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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: 2011-06-15
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 50 mesh natural flake graphite (purity: 99.9%, place of origin: Shandong Nanshu Graphite Company), the intercalating agent is the concentrated sulfuric acid with a concentration of 98%, and the oxidant is hydrogen peroxide with a concentration of 30%. The intercalation treatment was carried out at room temperature of about 25°C for 10 minutes. Subsequently, the intercalated product was washed with water to a pH value of 8, then dried at 100°C for 2 hours, and subjected to high-temperature puffing treatment at a temperature of 800°C. Primary expanded graphite with an expansion ratio of about 200 times was obtained.

[0012] (b) preparation of expanded graphite worms: using primary expanded graphite as a raw material, also using concentrated sulfuric acid with a concentration of 98% as an intercalating agent, hydro...

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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 a flake nano-graphite lubricating oil additive. When the additive material is added to the lubricating oil, it can show excellent anti-friction and anti-wear properties, thereby effectively prolonging the service life of the friction pair. Background technique [0002] Energy and environment are two major themes of sustainable economic and social development. For mechanical parts, friction and wear are inevitable. The friction and wear of mechanical components not only brings a lot of loss of materials and energy, but also causes 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 sho...

Claims

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Application Information

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