CN110835575A - Graphene engine oil antiwear agent and preparation method thereof - Google Patents
Graphene engine oil antiwear agent and preparation method thereof 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
- C10M169/04—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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- 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
- C10M2201/0413—Carbon; Graphite; Carbon black used as base material
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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
- C10M2201/10—Compounds containing silicon
- C10M2201/102—Silicates
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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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/026—Butene
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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
- C10M2207/28—Esters
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic 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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid
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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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/086—Imides
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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
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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
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
Abstract
The invention provides a graphene engine oil antiwear agent which comprises the following components in parts by weight: 1 part of few-layer graphene, 2-3 parts of refined mineral oil, 2-5 parts of an antiwear agent, 2-3 parts of an antirust agent, 3-4 parts of a dispersant, 0.5-1 part of an oiliness agent, 1-2 parts of a detergent, 0.7-1 part of a viscosity coefficient improver, 0.5-1 part of a salt-resistant agent and 0.2-0.5 part of an ionic liquid, and also provides a preparation method, which comprises the following steps: (1) performing destaticization treatment on refined mineral oil at 50 ℃, and adding few-layer graphene and hydrophobic ionic liquid for ultrasonic dispersion; (2) mixing the mixture obtained in the step (1) with an antiwear agent and an oiliness agent at 90 ℃; (3) mixing a dispersant, an antirust agent, an antiwear agent and a viscosity index improver at the temperature of 80 ℃; (4) and (3) mixing the mixture obtained in the step (2) and the step (3), adding a detergent, heating to 90 ℃, mixing and stirring, and cooling to 50 ℃ to obtain a finished product, wherein the prepared product has high wear resistance and good dispersibility.
Description
Technical Field
The invention relates to the field of lubricating oil, and particularly relates to a graphene engine oil antiwear agent and a preparation method thereof.
Background
The friction and wear are inevitable for mechanical parts, which not only bring a large amount of loss of materials and energy, but also cause environmental pollution, the engine oil is one of important technical means for effectively slowing down the friction and wear of the mechanical parts and reducing the energy loss, is the running blood of modern industry and national defense industry, and consists of base oil and additives, and the rapid development of the modern industry requires the acceleration of the upgrading and updating of the lubricating oil.
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 and weak interaction with molecules of a base oil of compound engine oil, so that the dispersion stability of graphene is poor, and in addition, strong van der waals force exists between graphene sheets, so that the 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 graphene engine oil antiwear agent and the preparation method thereof, which solve the agglomeration phenomenon of graphene in lubricating oil and improve the dispersion stability, thereby fully exerting the antifriction and antiwear performances.
The technical scheme for solving the problems is to provide the graphene engine oil antiwear agent which comprises the following components in parts by weight: 1 part of few-layer graphene, 2-3 parts of refined mineral oil, 2-5 parts of an antiwear agent, 2-3 parts of an antirust agent, 3-4 parts of a dispersing agent, 0.5-1 part of an oiliness agent, 1-2 parts of a detergent, 0.7-1 part of a viscosity coefficient improver, 0.5-1 part of a salt-resistant agent and 0.2-0.5 part of an ionic liquid.
Preferably, the antiwear agent is one or more of long-chain primary alkyl zinc dithiophosphate and primary alkyl zinc dithiophosphate.
Preferably, the antirust agent is dimer acid and phosphate ester, the dispersant is diene-based succinimide, the oiliness agent is ethylene glycol oleate, the detergent is high-alkali synthetic calcium sulfonate, and the viscosity coefficient improver is polyisobutylene.
Preferably, the ionic liquid is a hydrophobic ionic liquid.
Preferably, the salt-resistant agent comprises 53 parts of polyacrylate emulsion and 18 parts of silicate.
Preferably, the hydrophobic ionic liquid comprises a quaternary phosphonium salt type ionic liquid, a quaternary ammonium salt type ionic liquid, [ Cxmim]Br、[Cxmim]One or more of DEHP, wherein X>8。
The preparation method of the graphene engine oil antiwear agent is also provided, and is characterized by comprising the following steps: (1) performing destaticization treatment on refined mineral oil at 50 ℃, and adding few-layer graphene and hydrophobic ionic liquid for ultrasonic dispersion; (2) mixing the mixture obtained in the step (1) with an antiwear agent and an oiliness agent at 90 ℃; (3) mixing a dispersant, an antirust agent, an antiwear agent and a viscosity index improver at the temperature of 80 ℃; (4) and (3) mixing the mixture obtained in the step (2) and the step (3), adding a detergent, heating to 90 ℃, mixing and stirring, and cooling to 50 ℃ to obtain a finished product.
