CN111909759A - Modified anti-friction graphene lubricating oil and preparation method thereof - Google Patents
Modified anti-friction graphene lubricating oil and preparation method thereof Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 56
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims description 9
- 239000010949 copper Substances 0.000 claims abstract description 22
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002199 base oil Substances 0.000 claims abstract description 16
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 14
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 14
- 239000011707 mineral Substances 0.000 claims abstract description 14
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000002131 composite material Substances 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 20
- 239000011259 mixed solution Substances 0.000 claims description 16
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 10
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 10
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 10
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000005642 Oleic acid Substances 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 10
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 10
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 10
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 10
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 239000008117 stearic acid Substances 0.000 claims description 10
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 8
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 8
- JZCCFEFSEZPSOG-UHFFFAOYSA-L copper(II) sulfate pentahydrate Chemical compound O.O.O.O.O.[Cu+2].[O-]S([O-])(=O)=O JZCCFEFSEZPSOG-UHFFFAOYSA-L 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 4
- 239000003208 petroleum Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000000967 suction filtration Methods 0.000 claims description 4
- 238000009210 therapy by ultrasound Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002105 nanoparticle Substances 0.000 abstract description 6
- 238000005054 agglomeration Methods 0.000 abstract description 3
- 230000002776 aggregation Effects 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 231100000241 scar Toxicity 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004327 boric acid Substances 0.000 description 2
- -1 boric acid ester Chemical class 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002082 metal nanoparticle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
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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
- C10M169/045—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds
-
- 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
-
- 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
- C10M2201/05—Metals; Alloys
-
- 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
- C10M2201/14—Inorganic compounds or elements as ingredients in lubricant compositions inorganic compounds surface treated with organic compounds
-
- 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
- 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
-
- 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
- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
- C10M2227/06—Organic compounds derived from inorganic acids or metal salts
- C10M2227/061—Esters derived from boron
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention relates to graphene lubricating oil, in particular to modified anti-friction graphene lubricating oil which is prepared from the following materials in parts by weight: 0.01-0.05 part of modified graphene, 8-16 parts of borate, 80-90 parts of mineral base oil, 2-4 parts of a dispersing agent and 1-4 parts of an antifoaming agent. The modified anti-friction graphene lubricating oil provided by the invention effectively improves the agglomeration and friction-reducing and wear-resisting effects of graphene by modifying graphene and combining copper nanoparticles to form a compound.
Description
Technical Field
The invention relates to graphene lubricating oil, in particular to modified anti-friction graphene lubricating oil and a preparation method thereof.
Background
The major failure modes of machine equipment and parts are corrosion, breakage and wear loss, wherein wear failure is always easily ignored because it is often a gradual and long-term process. However, once a wear failure occurs, it often causes an unpredictable hazard, including not only immeasurable energy and economic losses, but also even a threat to human life safety. It is reported that the abrasion consumes a large amount of secondary energy, and is very easy to cause machine failure and malignant accidents, and the economic loss caused by the frictional abrasion in China exceeds 30000 billion yuan. In addition, enterprises also invest a large amount of manpower and material resources to regularly maintain and maintain various mechanical parts so as to ensure that equipment can normally and safely operate.
In industrial production and daily life, lubricating oils are commonly used to reduce frictional wear on materials or equipment. In order to increase the friction-reducing and wear-resisting properties of the lubricating oil and improve the service performance of the lubricating oil, graphene is usually added into the lubricating oil to enhance the wear-resisting properties of the lubricating oil. Graphene has excellent friction and wear resistance, but as a lubricant, the specific surface area and the surface energy of the graphene are large, so that the graphene is easy to agglomerate, and in actual use, along with the prolonging of the friction time, an active agent attached to the surface of the graphene is easy to lose efficacy, so that the overall performance, particularly the wear resistance, of the lubricating oil is influenced. In addition, the wear resistance of the lubricating oil is improved by taking the single graphene as the lubricating filler in a limited way.
Disclosure of Invention
In order to solve the problems, the invention provides a modified anti-friction graphene lubricating oil which can effectively improve the wear resistance of graphene and is not easy to agglomerate, and the specific technical scheme is as follows:
the modified anti-friction graphene lubricating oil is prepared from the following materials in parts by mass: 0.01-0.05 part of modified graphene, 8-16 parts of borate, 80-90 parts of mineral base oil, 2-4 parts of a dispersing agent and 1-4 parts of an antifoaming agent.
