CN110846111A - High-temperature-resistant high-dispersity graphene nano microchip engine oil and preparation method thereof - Google Patents
High-temperature-resistant high-dispersity graphene nano microchip engine oil and preparation method thereof Download PDFInfo
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- 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
- C10M169/04—Mixtures of base-materials and additives
- C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
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- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
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- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
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- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
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- C10M2207/28—Esters
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
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- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
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- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
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- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
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- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/109—Polyethers, i.e. containing di- or higher polyoxyalkylene groups esterified
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- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
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Abstract
The invention discloses high-temperature-resistant high-dispersity graphene nano microchip engine oil and a preparation method thereof, wherein the high-temperature-resistant high-dispersity graphene nano microchip engine oil comprises the following components in percentage by weight: 0.1-1.0% of an antiwear agent, 0.05-0.1% of a defoaming agent, 0.5-1.5% of an antioxidant, 0.5-1.5% of a metal cleaning agent, 0.5-1.5% of a metal corrosion inhibitor, 1-3% of a surfactant and the balance of base oil; the antiwear agent is a carbon nitride nanotube modified graphene composite material. The high-temperature-resistant high-dispersity graphene nanoplatelet engine oil disclosed by the invention is good in stability, can be used in a high-temperature working environment, and effectively improves the running performance of an engine.
Description
Technical Field
The invention relates to the technical field of lubricating oil,
in particular to high-temperature-resistant high-dispersity graphene nano microchip engine oil and a preparation method thereof.
Background
The engine oil is also called engine lubricating oil or internal combustion engine lubricating oil, is a lubricating medium of each moving part in an engine system, and has the functions of lubrication, cooling, cleaning, sealing and the like. The performance of the engine oil directly affects the working efficiency, oil consumption, output power, service life, pollutant emission and other indexes of the engine.
Graphene is a novel engine oil antiwear agent researched in recent years, is a two-dimensional crystal stripped from a graphite material and composed of carbon atoms, and is the thinnest and highest-strength material in the natural world at present. Graphene is used as an engine oil antiwear agent, the graphene nano material can play a role of a pressure-bearing framework in lubricating oil by utilizing the specific physical and chemical properties of the graphene nano material, and the graphene can partially permeate into the surface of a friction metal to change the surface structure of the metal, so that the hardness of the metal is changed, and the antiwear performance of the metal is further improved; and the graphene which does not permeate into the metal surface is filled in the concave-convex part of the friction surface, so that the bearing area of the friction surface is increased, the friction coefficient can be reduced, and the bearing capacity of the metal surface is improved. However, when graphene is directly added to engine oil, graphene is easily layered and precipitated in liquid engine oil due to van der waals force between graphene sheets, and thus it is difficult to uniformly disperse graphene in engine oil.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the high-temperature-resistant high-dispersity graphene nanoplatelet engine oil and the preparation method thereof.
In order to solve the problems, the invention adopts the following technical scheme:
the high-temperature-resistant high-dispersity graphene nano microchip engine oil comprises the following components in percentage by weight:
0.1-1.0% of an antiwear agent, 0.05-0.1% of a defoaming agent, 0.5-1.5% of an antioxidant, 0.5-1.5% of a metal cleaning agent, 0.5-1.5% of a metal corrosion inhibitor, 1-3% of a surfactant and the balance of base oil;
the antiwear agent is a carbon nitride nanotube modified graphene composite material.
Preferably, the antiwear agent is prepared by the following method:
dissolving graphene oxide in toluene, and performing ultrasonic dispersion to form a graphene oxide dispersion liquid;
dissolving sodium azide and cyanuric chloride in toluene to form a reaction solution;
adding the reaction solution into the graphene oxide dispersion solution, and performing secondary ultrasonic dispersion to form a mixed solution;
adding the mixed solution into a reaction kettle to perform a solvothermal reaction to prepare a carbon nitride modified graphene composite material;
centrifuging and washing to obtain the antiwear agent.
Preferably, the concentration of the graphene oxide dispersion liquid is 0.10-0.16 mg/mL.
