Fluorescent fluorine-containing lubricating grease and preparation method thereof

Abstract

The invention discloses fluorescent fluorine-containing lubricating grease and a preparation method thereof, and belongs to the technical field of lubricating materials, the fluorescent fluorine-containing lubricating grease comprises the following components by weight: 50-75wt% of fluorine-containing base oil; 20 to 45 wt% of a thickening agent; 1 to 10 weight percent of modified ZnO quantum dots; the modified ZnO quantum dots are fluorescent ZnO quantum dots modified by a fluorine-containing silane coupling agent, the preparation process of the modified ZnO quantum dots is simple, the modified ZnO quantum dots can be uniformly dispersed in fluorine-containing lubricating grease as an additive, the structural strength of a thickening agent can be optimized, and the colloidal stability can be improved. The fluorescent fluorine-containing lubricating grease disclosed by the invention has excellent photoluminescence characteristics, the smearing result can be presented in a visual effect, monitoring and positioning are facilitated, and the fluorescent fluorine-containing lubricating grease is excellent in comprehensive performance and can be widely applied to various machines and devices.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating materials, and in particular to a fluorescent fluorine-containing lubricating grease and a preparation method thereof. Background Art

[0002] Grease, as a solid to semi-fluid medium with lubrication, protection and sealing functions, is widely used in various mechanical equipment and devices. The research and development of new greases can meet the ever-changing needs of modern industry and promote the continuous progress of lubrication technology. Fluorinated grease is generally a high-temperature grease made by thickening polytetrafluoroethylene (PTFE) micropowder with fluorinated base oil (perfluoropolyether oil, fluorosilicone oil, etc.) and adding special additives. Fluorinated base oil and PTFE are both inert polymers, and additives play a key role in the function of grease. Fluorinated grease generally has the advantages of excellent thermal stability, chemical inertness, radiation resistance, low saturated vapor pressure, good lubricity, etc.

[0003] However, fluorinated greases generally have poor colloidal stability, easy oil separation, and the friction and anti-wear performance needs to be further improved. In addition, greases are difficult to effectively monitor and inspect in working environments with insufficient light. If greases have high-intensity fluorescence characteristics, it will be helpful to observe and evaluate their working conditions. Some researchers have conducted research on the above-mentioned problems. For example, a Chinese patent document with publication number CN114426902A discloses a grease. In order to solve the problem that the coating quality of existing greases cannot be accurately inspected, the invention develops a grease whose components include perfluoropolyether oil, thickener polytetrafluoroethylene and diphenylethylene-type fluorescent agent, so that the coating result of the grease can be presented in a visual effect; a Chinese patent document with publication number CN116064186A discloses a self-warning grease, which includes a base oil: 70-95% by weight; a thickener: 4-30% by weight; an additive: 1-10% by weight; the additive includes an oxidation indicator and an optional antioxidant, wherein the oxidation indicator is a specific tetraaryl substituted pyrrole; the invention introduces tetraaryl substituted pyrrole, and can judge through the change of fluorescence that the grease in use has begun to oxidize and needs to be replaced, thereby obtaining a self-warning grease. The additives in the above-mentioned greases have expanded and improved the performance requirements of the greases to a certain extent, but they are all organic additives and have limited effect on improving the friction and anti-wear properties of fluorinated greases.

[0004] Inorganic nanomaterials have a large specific surface area and unique optical properties, and are also used in friction reduction and anti-wear. However, fluorinated base oils usually have very low surface energy and high viscosity. Inorganic nanomaterials tend to agglomerate in fluorinated greases, making it difficult to achieve uniform dispersion. The organic-inorganic interface compatibility of the prepared greases is extremely poor, and the overall performance cannot meet the application requirements. Summary of the invention

[0005] In order to solve the deficiencies existing in the above-mentioned prior art, the present invention provides a fluorescent fluorine-containing grease, which has a simple preparation process, readily available raw materials, and has good fluorescent properties, colloid stability and lubrication and wear-reducing properties.

