Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for preparing graphene with high lubricity using ionic liquid

A technology of ionic liquid and lubricating performance, applied in lubricating compositions, petroleum industry, etc., can solve problems such as easy agglomeration, difficult dispersion of graphene, poor lubricating performance, etc., achieve excellent lubricating performance, low equipment requirements, and easy preparation process The effect of green environmental protection

Active Publication Date: 2021-06-15
SOUTHWEST JIAOTONG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the application problems that graphene is difficult to disperse, easy to agglomerate, and poor lubricating performance in water-based lubrication systems, this invention proposes to use a type of ionic liquid with coupling agent function, and after simple stirring treatment, functionalized Few-layer graphene, the dispersibility and stability of in-situ modified graphene in water far exceeds that of graphene oxide, and exhibits excellent anti-friction and anti-wear properties, and is expected to become a new generation of high-performance water-based lubricant additives

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 method for preparing graphene with high lubricity using ionic liquid
  • A method for preparing graphene with high lubricity using ionic liquid
  • A method for preparing graphene with high lubricity using ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 2g of natural flake graphite powder and 1g of sodium nitrate in a three-necked flask, place it in an ice bath, add 46ml of concentrated sulfuric acid under stirring conditions, and slowly add 6g of potassium permanganate after completion, and stir for 3h under an ice bath. After low-temperature reaction, the temperature was raised to 35° C. and stirred for 1 h, and then 92 ml of deionized water was added and the temperature was raised to 90° C. for high-temperature reaction for 3 h. Finally, 150ml of deionized water and 10ml of 30% hydrogen peroxide were added, and the color of the liquid turned yellow, indicating that graphite oxide was successfully prepared. Then use 5% dilute hydrochloric acid and deionized water to wash by centrifugation at 8000r / min for 5min until it is neutral and free of sulfate ions, and then the graphene oxide is made into an aqueous solution and placed in a beaker. Transmission electron microscope pictures of graphene oxide as Figure 1a...

Embodiment 2

[0037] Weigh 2g of natural flake graphite powder and 1g of sodium nitrate in a three-necked flask, place it in an ice bath, add 46ml of concentrated sulfuric acid under stirring conditions, and slowly add 6g of potassium permanganate after completion, and stir for 3h under an ice bath. After the reaction at low temperature, the temperature was raised to 35° C. and stirred for 1 h, and then 92 ml of deionized water was added and the temperature was raised to 90° C. for high temperature reaction for 3 h. Finally, 150ml of deionized water and 10ml of 30% hydrogen peroxide were added, and the color of the liquid turned yellow, indicating that graphite oxide was successfully prepared. Then use 5% dilute hydrochloric acid and deionized water to wash by centrifugation at 8000r / min for 5min until it is neutral and free of sulfate ions, and then the graphene oxide is made into an aqueous solution and placed in a beaker.

[0038] Dilute the graphene oxide aqueous solution prepared above...

Embodiment 3

[0041] Weigh 2g of natural flake graphite powder and 1g of sodium nitrate in a three-necked flask, place it in an ice bath, add 46ml of concentrated sulfuric acid under stirring conditions, and slowly add 6g of potassium permanganate after completion, and stir for 3h under an ice bath. After low-temperature reaction, the temperature was raised to 35° C. and stirred for 1 h, and then 92 ml of deionized water was added and the temperature was raised to 90° C. for high-temperature reaction for 3 h. Finally, 150ml of deionized water and 10ml of 30% hydrogen peroxide were added, and the color of the liquid turned yellow, indicating that graphite oxide was successfully prepared. Then use 5% dilute hydrochloric acid and deionized water to wash by centrifugation at 8000r / min for 5min until it is neutral and free of sulfate ions, and then the graphene oxide is made into an aqueous solution and placed in a beaker.

[0042] Dilute the graphene oxide aqueous solution prepared above to 3mg...

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
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing graphene with high lubricating properties by using ionic liquid. Natural flake graphite powder is used as raw material, concentrated sulfuric acid and potassium permanganate are used as oxidant and intercalation agent to obtain multilayer graphene oxide. After cleaning Make an aqueous solution and place it in a container for dilution, add an ionic liquid coupling agent, stir, adjust the pH value to alkaline, and ultrasonically treat until a uniform dark yellow transparent liquid is obtained; stir in an oil bath to make it fully react; Wash to obtain black functionalized graphene dispersion. The method used in the invention has simple operation, low equipment requirements, and the preparation process is green and environmentally friendly, and the prepared functionalized graphene has excellent lubricating performance, and is expected to become a new generation of high-performance water-based lubricating additives.

Description

technical field [0001] The invention belongs to the field of functionalized graphene lubricating materials, in particular to a method for preparing graphene with high lubricating performance by using ionic liquid. Background technique [0002] Traditional lubricating oil has anti-friction and anti-wear properties, and plays a leading role in the lubrication of various materials and components. However, in some specific cases, its high viscosity will cause the parts to generate a lot of heat during high-speed operation, thereby reducing the thermal stability of the friction pair material; in addition, if the lubricating oil leaks during operation, it will pollute the natural environment. Especially marine machinery, such as ships, warships, etc., the oil leaked directly pollutes the ecological environment of the waters where it is located, and will have a devastating impact on aquatic organisms. The environmental friendliness, good thermal conductivity and fluidity of the wa...

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): C10M173/02C10N30/06
CPCC10M173/02C10M2201/041C10M2215/30C10M2219/04C10N2030/06
Inventor 樊小强甘超亮李文朱旻昊
Owner SOUTHWEST JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com