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

Graphene dispersion liquid and preparation method thereof

A graphene dispersion liquid and graphene technology, which is applied in the treatment of dyed low-molecular organic compounds, dyed high-molecular organic compounds, and fibrous fillers. problem, to achieve the effect of improving dispersion, easy purchase, and cheap price

Inactive Publication Date: 2014-04-16
TORAY ADVANCED MATERIALS RES LAB CHINA
View PDF2 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, graphene is usually dispersed by directly adding a dispersant. The dispersant used, such as sodium dodecylbenzenesulfonate, polyvinylpyrrolidone, etc., has a poor dispersion effect, and the dispersed graphene has poor stability. and affect its electrical conductivity

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
  • Graphene dispersion liquid and preparation method thereof
  • Graphene dispersion liquid and preparation method thereof
  • Graphene dispersion liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The preparation method of graphene:

[0042](1) Preparation of graphite oxide: raw material is 1500 mesh natural graphite powder (Shanghai Yifan Graphite Co., Ltd.), 220ml of 98% concentrated sulfuric acid, 3.5g sodium nitrate, 21g potassium permanganate; above-mentioned substances are added to 10g natural stone In the ink powder, the mixture was stirred in an ice bath for 1 hour, and the temperature of the mixture was controlled at 20°C or below. The above mixed solution was taken out, and reacted for 4 hours while stirring in a 35° C. water bath; after adding 500 ml of deionized water, the resulting suspension was reacted at 90° C. for 15 minutes. Finally, 600ml of deionized water and 50ml of hydrogen peroxide were added and reacted for 5 minutes to obtain a graphene oxide dispersion. Filtrate the obtained dispersion while hot, wash out the metal ions with dilute hydrochloric acid solution, wash with deionized water to remove the acid, repeat the washing until the pH...

Embodiment 1

[0044] Under the condition of 25° C., 40 mg of graphene powder and 40 g of N-methylpyrrolidone (NMP) were fully mixed, and then 10 mg of polyoxyethylene castor oil was added and mixed evenly.

[0045] The dispersion liquid can be dispersed stably for more than a week. The sheet resistivity is shown in Table 1.

Embodiment 2

[0047] Under the condition of 25° C., 4 mg of graphene powder and 400 g of N-methylpyrrolidone (NMP) were fully mixed, and then 1 mg of polyoxyethylene castor oil was added, and mixed evenly.

[0048] The dispersion liquid can be dispersed stably for more than a week. The sheet resistivity is shown in Table 1.

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 relates to a graphene dispersion liquid and a preparation method thereof. The graphene dispersion liquid comprises graphene, a dispersant and a solvent. The dispersant is polyoxyethylated castor oil. Through use of the dispersant in graphene, the graphene dispersion liquid having good dispersibility is prepared. The graphene dispersion liquid has good electrical conductivity and can be used in fields of conductive materials, anti-static materials, electromagnetic shielding materials of electronic products, electrode materials of lithium ion batteries, and microwave absorption materials.

Description

technical field [0001] The invention belongs to the field of nano-graphite materials, and in particular relates to a stably dispersed graphene dispersion liquid and a preparation method thereof. Background technique [0002] Graphene is another new type of carbon nanomaterial after the discovery of carbon nanotubes. Since its discovery in 2004, graphene has been a research hotspot. It consists of a single layer of carbon atoms and has excellent mechanical, electrical, thermal and optical properties. It is used in battery materials, energy storage materials, electronic devices, composite materials and other fields. It has broad application prospects. [0003] However, how to maintain the effective dispersion of graphene during application is also an urgent problem to be solved. Due to the inert state of the surface of the graphene material, high chemical stability, weak interaction with other media, and strong van der Waals force between graphite flakes, it is easy to aggre...

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): C09C1/46C09C3/10C09C3/08
Inventor 周元元杜宁孙培育吴刚
Owner TORAY ADVANCED MATERIALS RES LAB CHINA
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