[0006] The specific technical solutions adopted are as follows:

[0007] A fluorescent fluorine-containing lubricating grease comprising the following components by weight percentage:

[0008] Fluorine-containing base oil 50-75wt%;

[0009] Thickener 20-45wt%;

[0010] Modified ZnO quantum dots 1-10wt%;

[0011] The modified ZnO quantum dots are fluorescent ZnO quantum dots modified by a fluorinated silane coupling agent, and the fluorinated silane coupling agent includes heptadecafluorodecyltrimethoxysilane, heptadecafluorodecyltriethoxysilane, tridecafluorooctyltrimethoxysilane, tridecafluorooctyltriethoxysilane, dodecafluoroheptylpropyltrimethoxysilane, nonafluorohexyltrimethoxysilane, trifluoropropyldimethoxymethylsilane, hexafluoropolyether siloxane or nonafluoropolyether siloxane.

[0012] The grease of the present invention adopts modified ZnO quantum dots as special additives. The modified ZnO quantum dots are fluorescent ZnO quantum dots modified by a fluorine-containing silane coupling agent. The modified ZnO quantum dots have good interface compatibility with fluorine-containing base oils and good dispersibility in the grease. They not only give the grease photoluminescent properties, but also have a nano-lubricating effect, effectively reducing the friction coefficient of the grease and enhancing its anti-friction and anti-wear properties.

[0013] Furthermore, the fluorine-containing base oil is at least one of a perfluoropolyether base oil and a fluorosilicone base oil.

[0014] Preferably, the kinematic viscosity of the perfluoropolyether base oil at 20°C is 20 to 4000 mm 2 / s, preferably 100 to 1500 mm 2 / s.

[0015] Preferably, the kinematic viscosity of the fluorosilicone base oil at 20°C is 20 to 4000 mm 2 / s, preferably 100 to 1500 mm 2 / s.

[0016] The viscosity of the base oil will affect the consistency, high and low temperature performance and colloid stability of the grease. If the base oil viscosity is too high, it will increase the difficulty of dispersing the thickener and additives, which is not conducive to the formation of the grease structure and will reduce its anti-friction and anti-wear properties and fluorescence uniformity; if the base oil viscosity is too low, the grease will evaporate greatly under high temperature conditions, affecting the high-temperature service life of the grease; select a base oil with moderate viscosity to balance the dispersion performance, anti-friction and anti-wear properties, and high-temperature stability, so that the prepared grease has good fluorescence characteristics, colloid stability and lubrication and anti-friction properties.

[0017] Furthermore, the thickener is PTFE powder, and the particle size of the PTFE powder is 0.1 to 200 μm, preferably 1 to 15 μm.

[0018] Preferably, the particle size of the fluorescent ZnO quantum dots is 2 to 50 nm, more preferably 4 to 20 nm.

[0019] Preferably, the fluorescent fluorine-containing grease comprises the following components by weight percentage:

[0020] Fluorine-containing base oil 55-70wt%;

[0021] Thickener 25-40wt%;

[0022] Modified ZnO quantum dots 1-5wt%.

[0023] The present invention also provides a method for preparing the fluorescent fluorine-containing grease, comprising the following steps:

[0024] (1) mixing a fluorescent ZnO quantum dot sol, a dispersing aid, a fluorinated silane coupling agent and water, and heating the mixture to react to obtain a mixed solution containing modified ZnO quantum dots;

[0025] (2) adding a fluorine-containing base oil to the mixed solution containing the modified ZnO quantum dots, mixing thoroughly, and removing and recovering the dispersing aid, sol solvent and water therein;

[0026] (3) Add a thickener to the mixed solution obtained in step (2), stir, degas, and grind to obtain the fluorescent fluorinated grease.

[0027] The dispersing aid can extract the fluorinated ZnO during the modification process, inhibit its agglomeration, and enable it to be better dispersed in the subsequently added fluorinated base oil.

[0028] Furthermore, the dispersing aid is a fluorine-containing solvent, including at least one of perfluorooctane, perfluoroheptane, hexafluoropropylene dimer, hexafluoropropylene trimer, hexafluoroisopropanol, perfluorobutyl methyl ether, 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, perfluorobutyltetrahydrofuran, and hexafluorobenzene.

[0029] Preferably, in step (1), the temperature is raised to 40-80° C. and the reaction is carried out for 2-10 hours.

[0030] Preferably, the dispersing aid is perfluorobutyl methyl ether, and the content of the fluorescent ZnO quantum dots in the fluorescent ZnO quantum dot sol is 2-20wt%; the fluorescent ZnO quantum dots can be purchased or synthesized.