Preferably, the concentration of the sodium azide in the reaction liquid is 40-50 mg/mL, and the concentration of the cyanuric chloride is 40-45 mg/mL.
Preferably, the reaction conditions of the solvothermal reaction are: the reaction temperature is 200-230 ℃, and the reaction time is 12-18 h.
Preferably, the defoamer is an acrylate type non-silicon defoamer; and/or
The antioxidant is at least one of organic sulfur salt, organic phosphorus salt and diphenylamine; and/or
The metal cleaning agent is high-alkali-value calcium alkyl benzene sulfonate; and/or
The metal corrosion inhibitor is zinc dialkyl dithiophosphate; and/or
The surfactant is at least one of oleic acid, tween-80 and polyethylene glycol.
Preferably, the base oil is an internal combustion engine oil or a gear oil.
The invention also provides a preparation method of the high-temperature-resistant high-dispersity graphene nano microchip engine oil, which comprises the following steps:
adding an antiwear agent into a surfactant, and uniformly dispersing by ultrasonic to obtain a first mixed solution;
adding a defoaming agent, an antioxidant, a metal cleaning agent and a metal corrosion inhibitor into base oil, and uniformly dispersing by ultrasonic to obtain a second mixed solution;
and adding the first mixed solution into the second mixed solution, and uniformly performing ultrasonic dispersion to obtain the high-temperature-resistant high-dispersity graphene nanoplatelets engine oil.
Compared with the prior art, the invention has the technical effects that:
the anti-wear agent added into the high-temperature-resistant high-dispersity graphene nanoplatelet engine oil is graphene oxide modified by the carbon nitride nanotubes, so that on one hand, the carbon nitride nanotubes can be cooperated with graphene to play a role in wear resistance, and the wear resistance of a graphene material is enhanced; on the other hand, the carbon nitride in the shape of a nano tube plays a role in supporting layers between graphene layers, prevents the graphene layers and the layers from stacking and agglomerating to cause precipitation, and improves the dispersibility of the graphene material serving as an antiwear agent in engine oil. The high-temperature-resistant high-dispersity graphene nanoplatelet engine oil disclosed by the invention is good in stability, can be used in a high-temperature working environment, and effectively improves the running performance of an engine.
The preparation method of the high-temperature-resistant high-dispersity graphene nano microchip engine oil is simple, the process conditions are easy to control, and the stability of the performance of the engine oil is favorably maintained.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides high-temperature-resistant high-dispersity graphene nano microchip engine oil which comprises the following components in percentage by weight:
0.1-1.0% of an antiwear agent, 0.05-0.1% of a defoaming agent, 0.5-1.5% of an antioxidant, 0.5-1.5% of a metal cleaning agent, 0.5-1.5% of a metal corrosion inhibitor, 1-3% of a surfactant and the balance of base oil;
the antiwear agent is a carbon nitride nanotube modified graphene composite material.
The defoaming agent of the high-temperature-resistant high-dispersity graphene nano microchip engine oil is an acrylate non-silicon defoaming agent; the antioxidant is at least one of organic sulfur salt, organic phosphorus salt and diphenylamine; the metal cleaning agent is high-alkali-value calcium alkyl benzene sulfonate; the metal corrosion inhibitor is zinc dialkyl dithiophosphate; the surfactant is at least one of oleic acid, tween-80 and polyethylene glycol. The base oil is engine oil or gear oil of an internal combustion engine.
The antiwear agent is prepared by the following method:
(1) dissolving graphene oxide in toluene, and performing ultrasonic dispersion to form a graphene oxide dispersion liquid;
(2) dissolving sodium azide and cyanuric chloride in toluene to form a reaction solution;
(3) adding the reaction solution into the graphene oxide dispersion solution, and performing secondary ultrasonic dispersion to form a mixed solution;
(4) adding the mixed solution into a reaction kettle to perform a solvothermal reaction to prepare a carbon nitride modified graphene composite material;
(5) centrifuging and washing to obtain the graphene engine oil antiwear agent.
