and further improve the wear resistance and corrosion resistance of the coating, this application provides an anti-sticking ash carbon nanopolymer coating, its preparation method, and its application.

[0006] In a first aspect, this application provides an anti-sticking gray carbon nanopolymer coating, comprising the following raw materials in parts by weight: 50-70 parts epoxy resin, 6-10 parts polytetrafluoroethylene, 5-8 parts reinforcing medium, 12-15 parts filler, 4-9 parts additives, and 20-25 parts curing agent.

[0007] The preparation method of the reinforcing medium includes the following steps: adding polyurethane to a mixed solvent and stirring until the polyurethane dissolves; then adding modified cyclodextrin and graphene, mixing evenly, spin-coating on a silicon wafer, drying to obtain a film, and then pulverizing and grinding to obtain the reinforcing medium.

[0008] The modified cyclodextrin is prepared by grafting cyclodextrin with aromatic sulfonyl chloride, incorporating it with polypropylene glycol, and then capping it with terminal amino molecules.

[0009] Furthermore, the preparation method of the modified cyclodextrin includes the following steps: cyclodextrin and deionized water are mixed, sodium hydroxide aqueous solution is added and stirred, the temperature is adjusted, p-toluenesulfonyl chloride is added to carry out a substitution reaction, the mixture is filtered, the resulting solid component is dried and mixed with deionized water, followed by the addition of polypropylene glycol, magnetic stirring, centrifugation, washing, drying, and then mixing with diethylenetriamine. After reacting for a period of time, glycerol and ethylenediamine are added sequentially. After the reaction is completed, the mixture is centrifuged to obtain the modified cyclodextrin.

[0010] Furthermore, the mass ratio of the mixed solvent, polyurethane and modified cyclodextrin is (10-12):1:(0.2-0.3).

[0011] Furthermore, the mixed solvent is obtained by mixing N,N-dimethylformamide and tetrahydrofuran at a volume ratio of 1:(0.8-1).

[0012] Furthermore, the spin coating process parameters are as follows: spin coating at a speed of 500 r / min for 8-12 seconds, then adjust the speed to 2100 r / min and spin coating for 30-35 seconds.

[0013] Furthermore, the mass ratio of the cyclodextrin to p-toluenesulfonyl chloride is 1:(0.2-0.5).

[0014] Furthermore, the substitution reaction is carried out at a temperature of 0-4°C for a time of 4-6 hours.

[0015] Furthermore, the filler includes silicon carbide, molybdenum disulfide, and talc.

[0016] And / or, the additives include defoamers, leveling agents, and anti-aging agents.

[0017] Secondly, this application provides a method for preparing an anti-sticking carbon nanopolymer coating, comprising the following steps: taking epoxy resin, polytetrafluoroethylene, reinforcing medium, filler, additives, and curing agent, mixing them evenly, coating, and drying.

[0018] Thirdly, this application provides an application of an anti-sticking ash carbon nanopolymer coating, which is used in bearings to repair and protect bearings from defects caused by fretting wear, scouring wear, and localized corrosion.

[0019] Compared with the prior art, this application has the following beneficial effects:

[0020] 1. In modified cyclodextrin, polyethylene glycol is hyperbranched at the terminal amino groups. During the coating curing process, the terminal amino groups react with epoxy resin and participate in the resin curing, allowing the reinforcing medium to be tightly inserted into the resin, improving the interfacial bonding force between the reinforcing medium and the resin, while reducing curing shrinkage, improving the coating density, and giving the coating good corrosion resistance.

[0021] 2. After grafting with p-toluenesulfonyl chloride, the cyclodextrin enhances the bonding force between the modified cyclodextrin and graphene through π-π interactions, which is beneficial for its adhesion to the graphene surface and reduces adhesive wear between graphene sheets. At the same time, the polyrotaxane structure of the modified cyclodextrin consumes stress through molecular slippage during friction, further improving the wear resistance of the coating. Attached Figure Description

[0022] Figure 1 The adhesion characterization data of the coatings of Examples 1-3 and Control Groups 1-2 of this application before and after immersion in sodium chloride solution are presented. Detailed Implementation

[0023] To make the inventive objectives, technical solutions, and beneficial technical effects of this application clearer, the following detailed description is provided in conjunction with embodiments, clearly and completely describing the technical solutions in the embodiments of this application. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] When using “including,” “having,” and “contains” as described herein, the intention is to cover non-exclusive inclusion, unless an explicit qualifying term such as “only,” “consisting of,” etc., is used, in which case another component may be added.

