Device for preparing graphene by dry grinding and stripping with and method for production graphene

A dry grinding and production method technology, applied in the field of graphene, can solve problems such as graphene lattice defects, reduce graphene size, and graphite lattice damage, achieve easy large-scale production, prevent aggregation and reduce structural damage. Effect

Active Publication Date: 2017-05-31
苏州中野桑拿设备有限公司
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, although graphene is obtained through repeated mechanical grinding, due to the effect of grinding compressive stress, the grinding impact will cause certain damage to the graphite lattice, and due to the pressure exerted on graphite by grinding, it will cause huge damage to the exfoliated graphite. Impact force, this impact force will cause structural defects in the graphene layer, which can easily cause lattice defects in the graphene layer structure, reduce the size of the graphene after stripping, and make the obtained graphene product crystal size small
In addition, the current grinding and production of graphene is intermittent. While exfoliating graphite, the exfoliated graphene cannot be screened out in time, so it is difficult to carry out continuous and stable mass production. At the same time, the conventional grinding and exfoliating method mainly refers to graphite Grinding in the grinder, the friction force generated by the pressure will shear the graphite, which will easily cause structural defects in the graphene and reduce the size of the graphene after peeling, so that the edge of the obtained product will have "burrs" and the crystal size is small. The application of its graphene is limited, unable to develop large-scale production and its application
[0005] In summary, the current mechanical exfoliation preparation is easy to cause lattice defects on graphene, which cannot be mass-produced, and the exfoliation preparation efficiency is low and the cost is high, thus affecting the market application 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
  • Device for preparing graphene by dry grinding and stripping with and method for production graphene
  • Device for preparing graphene by dry grinding and stripping with and method for production graphene
  • Device for preparing graphene by dry grinding and stripping with and method for production graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A device for preparing graphene by dry grinding and stripping, such as figure 1 As shown, it includes drive device (1), disc rolling device (2), tandem disc extruder (3), swirl disperser (4), product collector (5), and the disc The rolling device (2) consists of a main shaft (6), an upper plate (7), an upper liner (8), and a bearing (9); a lower liner (10), a lower plate (11), and a bearing (12). In order to gradually shear and peel off graphite to form sheet-type orientation, slide between layers, and use subsequent deep peeling to prepare graphene, its disc rolling device is provided with a feeding port; wherein the disc rolling device (2 The grinding roller in ) consists of front end cover (13), roller sleeve (14), self-aligning roller bearing (15), flat key (16), roller body (17), spacer sleeve (18), cylindrical roller bearing (19 ), the rear end cover (20), the oil hole bolt (21), the oil seal (22), and the roller shaft (23). Shearing and exfoliating graphite, th...

Embodiment 2

[0036] The present embodiment provides a kind of production method of graphene, and it is the method that adopts the preparation device of the graphene of embodiment 1 to carry out production, and this method comprises the following steps;

[0037] (1) Put graphite and stripping agent into the disc-type rolling device, grind and strip the graphite step by step through the relative movement of the grinding roller and the grinding disc to obtain graphene coarse material, the rotation speed is 500 rpm; the stripping agent is urea, sodium cholate, P-benzenesulfonamide is prepared according to the mass ratio of 1:2:1

[0038] (2) Pass the graphene coarse material obtained in step (1) through a tandem grinding disc extruder, and use the strong shear force generated by the relatively high-speed movement of the dynamic and static grinding discs, dragging shear and exchange to make the graphite layers slide, Graphene is obtained by exfoliating layer by layer at different stages, and th...

Embodiment 3

[0042] The present embodiment provides a kind of production method of graphene, and it is the method that adopts the preparation device of the graphene of embodiment 1 to carry out production, and this method comprises the following steps;

[0043] (1) Put graphite and stripping agent into the disc-type rolling device, grind and strip the graphite step by step through the relative movement of the grinding roller and the grinding disc to obtain graphene coarse material, the rotation speed is 2000 rpm; the stripping agent is urea, sodium cholate, P-benzenesulfonamide is prepared according to the mass ratio of 1:5:3

[0044] (2) Pass the graphene coarse material obtained in step (1) through a tandem grinding disc extruder, and use the strong shear force generated by the relatively high-speed movement of the dynamic and static grinding discs, dragging shear and exchange to make the graphite layers slide, Graphene is obtained by exfoliating layer by layer at different stages, and the...

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 belongs to the technical field of graphene and provides a device for preparing the graphene by dry grinding and stripping. The device is characterized by comprising a driving unit, a disc rolling unit, a serial disc extruder, a cyclone disperser and a product collector, the disc rolling unit is provided with a grinding disc and a grinding roller, and the serial disc extruder is provided with a fixed disc and a moving disc which are combined dynamically and statically. The primary graphene is prepared by gradual shearing and striping with the disc rolling unit, and the graphene product is obtained by further shearing and stripping with the serial disc extruder. The graphene is prepared by continuous and stable stripping under the dry condition, production efficiency is high, and large-scale production of the graphene is easily realized.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a device for preparing graphene by dry grinding and stripping and a method for producing graphene. 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 currently the thinnest and hardest nanomaterial. It also has properties that many ordinary materials do not possess, such as good light transmission, high thermal conductivity, high electron mobility, low resistivity, and high mechanical strength. This special property makes Graphene has great application value in many fields such as touch screen, sensor, super capacitor, lithium battery, fast charging, solar battery, hydrogen storage, heat dissipation of electronic components, material reinforcement, anti-corrosion coating, biomedicine, s...

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): C01B32/19B02C21/00B02C15/00B02C7/06
CPCB02C7/06B02C15/00B02C21/00C01B2204/04
Inventor 陈庆曾军堂陈兵
Owner 苏州中野桑拿设备有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap