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Method for preparing graphene by pulling jelly

A technology of graphene and jelly, which is applied in the field of drawing and preparing graphene from jelly, which can solve the problems of graphene lattice damage, environmental hazards, etc., and achieve uniform layer distribution, no environmental pollution, and fewer layers Effect

Active Publication Date: 2016-04-20
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the defect that graphene is difficult to mass-produce at low cost at present, the present invention proposes a method for preparing graphene by drawing jelly, thereby realizing the continuous and stable preparation of graphene at low cost, and overcoming the current chemical redox method and direct method. The damage to the graphene lattice and the serious harm to the environment caused by grinding and preparing graphene have further promoted the mass production of high-quality and low-cost graphene

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0038] Utilize the method for preparing graphene by jelly drawing:

[0039] (1) Knead flake graphite with a radial size greater than 50 microns and adhesive glucose at a mass ratio of 1:50 in a kneader for 15 minutes, and add an appropriate amount of glycerin to prepare a gel with a viscosity of 3000 cp;

[0040] (2) Send the colloid obtained in step (1) into a reciprocating single-screw extruder with an aspect ratio of 48 / 1 and a screw diameter of 20mm through forced extrusion, set the screw speed to 100rpm, and the screw jacket to circulate and cool Water controls the screw temperature below 80°C. The reciprocating single-screw extruder reciprocates axially while rotating and shearing. The graphite dispersed in the adhesive is sheared by the continuously rotating screw and pulled back and forth in the axial direction. So that the graphite is continuously pulled and peeled off in the adhesive;

[0041](3) Submerge the drawn material obtained in step (2) in distilled water fo...

Embodiment 2

[0043] The method for preparing graphene by jelly drawing:

[0044] (1) Knead expanded graphite with a radial dimension greater than 50 microns and the adhesive arabinose at a mass ratio of 1:80 in a kneader for 20 minutes, and add an appropriate amount of glycerin to prepare a gel with a viscosity of 4500 cp;

[0045] (2) Send the jelly obtained in step (1) into a reciprocating single-screw extruder through forced extrusion, set the screw speed at 150rpm, and control the temperature of the screw with circulating cooling water in the jacket of the screw barrel to be lower than 80°C. The single-screw extruder reciprocates axially while rotating and shearing. The graphite dispersed in the adhesive is sheared by the continuously rotating screw and pulled back and forth in the axial direction, so that the graphite is continuously drawn in the adhesive. peel off;

[0046] (3) Submerge the drawn material obtained in step (2) in distilled water for more than 24 hours, wash with dist...

Embodiment 3

[0048] Utilize the method for preparing graphene by jelly drawing:

[0049] (1) Knead pyrolytic graphite powder with a radial size greater than 50 microns and adhesive mannose at a mass ratio of 1:100 in a kneader for 35 minutes, and add an appropriate amount of glycerin to prepare a gel with a viscosity of 5000 cp;

[0050] (2) Send the colloid obtained in step (1) into a reciprocating single-screw extruder with an aspect ratio of 25 / 1 and a screw diameter of 45mm through forced extrusion, set the screw speed at 120rpm, and the screw jacket for cooling Water controls the screw temperature below 80°C. The reciprocating single-screw extruder reciprocates axially while rotating and shearing. The graphite dispersed in the adhesive is sheared by the continuously rotating screw and pulled back and forth in the axial direction. So that the graphite is continuously pulled and peeled off in the adhesive;

[0051] (3) Submerge the drawn material obtained in step (2) in distilled water...

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Abstract

The invention relates to the field of a graphene material, in particular to a method for preparing graphene by pulling jelly by a low cost mechanical continuous stripping method. The method comprises the steps of graphite is dispersed into high viscosity jelly by using shearing and axial reciprocated pulling of a rotating reciprocating screw extruder in a screw spiral direction, a graphite sheet layer is continuously stripped in a jelly pulling process without damaging a layer structure, thus furthest protecting the layer structure of the graphene and realizing continuous stripping; the obtained graphene is less in layer number and uniform in layer number distribution. Continuous and stable preparing of the graphene is realized, severe harm to the environment and damage to a graphene crystal lattice caused by that a chemical reduction method and direct grinding are used for preparing the graphene, and high quality and low cost volume production of the graphene is further promoted. The method has obvious market application value.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to the preparation of graphene by a low-cost mechanical continuous exfoliation method, in particular to a method for preparing graphene by pulling out jelly. Background technique [0002] Graphene is a new type of material with a two-dimensional honeycomb structure formed by stacking a single layer of carbon atoms. Since 2004, Dr. Novoselov and Professor Geim, two scientists from the University of Manchester in the United Kingdom, successfully separated high-quality graphene that exists alone in the laboratory by using the "tape method" mechanical exfoliation, which opened a research boom for graphene materials. With the continuous deepening of research, new preparation methods emerge in an endless stream, mainly including micromechanical exfoliation method, redox method, orientation epitaxy method, chemical vapor deposition method and so on. [0003] In foreign countries, the vap...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y30/00
CPCB82Y30/00C01B2204/04C01B2204/32
Inventor 陈庆曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD
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