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Graphene-ceramic microsphere anti-wear additive for lubricating oil and preparation method thereof

A technology of ceramic microspheres and graphene, which is applied in the field of lubricating oil additives, can solve problems such as wear, nano-ceramic microspheres cannot effectively repair wear, and graphene shedding, etc., and achieve the effect of low friction coefficient and good micro-bearing rolling effect

Inactive Publication Date: 2020-07-17
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] When graphene and nano-ceramic microspheres currently used are used as lubricating oil additives, due to the poor coating of graphene and ceramic microspheres, the graphene falls off, causing the hard ceramic balls to directly contact with mechanical parts, causing wear problems, and at the same time Nano-ceramic microspheres cannot effectively repair wear defects

Method used

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  • Graphene-ceramic microsphere anti-wear additive for lubricating oil and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) First, add nano ceramic microspheres, graphene oxide, and dispersant to aluminum hydroxide colloid to disperse uniformly, so that the graphene oxide and aluminum hydroxide colloid solution fully coat the ceramic microspheres, and then use a homogenizer to disperse to obtain Dispersion liquid; Nano ceramic microspheres are Zr-N nano ceramic microspheres with an average particle size of 50nm; dispersant is dialkyl dithiophosphoric acid; the mass concentration of aluminum hydroxide colloid is 9.2%; the working pressure of the homogenizer 2.3MPa, flow rate is 380L / h;

[0033] The ratio of each raw material is, by weight, 17 parts of nano ceramic microspheres, 2.2 parts of graphene oxide, 0.3 parts of dispersant, and 88 parts of aluminum hydroxide colloid;

[0034] (2) The dispersion obtained in step (1) is first spray-dried with high pressure and heating, and then collected to obtain pretreated particles; the spray-drying pressure is 1.6MPa, and the heating temperature is 29...

Embodiment 2

[0040] (1) First, add nano ceramic microspheres, graphene oxide, and dispersant to aluminum hydroxide colloid to disperse uniformly, so that the graphene oxide and aluminum hydroxide colloid solution fully coat the ceramic microspheres, and then use a homogenizer to disperse to obtain Dispersion; Nano ceramic microspheres are Zn-N nano ceramic microspheres with an average particle size of 30nm; dispersant is dialkyl dithiophosphoric acid; the mass concentration of aluminum hydroxide colloid is 8.5%; the working pressure of the homogenizer 2.0MPa, the flow rate is 450L / h;

[0041] The proportion of each raw material is, in parts by weight, 17 parts of nano ceramic microspheres, 1.5 parts of graphene oxide, 0.2 parts of dispersant, and 95 parts of aluminum hydroxide colloid;

[0042] (2) The dispersion obtained in step (1) is spray-dried with high pressure and heating, and then collected to obtain pretreated particles; the spray-drying pressure is 1.2MPa, and the heating temperature ...

Embodiment 3

[0048] (1) First, add nano ceramic microspheres, graphene oxide, and dispersant to aluminum hydroxide colloid to disperse uniformly, so that the graphene oxide and aluminum hydroxide colloid solution fully coat the ceramic microspheres, and then use a homogenizer to disperse to obtain Dispersion liquid; nano-ceramic microspheres are Zr-N nano-ceramic microspheres with an average particle size of 90nm; dispersant is dialkyldithiophosphoric acid; the mass concentration of aluminum hydroxide colloid is 9.5%; the working pressure of the homogenizer 2.5MPa, the flow rate is 350L / h;

[0049] The proportion of each raw material is, in parts by weight, 22 parts of nano ceramic microspheres, 2.5 parts of graphene oxide, 0.4 parts of dispersant, and 85 parts of aluminum hydroxide colloid;

[0050] (2) First, spray-dry the dispersion prepared in step (1) with high pressure and heating, and then collect it to obtain pretreated particles; the pressure of spray drying is 1.8MPa, and the heating ...

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Abstract

The invention relates to the field of lubricating oil additives, and discloses a graphene-ceramic microsphere anti-wear additive for lubricating oil and a preparation method thereof. The preparation method comprises the following steps: (1) adding nano ceramic microspheres, graphene oxide and a dispersing agent into aluminum hydroxide colloid, uniformly dispersing, and dispersing by using a homogenizer to obtain a dispersion liquid, (2) carrying out spray drying on the dispersion liquid to obtain pretreated particles, (3) putting the pretreated particles into a hydrazine hydrate solution, carrying out ultrasonic oscillation treatment, and filtering and drying to obtain compound microspheres, and (4) mixing and grinding the composite microspheres and fatty acid to obtain the graphene-ceramic microsphere anti-wear additive for lubricating oil. The prepared anti-wear additive is used for lubricating oil, on one hand, a good micro-bearing rolling effect is generated, and the friction coefficient is low, and on the other hand, the coating layer graphene nanoplatelets of the nano ceramic microspheres can be partially ground and stripped to be separated from the single graphene sheet under a high load, so that the worn microdefects can be quickly repaired, and the wear resistance of the lubricating oil is improved.

Description

Technical field [0001] The invention relates to the field of lubricant additives, and discloses a graphene-ceramic microsphere anti-wear additive for lubricants and a preparation method thereof. Background technique [0002] Lubricating grease is a kind of lubricating oil that is separated from petroleum and synthesized through hydrogenation, sulfonation, solvent extraction separation methods, etc. It is mainly used to reduce the friction between the surfaces of moving parts, while cooling and sealing machinery and equipment. With the development of high-performance equipment, the requirements for precision lubrication such as industrial machinery lubrication and transmission lubrication are getting higher and higher. Simply using lubricating oil, its lubricating effect is still difficult to meet the requirements of many applications, therefore, additives are usually added to lubricating oil to improve the lubricating performance and anti-wear performance of the lubricating oil. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M159/00B01J13/02B82Y30/00B82Y40/00C10N30/06
CPCB01J13/02B82Y30/00B82Y40/00C10M159/00
Inventor 陈庆曾军堂张俊陈涛
Owner CHENDU NEW KELI CHEM SCI CO LTD
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