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Method for preparing two-dimensional layered nanometer material

A two-dimensional layered nano and two-dimensional material technology, applied in nano-carbon, chemical instruments and methods, molybdenum sulfide, etc., can solve the problems of long experiment time, dangerous cost, low efficiency, etc., to reduce energy consumption and reduce emissions , The effect of preparation method and steps is simple

Pending Publication Date: 2019-11-15
深圳中科智车联合发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These process routes realize the exfoliation of bulk materials into nanosheets, but there are also toxic, difficult to recycle, volatile, dangerous and high-cost reagents, such as ammonia, N-methylpyrrolidone, 1-methyl-2 -Pyrrolidone, organic lithium, etc. Solving these problems to make it an environmentally friendly and sustainable stripping process is still a challenging work
Water freezing expansion peels off two-dimensional materials to obtain nanosheets with a thickness of about 5nm, but the experiment takes a long time and the efficiency is low, so it is necessary to improve the efficiency

Method used

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  • Method for preparing two-dimensional layered nanometer material
  • Method for preparing two-dimensional layered nanometer material
  • Method for preparing two-dimensional layered nanometer material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Disperse 0.38g LiOH and 0.61g NaOH in 60mL deionized water until completely dissolved, and disperse 0.51g block molybdenum disulfide in the transparent solution with magnetic stirring for 2h. Next, the suspension was transferred to a 100 mL autoclave reaction and maintained at 220 °C for 6 h at a speed of 10 rpm. The suspension solution containing molybdenum disulfide was added to a wall breaker with double four-leaf rotating blades, and the rotating blades were sheared 5 times at a speed of 18000 rpm (each sheared for 2 minutes and intermittently for 15 minutes) to obtain nanosheets.

[0028] Application: Weigh 16mg of the above MoS 2 The nanosheets are evenly dispersed in the 500SN base oil, and the friction coefficient is found to be 35.13% lower than that of the base oil through tribological tests.

[0029] from figure 2 As can be seen in , the steel surface worn by the base oil has fairly rough marks, wide and deep grooves. Instead, the MoS 2 Added to the base...

Embodiment 2

[0032] Disperse 0.38g LiOH and 0.32g NaOH in 60mL deionized water until completely dissolved, and disperse 0.52g block graphite in the transparent solution with magnetic stirring for 2h. Next, the suspension was transferred to a 100 mL autoclave reaction and maintained at 220 °C for 6 h at a speed of 10 rpm. The graphite-containing suspension solution was added to a wall breaker with double four-leaf rotating blades, and the rotating blades were sheared 5 times at a speed of 18,000 rpm (each sheared for 2 minutes with an interval of 15 minutes) to obtain nanosheets.

[0033] Application: Weigh 16mg of the above-mentioned graphene and evenly disperse it in 100SN base oil. After tribological tests, it is found that the friction coefficient has decreased by 30.83% compared with the base oil.

Embodiment 3

[0035]Disperse 0.25g LiOH and 0.61g NaOH in 60mL deionized water until completely dissolved, and disperse 0.49g block boron nitride in the transparent solution with magnetic stirring for 2h. Next, the suspension was transferred to a 100 mL autoclave reaction and maintained at 220 °C for 6 h at a speed of 10 rpm. Add the boron nitride-containing suspension solution into a wall breaking machine with double four-leaf rotating blades, and the rotating blades shear 5 times at a speed of 18,000 rpm (each shearing is 2 minutes with an interval of 15 minutes) to obtain nanosheets.

[0036] Application: Weigh 16 mg of the above-mentioned boron nitride nanosheets and evenly disperse them in 150SN base oil. Tribological tests show that the friction coefficient has decreased by 32.12% compared with the base oil.

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Abstract

The invention discloses a method for preparing a two-dimensional layered nanometer material. The method comprises the following steps of S1, dispersing LiOH and NaOH into deionized water till completedissolution; S2, dispersing a blocky two-dimensional material into a transparent solution for magnetic stirring till dispersion is uniform; S3, transferring a suspension into a stainless high-pressure reactor adopting polytetrafluoroethylene as a liner, and performing maintaining at the speed of 5-15 rpm under the temperature of 180-240 DEG C for 2-10 h; S4, adding the suspension obtained after the reaction is ended into a high speed blender provided with dual four-blade rotating blades, wherein the rotating blades perform shearing repeatedly at the speed of 18,000 rpm to obtain the two-dimensional layered nanometer material. The blocky two-dimensional material in S2 is obtained by adopting a graphite mixture, the graphite mixture is pretreated, the pretreated graphite mixture has the good dissolubility and dispersibility, and the better friction performance can be obtained through a smaller amount of graphite mixture.

Description

technical field [0001] The present invention relates to a preparation method of a two-dimensional layered nanomaterial, specifically a preparation method of a two-dimensional layered nanomaterial with good tribological properties, and five lubrication methods and a five-layer lubrication protection film in the application of friction performance . Background technique [0002] Although the preparation of two-dimensional layered nanomaterials by the bottom-up method has the advantages of controllable layer number and good quality, its preparation cost is high, the efficiency is low, and the process is complicated, which cannot meet the market's need for cost control. Therefore, the top-down technical route using bulk materials as raw materials has become the main way to realize the industrial application of 2D nanosheet materials, showing a good cost-effective advantage. So far, various exfoliation techniques for the preparation of single-layer or multilayer nanosheets have ...

Claims

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Application Information

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IPC IPC(8): C01G39/06C01B32/19C01B35/14
CPCC01G39/06C01B32/19C01B35/146C01P2004/20C01P2002/82C01P2002/85
Inventor 林万里王国坤
Owner 深圳中科智车联合发展有限公司
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