Method for preparing oil-soluble nano-molybdenum disulfide

A nano-molybdenum disulfide, oil-soluble technology, applied in the direction of molybdenum sulfide, nanotechnology, nanotechnology, etc., can solve the problems of inability to realize large-scale application, and achieve industrial mass production, good repeatability, and simple and fast preparation process Effect

Inactive Publication Date: 2015-06-10
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is precisely because of the above two problems that the application of molybdenum disulfide nanoparticles as a lubricating oil additive has not been able to achieve large-scale application

Method used

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  • Method for preparing oil-soluble nano-molybdenum disulfide
  • Method for preparing oil-soluble nano-molybdenum disulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Mix 500 mg ammonium tetrathiomolybdate with 50 g oleylamine.

[0025] 2. The above mixture was stirred at a speed of 500 rpm under the protection of nitrogen with a purity of 99.9%. The mixture was heated to 345 degrees Celsius and kept for 2 hours, then cooled to room temperature to obtain a black liquid.

[0026] 3. Centrifuge the above black liquid for 10 minutes at a centrifugal force of 3000g to obtain a precipitate, and save the supernatant for the next reaction.

[0027] 4. After washing the precipitate repeatedly with ethanol, the oil-soluble ultra-thin nano-molybdenum disulfide can be obtained, and its particle size is about 200 nanometers.

Embodiment 2

[0029] 1. Mix 500mg ammonium tetrathiomolybdate with 100g oleylamine.

[0030] 2. The above mixture was stirred at a speed of 800 rpm under the protection of nitrogen with a purity of 99.9%. The mixture was heated to 350 degrees Celsius and kept for 1.5 hours, then cooled to room temperature to obtain a black liquid.

[0031] 3. Centrifuge the above black liquid for 8 minutes at a centrifugal force of 4000g to obtain a precipitate, and save the supernatant for the next reaction.

[0032] 4. After washing the precipitate repeatedly with ethanol, the oil-soluble ultra-thin nano-molybdenum disulfide can be obtained, and its particle size is about 200 nanometers.

Embodiment 3

[0034] 1. Mix 1000mg ammonium tetrathiomolybdate with 100g oleylamine.

[0035] 2. The above mixture was stirred at a speed of 1000 rpm under the protection of nitrogen with a purity of 99.9%. The mixture was heated to 355 degrees Celsius and kept for 1 hour, then cooled to room temperature to obtain a black liquid.

[0036] 3. Centrifuge the above black liquid for 5 minutes at a centrifugal force of 5000g to obtain a precipitate, and save the supernatant for the next reaction.

[0037] 4. After washing the precipitate repeatedly with ethanol, the oil-soluble ultra-thin nano-molybdenum disulfide can be obtained, and its particle size is about 200 nanometers.

[0038] figure 1 It is the transmission electron microscope figure of the oil-soluble molybdenum disulfide obtained by the preparation method of the present invention. The dark lines in the figure are the edges of the erected molybdenum disulfide layer. Since the dark lines arranged in parallel are hardly observed in the...

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Abstract

The invention discloses a method for preparing oil-soluble nano-molybdenum disulfide. The method comprises the following steps: uniformly mixing ammonium tetrathiomolybdate and oleylamine, continuously stirring in protection of inert gas, heating to 345-455 DEG C, and keeping for 1-2 hours; cooling to room temperature to obtain a black liquid, centrifugally collecting precipitates, and repeatedly washing with an organic solvent to obtain oil-soluble ultra-thin nano-molybdenum disulfide having a grain size of about 200nm. The nano-molybdenum disulfide prepared by the method is only formed by one layer or multiple layers of molecules, has an ultra-thin structure, and can be stably dispersed in a lubricant.

Description

technical field [0001] The invention belongs to a method for preparing nano molybdenum disulfide, in particular to a method for preparing oil-soluble nano molybdenum disulfide. Background technique [0002] Molybdenum disulfide has a layered structure, and the interlayer slip is very easy, so it is a very good solid lubricant. In recent years, with the continuous development of nanotechnology, scientists around the world have prepared many nanoscale molybdenum disulfide particles with different shapes, and studied them as lubricating oil additives, and found that they have good lubricating properties. The Tenne research group in Israel first heated molybdenum trioxide to 850 degrees Celsius to vaporize it, and then introduced hydrogen sulfide gas as a reducing agent to obtain fullerene-like molybdenum disulfide nanoparticles [Zak, A., et al ., Growth Mechanism of MoS2 Fullerene-like Nanoparticles by Gas-Phase Synthesis. Journal of the American Chemical Society, 2000.122(45)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/06B82Y30/00
CPCC01G39/06C01P2004/04C01P2004/52C01P2004/64
Inventor 刘宇宏陈哲陈羿男雒建斌
Owner TSINGHUA UNIV
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