CN110923050A - High-temperature-resistant high-dispersity edge graphene oxide nano-microchip lubricating grease - Google Patents
High-temperature-resistant high-dispersity edge graphene oxide nano-microchip lubricating grease Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/06—Mixtures of thickeners and additives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/085—Phosphorus oxides, acids or salts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/22—Acids obtained from polymerised unsaturated acids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/045—Polyureas; Polyurethanes
- C10M2217/0456—Polyureas; Polyurethanes used as thickening agents
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/046—Overbasedsulfonic acid salts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/06—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having phosphorus-to-carbon bonds
Abstract
The invention provides high-temperature-resistant high-dispersity edge graphene oxide nano-microchip lubricating grease which comprises, by mass, 70-80 parts of lithium-based grease, 10-20 parts of α -zirconium phosphate, 3-5 parts of polyurea thickening agent, 2 parts of edge graphene oxide nano-microchip, 0.3-0.5 part of metal cleaning agent, 2-3 parts of antirust agent and 0.2-0.5 part of ionic liquid, and is high in high-temperature resistance and friction reduction and abrasion resistance, and the problem of poor dispersity of graphene in the lubricating grease is solved.
Description
Technical Field
The invention relates to the field of lubricating grease, and in particular relates to high-temperature-resistant high-dispersity edge graphene oxide nano-microchip lubricating grease.
Background
The lubricating grease mainly has four functions of antifriction, protection, shock absorption and sealing, and in order to improve the antifriction effect of the lubricating grease, various organic compounds containing elements such as sulfur, phosphorus, lead and the like are usually added into the lubricating grease, so that the problems of toxicity and environmental pollution are more and more limited.
Graphene is more and more concerned about preparing lubricating oil by taking graphene as an additive due to excellent lubricating performance of graphene, but graphene has strong surface inertia, so that the dispersion stability of graphene is poor, and in addition, strong van der waals force exists between graphene sheets, so that graphene is easy to agglomerate on one hand, and on the other hand, a compact film is easy to form under the extrusion action of a friction interface, and the porous structure of an interface protective film cannot be maintained.
Disclosure of Invention
In order to solve the problems, the invention provides the edge oxidized graphene nano-microchip lubricating grease with high temperature resistance and high dispersibility, solves the problem of poor dispersibility of graphene in the lubricating grease, and has strong high temperature resistance, friction reduction and wear resistance.
The technical scheme for solving the problems is to provide the high-temperature-resistant high-dispersity edge graphene oxide nano-microchip lubricating grease which comprises the following components in parts by mass: 70-80 parts of lithium-based grease, 3-5 parts of polyurea thickening agent, 2 parts of edge oxidized graphene nano-micro sheet, 0.3-0.5 part of metal cleaning agent, 2-3 parts of antirust agent and 0.2-0.5 part of ionic liquid.
Preferably, the preparation method of the edge graphene oxide nanoplatelets comprises the following steps: K1. adding concentrated sulfuric acid into graphite, and precooling the graphite to below 0 ℃ by using ice salt; K2. adding a potassium permanganate mixed solution, reacting at 35 ℃, cooling, adding deionized water for dilution, and stirring; K3. adding 30 parts of hydrogen peroxide, stirring for reaction, washing with water, and then washing with acid; K4. and (5) drying in vacuum to obtain the edge graphene oxide nanoplatelets.
Preferably, the rust inhibitor is dimer acid and phosphate ester.
Preferably, the metal cleaner is calcium alkylbenzene sulfonate with the base value of 300-500mg KOH/g.
Preferably, the hydrophobic ionic liquid comprises one or more of quaternary phosphonium salt type ionic liquid, quaternary ammonium salt type ionic liquid, [ Cxm ] Br, [ Cxm ] DEHP, wherein X is more than 8.
The polyurea thickening agent is generated by the reaction of isocyanate and organic amine, can completely react in a short time without catalysis, and comprises the specific steps of dissolving the organic amine in a proper solvent, raising the temperature to a certain temperature in a reaction kettle, dropwise adding isocyanate (MDI) into the reaction kettle under the condition of uniform stirring, reacting for a certain time, adding a large amount of distilled water (unstable carbamic acid is generated by the reaction of the isocyanate and the water) to remove excessive isocyanate, filtering and drying to obtain the solid polyurea thickening agent, wherein strong hydrogen bonds and carbamido groups in the prepared polyurea thickening agent molecule ensure the stability of the whole colloid system, so that the lubricating grease keeps stable semisolid altai, the lone electron pair of nitrogen atoms greatly enhances the polarity of the molecule and the affinity of the polyurea thickening agent to metal, and meanwhile, the polyurea thickening agent has certain antirust capacity and wear resistance due to the existence of the nitrogen atoms, and because the lubricating grease does not contain metal ions, the lithium-based grease is prevented from generating oxidation catalysis, so that the lubricating grease has strong comprehensive performance.
