A kind of preparation method of superstructured graphene-based lubricating grease

An alkenyl grease, super-regular technology, applied in the field of materials, can solve the problems of unfavorable graphene anti-wear and anti-friction properties, uneven sheet quality, and many surface defects, and achieve excellent anti-wear and anti-friction effects, chemical composition The effect of stable and uniform dispersion effect

Active Publication Date: 2022-04-12
TSINGHUA UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems such as uneven sheet quality and many surface defects, which are not conducive to improving the anti-wear and anti-friction properties of graphene.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of superstructured graphene-based lubricating grease
  • A kind of preparation method of superstructured graphene-based lubricating grease
  • A kind of preparation method of superstructured graphene-based lubricating grease

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method of the ultra-regular graphene base lubricating grease that the present invention proposes, comprises the steps:

[0023] (1) In a low-temperature water bath at 3 to 5°C, graphite powder is used as the raw material for preparation, and the graphite powder is oxidized with concentrated sulfuric acid and potassium permanganate. The particle size of the graphite powder is 1000 to 1800 mesh; , the mass ratio of graphite powder, concentrated sulfuric acid and potassium permanganate is: graphite powder: concentrated sulfuric acid: potassium permanganate=1:(30~50):(3~5), and the insulation time length is 20~30 minutes, obtains containing A mixed solution of graphite oxide; the mixed solution is placed in a constant temperature water bath for heat preservation, and electromagnetically stirred;

[0024] (2) Add deionized water to the mixed solution of step (1), the mass ratio of the added deionized water to graphite powder is (120~150): 1, until no bubbles ...

Embodiment 1

[0037] (1) Weigh 5.0g of 1200 mesh commercial graphite powder, and add it very slowly batch by batch to 225.0g of concentrated sulfuric acid liquid in a water bath environment at 4°C. 20.0 g of potassium permanganate solid particles were added, kept in a constant temperature water bath for 30 minutes, and subjected to electromagnetic stirring treatment.

[0038] (2) Add 600.0 g of deionized water to the mixed liquid, keep it warm at 50° C. for 60 minutes, and carry out electromagnetic stirring treatment at the same time. After the heat preservation is finished, slowly add a 30% by weight aqueous hydrogen peroxide solution dropwise until the solution turns golden yellow completely, and then keep heat for 15 minutes.

[0039] (3) Under the condition of electromagnetic stirring, 30 wt % potassium hydroxide aqueous solution was slowly added dropwise to the mixed liquid until the pH value of the mixed liquid was 10, followed by electromagnetic stirring for 40 minutes.

[0040] (4)...

Embodiment 2

[0051] (1) Weigh 5.0g of 1500 mesh commercial graphite powder, and add it very slowly batch by batch to 250.0g of concentrated sulfuric acid liquid in a water bath environment of 4°C. 15.0 g of potassium permanganate solid particles were added, kept in a constant temperature water bath for 30 minutes, and subjected to electromagnetic stirring treatment.

[0052] (2) Add 600.0 g of deionized water to the mixed liquid, keep it warm at 50° C. for 60 minutes, and carry out electromagnetic stirring treatment at the same time. After the heat preservation is finished, slowly add a 30% by weight aqueous hydrogen peroxide solution dropwise until the solution turns golden yellow completely, and then keep heat for 15 minutes.

[0053] (3) Under the condition of electromagnetic stirring, slowly add 35 wt% sodium hydroxide aqueous solution dropwise to the mixed liquid until the pH value of the mixed liquid is 9, and then electromagnetically stir for 40 minutes.

[0054] (4) Suction filtra...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of materials and relates to a preparation method of super-regular graphene-based lubricating grease. In the present invention, concentrated sulfuric acid and potassium permanganate are used as oxidizing agents, mixed with graphite powder; aqueous hydrogen peroxide solution is added dropwise; high-concentration strong alkali solution is added after stirring; Regular graphene sheet powder; ball milling the graphene powder; dissolving the obtained graphene powder and basic grease with an organic solvent respectively, and mixing the two to obtain an emulsion, which is homogenized; heating in a water bath to make the organic solvent completely After evaporation, the grease returns to a semi-solid state; after cooling, it is repeatedly ground to obtain a super-regular graphene-based grease. The invention adopts the method of dissolution-evaporation-macroscopic dispersion-microscopic homogenization to disperse the ultra-regular graphene sheet into the basic grease, which has excellent lubricating effect and can be widely used in engineering machinery, aerospace, passenger vehicles and military equipment etc.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of superregular graphene-based lubricating grease. Background technique [0002] The development of modern mechanical equipment has put forward more and more stringent requirements for improving the service life of equipment, reducing power consumption, and green and sustainable development. Improving the lubrication performance of equipment is the simplest and most effective way to reduce energy consumption and prolong the service life of equipment. Because grease has good high-temperature stability and excellent load-carrying capacity, it has become one of the most widely used lubricating media, especially in severe working conditions such as heavy load, high speed, high temperature and dusty conditions. Zinc dialkyldithiophosphates (ZDDPs) are the most commonly used antiwear and antioxidant additives in conventional lubricants. However, the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C10M125/02C10M177/00C10N30/06
CPCC10M125/02C10M177/00C10M2201/041
Inventor 何永勇金宝陈广炎李玉龙雒建斌
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap