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Preparation method of carbon nanotube compounded lubricating oil

A carbon nanotube composite and carbon nanotube technology, which is applied in lubricating compositions, petroleum industry, dyeing low-molecular organic compound treatment, etc., can solve the problems of difficult to uniformly disperse lubricating oil, poor lipophilicity, and large length and diameter of carbon nanotubes. question

Inactive Publication Date: 2006-02-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively large length and diameter of carbon nanotubes, they are easy to agglomerate and have poor lipophilicity, making it difficult to disperse evenly in lubricating oil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: get carbon nanotubes (diameter is 20~40 nanometers, length is 1 micron to 50 microns) and oleic acid by mass ratio of 1: 2, join in the toluenesulfonic acid solution after mixing and ultrasonically disperse, then through Heating to reflux for 0.8h, vacuum filtration, the resulting precipitate was washed with cyclohexane or n-hexane or 2-methylpentane solvent, and then washed with deionized water until neutral, and vacuum-dried at 40°C to obtain oleic acid-modified of carbon nanotubes.

[0012] The oleic acid-modified carbon nanotubes are added into diesel engine oil at a content of 0.05% (parts by mass), and ultrasonically dispersed at 50° C. to obtain carbon nanotube lubricating oil. Taking the bearing steel as the friction pair, compared with the base oil without carbon nanotubes, the friction coefficient is reduced by 25%, and the wear amount is reduced by 70%.

Embodiment 2

[0014] Take carbon nanotubes and oleic acid at a mass ratio of 1:10, mix them and add them to a toluenesulfonic acid solution for ultrasonic dispersion, then heat and reflux for 1.5 hours, and vacuum filter, and the obtained precipitate is washed with cyclohexane cyclohexane or n-hexane alkane or 2-methylpentane solvent, then rinsed with deionized water until neutral, and dried in vacuum at 100°C to obtain oleic acid-modified carbon nanotubes.

[0015] The carbon nanotubes coated with oleic acid are added into diesel engine oil at a content of 2% (parts by mass), and ultrasonically dispersed at 90° C. to obtain carbon nanotube lubricating oil. Taking the bearing steel as the friction pair, compared with the base oil without adding carbon nanotubes, the friction coefficient is reduced by 18%, and the wear amount is reduced by 60%.

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PUM

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Abstract

Disclosed is a preparation method of carbon nanotube compounded lubricating oil which comprises the steps of, mixing carbon nano tube and oleic acid by the mass ratio of 1:2-10, charging into toluenesulfonic acid solution for supersonic dispersion, heating and returning flow 0.8-2h, vacuum-pumping filtering, cleaning the obtained precipitate with alkane solvents, flushing to neutral with deionized water, vacuum drying at 40-100 deg C, obtaining carbon nano tube with coated oleic acid, charging carbon nano tube into lubricating oil by the proportion of 0.05-2:98-99.95, supersound dispersing at 50-90 deg C, the lubricating oil is any one selected from conventional diesel engine oil, cylinder oil and gear oil for vehicle.

Description

technical field [0001] The invention relates to a method for coating carbon nanotubes with fatty acids and dispersing them in lubricating oil to form nano lubricating oil. Background technique [0002] Nanoparticles are used in the lubricating oil system, which is different from the traditional loading additives to reduce friction and anti-wear. It can not only form a layer of easy-to-shear film on the friction surface, reduce the number of friction lines, but also perform a certain degree of friction on the friction surface. degree of filling and restoration. In addition, nanoparticles are easier to stably disperse in oil than microparticles. [0003] Carbon nanotubes are a novel nanomaterial with a diameter of 20 to 50 nanometers and a length of several microns to tens of microns. It can be seen that the graphene layer is rolled up in a certain way. It not only has super strong and super tough properties, but also has good self-lubricating properties. Due to the hollow ...

Claims

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Application Information

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IPC IPC(8): C10M125/02C09C3/08C09C1/44
Inventor 陈小华陈传盛刘云泉许龙山
Owner HUNAN UNIV
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