The multilayer graphene oxide in the step (1) is prepared by a hummers method, and the number of layers is 10-50. The friction coefficient of the 10-50 layers of graphene is smaller than that of single-layer graphene, and the cost is lower than that of a single layer; the graphene with more than 50 layers is easy to stack and agglomerate between layers, and the stability is poor. The graphene oxide has better solubility in toluene, the graphene oxide can be promoted to be dissolved in the toluene and generate interlayer peeling through ultrasonic dispersion, and the ultrasonic dispersion conditions are as follows: the ultrasonic power is 150-200 w, and the ultrasonic time is 30-60 min. Preferably, the concentration of the prepared graphene oxide dispersion liquid is 0.10-0.16 mg/mL.
The amount of the sodium azide and the cyanuric chloride in the step (2) is correspondingly adjusted according to the amount of the graphene oxide in the step (1), and preferably, the concentration of the sodium azide in the reaction solution is 40-50 mg/mL, and the concentration of the cyanuric chloride is 40-45 mg/mL.
In the step (3), the time for the secondary ultrasonic dispersion is not suitable to be too long, and the ultrasonic time is too long, which may damage the lamellar structure of the graphene oxide and cause lamellar fragmentation, preferably, the conditions for the secondary ultrasonic dispersion are as follows: the ultrasonic power is 150-200 w, and the ultrasonic time is 5-10 min.
Controlling the temperature and time of the solvothermal reaction in the step (4) is a key step for preparing the carbon nitride modified graphene composite material, and preferably, the reaction conditions of the solvothermal reaction are as follows: the reaction temperature is 200-230 ℃, and the reaction time is 12-18 h. After preorder ultrasonic treatment, graphene oxide lamella layers are well stripped, the interlayer spacing is increased, sodium azide and cyanuric chloride molecules are diffused among the graphene oxide lamella layers in a toluene solvent, in-situ polymerization reaction is carried out among the graphene oxide lamella layers to generate nanotube-shaped carbon nitride, and the diameter of the carbon nitride nanotube is 40-80 nm and the wall thickness is 20-40 nm determined by an SEM (scanning electron microscope). The carbon nitride has the characteristics of ultrahigh hardness and high temperature resistance, the graphene composite material modified by the nanotube-shaped carbon nitride has better high temperature resistance and wear resistance, and in addition, the nanotube-shaped carbon nitride plays a role in supporting between layers of graphene layers, so that the precipitation phenomenon caused by stacking and agglomerating between the graphene layers and the layers can be prevented, and the dispersibility of the graphene material as an anti-wear agent is improved.
In the step (5), the prepared carbon nitride modified graphene composite material can be washed by using solvents such as methanol, acetonitrile, ether and the like, and finally, the graphene engine oil antiwear agent is prepared by washing with pure water and freeze drying.
The invention also provides a preparation method of the high-temperature-resistant high-dispersity graphene nano microchip engine oil, which comprises the following steps:
(10) adding an antiwear agent into a surfactant, and uniformly dispersing by ultrasonic to obtain a first mixed solution;
(20) adding a defoaming agent, an antioxidant, a metal cleaning agent and a metal corrosion inhibitor into base oil, and uniformly dispersing by ultrasonic to obtain a second mixed solution;
(30) and adding the first mixed solution into the second mixed solution, and uniformly dispersing by using ultrasonic waves to obtain the high-temperature-resistant high-dispersity graphene nanoplatelets engine oil.
The following is a further description with reference to specific examples.
Example 1
The embodiment 1 of the invention provides high-temperature-resistant high-dispersity graphene nano microchip engine oil and a preparation method thereof, wherein the graphene nano microchip engine oil comprises the following components in percentage by weight:
0.5 percent of antiwear agent, 0.05 percent of acrylate type non-silicon defoamer, 0.5 percent of diphenylamine, 0.5 percent of calcium alkyl benzene sulfonate, 0.5 percent of zinc dialkyl dithiophosphate, 1 percent of oleic acid and the balance of internal combustion engine oil.
