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Nanosilicon dioxide and nano-graphite composite self-repairing lubricating additive and preparation method thereof

A technology of nano-silica and lubricating additives, applied in the field of lubricating additives, can solve the problems of abrasive wear, high load and flash temperature, and the friction coefficient is difficult to reduce very low, so as to achieve ease of use, prolong service life, and raw materials wide-ranging effect

Inactive Publication Date: 2013-10-02
三亚哈尔滨工程大学南海创新发展基地
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, an ore powder additive with magnesium hydroxysilicate as the main component can repair the film thickness up to 0.1mm, but its working conditions require high load and flash temperature
It is difficult to reduce the friction coefficient of the current additives mainly composed of silica, which may be due to the new abrasive wear caused by the harder and larger silica particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0019] (1) Grinding nano-silica powder and nano-graphite powder to the feed precision required by the ball mill;

[0020] (2) A mixed powder composed of nano-silica powder and nano-graphite powder, in which the mass fraction of silica is 95%-97%, graphite is 3%-5%, and then the mass fraction of the mixed powder is 5% %-10% lanthanum chloride powder;

[0021] (3) Dilute 5% oleic acid and Span 80 (sorbitan fatty acid ester) of the mixed powder of the three in base oil, and then mix the mixed powder with oleic acid and Span 80 The base oil was added into a planetary ball mill, and ball milled for 2 hours at a speed of 300 rpm to obtain a composite self-repairing lubricating additive of nano-silica and nano-graphite.

[0022] The lubricating additive obtained in this embodiment has a more excellent anti-friction effect, and can effectively increase the maximum non-seizing load of mechanical equipment.

specific Embodiment approach 2

[0023] (1) Grinding nano-silica powder and nano-graphite powder to the feed precision required by the ball mill;

[0024] (2) A mixed powder composed of nano-silica powder and nano-graphite powder, in which the mass fraction of silica is 97%, graphite is 3%, and then 5%-10% of the mass of the mixed powder is added with chlorine Lanthanum chloride powder;

[0025] (3) Dilute 5% oleic acid and Span 80 (sorbitan fatty acid ester) of the mixed powder of the three in base oil, and then mix the mixed powder with oleic acid and Span 80 The base oil was added into a planetary ball mill, and ball milled for 2 hours at a speed of 300 rpm to obtain a composite self-repairing lubricating additive of nano-silica and nano-graphite.

[0026] The lubricating additive obtained in this embodiment is easier to form a repair layer, and the adhesion ability of the repair layer is better than that of the first embodiment.

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Abstract

The invention provides a nanosilicon dioxide and nano-graphite composite self-repairing lubricating additive and a preparation method thereof. The method comprises steps of: mixing a nanosilicon dioxide powder and a nano-graphite powder to obtain a mixed powder containing 95-99 wt% of silica and 1-5wt% of graphite; adding a lanthanum chloride powder accounting for 5-10 wt% of the mixed powder; diluting oleic acid and sorbitan fatty acid ester respectively accounting for 5wt% of the mixture of the mixed powder and the lanthanum chloride powder in base oil; then adding the mixed powder and base oil containing oleic acid and the Span 80 to a planetary ball mill; and conducting ball milling for 2 h at a rotary speed of 300 rpm to obtain the nanosilicon dioxide and nano-graphite composite self-repairing lubricating additive. According to the invention, nanosilicon dioxide and nano-graphite are compounded, rare earth elements are employed to to promote the reaction and accelerate the penetration, and utilizes friction chemical reaction to realize the goal of strengthening and repairing the friction surface material.

Description

technical field [0001] The invention relates to a lubricating additive, and also relates to a preparation method of the lubricating additive. Specifically, it is a lubricating additive capable of self-repairing effect and a preparation method thereof. Background technique [0002] The types of existing lubricant additives can be roughly divided into three aspects: 1. Metal nano self-healing additives: such as oil-soluble nano-copper and nano-sized zinc powder, tin powder, etc. 2. Inorganic compound nano self-healing additives: such as magnesium oxide, copper oxide, silicon nitride, etc. 3. Mineral powder self-healing additives: currently mainly refer to serpentine (magnesium hydroxysilicate) and palygorskite (aluminum hydroxysilicate). [0003] They are characterized by forming a protective layer on the surface of the metal friction pair to block the direct contact of the friction pair material and greatly reduce the friction coefficient. And in the case of parts not bein...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/26C10N30/06
Inventor 李立全夏特王进礼金国崔秀芳刘二宝刘少刚张永锐
Owner 三亚哈尔滨工程大学南海创新发展基地