Ash sticking prevention carbon nano polymer coating as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of nano composite coatings, and particularly provides an anti-dust-sticking carbon nano polymer coating as well as a preparation method and application thereof. The invention relates to an anti-dust-sticking carbon nano polymer coating which comprises the following raw materials: epoxy resin, polytetrafluoroethylene, a reinforcing medium, a filler, an auxiliary agent and a curing agent, the reinforcing medium is prepared by mixing polyurethane, modified cyclodextrin and graphene, so that stacking among graphene is reduced, and the graphene is effectively dispersed. The ash sticking prevention carbon nano polymer coating prepared by the invention has the advantages of abrasion resistance and corrosion resistance.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of nanocomposite coatings, in particular relates to a carbon nanometer polymer coating for preventing adhesion of dust and a preparation method and application thereof. BACKGROUND

[0002] The nanometer polymer coating is a functional coating formed by combining nanofillers and resin matrix through a specific process, and its core lies in the performance advantages of nanofiller-resin composite materials. Due to the characteristics of high specific surface area and special interface effect, the nanofiller can significantly improve the mechanical and chemical stability of the resin matrix, so that the composite material exhibits better performance than traditional materials in terms of mechanical properties and stability. The extension application of such composite materials in the field of coatings has given birth to nanometer polymer coatings, which form a protective layer on the surface of the substrate and effectively resist external abrasion, chemical corrosion and other damages, and are widely used in fields with high requirements for surface protection.

[0003] In the field of bearings, the application of nanometer polymer coatings provides a new path to solve the problem of bearing failure. Bearings, as the core components of mechanical transmission, are long-term in friction, load and complex medium environment, and have strict requirements on surface wear resistance, corrosion resistance and fatigue resistance. The nanometer polymer coating can optimize the friction coefficient, hardness and corrosion resistance of the coating by adjusting the type and content of the nanofiller, reduce the wear and tear during the operation of the bearing, delay the performance degradation caused by corrosion, and thus prolong the service life of the bearing and improve the overall operation stability of the mechanical equipment, so it has good application potential in precision bearings, heavy load bearings and other scenes.

[0004] However, the nanometer polymer coating still faces key technical problems in bearing application, mainly in coating shrinkage cracking and nanofiller dispersion. During the curing process of the coating, the cross-linking reaction of the resin matrix will cause volume shrinkage, and the shrinkage stress will cause cracks in the coating or at the interface. These cracks will damage the integrity of the coating, become a channel for the penetration of corrosive media, and reduce its wear resistance and corrosion resistance; at the same time, the nanofiller is easy to agglomerate in the resin matrix due to its high surface energy, which leads to uneven dispersion, not only causing performance fluctuations in the coating, but also causing local areas with weak wear resistance and corrosion resistance, and may also affect the bonding strength of the coating and the bearing substrate. These problems will restrict the further application of the coating in the field of bearings, so how to prepare a nanometer polymer coating with excellent wear resistance and corrosion resistance is a problem we need to seriously consider. SUMMARY

[0005] In order to further improve the wear resistance and corrosion resistance of the coating, the application provides a carbon nanometer polymer coating for preventing adhesion of dust and a preparation method and application thereof.

[0006] The first aspect of the present application provides a carbon nanometer polymer coating for preventing dust adhesion, comprising the following raw materials 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 using an amino-terminated molecule to cap.

[0007] Further, 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.

[0008] Further, the mass ratio of the mixed solvent, polyurethane and modified cyclodextrin is (10-12):1:(0.2-0.3).

[0009] Further, the mixed solvent is N,N-dimethylformamide and tetrahydrofuran mixed in a volume ratio of 1:(0.8-1).

[0010] Further, the process parameters of 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.

[0011] Further, the mass ratio of the cyclodextrin and p-toluenesulfonyl chloride is 1:(0.2-0.5).

[0012] Further, the temperature of the substitution reaction is 0-4°C, and the time is 4-6 h.

[0013] Further, 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.