[0026] The terms "preferred," "more preferably," "better," and "even better" used in this application refer to embodiments of this application that provide certain beneficial effects under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the description of one or more preferred embodiments does not imply that other embodiments are unavailable, nor is it intended to exclude other embodiments from the scope of this application. That is, in this application, "preferred," "more preferably," "better," and "even better" are merely descriptions of implementations or embodiments with better effects, but do not constitute a limitation on the scope of protection of this application.

[0027] In this application, terms such as "further," "even more," and "particularly" are used for descriptive purposes and indicate differences in content, but should not be construed as limiting the scope of protection of this application.

[0028] In this application, "at least one" means one or more, such as one, two, or more. "Multiple" or "several" means at least two, such as two, three, etc., and "multi-layered" means at least two layers, such as two layers, three layers, etc., unless otherwise explicitly specified. In the description of this application, "several" means at least one, such as one, two, etc., unless otherwise explicitly specified.

[0029] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0030] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, the method comprising steps (a) and (b) indicates that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0031] In this application, "above" or "below" includes the number itself. For example, "below 1" includes 1.

[0032] In this application, room temperature refers to 0-40°C, including but not limited to 10-40°C, or further to 20-30°C.

[0033] The present application will be further illustrated by the following examples, but these examples do not limit the scope of the present application.

[0034] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in this application, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. All reagents or instruments whose manufacturers are not specified are conventional products that can be purchased commercially. In addition to the specific methods, equipment, and materials used in the embodiments, based on the knowledge of the prior art possessed by one of ordinary skill in the art and the description in this application, any prior art methods, equipment, and materials similar to or equivalent to those described, used, or made by the methods, equipment, and materials in the embodiments of this application may be used to implement this application.

[0035] Example 1

[0036] The preparation method of the anti-sticking carbon nanopolymer coating in this embodiment is as follows: 140g of epoxy resin E51, 12g of polytetrafluoroethylene, 10g of silicon carbide, 20g of molybdenum disulfide, 5g of talc, 2g of defoamer BYK-1810, 4g of leveling agent BETTERSOL 3896, 3g of anti-aging agent Irganox 1076, 16g of reinforcing medium, and 50g of T-31 curing agent are mixed at room temperature and magnetically stirred for 50 minutes. Then, the uniformly mixed coating is placed in a vacuum drying oven, and a vacuum is drawn at room temperature to remove air bubbles from the coating. The coating is then evenly brushed onto the surface of Q235 carbon steel using a manual brushing method. After brushing, the coating is cured in a 50℃ forced-air drying oven for 10 hours, then removed and cured at room temperature for another 6 hours.

[0037] The preparation method of the reinforcing medium in this embodiment is as follows:

[0038] 1) Add 6g of β-cyclodextrin to a three-necked flask, add 200g of deionized water, stir for 10min, then add 10mL of 35% sodium hydroxide aqueous solution at a rate of 1mL / min. Continue stirring for 30min, then adjust the temperature to 0℃. Next, add a mixture of 3g of p-toluenesulfonyl chloride and 12mL of acetonitrile dropwise at a rate of 0.5mL / min. After the addition is complete, maintain the temperature for 6h. After the reaction is complete, add 9.5% hydrochloric acid aqueous solution to adjust the pH of the system to 6, filter, and the obtained solid component is... After drying, the product was placed in a beaker, 220g of deionized water was added, the temperature was adjusted to 60℃, and the mixture was stirred for 1 hour. Then, 7g of polypropylene glycol (Mn=1000) was added, and the mixture was magnetically stirred for 30 minutes. After cooling to room temperature, the mixture was stirred for another 24 hours. The product was centrifuged, washed with water, and vacuum dried at 35℃ for 10 hours. The dried product was then placed in a reaction vessel, and 3g of diethylenetriamine was added under a nitrogen atmosphere. The temperature was raised to 80℃ and the reaction was carried out for 2 hours. Then, 2.5g of glycerol was added and the reaction was carried out for 2 hours. Finally, 3.5g of ethylenediamine was added and the reaction was carried out for 3 hours. After the reaction was completed, the product was centrifuged to obtain modified cyclodextrin.

[0039] 2) Weigh 24g of a mixed solvent consisting of N,N-dimethylformamide and tetrahydrofuran into a beaker. The volume ratio of N,N-dimethylformamide to tetrahydrofuran is 1:0.9. Then add 2g of polyurethane 1185A and stir until polyurethane 1185A is dissolved. Then add 0.6g of modified cyclodextrin and 0.4g of graphene. After mixing evenly, spin-coat the mixture onto a silicon wafer. The spin coater speed is 500r / min and the time is 12s. Then adjust the speed to 2100r / min and the time to 30s. After spin coating, place the wafer in an oven to dry for 1h. Crush and grind the resulting film to obtain a reinforcing medium with an average particle size of 3μm.

