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Method for performing grain size grading of nanometer molybdenum disulfide by utilizing temperature

A technology of nano-molybdenum disulfide and particle size classification, which is applied in the direction of molybdenum sulfide, nanotechnology for materials and surface science, nanotechnology, etc., and can solve the problem of wide particle size distribution of nano-molybdenum disulfide

Active Publication Date: 2015-03-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the existing technical problem of wide particle size distribution of nano-molybdenum disulfide, and provides a method for classifying nano-molybdenum disulfide particle size using temperature

Method used

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  • Method for performing grain size grading of nanometer molybdenum disulfide by utilizing temperature
  • Method for performing grain size grading of nanometer molybdenum disulfide by utilizing temperature
  • Method for performing grain size grading of nanometer molybdenum disulfide by utilizing temperature

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specific Embodiment approach 1

[0017] Specific embodiment one: a kind of method of utilizing temperature to carry out nano-molybdenum disulfide particle size classification in this embodiment is carried out according to the following steps:

[0018] 1. Add nano-molybdenum disulfide into a dry container, and put it in a vacuum drying oven at 80°C to 130°C for 10 to 24 hours;

[0019] 2. Put the container treated in step 1 into a vacuum glove box, add n-butyllithium n-hexane solution into the container, oscillate to mix the molybdenum disulfide and the solution evenly, and then let it stand in the vacuum glove box for 50-80 hours ;

[0020] 3. Pour off the supernatant in the container treated in step 2, add n-hexane to wash the lower layer of precipitation, then dry in the glove box to obtain the treated molybdenum disulfide powder;

[0021] 4. Add the processed molybdenum disulfide powder obtained in step 3 into the solvent, and perform ultrasonic treatment for 20 to 40 minutes to obtain molybdenum disulfid...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that the vacuum drying temperature in step 1 is 100° C. to 120° C., and the drying time is 12 to 18 hours. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that in step 2, the standing time in the vacuum glove box is 60-70 hours. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for performing grain size grading of nanometer molybdenum disulfide by utilizing temperature, relates to a method for separating granules of different grain diameters of molybdenum disulfide, and aims to solve the technical problem of wide distribution of grain diameters of the existing nano-scale molybdenum disulfide. The method comprises the steps of: 1 drying nanometer molybdenum disulfide; 2 adding n-butyllithium solution into nanometer molybdenum disulfide and standing in a vacuum glove box; 3 separating lower-layer precipitate and drying; 4 adding the treated molybdenum disulfide powder into a solvent to prepare a colloid; 5 heating the colloid, performing centrifugal separation, separating out precipitate, raising the temperature of supernate, performing centrifugal separation again, separating out precipitate, continuously heating and separating the supernate, and drying multilevel precipitates to obtain particles with different grain diameters so as to finish the grain size grading of nanometer molybdenum disulfide. The method can be used for performing grain size grading on powder.

Description

technical field [0001] The invention relates to a method for separating molybdenum disulfide particles with different particle sizes. Background technique [0002] Molybdenum disulfide (MoS 2 ) is widely used in industry due to its good lubricating performance, but its performance is limited by particle size and specific surface area. Layers and other fields have broad application prospects. Nano-MoS 2 Including nanoparticles, nanocomposites, nanosheets, nanorods, nanotubes and fullerene-like nanoparticles, and ordinary MoS 2 Compared to nano-MoS 2 The main performance is more superior, the specific surface area is large, the adsorption capacity is strong, and the reactivity is high. The adhesion and coverage of the surface of the friction material are significantly improved, and the anti-wear and anti-friction performance is doubled. Furthermore, since MoS 2 It has a layered structure, and when alkali metal is inserted into the interlayer, it will show excellent elect...

Claims

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Application Information

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IPC IPC(8): C01G39/06B82Y30/00
CPCB82Y30/00C01G39/06C01P2004/64
Inventor 姜再兴张东杰毛娇王明强程浩黄玉东白永平邵路刘丽
Owner HARBIN INST OF TECH