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

Preparation method of graphene dispersion liquid

A graphene dispersion liquid and graphene technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of complex preparation process, limited application, easy agglomeration, etc., and achieve good dispersion effect

Inactive Publication Date: 2014-01-08
LUXI GRP
View PDF2 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, graphene materials need to be dispersed in water and various solvents, but there is van der Waals force between layers of graphene materials, so it is easy to agglomerate and difficult to disperse in various solvents, which greatly limits its application.
People also use various polymers to modify graphene, such as block polymers, polyaniline, cellulose, etc., which protect the structure of graphene and improve its dispersion and stability, but these polymers are relatively expensive. The preparation process is complicated, and the amount of coated graphene is small and the stability is poor, so it is difficult to realize industrialization

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
  • Preparation method of graphene dispersion liquid
  • Preparation method of graphene dispersion liquid
  • Preparation method of graphene dispersion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Weigh 10g of graphene oxide prepared by the Hummers method and disperse it into 1000g of distilled water, disperse evenly through mechanical stirring and ultrasonic oscillation, and perform centrifugation with a centrifuge to obtain a graphene oxide dispersion;

[0021] (2) Add the graphene oxide dispersion obtained in (1) into a high-pressure spray tank, pressurize the graphene oxide dispersion into a liquid nitrogen container, and perform quick freezing at minus 80°C to obtain a graphene oxide dispersion quick-frozen products;

[0022] (3) Weigh 4.5kg of methanol and put it into a 10L reactor, add the quick-frozen product of graphene oxide dispersion to it, and let the system rise to room temperature naturally;

[0023] (4) Add acetic acid to the system of (3) above to adjust the pH of the solution to 4.15;

[0024] (5) Add a total of 5 g of sodium borohydride to the above (4) system at 0.5 g each time, immediately raise the temperature of the system to 60 ° C, a...

Embodiment 2

[0028] (1) Weigh 10g of graphene oxide prepared by the Hummers method and disperse it into 1000g of distilled water, disperse evenly through mechanical stirring and ultrasonic oscillation, and perform centrifugation with a centrifuge to obtain a graphene oxide dispersion;

[0029] (2) Add the graphene dispersion obtained in (1) into a high-pressure spray tank, spray the graphene oxide dispersion into a liquid nitrogen container under pressure, and perform quick-freezing treatment at minus 80°C to obtain a quick-frozen graphene oxide dispersion product;

[0030] (3) Weigh 6.5kg of distilled water and put it into a 10L reaction kettle, add the quick-frozen product of graphene oxide dispersion to it, and let the system rise to room temperature naturally;

[0031] (4) Add potassium hydroxide to the above (3) system to adjust the pH of the solution to 8.31;

[0032] (5) Add a total of 8 g of sodium borohydride to the above (4) system at 0.3 g each time, immediately raise the tempe...

Embodiment 3

[0036] (1) Weigh 10g of graphene oxide prepared by the Hummers method and disperse it in 800g of methanol, disperse evenly through mechanical stirring and ultrasonic oscillation, and perform centrifugation with a centrifuge to obtain a graphene oxide dispersion;

[0037] (2) Add the graphene dispersion obtained in (1) into a high-pressure spray tank, spray the graphene oxide dispersion into a liquid nitrogen container under pressure, and perform quick-freezing treatment at minus 80°C to obtain a quick-frozen graphene oxide dispersion product;

[0038] (3) Weigh 4.5kg of methanol and put it into a 10L reactor, add the quick-frozen product of graphene oxide dispersion to it, and let the system rise to room temperature naturally;

[0039] (4) Add potassium hydroxide to the system of (3) above to adjust the pH of the solution to 10.31;

[0040] (5) Add a total of 15 g of sodium borohydride to the above (4) system at 0.5 g each time, immediately raise the temperature of the system...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of a graphene dispersion liquid. The preparation method comprises the following steps: (1) dispersing graphene oxide into a solvent A to obtain a graphene oxide dispersion liquid; (2) spraying the graphene oxide dispersion liquid into a liquid nitrogen container and carrying out quick freezing treatment to obtain a quickly frozen product of the graphene oxide dispersion liquid; (3) adding the quickly frozen product of the graphene oxide dispersion liquid to a reaction kettle with a solvent B so that the temperature of the system naturally rises to the room temperature; (4) adding an acidity regulator to the system to regulate the pH to the range from 4.00 to 11.00 at the room temperature; (5) adding a reducing agent to the system for solid-liquid separation to obtain a solid material; and (6) adding the solid material to a solvent C to obtain the graphene dispersion liquid. The preparation method of the graphene dispersion liquid, disclosed by the invention has the beneficial effects that the obtained graphene dispersion liquid is black thick slurry, high in electrical conductivity, excellent in heat stability and easy to disperse, and the graphene exists completely as a single-layer sheet structure. The preparation method of the graphene dispersion liquid, disclosed by the invention, is simple to operate, high in yield, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of graphene preparation, in particular to a method for preparing a graphene dispersion. Background technique [0002] Graphene's unique two-dimensional crystal structure has a very high electron transfer rate and the highest mechanical strength. At the same time, its chemical properties are stable, transparent, and thermal conductivity is excellent, so it has broad application prospects. In practical applications, graphene materials need to be dispersed in water and various solvents, but there is van der Waals force between layers of graphene materials, so it is easy to agglomerate and difficult to disperse in various solvents, which greatly limits its application. People also use various polymers to modify graphene, such as block polymers, polyaniline, cellulose, etc., while protecting the graphene structure, it improves its dispersion and stability, but these polymers are relatively expensive. The preparation proce...

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
IPC IPC(8): C01B31/04C01B32/194
Inventor 张文史振国曹全福
Owner LUXI GRP
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