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Preparation of molybdenum disulfide quantum dots and application of molybdenum disulfide quantum dots in finished lubricant additive

A lubricating oil additive, molybdenum disulfide technology, applied in the direction of molybdenum sulfide, additives, lubricating compositions, etc., can solve the problems of insufficient chemical stability and wear resistance of lubricating oil, large specific surface area, high surface activity, etc., to reduce sludge and carbon deposition, good dispersibility, and simple preparation process

Active Publication Date: 2015-06-10
山东利特纳米技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Molybdenum disulfide (MoS2) has good chemical and thermal stability, large specific surface area, and high surface activity. It is an excellent solid lubricant and catalyst. As the particle size of MoS2 becomes smaller, its adhesion on the surface of friction materials The degree of coverage and coverage will be significantly improved, and the anti-wear and anti-friction properties will also be significantly improved. However, the effect of adding large-sized molybdenum disulfide to lubricating oil is not outstanding. Regarding the preparation of nano-sized molybdenum disulfide quantum dots, there are currently few disclosed
Chinese Patent No. CN99104231.X, published on November 22, 2000, is called molybdenum disulfide lubricating oil. The defect of this patent is that steps such as emulsification, precipitation, oil mixing, miscibility, and total blending are used, and the process is complicated. In terms of performance, the chemical stability and wear resistance of the lubricating oil are insufficient

Method used

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  • Preparation of molybdenum disulfide quantum dots and application of molybdenum disulfide quantum dots in finished lubricant additive
  • Preparation of molybdenum disulfide quantum dots and application of molybdenum disulfide quantum dots in finished lubricant additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of molybdenum disulfide quantum dots:

[0029] Weigh 1 mol of ammonium molybdate, 5 mol of sulfur powder, and 10 mol of glycerin into a reaction kettle, stir, heat to 150°C, and react at a constant temperature for 3 hours; add 1 mol of toluene non-polar solvent to the reaction liquid to extract unreacted sulfur powder;

[0030] The solution in the lower layer was washed repeatedly with water, and the precipitate was dried to make molybdenum disulfide quantum dot powder.

[0031] The lubricating oil additive containing the molybdenum disulfide quantum dots prepared by the above-mentioned method is prepared by the conventional preparation method in this field, and the proportion of components by weight is as follows:

[0032] Graphene 0.001 part,

[0033] Molybdenum disulfide quantum 0.001 part,

[0034] 80 parts of sorbitan oleate;

[0035] The graphene selected is graphene with 1-10 layers, and the molybdenum disulfide quantum is prepared by the above met...

Embodiment 2

[0037] The preparation of molybdenum disulfide quantum dots is the same as in Example 1, and will not be repeated here.

[0038] The lubricating oil additive containing the molybdenum disulfide quantum dots prepared by the above method is prepared by the conventional preparation method in this field, and the ratio of the parts by weight of the components is as follows:

[0039] 0.5 parts of graphene,

[0040] Molybdenum disulfide quantum 0.5 parts,

[0041] 90 parts of sorbitan oleate;

[0042] The graphene selected is multi-layer graphene with 20-30 layers, and the molybdenum disulfide quantum is prepared by the above method with a size less than 10nm.

Embodiment 3

[0044] The preparation of molybdenum disulfide quantum dots is the same as in Example 1, and will not be repeated here.

[0045] The lubricating oil additive containing the molybdenum disulfide quantum dots prepared by the above method is prepared by the conventional preparation method in this field, and the ratio of the parts by weight of the components is as follows:

[0046] 10 parts of graphene,

[0047] Molybdenum disulfide quantum 10 parts,

[0048] 100 parts of sorbitan oleate;

[0049] The selected graphene is modified graphene with hydroxyl groups, and the molybdenum disulfide quantum is prepared by the above method with a size less than 10nm.

[0050] figure 1 It is a TEM image of molybdenum disulfide quantum dots. It can be seen that the molybdenum disulfide quantum dots prepared by the present invention are uniform in size, with a size of 3nm to 5nm and good dispersion.

[0051] The extreme pressure and anti-wear properties of lubricating oil additives were eva...

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Abstract

The invention discloses preparation of molybdenum disulfide quantum dots and application of the molybdenum disulfide quantum dots in a finished lubricant additive, relating to the field of lubricant additives. The molybdenum disulfide quantum dots are prepared from ammonium molybdate, sulfur powder, glycerol and toluene. The finished lubricant additive is composed of the following components in parts by weight: 0.001-10 parts of graphene, 0.001-10 parts of molybdenum disulfide quantum dot and 80-100 parts of sorbitan oleate. The lubricant additive has favorable dispersity, and obviously enhances the oxidation resistance and abrasion resistance when being added into the commercially available lubricant. The lubricant additive has low volatility in the high-temperature service process, and reduces the oil sludge and carbon deposit. No surface modifier is added, the preparation process is simple, and the cost is lowered.

Description

technical field [0001] The invention relates to the field of lubricating oil additives, in particular to the preparation of molybdenum disulfide quantum dots and their application in finished lubricating oil additives. Background technique [0002] With the development of large-scale machinery, large-scale engines are used more and more widely. High-power engines have higher calorific value. Carbon, accelerated engine wear, lubricating oil deterioration and aging and other issues. Under the action of high temperature, the chemical stability of lubricating oil becomes poor, and various functions such as anti-oxidation and wear resistance decrease. At present, commercially available lubricating oils have disadvantages such as poor chemical stability and poor wear resistance under high temperature conditions; while some high-performance commercially available lubricating oils are too expensive, and the promotion field is limited to a certain extent. [0003] Among additives, ...

Claims

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Application Information

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IPC IPC(8): C01G39/06C10M125/22C10M161/00C09K11/68B82Y40/00B82Y30/00C10N30/04C10N30/10C10N30/06
CPCB82Y30/00B82Y40/00C01G39/06C01P2004/04C01P2004/64C09K11/681C10M125/02C10M125/22C10M129/70C10M161/00C10N2030/04C10N2030/06C10N2030/10
Inventor 郑逸群徐秀芳孟良
Owner 山东利特纳米技术有限公司
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