The edge graphene oxide nano-microchip additive endows the lubricating grease with a good heat conduction function, the ionic liquid as the additive endows the lubricating grease with good electric conductivity, and the increase of the alkyl chain length of the hydrophobic ionic liquid is beneficial to the dispersion in an organic solvent of the edge graphene oxide nano-microchip, and the dimer acid and the phosphate ester as the additives have an antirust function, and the smaller the alkyl groups of the dimer acid and the phosphate ester are, so that the lubricating grease added with the polyurea thickening agent has better extreme pressure property and strong wear resistance.
The commonly used solid lubricant is molybdenum disulfide and graphite, but the two materials have some application limitations, such as molybdenum element belongs to rare metal, the cost is high, and the graphite has the characteristics of high-temperature oxidation failure, certain moisture must exist in the use environment of the graphite, the layered α -zirconium phosphate has a layered structure similar to that of molybdenum disulfide, the layers are stacked together in an ABAB mode, water molecules in the layers form hydrogen bonds with protonated P-OH groups on one layer, the layers are easy to slide due to weak van der Waals force, and a wear surface lubricated by α -zirconium phosphate forms a wear surface containing Fe2O3、Zr02、Zr(PO4)2The lubricating film can be spread into a solid protective film along the metal surface at the furrow position of the wear surface of the friction pair, thereby improving the tribological performance of lubricating oil and protecting the lubricating oilThe high-efficiency, high-reliability, heat-resistant and long-life operation of mechanical equipment is proved.
In the scheme, the reaction process of the marginalized graphene oxide nanosheets is as follows: adding graphite into concentrated sulfuric acid cooled to 0 ℃, wherein the oxidability of sulfuric acid is not high at low temperature, the intercalation reaction of the graphite is difficult, after potassium permanganate is added, the oxidation capacity of the system is improved to a certain extent, the edge of a graphite layer is firstly oxidized, part of carbon atoms lose electrons to become positive ions, hydrogen sulfate ions and sulfuric acid molecules with polarity are adsorbed at the edge of a graphite sheet layer through electrostatic force, sulfate ions and sulfuric acid molecules adsorbed at the edge of the graphite sheet layer through the electrostatic force and graphite carbon positive ions form a sulfuric acid-graphite edge compound, and the oxidation capacity of the system is controlled within a certain range by controlling the use amount of the concentrated sulfuric acid and the potassium permanganate, so that almost no or few sulfuric acid molecules can enter the interlayer of the graphite, and the interior of the graphite is oxidized and inserted; after the potassium permanganate is added, heating the system to 35 ℃ and stirring for 2.5h, wherein the aim at this stage is to further perform deep oxidation reaction on the sulfuric acid-graphite edge compound which is not fully oxidized by utilizing the strong oxidation effect of the potassium permanganate, and C = O double bonds or C-O-C epoxy bonds are formed at the edge of the oxidized graphene; due to the electrostatic adsorption effect between the oxygen-containing groups and the reaction liquid, a dark green viscous mixed liquid is formed in the reaction system, and the color of the system changes, so that the occurrence of oxidation reaction is proved; the system is sticky, which indicates that part of the sulfuric acid still does not participate in the reaction; hydrogen peroxide is added, bubbles are generated, the potassium permanganate is not completely reacted, the concentration of the potassium permanganate is obviously reduced along with the reaction, the oxidation capacity of the system is greatly weakened, and the reaction with graphite is forced to stop or is extremely slow; adding water into the mixed solution for dilution, then violently stirring, entering a high-temperature reaction stage, enabling the temperature of the mixed solution to rapidly rise under the action of residual concentrated sulfuric acid in the mixed solution and the water, rapidly hydrolyzing an insufficiently oxidized sulfuric acid-graphite edge compound, and enabling OH & lt- & gt in water to have an ion exchange effect with hydrogen sulfate ions so as to displace part of hydrogen sulfate ions and combine with carbon atoms at the edge of graphite, meanwhile, some water molecules enter the graphite layers to form interlayer water, the graphite layer spacing is increased, and the volume expansion phenomenon is generated; after the sulfuric acid-graphite edge compound with insufficient volume expansion oxidation is subjected to ultrasonic treatment, graphite can be fractured to form the edged graphene oxide nanosheets.