The antiwear agent is prepared by the following method:
(1) dissolving graphene oxide in 30mL of toluene, performing ultrasonic treatment for 40min at 180w, and performing ultrasonic dispersion to obtain a graphene oxide dispersion liquid with the concentration of 0.16 mg/mL;
(2) dissolving sodium azide and cyanuric chloride in 30mL of toluene to form a reaction solution, wherein the concentration of the sodium azide in the reaction solution is 45mg/mL, and the concentration of the cyanuric chloride in the reaction solution is 40 mg/mL;
(3) adding the reaction solution into the graphene oxide dispersion solution, performing ultrasonic treatment for 5min at 180w, and performing ultrasonic dispersion to form a mixed solution;
(4) adding the mixed solution into a 150ml reaction kettle to carry out solvothermal reaction at the reaction temperature of 200 ℃ for 15h, and preparing the carbon nitride modified graphene composite material;
(5) centrifuging, washing for 3 times by adopting acetonitrile, finally washing for 2 times by adopting pure water, and freeze-drying to obtain the graphene engine oil antiwear agent.
The high-temperature-resistant high-dispersity graphene nano microchip engine oil is prepared by the following method:
(10) adding the antiwear agent into surfactant oleic acid in proportion, performing ultrasonic treatment for 5min at 150w, and uniformly dispersing to obtain a first mixed solution;
(20) adding the acrylate type non-silicon defoaming agent, diphenylamine, calcium alkylbenzene sulfonate and zinc dialkyl dithiophosphate into internal combustion engine oil according to the above proportion, performing ultrasonic treatment for 5min at 150w, and uniformly dispersing to obtain a second mixed solution;
(30) and adding the first mixed solution into the second mixed solution, performing 150w ultrasonic treatment for 5min, and uniformly dispersing to obtain the high-temperature-resistant high-dispersity graphene nanoplatelets engine oil.
Example 2
The embodiment 2 of the invention provides high-temperature-resistant high-dispersity graphene nano microchip engine oil and a preparation method thereof, wherein the graphene nano microchip engine oil comprises the following components in percentage by weight:
1% of antiwear agent, 0.1% of acrylate type non-silicon defoaming agent, 1.0% of diphenylamine, 0.5% of calcium alkyl benzene sulfonate, 1.0% of zinc dialkyl dithiophosphate, 3% of oleic acid and the balance of internal combustion engine oil.
The antiwear agent is prepared by the following method:
(1) dissolving graphene oxide in 30mL of toluene, performing ultrasonic treatment for 60min at 180w, and performing ultrasonic dispersion to obtain a graphene oxide dispersion liquid with the concentration of 0.12 mg/mL;
(2) dissolving sodium azide and cyanuric chloride in 30mL of toluene to form a reaction solution, wherein the concentration of the sodium azide in the reaction solution is 50 mg/mL, and the concentration of the cyanuric chloride in the reaction solution is 45 mg/mL;
(3) adding the reaction solution into the graphene oxide dispersion solution, performing ultrasonic treatment for 8min at 180w, and performing ultrasonic dispersion to form a mixed solution;
(4) adding the mixed solution into a 150ml reaction kettle to carry out solvothermal reaction at 220 ℃ for 12h to prepare the carbon nitride modified graphene composite material;
(5) centrifuging, washing with diethyl ether for 3 times, finally washing with pure water for 2 times, and freeze-drying to obtain the graphene engine oil antiwear agent.
The high-temperature-resistant high-dispersity graphene nano microchip engine oil is prepared by the following method:
(10) adding the antiwear agent into surfactant oleic acid in proportion, performing ultrasonic treatment for 5min at 150w, and uniformly dispersing to obtain a first mixed solution;
(20) adding the acrylate type non-silicon defoaming agent, diphenylamine, calcium alkylbenzene sulfonate and zinc dialkyl dithiophosphate into internal combustion engine oil according to the above proportion, performing ultrasonic treatment for 5min at 150w, and uniformly dispersing to obtain a second mixed solution;
(30) and adding the first mixed solution into the second mixed solution, performing 150w ultrasonic treatment for 5min, and uniformly dispersing to obtain the high-temperature-resistant high-dispersity graphene nanoplatelets engine oil.