Further, 0.02-0.03 part of modified graphene, 8-16 parts of borate, 80-90 parts of mineral base oil, 2-4 parts of a dispersing agent and 1-4 parts of an antifoaming agent.
A preparation method of modified anti-friction graphene lubricating oil comprises the following steps:
s1, adding graphene into a modified solvent, wherein the ratio of the graphene to the modified solvent is 0.08-0.12: 100, respectively;
s2, heating the solution to 45-55 ℃, and performing ultrasonic dispersion treatment until graphene is completely dissolved;
s3, sealing and heating the graphene mixed solution to 85-95 ℃, and continuously stirring for 0.5-1 h;
s4, cooling to room temperature, and then carrying out centrifugal drying to obtain modified graphene;
s5, adding the modified graphene into deionized water, wherein the ratio of the modified graphene to the deionized water is 0.08-0.12: 100, performing ultrasonic dispersion treatment for 1.5-2 h;
s6, adding blue copperas, wherein the ratio of blue copperas to deionized water is 0.3-0.5: 100, stirring by ultrasonic waves until the solution is completely dissolved;
s7, stirring the solution at 70-80 ℃, adding the composite solution, and continuously stirring for 2.5-3.5 h;
s8, carrying out suction filtration on the obtained composite mixed solution and washing with deionized water;
s9, drying in vacuum at 60 ℃ to remove the solvent, and obtaining the composite material of copper and modified graphene;
s10, adding the composite material of the copper and the modified graphene into petroleum ether, stirring, and then performing ultrasonic dispersion until the composite material of the copper and the modified graphene is fully dispersed;
and S11, adding mineral base oil, borate, a dispersing agent and an antifoaming agent, and carrying out ultrasonic treatment for 25-35 min.
Further, the modified solution is a mixed solution of oleic acid, stearic acid and cyclohexane, and the volume ratio of the oleic acid to the stearic acid to the cyclohexane is 4-6: 3: 0.1.
further, the composite solution is a mixed solution of hydrazine hydrate and ammonia water, and the volume ratio of the hydrazine hydrate to the ammonia water is 2.8-3.2: 1.
Compared with the prior art, the invention has the following beneficial effects:
the modified anti-friction graphene lubricating oil provided by the invention effectively improves the agglomeration and friction-reducing and wear-resisting effects of graphene by modifying graphene and combining copper nanoparticles to form a compound.
Detailed Description
The present invention will now be further described with reference to examples.
Example one
The modified anti-friction graphene lubricating oil is prepared from the following materials in parts by mass: 0.01 part of modified graphene, 8 parts of borate, 80 parts of mineral base oil, 2 parts of dispersing agent and 1 part of antifoaming agent.
The friction coefficient is reduced by 12%; the wear scar diameter was reduced by 13%.
Example two
The modified anti-friction graphene lubricating oil is prepared from the following materials in parts by mass: 0.02 part of modified graphene, 10 parts of borate, 82 parts of mineral base oil, 2.5 parts of a dispersing agent and 2 parts of an antifoaming agent.
The friction coefficient is reduced by 18%; the wear scar diameter was reduced by 15%.
EXAMPLE III
The modified anti-friction graphene lubricating oil is prepared from the following materials in parts by mass: 0.03 part of modified graphene, 15 parts of borate, 88 parts of mineral base oil, 3 parts of a dispersing agent and 3 parts of an antifoaming agent.
The friction coefficient is reduced by 13%; the wear scar diameter decreased by 11%.
Example four
The modified anti-friction graphene lubricating oil is prepared from the following materials in parts by mass: 0.04 part of modified graphene, 16 parts of boric acid ester, 90 parts of mineral base oil, 4 parts of dispersing agent and 1 part of antifoaming agent.
The friction coefficient is reduced by 9%; the wear scar diameter was reduced by 10%.
EXAMPLE five
The modified anti-friction graphene lubricating oil is prepared from the following materials in parts by mass: 0.05 part of modified graphene, 16 parts of boric acid ester, 90 parts of mineral base oil, 4 parts of dispersing agent and 4 parts of antifoaming agent.
The friction coefficient is reduced by 6 percent; the wear scar diameter decreased by 5%.
