Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing multi-layer graphene

A multi-layer graphene, graphite technology, applied in graphene, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of uneven graphene sheet diameter and layer thickness, etc.

Inactive Publication Date: 2019-09-17
ZHONGSU NEW TECH CO LTD
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diameter and layer thickness of the graphene prepared by this method are not uniform

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
  • Method for preparing multi-layer graphene
  • Method for preparing multi-layer graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 100 parts by weight of natural flake graphite (fixed carbon content>99.9%, scale size is 15-40 μm, water content<0.3%), 2 parts by weight of potassium chloride, 1 part by weight of cetyltrimethylammonium bromide are dissolved In 20 parts by weight of deionized water, a mixed solution was formed. The mixed solution was heated to 120° C., and reacted for 1 h under the condition of stirring (500 rpm) and ultrasonic (40 kHz frequency, 4 kW power), and the reaction product was filtered and dried to obtain intercalation-modified graphite.

[0051] Add 100 parts by weight of intercalated modified graphite and 20 parts by weight of polyethylene oxide to the feed port of a twin-screw extruder (set temperature at 120-160° C., rotating speed at 300 rpm), and mix evenly. Then inject into a single-screw extruder (setting temperature is 80-120° C., rotating speed is 60 rpm, head pressure is 10 MPa), and inject supercritical carbon dioxide into the single-screw extruder to obtain foam...

Embodiment 2

[0054] 100 parts by weight of expandable graphite (fixed carbon content > 99.5, sheet diameter size of 150-200 μm, moisture content < 0.2%), 2 parts by weight of potassium chloride, and 1 part by weight of cetyltrimethylammonium bromide were dissolved In 20 parts by weight of deionized water, a mixed solution was formed. The mixed solution was heated to 120° C., and reacted for 1 h under the condition of stirring (500 rpm) and ultrasonic (40 kHz frequency, 4 kW power), and the reaction product was filtered and dried to obtain intercalation-modified graphite.

[0055] Add 100 parts by weight of intercalated modified graphite and 20 parts by weight of thermoplastic starch into the feed port of a twin-screw extruder (set temperature at 120-160° C., rotating speed at 300 rpm), and mix evenly. Then inject into a single-screw extruder (setting temperature is 80-120° C., rotating speed is 60 rpm, head pressure is 15 MPa), and inject supercritical carbon dioxide into the single-screw ...

Embodiment 3

[0058] 100 parts by weight of expandable graphite (fixed carbon content > 99.5, sheet diameter size of 150-200 μm, moisture content < 0.2%), 2 parts by weight of potassium chloride, and 1 part by weight of cetyltrimethylammonium bromide were dissolved In 20 parts by weight of deionized water, a mixed solution was formed. The mixed solution was heated to 120° C., and reacted for 1 h under the condition of stirring (500 rpm) and ultrasonic (40 kHz frequency, 4 kW power), and the reaction product was filtered and dried to obtain intercalation-modified graphite.

[0059] Add 100 parts by weight of intercalated modified graphite and 20 parts by weight of polyethylene oxide to the feed port of a twin-screw extruder (set temperature at 120-160° C., rotating speed at 500 rpm), and mix evenly. Then inject into a single-screw extruder (setting temperature is 80-120°C, rotating speed is 120rpm, head pressure is 20MPa), and inject supercritical carbon dioxide into the single-screw extrude...

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
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing multi-layer graphene. The method comprises the following steps: (1) preparing a mixed solution with graphite, an intercalator and a surfactant so as to obtain intercalation modified graphite; (2) uniformly mixing the intercalation modified graphite with a water-soluble thermoplastic polymer in a double-screw extruder, injecting the mixture into a single-screw extruder, and injecting a supercutical fluid into the single-screw extruder so as to obtain a foamed expanded material; and (3) carrying out ultrasonic treatment on the foamed expanded material, thereby obtaining the multi-layer graphene. The multi-layer graphene prepared by using the method is high in uniformity of both sheet diameters and layer thicknesses.

Description

technical field [0001] The invention relates to a preparation method of multilayer graphene. Background technique [0002] Graphene is a carbon atom with sp 2 The hybrid orbitals form a hexagonal two-dimensional carbon nanomaterial with a honeycomb lattice, which has excellent optical, electrical and mechanical properties. Graphene has important application prospects in materials science, micro-nano processing, energy, biomedicine, and drug delivery, and is considered to be a revolutionary material in the future. [0003] CN105329886A discloses a method for exfoliating graphene by composite shear stress of a vibrating screw extruder: (1) adding graphite and an intercalation agent to water, dispersing, and then rinsing with deionized water to obtain a graphene filter cake; (2) ) disperse and mix the dried graphite filter cake with stearate and stripping agent; (3) send the mixture obtained in step (2) into a vibrating screw extruder, and the setting temperature of the vibra...

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 Applications(China)
IPC IPC(8): C01B32/19B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/19C01B2204/22C01B2204/32
Inventor 童裳慧
Owner ZHONGSU NEW TECH CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com