[0014] The second aspect of the present application provides a preparation method of a carbon nanometer polymer coating for preventing dust adhesion, comprising the following steps: uniformly mixing epoxy resin, polytetrafluoroethylene, reinforcing medium, filler, auxiliary agent and curing agent, coating, and drying.

[0015] In a third aspect, the application provides an application of the anti-sticking carbon nanometer polymer coating. The anti-sticking carbon nanometer polymer coating is used for bearings to repair and protect defects of the bearings caused by fretting wear, erosion wear and local corrosion.

[0016] Compared with the prior art, the application has the following beneficial effects: 1. The polyethylene glycol in the modified cyclodextrin is capped by hyperbranched end amino groups. During the curing process of the coating, the end amino groups react with the epoxy resin to participate in the curing of the resin, so that the reinforcing medium is tightly inserted into the resin, the interfacial bonding force between the reinforcing medium and the resin is improved, the curing shrinkage is reduced, the compactness of the coating is improved, and the coating has good corrosion resistance.

[0017] 2. After the cyclodextrin is grafted with p-toluenesulfonyl chloride, the binding force between the modified cyclodextrin and graphene is enhanced through π-π interaction, which is conducive to the adhesion of the modified cyclodextrin on the surface of graphene and reduces the adhesive wear between graphene layers. At the same time, the polyrotaxane structure of the modified cyclodextrin consumes stress through molecular slip during the friction process, further improving the wear resistance of the coating. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The adhesion data of the coatings of Examples 1-3 and Control Group 1-2 of the application before and after immersion in a sodium chloride solution. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and beneficial technical effects of the application clearer, the application will be further described in detail below in combination with examples, and the technical scheme in the examples of the application will be clearly and completely described. Obviously, the described examples are only part of the examples of the application, not all examples. Based on the examples in the application, all other examples obtained by those skilled in the art without creative labor belong to the scope of protection of the application.

[0020] 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 the application belongs. The terms used in the specification of the application herein are only for the purpose of describing specific examples and are not intended to limit the application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0021] In the case of using "including", "having", and "containing" described herein, it is intended to cover non-exclusive inclusion, unless the explicit limiting term such as "only", "consisting of" or the like is used, otherwise another component can be added.

[0022] The words "preferably," "more preferably," "most preferably," and the like, in the specification, mean that in certain situations, one embodiment can provide certain benefits, however, other embodiments can also be preferred for the same reasons or for other reasons. Also, the use of these terms does not foreclose from the scope of the application other embodiments that can not include certain of the benefits and features.

[0023] In the specification, the use of the term "further," "furthermore," "in addition," and the like, are used in the sense of "additionally" and not in the sense of "only." Thus, the use of these terms does not foreclose from the scope of the application other embodiments that can not include certain of the benefits and features.

[0024] In the specification, the use of the term "at least" followed by a number of an item, means that the number of the item is one or more. For example, "at least two" means one or more than one. In the specification, the use of the term "at least one" followed by a world, means that the world appears one or more times. For example, "at least one R" means one or more R.

[0025] When a range of values is disclosed, unless otherwise explicitly provided, each intervening value between the the minimum and maximum value of that range is also

[0026] Unless otherwise expressly specified, all steps of the application can be performed in any order. For example, the method comprising steps (a) and (b) means that the method can comprise steps (a) and (b) in sequence, or steps (b) and (a) in sequence. For example, the method can further comprise step (c) means that step (c) can be added to the method in any order. For example, the method can comprise steps (a), (b) and (c), or steps (a), (c) and (b), or steps (c), (a) and (b), etc. Unless otherwise indicated, the singular forms "a," "an," and "the" include plural referents.

[0027] In the specification, the use of "above" or "below" includes the number itself. For example, "below 1" includes 1.

[0028] In the present application, room temperature refers to 0-40℃, including but not limited to 10-40℃, or further 20-30℃.

[0029] The present application is further illustrated by the following examples, but not limited to the scope of the present application.