[0040] Example 2

[0041] The preparation method of the anti-sticking carbon nanopolymer coating in this embodiment is as follows: 100g epoxy resin E51, 20g polytetrafluoroethylene, 8g silicon carbide, 10g molybdenum disulfide, 6g talc powder, 1g defoamer BYK-1810, 2g leveling agent BETTERSOL 3896, 1g anti-aging agent Irganox 1076, 10g reinforcing medium, and 40g T-31 curing agent are mixed at room temperature and magnetically stirred for 40 minutes. Then, the uniformly mixed coating is placed in a vacuum drying oven, and a vacuum is drawn at room temperature to remove air bubbles from the coating. The coating is then evenly brushed onto the surface of Q235 carbon steel using a manual brushing method. After brushing, the coating is cured in a 50℃ forced-air drying oven for 10 hours, then removed and cured at room temperature for another 6 hours.

[0042] The preparation method of the reinforcing medium in this embodiment is as follows:

[0043] 1) Add 6g of β-cyclodextrin to a three-necked flask, add 200g of deionized water, stir for 10min, then add 10mL of 35% sodium hydroxide aqueous solution at a rate of 1mL / min. Continue stirring for 30min, then adjust the temperature to 4℃. Next, add a mixture of 1.2g of p-toluenesulfonyl chloride and 10mL of acetonitrile dropwise at a rate of 0.5mL / min. After the addition is complete, maintain the temperature for 4h. After the reaction is complete, add 9.5% hydrochloric acid aqueous solution to adjust the pH of the system to 6, filter, and obtain the solid component. After drying, the product was placed in a beaker, 200g of deionized water was added, the temperature was adjusted to 50℃, and the mixture was stirred for 1 hour. Then, 7g of polypropylene glycol (Mn=1000) was added, and the mixture was magnetically stirred for 30 minutes. After cooling to room temperature, the mixture was stirred for another 24 hours. The product was centrifuged, washed with water, and vacuum dried at 35℃ for 10 hours. The dried product was placed in a flask, and 3g of diethylenetriamine was added under a nitrogen atmosphere. The temperature was raised to 80℃ and the reaction was carried out for 2 hours. Then, 2.5g of glycerol was added and the reaction was carried out for 2 hours. Finally, 3.5g of ethylenediamine was added and the reaction was carried out for 3 hours. After the reaction was completed, the product was centrifuged to obtain modified cyclodextrin.

[0044] 2) Weigh 20g of a mixed solvent consisting of N,N-dimethylformamide and tetrahydrofuran into a beaker. The volume ratio of N,N-dimethylformamide to tetrahydrofuran is 1:0.8. Then add 2g of polyurethane 1185A and stir until polyurethane 1185A is dissolved. Then add 0.4g of modified cyclodextrin and 0.3g of graphene. After mixing evenly, spin-coat the mixture onto a silicon wafer. The spin coater speed is 500r / min and the time is 8s. Then adjust the speed to 2100r / min and the time to 35s. After spin coating, dry the mixture in an oven for 1h. Crush and grind the obtained film to obtain a reinforcing medium with an average particle size of 3.2μm.

[0045] Example 3

[0046] The preparation method of the anti-sticking carbon nanopolymer coating in this embodiment is as follows: 130g epoxy resin E51, 20g polytetrafluoroethylene, 9g silicon carbide, 15g molybdenum disulfide, 5g talc powder, 1g defoamer BYK-1810, 2.5g leveling agent BETTERSOL 3896, 2g anti-aging agent Irganox 1076, 15g reinforcing medium, and 43g T-31 curing agent are mixed at room temperature and magnetically stirred for 50 minutes. Then, the uniformly mixed coating is placed in a vacuum drying oven, and a vacuum is drawn at room temperature to remove air bubbles from the coating. The coating is then evenly brushed onto the surface of Q235 carbon steel using a manual brushing method. After brushing, the coating is cured in a 50℃ forced-air drying oven for 10 hours, then removed and cured at room temperature for another 6 hours.