The oil at the piston ring, piston skirt and the like is affected by local high temperature to generate sludge and paint film, the gas mixed into the crankcase can deteriorate the oil to generate deposit to corrode the deposited position, the high-alkali synthetic calcium sulfonate complex dispersant can neutralize acidic substances generated by oxidation and mixed corrosive substances to prevent corrosion and generation of insoluble polymers, and can prevent insoluble components generated by oxidation of the oil and mixed gas from dispersing in the oil to form sludge, but the dispersant diene succinimide is used, water mixed into the lubricating oil is attached to the iron surface of the lubricating oil system, so that iron is electrochemically corroded to rust, so that the antirust dimer acid and phosphate are added, and the dimer acid and the phosphate have an anti-corrosion effect, and active sulfur is generated when the lubricating oil is oxidized to enable Cu-Pb, active sulfur to be generated, Cu-Sn alloy bearing is corroded, the dimer acid and the phosphate ester are also used as anticorrosive agents, and polyisobutene serving as a viscosity index modifier is required to be added for preparing multistage engine oil with excellent viscosity-temperature characteristics, hydraulic oil with high viscosity index and the like.
In addition, the scheme utilizes the ionic liquid to modify few-layer graphene, and selects the hydrophobic ionic liquid such as [ C ]8mim]Br、[C8mim]DEHP、[C10mim]Br、[C10mim]DEHP、[C12mim]Br、[C12mim]DEHP, or ionic liquids with small polarity such as quaternary phosphonium salt type ionic liquids, quaternary ammonium salt type ionic liquids, specifically including p-vinylbenzyl-trialkyl quaternary phosphonium hexafluorophosphate, p-vinylbenzyl-trialkyl quaternary phosphonium tetrafluoroborate, and the like, which are commercially available, and the treatment process is as follows: firstly, using destaticized refined mineral oil as a dispersing solvent, carrying out ultrasonic dispersion on hydrophobic ionic liquid and few-layer graphene, and then adding other auxiliary agents into the graphene machine in a grading and temperature-dividing manner to prepare the graphene machineIn the dispersing step, on one hand, the oil antiwear agent is prepared into hydrophobic ionic liquid and a dopant of few-layer graphene, on the other hand, the hydrophobic ionic liquid is directly dissolved in refined mineral oil as a lubricating oil additive, and the ionic liquid has good performances of nonvolatility, incombustibility, thermal stability, low melting point, good conductivity and the like, is an ideal lubricating material, after the graphene composite material is compounded with few layers of graphene, because the hydrophobic ionic liquid exposed outside the few layers of graphene has a bipolar structure, the hydrophobic ionic liquid is easier to adsorb on the surface of a friction pair, an effective adsorption film can be formed on the surface of the friction pair, on the other hand, the hydrophobic ionic liquid is doped among few-layer graphene sheets through pi-pi action, cation pi-pi action and electrostatic adsorption action, the few-layer graphene is effectively prevented from agglomerating, and the increase of the alkyl chain length of the hydrophobic ionic liquid is beneficial to dispersion in a few-layer graphene organic solvent.
The invention has the following beneficial effects:
1. the hydrophobic ionic liquid is doped between the few-layer graphene sheets through pi-pi action, cation pi-pi action and electrostatic adsorption action, so that the few-layer graphene is effectively prevented from being agglomerated, and the dispersibility is high;
2. in the preparation process, firstly, destaticized refined mineral oil is used as a dispersing solvent, the hydrophobic ionic liquid and the few-layer graphene are subjected to ultrasonic dispersion, the doped few-layer graphene is prepared, meanwhile, the hydrophobic ionic liquid is used as a single additive to be dispersed in the mineral oil, the bifunctional anti-wear agent is formed, other auxiliary agents are added in a grading manner, the dispersibility of the few-layer graphene dopant is improved, and the performance of the anti-wear agent is improved.