The graphene is a good solid lubricant, and can play a certain role in lubricating and filling the surface of a friction pair when the particle size is small. However, after excessive carbon nanotubes are added, the friction reducing performance is weakened because the carbon nanotubes are easy to agglomerate, and the friction factor is improved.
EXAMPLE six
A preparation method of modified anti-friction graphene lubricating oil comprises the following steps:
s1, adding 0.08g of graphene into 100g of modified solvent;
s2, heating the solution to 45 ℃, and performing ultrasonic dispersion treatment until the graphene is completely dissolved;
s3, sealing and heating the graphene mixed solution to 85 ℃, and continuously stirring for 0.5 h;
s4, cooling to room temperature, and then carrying out centrifugal drying to obtain modified graphene;
s5, adding 0.08g of modified graphene into 100ml of deionized water, and performing ultrasonic dispersion treatment for 1.5 h;
s6, adding 0.3g of blue vitriol, and stirring by ultrasonic wave until the blue vitriol is completely dissolved;
s7, stirring the solution at 70 ℃, adding the composite solution, and continuously stirring for 2.5 h;
s8, carrying out suction filtration on the obtained composite mixed solution and washing with deionized water;
s9, drying in vacuum at 60 ℃ to remove the solvent, and obtaining the composite material of copper and modified graphene;
s10, adding the composite material of the copper and the modified graphene into petroleum ether, stirring, and then performing ultrasonic dispersion until the composite material of the copper and the modified graphene is fully dispersed;
and S11, adding mineral base oil, borate, a dispersing agent and an antifoaming agent, and carrying out ultrasonic treatment for 25 min.
Wherein the modified solution is a mixed solution of oleic acid, stearic acid and cyclohexane, and the volume ratio of the oleic acid to the stearic acid to the cyclohexane is 4: 3: 0.1.
the composite solution is a mixed solution of hydrazine hydrate and ammonia water, and the volume ratio of the hydrazine hydrate to the ammonia water is 2.8: 1.
EXAMPLE seven
A preparation method of modified anti-friction graphene lubricating oil comprises the following steps:
s1, adding 0.12g of graphene into 100g of modified solvent;
s2, heating the solution to 55 ℃, and performing ultrasonic dispersion treatment until the graphene is completely dissolved;
s3, sealing and heating the graphene mixed solution to 95 ℃, and continuously stirring for 1 h;
s4, cooling to room temperature, and then carrying out centrifugal drying to obtain modified graphene;
s5, adding 0.12g of modified graphene into 100ml of deionized water, and performing ultrasonic dispersion treatment for 2 hours;
s6, adding 0.5g of blue vitriol, and stirring by ultrasonic wave until the blue vitriol is completely dissolved;
s7, stirring the solution at 80 ℃, adding the composite solution, and continuously stirring for 3.5 h;
s8, carrying out suction filtration on the obtained composite mixed solution and washing with deionized water;
s9, drying in vacuum at 60 ℃ to remove the solvent, and obtaining the composite material of copper and modified graphene;
s10, adding the composite material of the copper and the modified graphene into petroleum ether, stirring, and then performing ultrasonic dispersion until the composite material of the copper and the modified graphene is fully dispersed;
and S11, adding mineral base oil, borate, a dispersing agent and an antifoaming agent, and carrying out ultrasonic treatment for 25-35 min.
The modified solution is a mixed solution of oleic acid, stearic acid and cyclohexane, and the volume ratio of the oleic acid to the stearic acid to the cyclohexane is 6: 3: 0.1.
the composite solution is a mixed solution of hydrazine hydrate and ammonia water, and the volume ratio of the hydrazine hydrate to the ammonia water is 3.2: 1.
The metal nano particles of Au, Ag, Pt, Cu and the like have excellent anti-friction and abrasion-reducing effects. As a soft metal, Cu nano particles are widely applied in the field of antifriction lubrication, on one hand, the price is relatively low, on the other hand, the antifriction and wear-resistant performance is very excellent, researches show that the Cu nano particles can be deposited and adsorbed on a friction contact surface in the friction process and form a layer of protective film, the roughness of the friction contact surface can be improved, the friction dual surface contact is prevented, the wear surface is repaired, the load is born and the interlayer sliding is generated, so that the wear is slowed down, in addition, the friction thermochemical reaction can be generated, and the oxide of copper is generated, so that the antifriction and wear-resistant effects are further exerted.