According to the scheme, partial edge oxidized graphene is obtained by controlling the using amount of an oxidant and the oxidation time, the prepared graphene is low in oxidation degree, a single-layer carbon atom structure is almost completely maintained, other derivatization is easily carried out after the edge oxygen-containing group is functionalized, the edge oxidized graphene is provided with more folds at the edge, the inside of a laminated structure is smooth and is just matched with the laminated structure which is high in conjugation degree and smooth and flat of the single-layer graphene, the edge folds are formed after the edge of the laminated structure is oxidized, oxygen-containing functional groups such as hydroxyl, carboxyl or epoxy are difficult to introduce due to low oxidation degree and almost no positive carbon ions are generated in the laminated structure, so that carbon atoms are still kept in a flat state in an sp2 hybridization mode, a smooth surface is presented, the edge folds can be effectively adsorbed on the surface of a friction pair, and the friction coefficient of the surface of the friction pair is reduced by the smooth surface, the wear resistance of the surface of the material is improved, the extreme pressure wear resistance is realized, and the edge oxidation structure of the material leads the dispersibility of the material to be good.
The invention has the following beneficial effects:
1. the strong hydrogen bonds and carbamido groups in the prepared polyurea thickening agent molecule ensure the stability of the whole colloid system, are beneficial to the dispersion stability of the edge oxidized graphene nanometer microchip, the lone electron pair of nitrogen atoms greatly enhances the polarity of the molecule and the affinity of the polyurea thickening agent to metal, and meanwhile, the polyurea thickening agent has certain antirust capacity and wear resistance due to the existence of the nitrogen atoms, and because the polyurea thickening agent does not contain metal ions, the oxidation catalysis of lithium-based grease is avoided, the thickening capacity is strong, the dropping point is high, so that the prepared lubricating grease has strong high temperature resistance, high stability and strong extreme pressure wear resistance;
2.α zirconium phosphate lubricated wear surfaces formed to contain Fe2O3、Zr02、Zr(PO4)2Can spread into solid along the metal surface at the furrow of the wear surface of the friction pairA protective film, thereby improving the tribological properties of the lubricating oil, and simultaneously MoS at higher temperatures2Is easily oxidized into MoS3The fluctuation of the lubricating performance is caused, but the α -zirconium phosphate has stable property, the friction coefficient cannot be changed due to the temperature, and the prepared lubricating grease has high heat resistance;
3. the edge graphene oxide has more folds at the edge, the inside of the layered structure is smooth, the α -zirconium phosphate layered structure enters gaps formed among the edge graphene oxide, so that the lubricating grease is kept in a uniform semi-solid state, the edge wrinkles can be effectively adsorbed on the surface of the friction pair, the friction coefficient of the surface of the friction pair is reduced by the smooth surface, the wear resistance of the surface of the material is improved, the extreme pressure wear resistance effect is achieved, and the edge oxidized structure leads to good dispersibility.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Example 1
Preparing edge graphene oxide nanoplatelets: adding 25 mL of concentrated sulfuric acid into a 250 mL flask containing 1g of graphite (the graphite does not need to be pre-oxidized), cooling to below 0 ℃ in a cold salt bath, uniformly stirring, slowly adding 3g of potassium permanganate, stirring the mixed solution at 35 ℃ for 2.5 hours until the solution is pasty, cooling the reaction system to below 0 ℃ again, adding 180 mL of deionized water for dilution, stirring vigorously at the same time, adding 30% of hydrogen peroxide into the mixed solution until no bubbles are generated, continuing stirring for 10 minutes, performing suction filtration, washing a filter cake with a large amount of deionized water, and washing with dilute hydrochloric acid until BaCl is generated2And (3) detecting that no precipitate is formed in the filtrate, finally washing with deionized water to remove redundant hydrochloric acid, carrying out ultrasonic treatment on the finally obtained suspension for 30 min, centrifuging for 3min at 14000 r/min to obtain black powder, and carrying out vacuum drying for 24 h at 60 ℃ to obtain the edge graphene oxide nanoplatelets.
High-temperature-resistant high-dispersity edge graphene oxide nano-microchip lubricating grease: weighing 70g of lithium-based grease, 2g of edge oxidized graphene nanoplatelets, 0.3g of 300-500mg KOH/g calcium alkyl benzene sulfonate, 2g of dimer acid and phosphate、0.2g[C10mim]Adding Br into high-shear equipment, uniformly dispersing by using ultrasound to assist, adding 10g of α -zirconium phosphate and 3g of polyurea thickening agent into the product, stirring, distilling, cooling, recovering, and grinding the product on a three-roller machine for three times to obtain the high-temperature-resistant high-dispersity edge oxidized graphene nano-microchip lubricating grease.
Example 2
Preparing edge graphene oxide nanoplatelets: adding 25 mL of concentrated sulfuric acid into a 250 mL flask containing 1g of graphite (the graphite does not need to be pre-oxidized), cooling to below 0 ℃ in an ice salt bath, uniformly stirring, slowly adding 3g of potassium permanganate, stirring the mixed solution at 35 ℃ for 2.5 hours until the solution is pasty, cooling the reaction system to below 0 ℃ again, adding 180 mL of deionized water for dilution, stirring vigorously, adding 30% hydrogen peroxide into the mixed solution until no bubble is generated, stirring for 10 min, filtering, washing the filter cake with a large amount of deionized water, washing with dilute hydrochloric acid until no precipitate is detected in the filtrate by BaCl2, washing with deionized water to remove excessive hydrochloric acid, subjecting the suspension to ultrasonic treatment for 30 min, centrifuging at 14000 r/min for 3min to obtain black powder, and vacuum drying at 60 deg.C for 24 h to obtain edge oxidized graphene nanoplatelets.
