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Functional graphene/montmorillonite/modified molybdenum sulfide lubricating oil additive

A lubricating oil additive and molybdenum sulfide technology, which is applied in the direction of additives, petroleum industry, lubricating composition, etc., can solve the problems of unreported friction surface repair ability, insufficient friction coefficient, friction coefficient reduction, etc., and achieve a significant intelligent repair effect , low cost, and the effect of improving hardness

Active Publication Date: 2019-10-01
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Chinese patent CN201711383769 discloses a lubricating oil additive, preparation method and application of functionalized graphene-loaded montmorillonite. Although the lubricating oil additive has excellent dispersion properties in lubricating oil and has a certain friction reduction and repair ability, but Its coefficient of friction is not low enough
[0003] Molybdenum disulfide (MoS 2 ) is a typical transition metal sulfide, which is composed of two layers of sulfur atoms and a layer of molybdenum atoms in the middle to form a sandwich structure. It is an excellent lubricating material and is widely used in lubricating fluid additives, self-lubricating coatings and solid lubricants and other fields [Shi Kaifeng, Xie Feng. Research Status of Tribological Properties of Tungsten Disulfide Lubricating Additives. Chemical Times, 2017, 31(12): 36-39.], although molybdenum sulfide has excellent anti-friction properties, its friction coefficient The drop is not low enough, and there is no report that it has the ability to repair the friction surface

Method used

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  • Functional graphene/montmorillonite/modified molybdenum sulfide lubricating oil additive
  • Functional graphene/montmorillonite/modified molybdenum sulfide lubricating oil additive
  • Functional graphene/montmorillonite/modified molybdenum sulfide lubricating oil additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) First, 160 g of an aqueous dispersion of graphene oxide having a concentration of 0.025 wt % was prepared. Then, 6 mL of silane coupling agent (A-1100) was added, and magnetically stirred at room temperature for 1 h. Finally, it was transferred to a flask and reacted in a water bath at 80°C for 2h. After separation and cleaning, an appropriate amount of deionized water is added to obtain an aqueous dispersion of functional graphene oxide.

[0026] (2) Weigh 0.04g of molybdenum sulfide and add water and stir evenly to obtain an aqueous dispersion of molybdenum sulfide, add 6mL of silane coupling agent (A-1100) and stir at room temperature for 1h, heat at 80°C for 2h, separate and wash to obtain modified vulcanization molybdenum.

[0027] (3) Take the above-mentioned modified molybdenum sulfide, 0.16g of montmorillonite and the above-mentioned functional graphene oxide aqueous dispersion and mix and stir for 1h; transfer to the reaction kettle for 4h of hydrothermal...

Embodiment 2

[0031] (1) First, 160 g of an aqueous dispersion of graphene oxide having a concentration of 0.025 wt % was prepared. Then, 1 mL of silane coupling agent (A-1110) was added and reacted at 25° C. for 5 h. After separation and cleaning, an appropriate amount of deionized water is added to obtain an aqueous dispersion of functional graphene oxide.

[0032] (2) Weigh 0.01 g of molybdenum sulfide, add water and stir evenly to obtain an aqueous dispersion of molybdenum sulfide, add 0.5 mL of silane coupling agent (A-1110) to react at 25° C. for 8 hours, separate and wash to obtain modified molybdenum sulfide.

[0033] (3) Mix and stir the aqueous dispersion of the above-mentioned modified molybdenum sulfide, 0.02g montmorillonite and the above-mentioned functional graphene oxide for 0.5h; transfer to an autoclave for 200°C hydrothermal reaction for 1h, let it stand for cooling; separate, wash, Dry to obtain functional graphene / montmorillonite / modified molybdenum sulfide composite l...

Embodiment 3

[0037] (1) First, 160 g of an ethanol dispersion of graphene oxide having a concentration of 0.025 wt % was prepared. Then, 8 mL of silane coupling agent (A-1120) was added, and the mixture was refluxed at 80° C. for 1 h. After separation and cleaning, an appropriate amount of ethanol is added to obtain an ethanol dispersion of functional graphene oxide.

[0038] (2) Weigh 0.16g of molybdenum sulfide and add ethanol and stir evenly to obtain ethanol dispersion of molybdenum sulfide, add 16mL of silane coupling agent (A-1120) to react at 60°C for 3h, separate and wash to obtain modified molybdenum sulfide.

[0039] (3) Take the above-mentioned modified molybdenum sulfide, 0.32g montmorillonite and the ethanol dispersion of the above-mentioned functional graphene oxide and mix and stir for 2h; transfer to a flask and heat at reflux for 5h at 100°C, let stand and cool; separate, wash, and dry to obtain Functional graphene / montmorillonite / modified molybdenum sulfide composite lub...

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Abstract

The invention discloses a functional graphene / montmorillonite / modified molybdenum sulfide lubricating oil additive. The lubricating oil additive is prepared from graphene oxide, molybdenum sulfide, montmorillonite and a silane coupling agent, wherein the graphene oxide and the molybdenum sulfide are treated with the silane coupling agent, and the graphene oxide and the molybdenum sulfide are mixedwith the montmorillonite and heated to obtain the lubricating oil additive, the mass ratio of the graphene oxide to the molybdenum sulfide to the montmorillonite is 1 to (0.25-4) to (0.5-8). A tribological performance test is carried out on the lubricating oil additive, the friction coefficient can be obviously reduced with a very small addition amount, and the lubricating oil additive has excellent antifriction and abrasion-resistant capability.

Description

technical field [0001] The invention relates to the technical field of lubricating oil additives, in particular to a functional graphene / montmorillonite / modified molybdenum sulfide lubricating oil additive. Background technique [0002] Chinese patent CN201711383769 discloses a lubricating oil additive, preparation method and application of functionalized graphene-loaded montmorillonite. Although the lubricating oil additive has excellent dispersion properties in lubricating oil and has a certain friction reduction and repair ability, but Its coefficient of friction reduction is not low enough. [0003] Molybdenum disulfide (MoS 2 ) is a typical transition metal sulfide, which is composed of two layers of sulfur atoms and a layer of molybdenum atoms in the middle to form a sandwich structure. It is an excellent lubricating material and is widely used in lubricating fluid additives, self-lubricating coatings and solid lubricants and other fields [Shi Kaifeng, Xie Feng. Rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/00C10N30/04C10N30/06
CPCC10M125/00C10M2201/041C10M2201/066C10M2201/103C10M2201/14C10N2030/04C10N2030/06
Inventor 郝青丽杨锐雷武夏锡锋
Owner NANJING UNIV OF SCI & TECH
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