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 few-layer graphene: dispersing 0.4g of graphene into 50ml of concentrated nitric acid, magnetically stirring for 7 hours at the temperature of 60 ℃, washing the treated graphene for 5 times by using deionized water, and collecting the graphene for later use after vacuum drying at the temperature of 50 ℃; 100-150mg of dried pretreated graphene and 405mg of ferric chloride hexahydrate are dispersed into 40ml of ethylene glycol solution, 0.15g of sodium citrate, 1.8g of sodium acetate and 1.0g of polyethylene glycol (molecular weight is 20000) are added, and magnetic stirring is carried out for 2 hours after ultrasonic dispersion; and sealing the mixed solution into a high-pressure reaction kettle, placing the high-pressure reaction kettle into a 200 ℃ oven for reaction for 10 hours, washing the obtained few-layer graphene with deionized water for 3 times, drying and collecting.
Preparing hydrophobic ionic liquid doped few-layer graphene: taking 500mg of refined mineral oil subjected to static electricity removal treatment at 50 ℃, adding 30mg of vinylbenzyl-trialkyl quaternary phosphine hexafluorophosphate and 100mg of the few-layer graphene, and performing ultrasonic dispersion for 3 hours to obtain a dopant;
preparing a graphene engine oil antiwear agent: mixing 100mg of hydrophobic ionic liquid doped few-layer graphene, 2000mg of destaticized refined mineral oil, 200mg of zinc primary alkyl dithiophosphate and 50mg of ethylene glycol oleate at 90 ℃; mixing 300mg of diene-based succinimide, 200mg of dimer acid and phosphate ester, 300mg of diene-based succinimide, 70mg of polyisobutylene and 50mg of salt resisting agent (a compound of polyacrylate emulsion and silicate with a mass ratio of 53: 18) at 80 ℃, and stirring for 3 hours; mixing the hydrophobic ionic liquid doped with few-layer graphene and the mixture, adding 100mg of high-alkali synthetic calcium sulfonate, heating to 90 ℃, mixing and stirring, and cooling to 50 ℃ to obtain a finished product.
Example 2
Preparing few-layer graphene: dispersing 0.4g of graphene into 50ml of concentrated nitric acid, magnetically stirring for 7 hours at the temperature of 60 ℃, washing the treated graphene for 5 times by using deionized water, and collecting the graphene for later use after vacuum drying at the temperature of 50 ℃; 100-150mg of dried pretreated graphene and 405mg of ferric chloride hexahydrate are dispersed into 40ml of ethylene glycol solution, 0.15g of sodium citrate, 1.8g of sodium acetate and 1.0g of polyethylene glycol (molecular weight is 20000) are added, and magnetic stirring is carried out for 2 hours after ultrasonic dispersion; and sealing the mixed solution into a high-pressure reaction kettle, placing the high-pressure reaction kettle into a 200 ℃ oven for reaction for 10 hours, washing the obtained few-layer graphene with deionized water for 3 times, drying and collecting.
Preparing hydrophobic ionic liquid doped few-layer graphene: taking 500mg of refined mineral oil subjected to static electricity removal treatment at 50 ℃, adding 30mg of p-vinylbenzyl-trialkyl quaternary phosphine tetrafluoroborate and 100mg of the few-layer graphene, and performing ultrasonic dispersion for 3 hours to obtain a dopant;
preparing a graphene engine oil antiwear agent: mixing 100mg of hydrophobic ionic liquid doped few-layer graphene, 1000mg of destaticized refined mineral oil, 300mg of long-chain primary alkyl zinc dithiophosphate and 100mg of ethylene glycol oleate at 90 ℃; mixing 400mg of diene-based succinimide, 300mg of dimer acid and phosphate, 400mg of diene-based succinimide, 100mg of polyisobutylene and 100mg of salt resisting agent (a compound of polyacrylate emulsion and silicate with a mass ratio of 53: 18) at 80 ℃, and stirring for 3 hours; mixing the hydrophobic ionic liquid doped with few-layer graphene and the mixture, adding 150mg of high-alkali synthetic calcium sulfonate, heating to 90 ℃, mixing and stirring, and cooling to 50 ℃ to obtain a finished product.
Example 3
Preparing few-layer graphene: dispersing 0.4g of graphene into 50ml of concentrated nitric acid, magnetically stirring for 7 hours at the temperature of 60 ℃, washing the treated graphene for 5 times by using deionized water, and collecting the graphene for later use after vacuum drying at the temperature of 50 ℃; 100-150mg of dried pretreated graphene and 405mg of ferric chloride hexahydrate are dispersed into 40ml of ethylene glycol solution, 0.15g of sodium citrate, 1.8g of sodium acetate and 1.0g of polyethylene glycol (molecular weight is 20000) are added, and magnetic stirring is carried out for 2 hours after ultrasonic dispersion; and sealing the mixed solution into a high-pressure reaction kettle, placing the high-pressure reaction kettle into a 200 ℃ oven for reaction for 10 hours, washing the obtained few-layer graphene with deionized water for 3 times, drying and collecting.
