Preparation method of expanded graphite lubricating oil

A technology of expanded graphite and expanded graphite powder, which is applied in the petroleum industry, lubricating compositions, additives, etc., can solve the problems of easy temperature failure and narrow applicable temperature range, and achieve the degree of slowing down the deterioration and significantly reducing friction and anti-wear performance. Effect

CN103374434AInactive Publication Date: 2013-10-30夏华松
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-10-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of expanded graphite lubricating oil. The preparation method comprises preparation of expanded graphite worms and preparation of expanded graphite powder. The expanded graphite powder is used as the material for carrying out non-equilibrium grinding in a high-energy ball mill, wherein the grinding body is GCr15 bearing steel ball during the ball-milling process, the mass ratio of the steel ball to the expanded graphite is (4:1)-(10:1), the rotation speed of the ball mill is 100 revolutions / minute-160 revolutions / minute, and the ball-milling time is 15 hours. In order to prevent the expanded graphite from being condensed during the ball-milling time, propyl alcohol is used as the ball-milling medium. The preparation of the lubricating agent is as follows: adding 2%-7% (in mass fraction) of expanded graphite lubricating agent powder in SJ15W-40 lubricating oil to prepare the lubricating agent. The adding material is added in the lubricating oil, so that excellent antifriction wear-resistant performances are shown in a wider temperature range.
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Description

technical field

[0001] The invention relates to a preparation method of an expanded graphite lubricating oil agent. Added to lubricating oil, this material exhibits excellent anti-friction and anti-wear properties in a wide temperature range, and can effectively prolong the service life of friction pairs. Background technique

[0002] Wear is one of the three main forms of material failure. Friction consumes a large amount of energy. It is reported that 50%-70% of the world's primary energy consumption is related to friction. 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. Due to the characteristics of large specific surface area, high diffusivity and low melting point, nano powder materials can significantly improve the friction and wear performance of friction pairs when used as special lubricating oil additives. Carbon materials represented by graphite are widely us...

Examples

Embodiment Construction

[0013] Preparation of expanded graphite worms: Under laboratory conditions, chemical methods were used to prepare expanded graphite. Wherein, the raw material used is fine natural flake graphite with a particle size of 2000 meshes (purity: 99.9%, place of origin: Tonghua Far East Mining Co., Ltd.), the intercalation agent is concentrated sulfuric acid with a concentration of 98%, and the oxidizing agent is hydrogen peroxide with a concentration of 30%. Intercalation treatment at room temperature of about 25°C for 10 minutes, then washing the intercalated product with water to a pH value of 11, then drying at 1250°C for 0.5 hour, and performing high-temperature puffing treatment at 1200°C. An expanded graphite worm with an expansion factor of about 135 times was obtained.

[0014] Preparation of expanded graphite powder: place expanded graphite worms with an expansion factor of about 135 times in a propanol solvent, and stir them for about 15 minutes at a constant temperature a...