[0031] Further preferably, the method for preparing the fluorescent ZnO quantum dots is: preparing an ethanol solution of zinc acetate dihydrate, slowly adding a potassium hydroxide ethanol solution thereto under stirring, and then adding n-hexane to precipitate the fluorescent ZnO quantum dots from the mixed solution.

[0032] Furthermore, in step (1), water is a modification aid, which can promote the hydrolysis of the fluorinated silane coupling agent to generate silanols, and the silanols then react with the hydroxyl groups on the surface of the ZnO quantum dots to form chemical bonds, thereby accelerating the fluorination modification reaction of the ZnO quantum dots.

[0033] Furthermore, the dispersion aid, sol solvent and water are removed by vacuum distillation.

[0034] Preferably, in step (3), mechanical stirring is used for stirring, the stirring temperature is 60-120° C., the stirring speed is 100-2000 rpm, and the stirring time is 1-4 h; and / or vacuum degassing is used for degassing; and / or grinding is performed using a three-roll mill.

[0035] The present invention in-situ modifies fluorescent ZnO quantum dots in a fluorine-containing dispersing aid medium, effectively improves its dispersibility and stability, enhances its fluorescence performance, realizes its nano-lubricating effect, and improves the comprehensive performance of the grease.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] (1) The fluorescent fluorinated grease prepared by the present invention has excellent photoluminescence properties and has obvious and uniform fluorescence under ultraviolet light. The modified ZnO quantum dots have good thermal stability and fluorescence intensity, so that the grease can maintain its fluorescence properties even under high temperature conditions. This is beneficial to the use and monitoring of the grease under low light conditions, and can also quickly locate the position of grease leakage, so as to deal with it in time and improve work efficiency.

[0038] (2) The method of the present invention utilizes a fluorinated silane coupling agent to perform surface chemical modification on the fluorescent ZnO quantum dots, thereby improving their dispersibility and compatibility in fluorinated greases, optimizing the structural strength of the thickener, enhancing the ability of the grease skeleton structure to adsorb base oil, and improving its colloidal stability, which is beneficial for the use of the grease under high temperature conditions, reduces oil separation, and prolongs its service life.

[0039] (3) In the process of preparing modified ZnO quantum dots, the method of the present invention uses a fluorine-containing dispersing aid as a dispersing medium, which effectively inhibits the agglomeration of the fluorinated ZnO quantum dots, makes their dispersion uniform and stable, retains the nano-lubricating effect, effectively reduces the friction coefficient of the grease, and enhances its anti-friction and anti-wear properties, which is beneficial to improving the operating efficiency and service life of mechanical equipment.

[0040] (4) The raw materials of the fluorescent fluorine-containing grease of the present invention are low-cost and non-toxic, the preparation process is simple and easy to operate, and the reaction conditions are mild. The obtained fluorescent fluorine-containing grease has excellent comprehensive performance and can be widely used in various machines and devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a fluorescence spectrum analysis diagram of the fluorescent fluorinated grease in Example 1;

[0042] Figure 2 The infrared spectrum analysis diagram of the fluorescent ZnO quantum dots before and after modification in Example 1, before modification is represented as ZnOQDs, and after modification is represented as ZnO@F;

[0043] Figure 3 The figures are the states of fluorinated greases ①-④ in Example 1 and Comparative Examples 1-3 under white light and ultraviolet light. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with the examples and accompanying drawings. It should be understood that these examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The operating methods of the following examples that do not specify specific conditions are usually performed under normal conditions or under conditions recommended by the manufacturer. The content that is not described in detail in this specification sheet belongs to the prior art known to professionals in the field. The experimental materials used in the following examples, if not otherwise specified, can be purchased by conventional biochemical reagent companies.

[0045] Description of raw materials: Zinc acetate dihydrate, potassium hydroxide, anhydrous ethanol, n-hexane, heptadecafluorodecyltriethoxysilane, tridecafluorooctyltrimethoxysilane, nine-carbon perfluoropolyether siloxane, perfluorobutyl methyl ether, hexafluoropropylene trimer, etc. are all of AR grade purity. Perfluoropolyether oil, fluorosilicone oil and polytetrafluoroethylene powder are all commercially available.