Preparing hydrophobic ionic liquid doped few-layer graphene: collecting 500mg of 50 deg.C destaticized refined mineral oil, and adding 30mg of para [ C ]8mim]Carrying out ultrasonic dispersion on DEHP and 100mg of the few-layer graphene for 3h to obtain a dopant;
preparing a graphene engine oil antiwear agent: mixing 100mg of hydrophobic ionic liquid doped few-layer graphene, 1000mg of destaticized refined mineral oil, 250mg of long-chain primary alkyl zinc dithiophosphate and 80mg of ethylene glycol oleate at 90 ℃; mixing 350mg of diene-based succinimide, 250mg of dimer acid and phosphate, 350mg of diene-based succinimide, 90mg of polyisobutylene and 80mg of salt resisting agent (a compound of polyacrylate emulsion and silicate with a mass ratio of 53: 18) at 80 ℃, and stirring for 3 hours; mixing the hydrophobic ionic liquid doped with few-layer graphene and the mixture, adding 200mg of high-alkali synthetic calcium sulfonate, heating to 90 ℃, mixing and stirring, and cooling to 50 ℃ to obtain a finished product.
Example 4
The machine oil anti-wear agent prepared in the examples 1 to 3 and a control anti-wear agent to which no few-layer graphene and no ionic liquid are added into base oil in equal amounts, and a friction coefficient and a wear scar diameter are measured by a four-ball experiment method by using an MRS-1J type wear tester, so that the antifriction and anti-wear properties are evaluated. The contact mode of the friction pair is ball-ball point contact, the used steel ball is a special steel ball (material GCr15, size 12.7mm, Rockwell hardness 59-61HRC) for a four-ball machine, the adopted experimental conditions are load 392N, rotating speed 1200r/min and time 60min, and the results are shown in Table 1.
TABLE 1 abrasion resistance test
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 (7)
1. The graphene engine oil antiwear agent is characterized by comprising the following components in parts by weight: 1 part of few-layer graphene, 10-20 parts of refined mineral oil, 2-3 parts of an antiwear agent, 2-3 parts of an antirust agent, 3-4 parts of a dispersing agent, 0.5-1 part of an oiliness agent, 1-2 parts of a detergent, 0.7-1 part of a viscosity coefficient improver, 0.5-1 part of a salt-resistant agent and 0.2-0.5 part of an ionic liquid.
2. The graphene engine oil antiwear agent according to claim 1, wherein the antiwear agent is one or more of long-chain zinc primary alkyl dithiophosphate and zinc primary alkyl dithiophosphate.
3. The graphene engine oil antiwear agent according to claim 1, wherein the antirust agent is dimer acid and phosphate ester, the dispersant is bis-alkenyl succinimide, the oiliness agent is ethylene glycol oleate, the detergent is high-alkali synthetic calcium sulfonate, and the viscosity coefficient improver is polyisobutylene.
4. The graphene engine oil antiwear agent according to claim 1, wherein the ionic liquid is a hydrophobic ionic liquid.
5. The graphene engine oil antiwear agent according to claim 1, wherein the salt resistant agent comprises 53 parts of polyacrylate emulsion and 18 parts of silicate.
6. The graphene engine oil antiwear agent according to claim 1, wherein the hydrophobic ionic liquid comprises a quaternary phosphonium salt type ionic liquid, a quaternary ammonium salt type ionic liquid, [ C ] Cxmim]Br、[Cxmim]One or more of DEHP, wherein X>8。
7. The preparation method of the graphene engine oil antiwear agent according to claim 1, characterized by comprising the following steps: (1) performing destaticization treatment on refined mineral oil at 50 ℃, and adding few-layer graphene and hydrophobic ionic liquid for ultrasonic dispersion; (2) mixing the mixture obtained in the step (1) with an antiwear agent and an oiliness agent at 90 ℃; (3) mixing a dispersant, an antirust agent, an antiwear agent and a viscosity index improver at the temperature of 80 ℃; (4) and (3) mixing the mixture obtained in the step (2) and the step (3), adding a detergent, heating to 90 ℃, mixing and stirring, and cooling to 50 ℃ to obtain a finished product.
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