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

Method for continuously preparing graphene material in cut mode through screw machine

A screw machine and graphene technology, applied in the field of graphene materials, can solve problems such as unsustainable and stable large-scale production, small two-dimensional size area, graphite lattice damage, etc., achieve significant market application value, small investment, and low cost Effect

Active Publication Date: 2016-01-27
扬州九海新材料科技有限公司
View PDF8 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects that the current preparation of graphene by mechanical exfoliation such as ball milling and jet milling is easy to cause graphite lattice damage, small two-dimensional size area, long time consumption, high cost, and incapable of continuous and stable large-scale production, the present invention proposes a method that utilizes a screw machine to shear A method for continuously preparing graphene materials, thereby realizing continuous and stable preparation of large-scale graphene, and further promoting the mass production 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
  • Method for continuously preparing graphene material in cut mode through screw machine
  • Method for continuously preparing graphene material in cut mode through screw machine
  • Method for continuously preparing graphene material in cut mode through screw machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Graphite powder with a mass fraction of 85%, etherified starch with a mass fraction of 8%, polyvinyl alcohol with a mass fraction of 4%, glycerin with a mass fraction of 2.5%, and dodecane with a mass fraction of 0.5% Sodium sulfate was mixed and dispersed for 10 minutes at a speed of 800 rpm in a high-speed mixer to obtain a premix;

[0049] (2) Put the premix obtained in step (1) into the main feeding port of the inline co-rotating three-screw machine, and the screw machine is sequentially provided with a dispersion orientation section, a shear carbonization section, a shear In the cutting and peeling section, the temperature of the mixing section is set at 100-200°C, the temperature of the shearing carbon section is set at 300-500°C, and the temperature of the shearing and peeling section is set at 100-300°C. When the screw rotates at a speed of 500rpm, the The section consists of two sets of 56 / 56 conveying thread elements, two sets of toothed discs, four sets o...

Embodiment 2

[0053] (1) Flake graphite with a mass fraction of 40%, highly oriented graphite with a mass fraction of 40%, esterified starch with a mass fraction of 10%, polyvinyl alcohol with a mass fraction of 7.5%, and ethyl alcohol with a mass fraction of 1.5% Glycol, the sodium dodecylbenzene sulfonate that mass fraction is 1% mixes and disperses 15min with the rotating speed of 1000rpm in high-speed mixer, obtains premixture;

[0054] (2) Add the premix obtained in step (1) into the main feeding port of the product-shaped co-rotating three-screw machine, and the screw machine is sequentially provided with a dispersion orientation section, a shear carbonization section, and a shearing section from the feed end to the discharge end. For the cutting and peeling section, the screw machine has an aspect ratio greater than 30 / 1 and a screw diameter of 65mm. The temperature of the mixing section is set at 100-200°C, the temperature of the shearing carbon section is 300-500°C, and the setting ...

Embodiment 3

[0059] (1) The mass fraction is 90% expanded graphite, the mass fraction is 3% pregelatinized starch, the mass fraction is 2% etherified starch, the mass fraction is 3% polyvinyl alcohol, and the mass fraction is 1.5% Pentaerythritol and polyvinylpyrrolidone with a mass fraction of 0.5% were mixed and dispersed for 25 minutes at a speed of 1200 rpm in a high-speed mixer to obtain a premix;

[0060] (2) Put the premix obtained in step (1) into the main feeding port of the co-rotating twin-screw machine, and the screw machine is sequentially equipped with a dispersed orientation section, a shear carbonization section, and a shear peeling section from the feed end to the discharge end , the setting temperature of the mixing section is 100-200°C, the setting temperature of the shearing carbon section is 300-500°C, the setting temperature of the shearing stripping section is 100-300°C, when the screw rotates at a speed of 1000rpm, the dispersion orientation section consists of two ...

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 provides a method for continuously preparing a graphene material in a cut mode through a screw machine. The method includes the steps that a graphite premixture is evenly dispersed in the screw rotating direction through the continuous-rotating same-direction engaging screw machine to form slice-shaped orientation, and cutting and stripping are carried out through the orientation direction of engaged screw elements, wherein stripping is carried out through a same-direction-engaging double-screw machine or a same-direction-engaging three-screw machine or a same-direction-engaging four-screw machine or a same-direction-engaging screw machine with more screws, high shearing stress is generated on interfaces between screws and the engaged screw elements in the same-direction rotating process of the screws, and therefore the large size area graphene is formed. The graphene is prepared in a stripped mode through the screw machine, the surge pressure on graphite layers is small, and cutting and striping are carried out in the direction parallel to the graphite layer faces. Further, continuous carbonizing, reduction, cutting and stripping of carbon raw materials can be achieved in the continuous screw machine, the layer face structure of the graphene is reserved to the maximum degree, the graphene can be continuously and stably prepared, the large-scale mass production of the graphene is further promoted, and remarkable market application value is achieved.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to the preparation of graphene by a mechanical method, in particular to a method for continuously preparing graphene materials by shearing with a screw machine. Background technique [0002] In 2004, two scientists from the University of Manchester in the United Kingdom discovered graphene using the method of micromechanical exfoliation, and won the Nobel Prize in Physics in 2010. Graphene is a single-atom-thick flat plate structure with sp2-bonded carbon atoms. In theory, it has a perfect hexagonal network structure and exhibits excellent electronic stability, thermal conductivity, optical properties, and mechanical properties. Since the discovery of graphene, due to its excellent performance and huge market application prospects, it has triggered a research boom in the fields of physics and material science. Graphene is currently the thinnest and hardest nanomaterial. It also ha...

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): C01B31/04
Inventor 陈庆曾军堂孙丽枝叶任海陈韦坤陈兵廖大应
Owner 扬州九海新材料科技有限公司
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