[0047] The preparation method of the reinforcing medium in this embodiment is as follows:

[0048] 1) Add 6g of β-cyclodextrin to a three-necked flask, add 200g of deionized water, stir for 10min, then add 10mL of 35% sodium hydroxide aqueous solution at a rate of 1mL / min. Continue stirring for 30min, then adjust the temperature to 2℃. Next, add a mixture of 1.5g of p-toluenesulfonyl chloride and 10mL of acetonitrile dropwise at a rate of 0.5mL / min. After the addition is complete, maintain the temperature for 4.5h. After the reaction is complete, add 9.5% hydrochloric acid aqueous solution to adjust the pH of the system to 6, filter, and obtain the solid group. After drying, the product was placed in a beaker, 200g of deionized water was added, the temperature was adjusted to 60℃, and the mixture was stirred for 1 hour. Then, 7g of polypropylene glycol (Mn=1000) was added, and the mixture was magnetically stirred for 30 minutes. After cooling to room temperature, the mixture was stirred for another 24 hours. The product was centrifuged, washed with water, and vacuum dried at 35℃ for 10 hours. The dried product was placed in a flask, and 3g of diethylenetriamine was added under a nitrogen atmosphere. The temperature was raised to 80℃ and the reaction was carried out for 2 hours. Then, 2.5g of glycerol was added and the reaction was carried out for 2 hours. Finally, 3.5g of ethylenediamine was added and the reaction was carried out for 3 hours. After the reaction was completed, the product was centrifuged to obtain modified cyclodextrin.

[0049] 2) Weigh 23g of a mixed solvent consisting of N,N-dimethylformamide and tetrahydrofuran into a beaker. The volume ratio of N,N-dimethylformamide to tetrahydrofuran is 1:1. Then add 2g of polyurethane 1185A and stir until polyurethane 1185A is dissolved. Then add 0.5g of modified cyclodextrin and 0.3g of graphene. After mixing evenly, spin-coat the mixture onto a silicon wafer. The spin coater speed is 500r / min and the time is 10s. Then adjust the speed to 2100r / min and the time to 32s. After spin coating, dry the mixture in an oven for 1h. Crush and grind the obtained film to obtain a reinforcing medium with an average particle size of 2.9μm.

[0050] Control group 1

[0051] The modified cyclodextrin in this control group was prepared as follows: 6g of β-cyclodextrin was placed in a beaker, 220g of deionized water was added, the temperature was adjusted to 60℃, and the mixture was stirred for 1h. Then, 7g of polypropylene glycol (Mn=1000) was added, and the mixture was magnetically stirred for 30min. After cooling to room temperature, the mixture was stirred for another 24h. The mixture was centrifuged, washed with water, and vacuum dried at 35℃ for 10h. The dried product was placed in a reaction vessel, and 3g of diethylenetriamine was added under a nitrogen atmosphere. The temperature was raised to 80℃ and the reaction was carried out for 2h. Then, 2.5g of glycerol was added and the reaction was carried out for 2h. Finally, 3.5g of ethylenediamine was added and the reaction was carried out for 3h. After the reaction was completed, the mixture was centrifuged to obtain the modified cyclodextrin.

[0052] The remaining steps are the same as in Example 1.

[0053] Control group 2

[0054] The modified cyclodextrin in this control group was prepared as follows: 6g of β-cyclodextrin was placed in a three-necked flask, 200g of deionized water was added, and the mixture was stirred for 10min. 10mL of 35% sodium hydroxide aqueous solution was added at a rate of 1mL / min. After stirring for another 30min, the temperature was adjusted to 0℃. Then, a mixture of 3g of p-toluenesulfonyl chloride and 12mL of acetonitrile was added dropwise at a rate of 0.5mL / min. After the addition was completed, the mixture was kept at a constant temperature for 6h. After the reaction was completed, 9.5% hydrochloric acid aqueous solution was added to adjust the pH of the system to 6. The mixture was filtered, and the resulting solid component was dried and placed in a beaker. 220g of deionized water was added, and the temperature was adjusted to 60℃. The mixture was stirred for 1h, and then 7g of polypropylene glycol (Mn=1000) was added. The mixture was magnetically stirred for 30min, cooled to room temperature, and stirred for another 24h. The mixture was centrifuged, washed with water, and vacuum dried at 35℃ for 10h to obtain the modified cyclodextrin.

[0055] The remaining steps are the same as in Example 1.

[0056] Performance testing

[0057] 1. Preparation of specimens: Following the coating preparation methods in Examples 1-3 and Control Groups 1-2, the coating thickness was controlled to be 210±5μm to obtain specimens.

[0058] 2. Adhesion test: The adhesion of the coating was tested according to the standard GB / T5210-2006. The specimen size was 100mm×100mm×2mm.

[0059] 3. Hardness Test: The hardness of the coating was tested according to standard GB / T6739-2022. The test results are shown in Table 1.

