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Environmental-friendly method for large-scale preparation of graphene

A large-scale preparation of graphene technology, applied in the field of graphene, can solve the problems of high cost, polluting the environment, and incapable of industrial scale production, and achieve the effect of green environmental protection and low cost of the preparation process

Active Publication Date: 2015-04-08
HUAQIAO UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a green method for preparing graphene on a large scale in order to solve the problems of high cost, low efficiency, polluting the environment and incapable of industrial scale production in the existing graphene preparation technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A green method for preparing graphene on a large scale, comprising the following steps:

[0028] (1) Take expanded graphite 4g, glucose 20g, the mass ratio of glucose and expanded graphite is 5:1;

[0029] (2) Put the glucose on the roller of the three-roller mill, heat the roller of the three-roller mill, wait until the softening point of glucose is 130°C, prepare the glucose melt as an adhesive, and start the operation of the three-roller mill , until the glucose melt is flatly spread on the roller of the three-roll mill, then slowly add expanded graphite, and the three-roll mill continues to run and grind and peel off the added expanded graphite for 30 minutes to obtain a mixture of graphene and glucose melt;

[0030] (3) Submerge the graphene and glucose melt mixture obtained in step (2) in distilled water, first wash with 100°C distilled water for 3 times, then wash with normal temperature distilled water for 2 times, remove the adhesive glucose melt, and vacuum F...

Embodiment 2

[0032] A green method for preparing graphene on a large scale, comprising the following steps:

[0033] (1) Take by weighing natural graphite 4g, maltose 200g, the mass ratio of maltose and natural graphite is 50:1;

[0034] (2) Put the maltose on the roller of the three-roll mill, heat the roller of the three-roll mill, wait until the softening point of the maltose reaches 95°C, prepare the maltose melt as the adhesive, and start the operation of the three-roll mill , after the maltose melt is flatly spread on the roller of the three-roll mill, then slowly add natural graphite, and the three-roll mill continues to run to grind and peel off the added natural graphite for 2 hours to obtain a mixture of graphene and maltose melt;

[0035] (3) Submerge the graphene and maltose melt mixture obtained in step (2) in distilled water, first wash with 100°C distilled water for 3 times, then wash with normal temperature distilled water for 2 times, remove the adhesive maltose melt, and ...

Embodiment 3

[0037] A green method for preparing graphene on a large scale, comprising the following steps:

[0038] (1) Take pyrolysis graphite 2g, 500g of raffinose, and the mass ratio of raffinose and pyrolysis graphite is 250:1;

[0039] (2) Place the raffinose on the roller of the three-roll mill, heat the roller of the three-roll mill, and wait until the softening point of the raffinose reaches 65°C to obtain a melt of raffinose as an adhesive, and start to run for three Roller mill, after the raffinose melt is spread flat on the rollers of the three-roller mill, then slowly add pyrolytic graphite, and the three-roller mill continues to run to grind and peel off the added pyrolytic graphite for 24 hours to obtain graphene and cottonseed sugar melt mixture;

[0040] (3) immerse the graphene and raffinose melt mixture that step (2) obtains in distilled water, wash 3 times with 100 ℃ of distilled water first, then wash 2 times with normal temperature distilled water, remove adhesive ra...

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Abstract

The invention provides an environmental-friendly method for large-scale preparation of graphene. A water-soluble organic matter melt is used for assisting in three-roller stripping to prepare the grapheme. The environmental-friendly method specifically comprises the following steps: (1) weighing a water-soluble organic matter and graphite in the mass ratio of (5: 1)-(500:1); (2) putting the water-soluble organic matter on rollers of a three-roller grinding machine, heating the rollers till a softening point of the water-soluble organic matter is reached to prepare an adhesive, operating the three-roller grinding machine, spreading the adhesive on the rollers of the three-roller grinding machine, further slowly adding the graphite, and performing grinding and stripping on the added graphite; and (3) immersing a product obtained in the step (2) into distilled water and washing to remove the water-soluble organic matter so as to obtain the graphene. According to the green method provided by the invention, a physical method is adopted for preparing the graphene, and the preparation process is environmental friendly, non-toxic and harmless, and can be applied to first-layer safety in the biomedical field; and furthermore, the method has the advantages of no special requirements on equipment, low cost, high efficiency, large-scale production and the like, and is simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a green method for large-scale preparation of graphene. Background technique [0002] As a new type of two-dimensional carbonaceous material, graphene has unique structural characteristics and excellent electrical, mechanical, optical and thermal properties. It is widely used in nanoelectronic devices, energy storage materials, catalysis, sensors, drug carriers and functional composite materials. and other fields have broad application prospects. Studies have shown that graphene has great application prospects in the field of biomedicine, including targeted drug delivery, cell imaging, biological detection, and tumor treatment. However, the application of graphene in the biomedical field also needs to consider biological effects and safety. If the preparation process is green, environmentally friendly, non-toxic and harmless, the first level of safety for its application in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 陈国华林少芬赵立平洪江彬黄卫明
Owner HUAQIAO UNIVERSITY
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