Example 3
The embodiment 3 of the invention provides high-temperature-resistant high-dispersity graphene nano microchip engine oil and a preparation method thereof, wherein the graphene nano microchip engine oil comprises the following components in percentage by weight:
0.1% of antiwear agent, 0.08% of acrylate type non-silicon defoaming agent, 0.5% of organic sulfur salt, 0.5% of calcium alkyl benzene sulfonate, 0.5% of zinc dialkyl dithiophosphate, 1% of polyethylene glycol and the balance of internal combustion engine oil.
The antiwear agent was prepared in the same manner as in example 1.
The high-temperature-resistant high-dispersity graphene nano microchip engine oil is prepared by the following method:
(10) adding the antiwear agent into a surfactant polyethylene glycol in proportion, carrying out ultrasonic treatment for 5min at 150w, and uniformly dispersing to obtain a first mixed solution;
(20) adding the acrylate type non-silicon defoaming agent, the organic sulfur salt, the calcium alkyl benzene sulfonate and the zinc dialkyl dithiophosphate in the proportion into the engine oil of the internal combustion engine, carrying out ultrasonic treatment for 5min at 150w, and uniformly dispersing to obtain a second mixed solution;
(30) and adding the first mixed solution into the second mixed solution, performing 150w ultrasonic treatment for 5min, and uniformly dispersing to obtain the high-temperature-resistant high-dispersity graphene nanoplatelets engine oil.
Example 4
The embodiment 4 of the invention provides high-temperature-resistant high-dispersity graphene nano microchip engine oil and a preparation method thereof, wherein the graphene nano microchip engine oil comprises the following components in percentage by weight:
0.8% of antiwear agent, 0.08% of acrylate type non-silicon defoaming agent, 0.5% of organic phosphate, 1.0% of calcium alkyl benzene sulfonate, 1.0% of zinc dialkyl dithiophosphate, tween-802% and the balance of gear oil.
The antiwear agent was prepared in the same manner as in example 1.
The high-temperature-resistant high-dispersity graphene nano microchip engine oil is prepared by the following method:
(10) adding the antiwear agent into a surfactant Tween-80 in proportion, performing ultrasonic treatment at 150w for 5min, and uniformly dispersing to obtain a first mixed solution;
(20) adding the acrylate type non-silicon defoaming agent, the organic phosphorus salt, the calcium alkyl benzene sulfonate and the zinc dialkyl dithiophosphate in the proportion into gear oil, carrying out ultrasonic treatment for 5min at 150w, and uniformly dispersing to obtain a second mixed solution;
(30) and adding the first mixed solution into the second mixed solution, performing 150w ultrasonic treatment for 5min, and uniformly dispersing to obtain the high-temperature-resistant high-dispersity graphene nanoplatelets engine oil.
Comparative example 1
The invention provides a nano microchip engine oil added with graphene oxide and a preparation method thereof, wherein the nano microchip engine oil comprises the following components in percentage by weight:
1% of graphene oxide, 0.1% of acrylate type non-silicon defoaming agent, 1.0% of diphenylamine, 0.5% of calcium alkyl benzene sulfonate, 1.0% of zinc dialkyl dithiophosphate, 3% of oleic acid and the balance of internal combustion engine oil.
The graphene oxide nano microchip engine oil is prepared by the following method:
(10) adding the graphene oxide in the proportion into surfactant oleic acid, performing ultrasonic treatment for 5min at 150w, and uniformly dispersing to obtain a first mixed solution;
(20) adding the acrylate type non-silicon defoaming agent, diphenylamine, calcium alkylbenzene sulfonate and zinc dialkyl dithiophosphate into internal combustion engine oil according to the above proportion, performing ultrasonic treatment for 5min at 150w, and uniformly dispersing to obtain a second mixed solution;
(30) and adding the first mixed solution into the second mixed solution, performing ultrasonic treatment for 5min at 150w, and uniformly dispersing to obtain the graphene oxide nano-microchip engine oil.
The high-temperature-resistant high-dispersibility graphene nanoplatelet engine oil prepared in the embodiments 1 to 4 of the invention and the graphene oxide nanoplatelet engine oil prepared in the comparative example 1 are used for measuring the wear resistance of each product by a four-ball machine. The test conditions were as follows: using an instrument: the Shandong is a MMW-1 universal friction and wear testing machine; test temperature: 73-77 ℃; main shaft rotating speed: 1150-1250 r/min; test load: 390 to 394N; test time: and (4) 1 h. The test results are shown in table 1.
