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Method based on extensional rheology for stripping graphene and application of graphene

A technology of exfoliating graphene and extensional rheology, applied in the field of material processing, can solve the problems of limited exfoliation efficiency of graphene size uniformity, and achieve the effect of avoiding lattice damage

Active Publication Date: 2017-05-31
东港智科产业园有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no particularity in the structure of the stretching equipment in the plan. Sugars are mainly used as bonding and peeling carriers, and the size uniformity and peeling efficiency of the graphene obtained by peeling are limited.

Method used

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  • Method based on extensional rheology for stripping graphene and application of graphene
  • Method based on extensional rheology for stripping graphene and application of graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Mix graphite flake graphite with a particle size of 0.5 mm, glucose and water according to a mass ratio of 1:5:2 and stir evenly to prepare a viscous paste-like graphite mixture;

[0045] (2) Put the paste graphite mixture into the feeding port of the stretching machine, enter the stretching mechanism after adding the feeding mechanism, connect the power transmission mechanism, control the working temperature to 50°C, and set the speed to 500r / min , in the process of continuously passing through the central shaft, the eccentric rotation of the cam rotor during the rotation process periodically compresses and stretches the cavity space, the paste graphite mixture is continuously compressed and stretched, and the During the stretching process, the graphite is stripped into graphene, and the graphene is collected by the collection mechanism.

[0046] like figure 1 shown and figure 2 As shown, the stretching machine includes a barrel 10, and a temperature control de...

Embodiment 2

[0050] (1) Mix and stir the expanded graphite with graphite raw material particle size of 0.3 mm, EVA hot melt adhesive and methanol according to the mass ratio of 1:6:3, and prepare a viscous paste-like graphite mixture;

[0051] (2) Put the paste-like graphite mixture into the feeding port of the stretching machine, enter the stretching mechanism after adding the feeding mechanism, connect the power transmission mechanism, control the working temperature to 60°C, and set the speed to 700r / min , in the process of continuously passing through the central shaft, the eccentric rotation of the cam rotor during the rotation process periodically compresses and stretches the cavity space, the paste graphite mixture is continuously compressed and stretched, and the During the stretching process, the graphite is stripped into graphene, and the graphene is collected by the collection mechanism.

[0052] like figure 1 shown and figure 2 As shown, the stretching machine includes a ba...

Embodiment 3

[0056] (1) Mix and stir the highly oriented graphite with a graphite raw material particle size of 0.2mm, PA hot melt adhesive and n-propanol according to the mass ratio of 1:7:2, and prepare a viscous paste-like graphite mixture;

[0057] (2) Put the paste graphite mixture into the feeding port of the stretching machine, enter the stretching mechanism after adding the feeding mechanism, connect the power transmission mechanism, control the working temperature to 60°C, and set the speed to 800r / min , the cam rotors rotate in the same direction. In the process of passing through the central shaft continuously, the two cam rotors generate compressive force and tensile force during the rotation process, and the paste graphite mixture is continuously compressed and stretched. During the stretching process, the graphite is exfoliated into graphene, and the graphene is collected by the collection mechanism.

[0058] like figure 1 shown and figure 2 As shown, the stretching machi...

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Abstract

The invention provides a method based on extensional rheology for stripping graphene and application of the graphene. The method comprises the following steps: collectively adding graphite and viscous substances into a designed stretching mechanism, adopting a cam rotor in a cavity to enable the size of the cavity in a drum to be reduced and increased in reciprocating manner when in rotation, compressing and stretching the graphite and the viscous substances in the cavity in a reciprocating manner by virtue of a can and a leaf spring, and stretching, cutting and stripping a graphite mixture under the adhesion effect of an adhesive additive to obtain a graphene precursor, so that the lattice damage of the graphene caused by an excessively large shear force is effectively avoided. According to the scheme disclosed by the invention, the preparation process is simple, the source of raw materials is wide, the pollution is avoided, the cost is low, and the prepared graphene is high in quality, easy to store and transport, and easy for realizing the industrialized mass production.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a method for exfoliating graphene based on extensional rheology and the application of graphene. Background technique [0002] Graphene is a planar carbon nanomaterial composed of a layer of carbon atoms. It is the thinnest known two-dimensional material, with a thickness of only 0.335nm. It is composed of a hexagonal lattice. The carbon atoms in graphene are connected by σ bonds, endowing graphene with extremely excellent mechanical properties and structural rigidity. Moreover, in graphene, each carbon atom has an unbonded p-electron. These p-electrons can move freely in the crystal, and the speed of movement is as high as 1 / 300 of the speed of light, which endows graphene with good conductivity. Optically, graphene is almost completely transparent, absorbing only 2.3 percent of light. Graphene has unique mechanical, optical and electrical properties, and graphene has very b...

Claims

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Application Information

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IPC IPC(8): C01B32/19C01B32/192B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B2204/04C01B2204/32
Inventor 陈庆曾军堂王镭迪
Owner 东港智科产业园有限公司
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