[0030] When the examples give numerical ranges, it should be understood that, unless otherwise specified in the present application, both endpoints of each numerical range and any number between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art. If the specific conditions are not indicated in the examples, the conventional conditions or the conditions recommended by the manufacturer are used. If the manufacturer of all reagents or instruments is not indicated, it is a conventional product that can be purchased on the market. In addition to the specific methods, devices, materials used in the examples, according to the mastery of the prior art by those skilled in the art and the description of the present application, any method, device and material of the prior art similar or equivalent to the method, device and material described in the examples of the present application can also be used to realize the present application.

[0031] Example 1 The preparation method of the anti-sticking carbon nanopolymer coating of the present example is as follows: 140g of epoxy resin E51, 12g of polytetrafluoroethylene, 10g of silicon carbide, 20g of molybdenum disulfide, 5g of talc powder, 2g of defoaming agent BYK-1810, 4g of leveling agent BETTERSOL 3896, 3g of anti-aging agent Irganox 1076, 16g of reinforcing medium, 50g of T-31 curing agent are mixed at room temperature, and magnetically stirred for 50min. Then the uniformly mixed coating is placed in a vacuum drying oven, vacuumized at room temperature to remove the bubbles in the coating, and the coating is uniformly brushed onto the surface of Q235 carbon steel by manual brushing method. After brushing, it is taken out after curing in a 50℃ air drying oven for 10h, and continues to cure at room temperature for 6h.

[0032] The preparation method of the reinforcing medium of the present example is as follows: 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. 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.

[0033] Example 2 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.

[0034] The preparation method of the reinforcing medium in this embodiment is as follows: 1) Take 6g of β-cyclodextrin into a three-necked flask, add 200g of deionized water, stir for 10min, add 10mL of 35% mass concentration sodium hydroxide aqueous solution at a rate of 1mL / min, continue to stir for 30min, then adjust the temperature to 4℃, then add a mixture of 1.2g of p-toluenesulfonyl chloride and 10mL of acetonitrile at a rate of 0.5mL / min, after the addition is completed, keep the temperature constant for 4h, after the reaction is completed, add 9.5% mass concentration hydrochloric acid aqueous solution to adjust the pH value of the system to 6, filter, and then add the obtained solid component into a beaker, add 200g of deionized water, adjust the temperature to 50℃, stir for 1h, then add 7g of polypropylene glycol (Mn=1000), stir magnetically for 30min, cool to room temperature and continue to stir for 24h, centrifuge, wash with water, and vacuum dry at 35℃ for 10h, then add the dried product into a flask, add 3g of diethylenetriamine under nitrogen atmosphere, heat to 80℃, react for 2h, then add 2.5g of glycerol, react for 2h, finally add 3.5g of ethylenediamine, react for 3h, after the reaction is completed, centrifugal separation is performed to obtain the modified cyclodextrin; 2) Take 20g of a mixed solvent composed 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, stir until the polyurethane 1185A is dissolved, then add 0.4g of the modified cyclodextrin and 0.3g of graphene, mix uniformly, then perform spin coating on a silicon wafer, the rotation speed of the spin coater is 500r / min, the time is 8s, then adjust the rotation speed to 2100r / min, the time is 35s, after the spin coating is completed, place it in an oven for drying for 1h, crush the obtained film, grind, and obtain a reinforcing medium with an average particle size of 3.2μm.

[0035] Example 3 The preparation method of the anti-sticking carbon nanopolymer coating of the present example is as follows: mix 130g of epoxy resin E51, 20g of polytetrafluoroethylene, 9g of silicon carbide, 15g of molybdenum disulfide, 5g of talc powder, 1g of defoamer BYK-1810, 2.5g of leveling agent BETTERSOL 3896, 2g of anti-aging agent Irganox 1076, 15g of reinforcing medium, and 43g of T-31 curing agent at room temperature, magnetically stir for 50min, then place the uniformly mixed coating into a vacuum drying box, vacuumize at room temperature to remove the bubbles in the coating, uniformly brush the coating onto the surface of a Q235 carbon steel by manual brushing, after the brushing is completed, take it out after curing in a 50℃ air drying oven for 10h, and continue to cure at room temperature for 6h.

