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Graphene/molybdenum disulfide composite lubricant and preparation method thereof

A compound lubricant and molybdenum disulfide technology, applied in lubricating compositions, additives, petroleum industry, etc., can solve the problems of limited addition amount, high cost of graphene preparation, and general anti-friction effect, so as to reduce the possibility of adhesive wear High performance, guaranteed long-term performance, and excellent thermal conductivity

Inactive Publication Date: 2017-06-09
SHANGHAI HITECRUN SPECIAL LUBRICATE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding graphene to lubricating oil can exert its unique physical and chemical properties of nanomaterials, and play the role of a pressure-bearing skeleton in lubricating oil, which can significantly enhance the wear resistance of the matrix. However, its anti-friction effect is general, and graphene The preparation cost is high, and the amount of addition is limited

Method used

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  • Graphene/molybdenum disulfide composite lubricant and preparation method thereof
  • Graphene/molybdenum disulfide composite lubricant and preparation method thereof
  • Graphene/molybdenum disulfide composite lubricant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A kind of graphene / molybdenum disulfide composite lubricant is prepared by the method comprising the following steps:

[0031] (1) Preparation of graphene oxide solution

[0032] Add the weighed 5g phosphorus flake graphite (Sigma-Aldrich company, the same below) and 3.75g NaNO in a 1L dry beaker 3 (Shanghai Sinopharm Chemical Reagent Co., Ltd., the same below), and stirred vigorously for 10 minutes. Then, 150 mL of 98% concentrated H 2 SO 4 (Shanghai Sinopharm Chemical Reagent Co., Ltd., the same below) was slowly poured into the above-mentioned beaker, and continued to stir for 30 minutes. Slowly add 20gKMnO 4 (Shanghai Sinopharm Chemical Reagent Co., Ltd., the same below), the addition was completed in 30 minutes, and after stirring for 20 hours, the system showed a purple-red color mixed with a small amount of sequins (graphite). After standing for 5 days, add 500mL water and 30mLH 2 o 2 (Shanghai Sinopharm Chemical Reagent Co., Ltd., the same below), and fin...

Embodiment 2

[0039] The preparation method is basically the same as in Example 1, except that the solvent in the step 1) is ethylene glycol (Shanghai Lingfeng Chemical Reagent Co., Ltd., the same below), and the surfactant is polyvinylpyrrolidone (Aladdin's reagent ( Shanghai) Co., Ltd., the same below), promptly obtains graphene / molybdenum disulfide composite lubricant B.

Embodiment 3

[0041] A kind of graphene / molybdenum disulfide composite lubricant is prepared by the method comprising the following steps:

[0042] (1) the preparation of graphene oxide solution is with embodiment 1;

[0043] (2) Preparation of graphene / molybdenum disulfide composite lubricant

[0044]1) Take 15 mg of the 1 mg / mL graphene oxide solution in the above step (1), and disperse it in 80 mL of deionized water, then add 250 mg of sodium molybdate, 800 mg of thiourea and 450 mg of polyvinylpyrrolidone into it, and stir at room temperature uniform to obtain a precursor solution;

[0045] 2) Put the precursor solution obtained in step 1) into a polytetrafluoroethylene reactor at 240°C for 24 hours;

[0046] 3) Wash the suspension and filtrate obtained in step 2) three times with deionized water and absolute ethanol respectively, and place them in a vacuum oven at 60°C for 12 hours to dry;

[0047] 4) Place the product prepared in step 3) in a quartz boat for heat treatment under th...

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Abstract

The invention discloses a graphene / molybdenum disulfide composite lubricant and preparation and application thereof; the preparation method comprises the steps of 1) mixing in a solvent, graphene oxide solution, a molybdenum source and a surfactant at room temperature according to the mass ratio of 1:(10-20):(20-35), adding a sulfur source, stirring well to obtain a precursor solution having a molar ratio of the sulfur source to the molybdenum source being greater than 2:1; 2) adding the precursor solution of step 1) into a polytetrafluoroethylene reactor at 180-240 DEG C, preferably at 210-240 DEG C, and reacting for 12-36 h, preferably for 24-36 h; 3) washing the suspension and filtered material of step 2) with deionized water 3 times and absolute ethyl alcohol 3 times, and drying in a vacuum oven at 60 DEG C for 12 h; 4) thermally treating the product of step 3) in a quartz boat under the protection of an inert gas to obtain the graphene / molybdenum disulfide composite lubricant. The graphene / molybdenum disulfide composite lubricant of the invention has excellent antifriction property and is an excellent green environment-friendly basic oil additive.

Description

technical field [0001] The invention relates to the field of solid lubricants, in particular to a graphene / molybdenum disulfide composite lubricant and a preparation method thereof. Background technique [0002] Friction and wear are ubiquitous natural phenomena. According to statistics, about 1 / 3-1 / 2 of the energy used in the world is lost in friction. If the frictional force in the working of mechanical equipment can be reduced and the useless frictional loss can be reduced, then energy saving can be realized. [0003] Molybdenum disulfide is a transition metal sulfide with a typical sandwich layered structure. The interlayer force of its crystal structure is relatively weak, and it is easy to slip, and its exposed sulfur atoms can form a strong bond with the metal. Adhesion, so as to adhere to the metal surface, reduce friction and wear, thus play a role in lubrication. Its disadvantages are poor thermal conductivity, low friction coefficient, and easy precipitation an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/00C10N30/06C10N50/08
CPCC10M125/00C10M2201/041C10M2201/066C10N2030/06C10N2050/08
Inventor 王瑞兴王瑞霞
Owner SHANGHAI HITECRUN SPECIAL LUBRICATE SCI & TECH
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