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Preparation method of graphene-containing lubricant additives and/or lubricating grease additives

A lubricating oil additive, lubricating grease additive technology, applied in the field of fine chemicals, can solve problems such as unsatisfactory work requirements, limited lubricating ability, environmental pollution, etc., to improve anti-wear performance and limit working ability, and increase and reduce comprehensive wear value The effect of production costs

Inactive Publication Date: 2018-04-24
广西清鹿新材料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of lubricating oil additives is very important to improve the performance of lubricating oil. In the current lubricating oil market, traditional lubricating oil is still dominant, but its lubricating ability is limited, and the addition of sulfur, phosphorus, chlorine, etc. in traditional lubricating oil The additives of elements pollute the environment and cannot meet the needs of today's work

Method used

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  • Preparation method of graphene-containing lubricant additives and/or lubricating grease additives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 50g of expandable graphite and put it into a microwave device, and heat the expandable graphite to 2000°C rapidly through high-power microwave until the expandable graphite is completely expanded to obtain graphene microflakes with 20 layers of graphene; the graphene microflakes Disperse in dimethylformamide solution, set the linear speed of the grinding and dispersing machine to 10m / s, fully grind the dimethylformamide solution containing graphene microchips for 0.5h; then grind the suspension after grinding Ultrasonic treatment for 2.0 hours. During ultrasonic treatment, set the power of the ultrasonic disperser to 1000w, while maintaining the temperature of the suspension at 110°C, and then let it stand for 4.0 hours to separate the layers of the suspension after ultrasonic treatment. Take the upper suspension Put the turbid liquid into a centrifuge, centrifuge at 1500r / m for 15min, and separate the upper liquid and the bottom residue; add 2g of polyvinylpyrrolid...

Embodiment 2

[0026] Take 30g of expandable graphite and put it into a microwave device, and heat the expandable graphite to 2150°C rapidly through high-power microwave until the expandable graphite is completely expanded to obtain graphene microflakes with 25 layers of graphene; the graphene microflakes Disperse in dimethylformamide solution, set the linear speed of the grinding and dispersing machine to 11m / s, fully grind the dimethylformamide solution containing graphene microchips for 0.8h; then grind the suspension after grinding Ultrasonic treatment for 2.5 hours. During ultrasonic treatment, set the power of the ultrasonic disperser to 1100w, while maintaining the temperature of the suspension at 114°C, and then let it stand for 4.5 hours to separate the layers of the suspension after ultrasonic treatment. Take the upper suspension Put the turbid liquid into a centrifuge, centrifuge at 1780r / m for 20min, and separate the upper liquid and the bottom residue; add 3g of polyvinylpyrrolid...

Embodiment 3

[0028] Take 100g of expandable graphite and put it into a microwave device, and heat the expandable graphite to 2200°C rapidly through high-power microwave until the expandable graphite is completely expanded to obtain graphene microflakes with 30 layers of graphene; the graphene microflakes Disperse in dimethylformamide solution, set the linear speed of the grinding and dispersing machine to 12m / s, fully grind the dimethylformamide solution containing graphene microflakes for 1.0h; then grind the suspension after grinding Ultrasonic treatment for 2.8 hours. During ultrasonic treatment, set the power of the ultrasonic disperser to 1200w, while maintaining the temperature of the suspension at 120°C, and then let it stand for 5.0 hours to separate the layers of the suspension after ultrasonic treatment. Take the upper suspension Put the turbid liquid into a centrifuge, centrifuge at 1860r / m for 25min, and separate the upper liquid and the bottom residue; add 2.5g of polyvinylpyrr...

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Abstract

The invention provides a preparation method of graphene-containing lubricant additives and / or lubricating grease additives. The preparation method includes the steps: heating expandable graphite by microwaves and expanding the graphite to obtain graphene nano-platelets; dispersing the graphene nano-platelets in organic solvents and sufficiently grinding the organic solvents containing the graphenenano-platelets by a grinding disperser; performing ultrasonic treatment on turbid liquid obtained after grinding, layering the turbid liquid subjected to ultrasonic treatment by standing, centrifuging upper turbid liquid and performing separation to obtain upper liquid and bottom residues; adding polyvinylpyrrolidone or N-methylpyrrolidone into the upper liquid and uniformly mixing the polyvinylpyrrolidone or N-methylpyrrolidone with the upper liquid to obtain the additives. The expandable graphite serves as a raw material for preparing graphene lubricants and has small structure defects, theprepared graphene lubricant additives are good in dispersibility and not easily agglomerated or precipitated after being added into the lubricants, and various comprehensive performances of the lubricants and lubricating grease can be improved.

Description

technical field [0001] The invention belongs to the field of fine chemical industry, and in particular relates to a preparation method of a lubricating oil additive and / or lubricating grease additive containing graphene. Background technique [0002] Lubricating oil and grease are generally composed of base oil and lubricating additives. Among them, the functions of lubricating additives mainly include antioxidants, antiwear agents, friction modifiers, extreme pressure additives, detergents, dispersants, foam inhibitors, anti-corrosion and anti-corrosion agents. Rust agent, pour point improver, viscosity index improver, etc. Lubricating oil and grease additives made of graphene have the following advantages: (1) Excellent high temperature and oxidation resistance stability, extremely long high temperature service life; (2) Excellent extreme pressure anti-wear performance and adhesion (3) Good mechanical stability and chemical stability, water vapor resistance, weak acid and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M161/00C10M141/06C10M177/00C10M125/02C01B32/19C01B32/194C10N30/04C10N30/06C10N30/08C10N30/10C10N50/10
CPCC10M125/02C10M141/06C10M161/00C10M177/00C10M2201/041C10M2215/223C10M2217/028C10N2030/04C10N2030/06C10N2030/08C10N2030/10C10N2030/64C10N2050/10
Inventor 周铭李虓
Owner 广西清鹿新材料科技有限责任公司
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