[0046] In the embodiment, the fluorescent ZnO quantum dot sol used is prepared by the following method:

[0047] Take 150g of zinc acetate dihydrate in a reactor containing 4L of anhydrous ethanol, stir and reflux continuously at 80°C until completely dissolved, cool in a water bath to obtain a ZnO precursor solution, slowly pour 600mL of potassium hydroxide ethanol solution (1.5mol / L) into the above ZnO precursor solution while stirring, the mixed solution quickly precipitates a white precipitate and then gradually becomes clear to form ZnO quantum dots. Fluorescent ZnO quantum dots (particle size of 2 to 50nm) are precipitated with n-hexane, washed several times with ethanol, and dispersed in ethanol to form a fluorescent ZnO quantum dot sol (the mass fraction of ZnO quantum dots is 20wt%).

[0048] Example 1

[0049] Add 500g of perfluorobutyl methyl ether, 500g of fluorescent ZnO quantum dot sol, 35g of heptadecafluorodecyl triethoxysilane and 1g of water to the reactor, heat to 50°C, and stir to carry out fluorination modification reaction for 6h; after the reaction, add 3.25kg of perfluoropolyether oil (20°C kinematic viscosity is 822mm 2 / s), stir and mix thoroughly to obtain a mixed solution, heat to 60°C, remove and recover perfluorobutyl methyl ether, ethanol and water in the mixed solution by reduced pressure distillation; then add 1.63 kg of polytetrafluoroethylene powder (PTFE, particle size is 5 μm) thereto, stir at 400 rpm at 60°C for 2 h, vacuum degas for 1 h, take out of the kettle, place the mixture on a three-roll mill and grind it repeatedly for 3 times to obtain fluorescent fluorinated grease.

[0050] In the fluorescent fluorine-containing grease of this embodiment, the weight percentage of the fluorine-containing base oil is 64.8wt%, the weight percentage of the thickener is 32.5wt%, and the remainder is modified ZnO quantum dots.

[0051] Example 2

[0052] Add 500g hexafluoropropylene trimer, 250g fluorescent ZnO quantum dot sol, 15g nine-carbon perfluoropolyether siloxane and 1g water into the reactor, heat to 70°C, stir and carry out fluorination modification reaction for 4h; after the reaction, add 2kg perfluoropolyether oil (20°C kinematic viscosity is 822mm 2 / s) and 1.25kg fluorosilicone oil (kinematic viscosity at 20°C is 500mm 2 / s), stir and mix thoroughly to obtain a mixed solution, heat to 80°C, remove and recover hexafluoropropylene trimer, ethanol and water in the mixed solution by reduced pressure distillation; then add 1.5 kg of polytetrafluoroethylene powder (PTFE, particle size is 3 μm) thereto, stir at 300 rpm at 80°C for 2 h, vacuum degas for 1 h, take out of the autoclave, and then place the mixture on a three-roll mill and grind it repeatedly for 3 times to obtain fluorescent fluorinated grease.

[0053] In the fluorescent fluorine-containing grease of this embodiment, the weight percentage of the fluorine-containing base oil is 67.5wt%, the weight percentage of the thickener is 31.2wt%, and the remainder is modified ZnO quantum dots.

[0054] Example 3

[0055] Add 500g of perfluorobutyl methyl ether, 500g of fluorescent ZnO quantum dot sol, 35g of heptadecafluorodecyl triethoxysilane and 1g of water to the reactor, heat to 50°C, and stir to carry out fluorination modification reaction for 6h; after the reaction, add 3.25kg of perfluoropolyether oil (20°C kinematic viscosity is 450mm 2 / s), stir and mix thoroughly to obtain a mixed solution, heat to 60°C, remove and recover perfluorobutyl methyl ether, ethanol and water in the mixed solution by reduced pressure distillation; then add 1.63 kg of polytetrafluoroethylene powder (PTFE, particle size is 8 μm) thereto, stir at 500 rpm at 60°C for 3 h, vacuum degas for 1 h, take out of the kettle, place the mixture on a three-roll mill and grind it repeatedly for 4 times to obtain fluorescent fluorine-containing grease.

[0056] In the fluorescent fluorine-containing grease of this embodiment, the weight percentage of the fluorine-containing base oil is 64.8wt%, the weight percentage of the thickener is 32.5wt%, and the remainder is modified ZnO quantum dots.