Weighing 80g of lithium-based grease, 2g of edge graphene oxide nanoplatelets, 0.5g of calcium alkylbenzene sulfonate with the base value of between 300 and 500mg KOH/g, 2g of dimer acid and phosphate ester and 0.2g of quaternary ammonium salt type ionic liquid, adding the mixture into high shear equipment, uniformly dispersing by using ultrasonic assistance, adding 20g of α -zirconium phosphate and 5g of polyurea thickening agent into the product, stirring, distilling, cooling, recovering, and grinding the product on a three-roll machine for three times to obtain the edge graphene oxide nanoplatelets lubricating grease with high temperature resistance and high dispersibility.
Example 3
Preparing edge graphene oxide nanoplatelets: adding 25 mL of concentrated sulfuric acid into a 250 mL flask containing 1g of graphite (the graphite does not need to be pre-oxidized), cooling to below 0 ℃ in an ice salt bath, uniformly stirring, slowly adding 3g of potassium permanganate, stirring the mixed solution at 35 ℃ for 2.5 hours until the solution is pasty, cooling the reaction system to below 0 ℃ again, adding 180 mL of deionized water for dilution, stirring vigorously, adding 30% hydrogen peroxide into the mixed solution until no bubble is generated, stirring for 10 min, filtering, washing the filter cake with a large amount of deionized water, washing with dilute hydrochloric acid until no precipitate is detected in the filtrate by BaCl2, washing with deionized water to remove excessive hydrochloric acid, subjecting the suspension to ultrasonic treatment for 30 min, centrifuging at 14000 r/min for 3min to obtain black powder, and vacuum drying at 60 deg.C for 24 h to obtain edge oxidized graphene nanoplatelets.
Weighing 75g of lithium-based grease, 2g of edge graphene oxide nanoplatelets, 0.4g of calcium alkylbenzene sulfonate with the base value of between 300 and 500mg KOH/g, 2.5g of dimer acid and phosphate ester and 0.4g of quaternary phosphonium salt type ionic liquid, adding the mixture into high shear equipment, uniformly dispersing by using ultrasonic assistance, adding 15g of α -zirconium phosphate and 4g of polyurea thickening agent into the product, stirring, distilling, cooling, recovering, and grinding the product on a three-roll machine for three times to obtain the high-temperature-resistant and high-dispersibility edge graphene oxide nanoplatelets lubricating grease.
The above mentioned matters are not related, and all the matters are applicable to the prior art.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (5)
1. The high-temperature-resistant high-dispersity edge graphene oxide nano-microchip lubricating grease is characterized by comprising, by mass, 70-80 parts of lithium-based grease, 10-20 parts of α -zirconium phosphate, 3-5 parts of polyurea thickening agent, 2 parts of edge graphene oxide nano-microchip, 0.3-0.5 part of metal cleaning agent, 2-3 parts of antirust agent and 0.2-0.5 part of ionic liquid.
2. The high temperature resistant high dispersibility edge graphene oxide nanoplatelets grease as claimed in claim 1, wherein the preparation step of the edge graphene oxide nanoplatelets comprises: K1. adding concentrated sulfuric acid into graphite, and precooling the graphite to below 0 ℃ by using ice salt; K2. adding a potassium permanganate mixed solution, reacting at 35 ℃, cooling, adding deionized water for dilution, and stirring; K3. adding 30 parts of hydrogen peroxide, stirring for reaction, washing with water, and then washing with acid; K4. and (5) drying in vacuum to obtain the edge graphene oxide nanoplatelets.
3. The high temperature resistant high dispersibility edge oxidized graphene nanoplatelet grease as claimed in claim 1, wherein the rust inhibitor is dimer acid and phosphate ester.
4. The high temperature resistant highly dispersed edge oxidized graphene nanoplatelet grease as claimed in claim 1, wherein the metal detergent is calcium alkyl benzene sulfonate with a base number of 300-500mg KOH/g.
5. The high-temperature-resistant high-dispersity edge graphene oxide nanoplatelets lubricating grease as claimed in claim 1, wherein the hydrophobic ionic liquid comprises one or more of quaternary phosphonium salt type ionic liquid, quaternary ammonium salt type ionic liquid, [ Cxmim ] Br, and [ Cxmim ] DEHP, wherein X > 8.
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Application publication date: 20200327 |