[0036] The preparation method of the reinforcing medium of the present example is as follows: 1) Take 6g of β-cyclodextrin into a three-necked flask, add 200g of deionized water, stir for 10min, add 10mL of 35% mass concentration sodium hydroxide aqueous solution at a rate of 1mL / min, continue stirring for 30min, then adjust the temperature to 2℃, then add a mixture of 1.5g of p-toluenesulfonyl chloride and 10mL of acetonitrile at a rate of 0.5mL / min, after the addition is completed, keep the temperature constant for 4.5h, after the reaction is completed, add 9.5% mass concentration hydrochloric acid aqueous solution to adjust the pH value of the system to 6, filter, and then add 200g of deionized water into the obtained solid component, adjust the temperature to 60℃, stir for 1h, then add 7g of polypropylene glycol (Mn=1000), stir magnetically for 30min, cool to room temperature and continue to stir for 24h, centrifuge, wash with water, and vacuum dry at 35℃ for 10h, then add the dried product into a flask, add 3g of diethylenetriamine under nitrogen atmosphere, heat to 80℃, react for 2h, then add 2.5g of glycerol, react for 2h, finally add 3.5g of ethylenediamine, react for 3h, after the reaction is completed, centrifugal separation is performed to obtain modified cyclodextrin; 2) Take 23g of a mixed solvent composed 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, stir until the polyurethane 1185A is dissolved, then add 0.5g of modified cyclodextrin and 0.3g of graphene, mix uniformly, then perform spin coating on a silicon wafer, the rotation speed of the spin coater is 500r / min, the time is 10s, then adjust the rotation speed to 2100r / min, the time is 32s, after the spin coating is completed, place it in an oven to dry for 1h, crush the obtained film, grind, and obtain reinforcing medium with an average particle size of 2.9μm.

[0037] Control group 1 The preparation method of the modified cyclodextrin in the control group is as follows: take 6g of β-cyclodextrin into a beaker, add 220g of deionized water, adjust the temperature to 60℃, stir for 1h, then add 7g of polypropylene glycol (Mn=1000), stir magnetically for 30min, cool to room temperature and continue to stir for 24h, centrifuge, wash with water, and vacuum dry at 35℃ for 10h, then add the dried product into a reaction kettle, add 3g of diethylenetriamine under nitrogen atmosphere, heat to 80℃, react for 2h, then add 2.5g of glycerol, react for 2h, finally add 3.5g of ethylenediamine, react for 3h, after the reaction is completed, centrifugal separation is performed to obtain modified cyclodextrin.

[0038] The remaining steps are the same as those in Example 1.

[0039] Control group 2 The preparation method of the modified cyclodextrin in the control group is as follows: 6 g of β-cyclodextrin is put into a three-necked flask, 200 g of deionized water is added, and stirring is performed for 10 min. 10 mL of a 35% mass concentration sodium hydroxide aqueous solution is added at a rate of 1 mL / min, and stirring is continued for 30 min. Then the temperature is adjusted to 0°C, and a mixed solution composed of 3 g of p-toluenesulfonyl chloride and 12 mL of acetonitrile is added dropwise at a rate of 0.5 mL / min. After the dropwise addition is completed, constant temperature reaction is performed for 6 h. After the reaction is completed, a 9.5% mass concentration hydrochloric acid aqueous solution is added to adjust the pH value of the system to 6. Filtration is performed, and the obtained solid component is dried and then put into a beaker. 220 g of deionized water is added, the temperature is adjusted to 60°C, and stirring is performed for 1 h. Then 7 g of polypropylene glycol (Mn=1000) is added, magnetic stirring is performed for 30 min, and then cooling is performed to room temperature and stirring is continued for 24 h. Centrifugation is performed, water washing is performed, and vacuum drying is performed at 35°C for 10 h to obtain the modified cyclodextrin.

[0040] The remaining steps are the same as in Example 1.

[0041] Performance detection 1. Preparation of test pieces: according to the preparation methods of the coatings in Examples 1-3 and Control Group 1-2, the coating thickness is controlled to be 210±5 μm to obtain test pieces.

