A kind of oleic acid-lanthanum trifluoride-graphene composite lubricating oil antiwear agent and preparation method thereof

A graphene composite and lanthanum trifluoride technology, which is applied in the field of lubricating oil anti-wear agents, can solve the problems that nano-lanthanum trifluoride and graphene are easy to agglomerate, cannot fully exert lubrication and anti-wear, and achieve good thermal stability and Effects of chemical stability, good solubility and dispersibility, and excellent stability

Active Publication Date: 2019-08-02
SICHUAN CARBON WORLD TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, oleic acid, lanthanum trifluoride, and graphene all have excellent lubricating effects, and the latter two also have excellent extreme pressure and anti-wear properties. There have been reports in the field of using lanthanum trifluoride for lubricating oil. However, nano-lanthanum trifluoride and graphene are easy to agglomerate in common solvents, and cannot fully exert the effect of lubrication and anti-wear

Method used

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  • A kind of oleic acid-lanthanum trifluoride-graphene composite lubricating oil antiwear agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, ammonium fluoride (the concentration of ammonium fluoride is 0.62 mol / L) and graphene oxide nanosheets (oligolayer graphene with a sheet diameter of 0.8 μm, and the mass percentage of graphene oxide is 1%) were added to the containing 35% ethanol aqueous solution, then add lanthanum nitrate solution dropwise at 60°C (the concentration of lanthanum nitrate solution is 0.30mol / L), about 2h, 120ml saturated ethanol solution (containing 4ml oleic acid) is added to the flask, After another 3 hours, the product was gradually cooled to room temperature, filtered, washed repeatedly with deionized water and ethanol, and finally dried at 80°C for 12 hours to obtain antiwear agent A;

[0023] Anti-wear agent A was added to the base oil in different mass ratios, and ball milled. At the same time, 0.03% mass ratio of dispersant (boride of succinimide) was added, and 0.02% mass ratio of emulsifier (stearic acid Sodium and saponin emulsifier), the ball milling time is 10 minute...

Embodiment 2

[0025] First, ammonium fluoride (the concentration of ammonium fluoride is 1.20 mol / L) and graphene oxide nanosheets (oligolayer graphene with a sheet diameter of 1 μm, and the mass percentage of graphene oxide is 5%) are added to the ethanol-containing 35% aqueous solution. Then add lanthanum nitrate solution dropwise at 100°C (the concentration of lanthanum nitrate solution is 0.01mol / L), about 3h, 120ml saturated ethanol solution (including 4ml oleic acid) is added into the flask, and after another 3h, wait until the product gradually After cooling to room temperature, filter, wash repeatedly with deionized water and ethanol, and finally dry at 80°C for 12 hours to obtain antiwear agent B;

[0026] Add anti-wear agent B into the base oil in different mass ratios, and perform ball milling. At the same time, 0.03% mass ratio of dispersant (montanic acid ester) and 0.02% mass ratio of emulsifier (sodium stearate and saponin emulsification agent), the ball milling time was 10 ...

Embodiment 3

[0028] First, ammonium fluoride (the concentration of ammonium fluoride is 0.02 mol / L) and graphene oxide nanosheets (oligolayer graphene with a sheet diameter of 0.9 μm, and the mass percentage of graphene oxide is 0.1%) were added to the containing Ethanol 35% aqueous solution, then add lanthanum nitrate solution dropwise at 80°C (the concentration of lanthanum nitrate solution is 0,60mol / L), about 4h, 120ml saturated ethanol solution (including 4ml oleic acid) is added to the flask , after another 3 hours, after the product was gradually cooled to room temperature, it was filtered, washed repeatedly with deionized water and ethanol, and finally dried at 80°C for 12 hours to obtain anti-wear agent C;

[0029] Add anti-wear agent C to the base oil in different mass ratios, and perform ball milling. At the same time, 0.03% mass ratio of dispersant (montanic acid ester) is added, and 0.02% mass ratio of emulsifier (sodium stearate and saponin emulsification agent), the ball mil...

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Abstract

The invention discloses a preparation method of an oleic acid-lanthanum trifluoride-graphene compounded lubricating oil antiwear agent, belonging to the technical field of lubricating oil. The preparation method comprises the following steps: firstly adding ammonium fluoride and graphene oxide into an ethanol aqueous solution, then adding a lanthanum nitrate solution drop by drop therein under a condition of 60 to 100 DEG C for 2.5 to 3.5h, then adding 120ml of saturated ethanol solution, which contains 4ml of oleic acid, then filtrating 3h later, washing repeatedly by using deionized water and ethanol, and finally drying at 80 DEG C for 12h to obtain the oleic acid-lanthanum trifluoride-graphene compounded lubricating oil antiwear agent. The lubricating oil antiwear agent disclosed by the invention has excellent heat stability and chemical stability, and can prevent oxidation and reaction with metal and the like in hot environment; meanwhile, the lubricating oil has the advantages of being more excellent in stability, lubricating property, oxidation resistance, wear-resisting and anti-friction performance and the like; and the antiwear agent can be widely applied to various mechanical antifriction and wear-resistant fields such as vehicles, boats, tracks and the like.

Description

technical field [0001] The invention relates to the technical field of lubricating oil antiwear agents, in particular to an oleic acid-lanthanum trifluoride-graphene composite lubricating oil antiwear agent and a preparation method thereof. Background technique [0002] Graphene has received widespread attention since it was discovered to exist stably in 2004. It is a two-dimensional material with a thickness of only one atomic layer. The theoretical thickness is only 0.35nm. More than 100 times. [0003] However, there are still big problems in the application of graphene. Graphene has a six-membered ring structure, which makes it have very stable chemical properties, and there are no functional groups on the surface, which is inconvenient for functional modification. The polarity is weak and it is difficult to stabilize. Dispersed in common organic solvents and water. There is a strong van der Waals force between graphene sheets. Even if a dispersant is added, it cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M141/02C10M169/04C10M177/00C10N30/06C10N30/10
CPCC10M141/02C10M169/04C10M177/00C10M2201/041C10M2201/081C10M2207/126C10N2030/06C10N2030/10C10N2010/06
Inventor 康武丽刘军辉丁立连金杯张仲才
Owner SICHUAN CARBON WORLD TECH CO LTD
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