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Lubricating oil additive based on single-layer or more-layer graphene

A lubricating oil additive, lubricating oil technology, applied in the directions of additives, petroleum industry, lubricating compositions, etc., can solve the problems of difficult to disperse base oil, expensive carbon nanotubes, etc., achieve excellent stability and dispersibility, improve lubrication and anti-wear performance, the effect of reducing energy consumption

Inactive Publication Date: 2010-08-25
JIANGSU POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent "A Preparation Method of Carbon Nanotube Antifriction Enhancer", Patent No. 200610043593.5, uses carbon nanotubes as lubricating oil enhancer, but carbon nanotubes are expensive and difficult to disperse evenly in base oil

Method used

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  • Lubricating oil additive based on single-layer or more-layer graphene
  • Lubricating oil additive based on single-layer or more-layer graphene
  • Lubricating oil additive based on single-layer or more-layer graphene

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Embodiment Construction

[0014] Below in conjunction with example, further illustrate the content of the present invention:

[0015] Case number one:

[0016] Preparation of graphene: using improved Hummer method in 98% concentrated sulfuric acid, low temperature cooling, adding natural flake graphite and NaNO during stirring 3 and KMnO 4 , the temperature of the reaction solution is controlled at 0 ~ 10 ° C, and the high temperature reaction is carried out after stirring for 5 hours. The temperature of the reaction solution does not exceed 100 ° C, and the stirring is continued for 30 minutes. The solution after the reaction is diluted with deionized water, and an appropriate amount of H is added. 2 O 2 , filter while hot, and wash the filtered product with deionized water until there is no SO in the filtrate 4 2- , then dried, ground and sieved, and then rapidly heat-treated at 1200 °C to obtain single-layer or several-layer graphene flakes.

[0017] According to mass percentage, 0.01% of singl...

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Abstract

The invention relates to a lubricating oil additive based on single-layer or more-layer graphene, belonging to new high-tech materials and application field thereof and being mainly used for improving the property of lubricating oil. The lubricating oil additive is characterized in that single-layer or more-layer graphene and a dispersing agent are added into base oil, the content of the single-layer or more-layer graphene in the base oil is 0.0001-10 percent by mass, and the content of the dispersing agent in the lubricating oil is 0.001-2 percent by mass. The graphene has high specific surface area and thickness of 0.34-10 nanometers, is shaped as a sheet, is combined with the dispersing agent after being subjected to surface modification, and has excellent stability and dispersity in the base oil without easily precipitating like other additives. Under same filling amount, compared with the sheet graphite and the traditional graphite, more graphene can be absorbed on the secondary surface of the friction, the lubricating and anti-wear property of the base oil is improved, and the bearing capacity is enhanced.

Description

Technical field [0001] The invention relates to a lubricating oil additive based on a single layer or several layers of graphene, which belongs to the field of high-tech materials and their applications and is mainly used to improve the performance of lubricating oil. technical background [0002] Friction and wear are ubiquitous in nature. Friction and wear consume more than 50% of the world's primary energy, and wear is one of the main reasons for the scrapping of materials and equipment. Therefore, people use various methods including liquid oil lubrication and solid lubrication to reduce friction and wear. But wear and tear still causes economic losses of tens of billions of dollars to the country every year. Therefore, reducing friction, reducing wear, and extending the life of parts are the goals that researchers in tribology, chemistry, and materials are constantly pursuing. In order to improve the lubrication performance of lubricating oil, various anti-wear and an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M141/08C10M141/06C10M125/02
Inventor 丁古巧丁建宁袁宁一王晓峰刘跃斌樊勇
Owner JIANGSU POLYTECHNIC UNIVERSITY
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