As seen from table 1, compared with graphene oxide as an anti-wear additive, the anti-wear performance of the lubricating oil is significantly improved by the graphene anti-wear additive modified by the carbon nitride nanotube.
The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.
Claims (8)
1. The high-temperature-resistant high-dispersity graphene nano microchip engine oil is characterized by comprising the following components in percentage by weight:
0.1-1.0% of an antiwear agent, 0.05-0.1% of a defoaming agent, 0.5-1.5% of an antioxidant, 0.5-1.5% of a metal cleaning agent, 0.5-1.5% of a metal corrosion inhibitor, 1-3% of a surfactant and the balance of base oil;
the antiwear agent is a carbon nitride nanotube modified graphene composite material.
2. The high-temperature-resistant high-dispersity graphene nanoplatelet engine oil as claimed in claim 1, wherein the antiwear agent is prepared by the following method:
dissolving graphene oxide in toluene, and performing ultrasonic dispersion to form a graphene oxide dispersion liquid;
dissolving sodium azide and cyanuric chloride in toluene to form a reaction solution;
adding the reaction solution into the graphene oxide dispersion solution, and performing secondary ultrasonic dispersion to form a mixed solution;
adding the mixed solution into a reaction kettle to perform a solvothermal reaction to prepare a carbon nitride modified graphene composite material;
centrifuging and washing to obtain the antiwear agent.
3. The high-temperature-resistant high-dispersity graphene nanoplatelet engine oil as claimed in claim 2, wherein the concentration of the graphene oxide dispersion liquid is 0.10-0.16 mg/mL.
4. The high-temperature-resistant high-dispersity graphene nanoplatelet engine oil as claimed in claim 3, wherein the concentration of sodium azide in the reaction solution is 40-50 mg/mL, and the concentration of cyanuric chloride is 40-45 mg/mL.
5. The high-temperature-resistant high-dispersity graphene nanoplatelet engine oil as claimed in claim 2, wherein the reaction conditions of the solvothermal reaction are as follows: the reaction temperature is 200-230 ℃, and the reaction time is 12-18 h.
6. The high-temperature-resistant high-dispersity graphene nanoplatelet engine oil as claimed in claim 1, wherein the defoaming agent is an acrylate type non-silicon defoaming agent; and/or
The antioxidant is at least one of organic sulfur salt, organic phosphorus salt and diphenylamine; and/or
The metal cleaning agent is high-alkali-value calcium alkyl benzene sulfonate; and/or
The metal corrosion inhibitor is zinc dialkyl dithiophosphate; and/or
The surfactant is at least one of oleic acid, tween-80 and polyethylene glycol.
7. The high-temperature-resistant high-dispersity graphene nanoplatelet engine oil as claimed in claim 1, wherein the base oil is internal combustion engine oil or gear oil.
8. The preparation method of the high-temperature-resistant high-dispersity graphene nanoplatelet engine oil as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps:
adding an antiwear agent into a surfactant, and uniformly dispersing by ultrasonic to obtain a first mixed solution;
adding a defoaming agent, an antioxidant, a metal cleaning agent and a metal corrosion inhibitor into base oil, and uniformly dispersing by ultrasonic to obtain a second mixed solution;
and adding the first mixed solution into the second mixed solution, and uniformly performing ultrasonic dispersion to obtain the high-temperature-resistant high-dispersity graphene nanoplatelets engine oil.
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| US20140038862A1 (en) * | 2012-08-06 | 2014-02-06 | Exxonmobil Research And Engineering Company | Anti-wear performance of lubricants using carbon nanoplatelets |
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| US20140038862A1 (en) * | 2012-08-06 | 2014-02-06 | Exxonmobil Research And Engineering Company | Anti-wear performance of lubricants using carbon nanoplatelets |
| CN105316077A (en) * | 2015-11-16 | 2016-02-10 | 青岛领军节能与新材料研究院 | Graphene and carbon nitride quantum dot composite nanometer material, as well as lubricating oil friction improver |
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