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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  • Abstract
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  • Application Information

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Problems solved by technology

However, due to the relatively large length and diameter of carbon nanotubes, they are easy to ag

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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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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