Copper can be attached to graphene by modifying the graphene, so that the common lubrication of the graphene and the copper is realized.
After modification of the graphene sheets with oleic acid and stearic acid, the hydrophilic segments of the stearic acid and oleic acid molecules are anchored to the surface of the graphene sheets. When the modified graphene is dispersed in the base oil, the long-chain hydrocarbons easily extend into the base oil, so that a typical steric hindrance effect is generated, graphene sheets are separated from each other, the dispersibility is effectively improved, and agglomeration is avoided.
The graphene can also fill grinding marks, so that friction and abrasion are reduced. In addition, the copper nano particles can generate a friction thermal chemical reaction to form copper oxide in the friction process, so that the friction and the abrasion can be further reduced. The modified graphene generates interlayer slippage in the friction process to form a layer of friction transfer film, direct friction contact of the rough surface of a workpiece can be effectively avoided, grooves on the wear surface of the workpiece are shallow, and the damage degree is low, namely, the synergistic friction reduction and wear resistance effects of the copper nanoparticles and the modified graphene are very effective.
Claims (5)
1. The modified anti-friction graphene lubricating oil is characterized by being prepared from the following materials in parts by mass: 0.01-0.05 part of modified graphene, 8-16 parts of borate, 80-90 parts of mineral base oil, 2-4 parts of a dispersing agent and 1-4 parts of an antifoaming agent.
2. The modified anti-friction graphene lubricating oil as claimed in claim 1, is characterized by being prepared from the following materials in parts by mass: 0.02-0.03 part of modified graphene, 8-16 parts of borate, 80-90 parts of mineral base oil, 2-4 parts of a dispersing agent and 1-4 parts of an antifoaming agent.
3. A preparation method of modified anti-friction graphene lubricating oil is characterized by comprising the following steps:
s1, adding graphene into a modified solvent, wherein the ratio of the graphene to the modified solvent is 0.08-0.12: 100, respectively;
s2, heating the solution to 45-55 ℃, and performing ultrasonic dispersion treatment until graphene is completely dissolved;
s3, sealing and heating the graphene mixed solution to 85-95 ℃, and continuously stirring for 0.5-1 h;
s4, cooling to room temperature, and then carrying out centrifugal drying to obtain modified graphene;
s5, adding the modified graphene into deionized water, wherein the ratio of the modified graphene to the deionized water is 0.08-0.12: 100, performing ultrasonic dispersion treatment for 1.5-2 h;
s6, adding blue copperas, wherein the ratio of blue copperas to deionized water is 0.3-0.5: 100, stirring by ultrasonic waves until the solution is completely dissolved;
s7, stirring the solution at 70-80 ℃, adding the composite solution, and continuously stirring for 2.5-3.5 h;
s8, carrying out suction filtration on the obtained composite mixed solution and washing with deionized water;
s9, drying in vacuum at 60 ℃ to remove the solvent, and obtaining the composite material of copper and modified graphene;
s10, adding the composite material of the copper and the modified graphene into petroleum ether, stirring, and then performing ultrasonic dispersion until the composite material of the copper and the modified graphene is fully dispersed;
and S11, adding mineral base oil, borate, a dispersing agent and an antifoaming agent, and carrying out ultrasonic treatment for 25-35 min.
4. The preparation method of the modified anti-friction graphene lubricating oil according to claim 3, wherein the modified solution is a mixed solution of oleic acid, stearic acid and cyclohexane, and the volume ratio of the oleic acid to the stearic acid to the cyclohexane is 4-6: 3: 0.1.
5. the preparation method of the modified anti-friction graphene lubricating oil according to claim 3, wherein the composite solution is a mixed solution of hydrazine hydrate and ammonia water, and the volume ratio of the hydrazine hydrate to the ammonia water is 2.8-3.2: 1.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317086A (en) * | 2022-01-19 | 2022-04-12 | 北京理工大学 | Wear-resistant antifriction graphene lubricating oil and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317086A (en) * | 2022-01-19 | 2022-04-12 | 北京理工大学 | Wear-resistant antifriction graphene lubricating oil and preparation method thereof |
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Application publication date: 20201110 |