[0060] 4. Corrosion Resistance Test: The specimen was immersed in a 3.5 wt% sodium chloride solution at room temperature for 360 hours. The corrosion resistance of the coating was determined by testing the adhesion of the coating before and after immersion. Test results are as follows: Figure 1 As shown.

[0061] 5. Abrasion Resistance Test: The abrasion resistance of the coating was tested according to standard GB / T1768-2006. During the test, weights were added to each of the two grinding wheels so that the force of a single weight on the coating was 1 kg. The total number of test cycles was 1000. The specimen dimensions were: thickness 2 mm, diameter 100 mm, with a small hole in the center. The test results are shown in Table 1.

[0062] Table 1. Coating performance test data for Examples 1-3 and Control Groups 1-2

[0063]

[0064] Combining Table 1 and Figure 1 Analysis of Examples 1-3 and Control Groups 1-2 shows that the coatings prepared in the examples exhibit good wear resistance and corrosion resistance. Compared to Examples 1-3, in Control Group 1, the modified cyclodextrin did not introduce a benzene ring structure that could interact with graphene during the preparation of the reinforcing medium. The graphene sheets tended to stack together, and the higher contact area increased the adhesive wear between the graphene sheets, failing to effectively improve the wear resistance of the coating. In Control Group 2, compared to Examples 1-3, the polypropylene glycol in the modified cyclodextrin was not end-capped during the preparation of the reinforcing medium. This prevented it from fully utilizing the intermolecular sliding effect and also reduced the density of the bonding between the reinforcing medium and the epoxy resin, which had a certain adverse effect on the wear resistance and corrosion resistance of the coating.

[0065] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An anti-sticking soot carbon nanopolymer coating characterized by: The raw materials include the following components by weight: 50-70 parts of epoxy resin, 6-10 parts of polytetrafluoroethylene, 5-8 parts of reinforcing medium, 12-15 parts of filler, 4-9 parts of auxiliary agent, and 20-25 parts of curing agent; The preparation method of the reinforcing medium comprises the following steps: adding polyurethane into a mixed solvent, stirring until the polyurethane is dissolved, then adding modified cyclodextrin and graphene, uniformly mixing, spin coating on a silicon wafer, drying to obtain a film, and then crushing and grinding to obtain the reinforcing medium; The modified cyclodextrin is prepared by grafting cyclodextrin with aromatic sulfonyl chloride, then performing inclusion with polypropylene glycol, and finally end-capping; The preparation method of the modified cyclodextrin comprises the following steps: mixing cyclodextrin and deionized water, adding an aqueous sodium hydroxide solution and stirring, adjusting the temperature, then adding p-toluenesulfonyl chloride and performing substitution reaction, filtering, drying the obtained solid component, mixing with deionized water, then adding polypropylene glycol, magnetically stirring, centrifuging, washing, drying, mixing with diethylenetriamine, reacting for a period of time, then sequentially adding glycerol and ethylenediamine, centrifuging after the reaction is completed, and obtaining the modified cyclodextrin; The mass ratio of the cyclodextrin to the p-toluenesulfonyl chloride is 1:(0.2-0.5).

2. A carbon nanocoating according to claim 1, wherein: The mass ratio of the mixed solvent, the polyurethane to the modified cyclodextrin is (10-12):1:(0.2-0.3).

3. A carbon nanopolymer coating according to claim 1 or 2, wherein: The mixed solvent is N,N-dimethylformamide and tetrahydrofuran mixed in a volume ratio of 1:(0.8-1).

4. The anti-sticking soot carbon nanopolymer coating of claim 1, wherein: The process parameters of the spin coating are as follows: spin coating at a speed of 500 r / min for 8-12 s, then adjusting the speed to 2100 r / min and spin coating for 30-35 s.

5. The anti-sticking soot carbon nanopolymer coating of claim 1, wherein: The temperature of the substitution reaction is 0-4℃, and the time is 4-6 h.

6. The anti-stiction carbon nanopolymer coating of claim 1, wherein: The filler comprises silicon carbide, molybdenum disulfide, and talc powder. And / or, the auxiliary agent comprises a defoaming agent, a leveling agent, and an anti-aging agent.

7. A process for the preparation of the anti-stiction carbon nanopolymer coating as claimed in claim 1, wherein the process comprises: The method comprises the following steps: mixing epoxy resin, polytetrafluoroethylene, reinforcing medium, filler, auxiliary agent, and curing agent uniformly, coating, and drying.

8. Use of an anti-sticking soot carbon nanopolymer coating, characterized in that: The anti-dust carbon nanopolymer coating as claimed in any one of claims 1-6 is used for bearings to repair and protect defects of the bearings caused by fretting wear, erosion wear, and local corrosion.

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