[0057] Example 4

[0058] Add 200g of perfluorobutyltetrahydrofuran, 250g of fluorescent ZnO quantum dot sol, 50g of tridecafluorooctyltrimethoxysilane and 2g of water to the reactor, heat to 70°C, stir and carry out fluorination modification reaction for 4h; after the reaction, add 3.4kg of perfluoropolyether oil (20°C kinematic viscosity is 822mm 2 / s), stirring and mixing thoroughly to obtain a mixed solution, heating to 80°C, removing and recovering perfluorobutyltetrahydrofuran, ethanol and water in the mixed solution by vacuum distillation; then adding 1.5 kg of polytetrafluoroethylene powder (PTFE, particle size of 5 μm) thereto, stirring at 400 rpm at 80°C for 2 h, vacuum degassing for 1 h, taking out of the autoclave, placing the mixture on a three-roll mill and repeatedly grinding it for 4 times to obtain fluorescent fluorine-containing grease.

[0059] In the fluorescent fluorine-containing grease of this embodiment, the weight percentage of the fluorine-containing base oil is 68wt%, the weight percentage of the thickener is 30wt%, and the remainder is modified ZnO quantum dots.

[0060] Comparative Example 1

[0061] Add 3.25 kg of perfluoropolyether oil (kinematic viscosity at 20 ° C is 822 mm 2 / s) and 1.63kg polytetrafluoroethylene powder (PTFE, particle size is 5μm), heat to 60℃, stir at 400rpm for 2h, vacuum degas for 1h, take out of the kettle, place the mixture on a three-roll mill and grind it repeatedly for 3 times to obtain fluorine-containing grease.

[0062] Comparative Example 2

[0063] Add 3.25 kg of perfluoropolyether oil (kinematic viscosity at 20 ° C is 822 mm 2 / s), 1.63kg polytetrafluoroethylene powder (PTFE, particle size is 5μm) and 100g of the above-mentioned fluorescent ZnO quantum dot powder, heat to 60°C, stir at 400rpm for 2h, vacuum degas for 1h, take out of the kettle, place the mixture on a three-roll mill and grind it repeatedly for 3 times to obtain fluorine-containing grease.

[0064] Comparative Example 3

[0065] Add 500g of fluorescent ZnO quantum dot sol, 50g of tridecafluorooctyl trimethoxysilane and 2g of water to the reactor, heat it to 70°C, and stir to carry out fluorination modification reaction for 6h; after the reaction, heat it to 80°C, remove and recover ethanol and water in the mixture by vacuum distillation; add 3.5kg of perfluoropolyether oil (20°C kinematic viscosity is 822mm 2 / s) and 1.5 kg of polytetrafluoroethylene powder (PTFE, particle size of 5 μm), stirred at 400 rpm at 80°C for 2 h, vacuum degassed for 1 h, taken out of the kettle, and the mixture was placed on a three-roll mill and repeatedly ground for 4 times to obtain fluorine-containing grease.

[0066] Sample analysis

[0067] The properties of the fluorinated greases obtained in Examples 1-4 and Comparative Examples 1-3 were analyzed and tested:

[0068] The fluorescence spectrum analysis diagram of the fluorescent fluorinated grease in the representative embodiment 1 is as follows: Figure 1 As shown, it shows that it has good fluorescence performance. The fluorescence wavelength of the fluorescent fluorinated grease of Example 1 is 529nm under 365nm excitation; Figure 3 As shown, ① is Comparative Example 1, ② is Comparative Example 2, ③ is Comparative Example 3, and ④ is Example 1, and their states under daylight (white) light and ultraviolet light, respectively, indicate that the fluorescent ZnO quantum dots in the fluorescent fluorinated grease prepared in Example 1 are evenly dispersed, have no granularity, and have excellent fluorescent properties.

[0069] In Example 1, the fluorescent ZnO quantum dots were surface-fluorinated using heptadecafluorodecyltriethoxysilane. The infrared spectrum of the chemically modified ZnO quantum dots (denoted as ZnO@F) showed a wave number of 1144 cm -1 、1200cm -1The characteristic peak of carbon fluoride appears at 870cm -1 The appearance of characteristic peaks of silanol groups confirms the success of surface fluorination modification, e.g. Figure 2 shown.

[0070] From the comparison of the performance test results of the embodiment and the comparative example (Table 1), it can be seen that the cone penetration, oil separation and friction coefficient of the fluorescent fluorinated grease prepared by the method of the present invention are significantly improved, and the grease has uniform fluorescence, indicating that the modified ZnO quantum dots synthesized by the present invention can simultaneously improve the consistency, colloidal stability, friction reduction performance and fluorescence characteristics of the grease.