[0042] 2. Adhesion test: the adhesion of the coating is tested according to the standard GB / T5210-2006. The size of the test piece is 100 mm×100 mm×2 mm.

[0043] 3. Hardness test: the hardness of the coating is tested according to the standard GB / T6739-2022. The test results are shown in Table 1.

[0044] 4. Corrosion resistance test: the test piece is immersed in a 3.5 wt% sodium chloride solution at room temperature for 360 h. The corrosion resistance of the coating is determined by testing the adhesion of the coating before and after immersion. The test results are shown in Table 1. Figure 1

[0045] 5. Wear resistance test: the wear resistance of the coating is tested according to the standard GB / T1768-2006. During the test, weights are added to two grinding wheels so that the force of a single weight on the coating is 1 kg. The total number of test circles is 1000. The size of the test piece is: thickness 2 mm, diameter 100 mm, and a small hole is formed in the center. The test results are shown in Table 1.

[0046] Table 1: Coating performance test data of Examples 1-3 and Control Group 1-2 In combination with Table 1 and Figure 1 ​, analyzing examples 1-3 and control groups 1-2, the coating prepared in the examples has good wear resistance and corrosion resistance; compared with example 1-3, in the preparation of the reinforcing medium in control group 1, the benzene ring structure capable of interacting with graphene is not introduced into the modified cyclodextrin, the graphene sheet layer tends to stack together, the higher contact area increases the adhesion wear between the graphene, which cannot effectively improve the wear resistance of the coating; compared with example 1-3, in the preparation of the reinforcing medium in control group 2, the polypropylene glycol in the modified cyclodextrin is not end-capped, which makes it unable to fully play the role of intermolecular slip, and also reduces the combination density of the reinforcing medium and epoxy resin, which has certain adverse effects on the wear resistance and corrosion resistance of the coating.

[0047] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A non-sticking carbon nanopolymer coating, characterized in that: The raw materials include the following 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. The preparation method of the reinforcing medium includes the following steps: adding polyurethane to a mixed solvent and stirring until the polyurethane is dissolved; 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. The modified cyclodextrin is prepared by grafting cyclodextrin with aromatic sulfonyl chloride, then incorporating it with polypropylene glycol, and finally capping the ends.

2. The anti-sticking carbon nanopolymer coating according to claim 1, characterized in that: 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.

3. The anti-sticking carbon nanopolymer coating according to claim 1, characterized in that: The mass ratio of the mixed solvent, polyurethane and modified cyclodextrin is (10-12):1:(0.2-0.3).

4. The anti-sticking carbon nanopolymer coating according to claim 1 or 3, characterized in that: The mixed solvent is obtained by mixing N,N-dimethylformamide and tetrahydrofuran at a volume ratio of 1:(0.8-1).

5. The anti-sticking carbon nanopolymer coating according to claim 1, characterized in that: 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.

6. The anti-sticking carbon nanopolymer coating according to claim 2, characterized in that: The mass ratio of the cyclodextrin to p-toluenesulfonyl chloride is 1:(0.2-0.5).

7. The anti-sticking carbon nanopolymer coating according to claim 2, characterized in that: The substitution reaction is carried out at a temperature of 0-4℃ for 4-6 hours.

8. The anti-sticking carbon nanopolymer coating according to claim 1, characterized in that: The filler includes silicon carbide, molybdenum disulfide, and talc. And / or, the additives include defoamers, leveling agents, and anti-aging agents.

9. A method for preparing an anti-sticking carbon nanopolymer coating, characterized in that: The process includes the following steps: Take epoxy resin, polytetrafluoroethylene, reinforcing medium, filler, additives, and curing agent, mix them evenly, apply the mixture, and let it dry.

10. The application of an anti-sticking carbon nanopolymer coating, characterized in that: The anti-sticking carbon nanopolymer coating as described in any one of claims 1-8 is used on bearings to repair and protect bearings from defects caused by fretting wear, scouring wear, and localized corrosion.

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