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Method for preparing sheet shaped nano-graphite lubricating oil additive agent

A lubricating oil additive and nano-graphite technology, which is applied in additives, petroleum industry, lubricating compositions, etc., can solve the problems of uneven expansion of expanded graphite, large differences in thickness of nano-graphite flakes, and insufficient natural graphite intercalation treatment. , to achieve the effect of reducing material loss and energy consumption, and improving friction and wear behavior

Inactive Publication Date: 2008-09-24
YANSHAN UNIV
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Problems solved by technology

However, due to insufficient intercalation treatment of natural graphite, the expansion degree of expanded graphite is not uniform, and the thickness of the obtained nano-graphite flakes varies greatly.

Method used

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  • Method for preparing sheet shaped nano-graphite lubricating oil additive agent

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Embodiment Construction

[0011] (a) Preparation of primary expanded graphite: Under laboratory conditions, expanded graphite was prepared by chemical method. Wherein, the raw material used is natural flake graphite with a particle size of 50 meshes (purity: 99.9%, origin: Shandong Nanshu Graphite Company), the intercalation agent is concentrated sulfuric acid with a concentration of 98%, and the oxidant is hydrogen peroxide with a concentration of 30%. Intercalation treatment at room temperature of about 25°C for 10 minutes, and then, the intercalated product was washed with water to a pH value of 8, and then dried at 100°C for 2 hours, and high-temperature puffing treatment was performed at a temperature of 800°C. A primary expanded graphite with an expansion factor of about 200 times is obtained.

[0012] (b) Preparation of expanded graphite worms: using primary expanded graphite as raw material, 98% concentrated sulfuric acid as intercalation agent, 30% hydrogen peroxide as oxidant, and intercalati...

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Abstract

The invention provides a method for preparing a flaky nanometer graphite lubricating oil additive. High-purity natural graphite is used as the raw material of the flaky nanometer graphite lubricating oil additive; and repeated intercalation and expanding processing technology is adopted to prepare graphite expanded uniformly. Ultrasonic oscillation technology is adopted to oscillate and fracture expanded graphite, thus preparing flaky nanometer graphite powder. A certain amount of flaky nanometer graphite powder is added into lubricating oil to improve the frictional wear of mechanical components and parts.

Description

technical field [0001] The invention relates to a preparation method of flake nano-graphite lubricating oil additive. The additive material is added in lubricating oil, which can exhibit excellent anti-friction and anti-wear properties, thereby effectively prolonging the service life of friction pairs. Background technique [0002] Energy and the environment are two major themes of sustainable economic and social development. For mechanical parts, friction and wear are unavoidable. The friction and wear of mechanical parts will not only cause a large loss of materials and energy, but also cause very serious environmental pollution. Adding tribological additives to lubricating oil is one of the important technical means to effectively slow down the friction and wear of mechanical parts and reduce energy loss. [0003] Carbon materials represented by graphite and diamond have been widely used in the field of tribological additives. Many recent research works have shown tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/02C09C3/06C09C3/04C10N30/06
Inventor 张瑞军杨育林齐效文
Owner YANSHAN UNIV
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