[0071] The fluorescent ZnO quantum dots of comparative example 2 are not fluorinated, and the fluorescent ZnO quantum dots of comparative example 3 do not use a fluorinated dispersing aid as a dispersion medium, resulting in poor compatibility and dispersibility in the fluorinated grease system, leading to agglomeration of nano ZnO quantum dots. Therefore, the improvement effect on the consistency, colloid stability, friction reduction performance, and fluorescence characteristics of the grease is not as good as that of Examples 1-4.

[0072] Table 1 Statistical results of the physical and chemical properties of the fluorinated greases prepared in the examples and comparative examples

[0073]

[0074] The above results indicate that, by using the method in the embodiment of the present invention, the modified ZnO quantum dots can be evenly dispersed in the fluorinated grease as an additive, and can optimize the structural strength of the thickener and improve the colloid stability. The fluorinated grease obtained has good fluorescence properties, colloid stability and anti-friction performance.

[0075] The embodiments described above provide a detailed description of the technical solutions of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, supplements or similar substitutions made within the scope of the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fluorescent fluorine-containing grease, characterized in that: The following components are included by weight percentage: Fluorine-containing base oil 50-75wt%; Thickener 20-45wt%; Modified ZnO quantum dots 1-10wt%; The modified ZnO quantum dots are fluorescent ZnO quantum dots modified by a fluorinated silane coupling agent, and the fluorinated silane coupling agent includes heptadecafluorodecyltrimethoxysilane, heptadecafluorodecyltriethoxysilane, tridecafluorooctyltrimethoxysilane, tridecafluorooctyltriethoxysilane, dodecafluoroheptylpropyltrimethoxysilane, nonafluorohexyltrimethoxysilane, trifluoropropyldimethoxymethylsilane, hexafluoropolyether siloxane or nonafluoropolyether siloxane.

2. The fluorescent fluorine-containing grease according to claim 1, characterized in that: The fluorine-containing base oil is at least one of a perfluoropolyether base oil and a fluorosilicone base oil.

3. The fluorescent fluorine-containing grease according to claim 1, characterized in that: The thickener is PTFE micropowder, and the particle size of the PTFE micropowder is 0.1-200 μm.

4. The fluorescent fluorine-containing grease according to claim 1, characterized in that: The particle size of the fluorescent ZnO quantum dots is 2-50nm.

5. The fluorescent fluorine-containing grease according to claim 1, characterized in that: The fluorescent fluorine-containing grease comprises the following components by weight percentage: Fluorine-containing base oil 55-70wt%; Thickener 25-40wt%; Modified ZnO quantum dots 1-5wt%.

6. The method for preparing the fluorescent fluorine-containing grease according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) mixing a fluorescent ZnO quantum dot sol, a dispersing aid, a fluorinated silane coupling agent and water, and heating the mixture to react to obtain a mixed solution containing modified ZnO quantum dots; (2) adding a fluorine-containing base oil to the mixed solution containing the modified ZnO quantum dots, mixing the mixture thoroughly, and removing the dispersing aid, sol solvent, and water therein; (3) Add a thickener to the mixed solution obtained in step (2), stir, degas, and grind to obtain the fluorescent fluorinated grease.

7. The method for preparing the fluorescent fluorine-containing grease according to claim 6, characterized in that: The dispersing aid is a fluorine-containing solvent, including at least one of perfluorooctane, perfluoroheptane, hexafluoropropylene dimer, hexafluoropropylene trimer, hexafluoroisopropanol, perfluorobutyl methyl ether, 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether, perfluorobutyltetrahydrofuran, and hexafluorobenzene.

8. The method for preparing the fluorescent fluorine-containing grease according to claim 6, characterized in that: In step (1), the temperature is raised to 40-80° C. and the reaction is carried out for 2-10 hours.

9. The method for preparing the fluorescent fluorine-containing grease according to claim 6, characterized in that: The dispersion aid, sol solvent and water are removed by vacuum distillation.

10. The method for preparing fluorescent fluorine-containing grease according to claim 6, characterized in that: In step (3), mechanical stirring is used for stirring, the stirring temperature is 60-120° C., the stirring speed is 100-2000 rpm, and the stirring time is 1-4 h; and / or vacuum degassing is used for degassing; and / or grinding is performed using a three-roll mill.

Images