Peeling method of layered material and high-quality peeling material obtained by peeling

A layered material and delamination technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems affecting graphene performance, original structure damage, etc.

Inactive Publication Date: 2018-04-06
哈尔滨万鑫石墨谷科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials used in this process also use acidic substances to intercalate the graphite sheets through chemical reactions, which will still cause damage to the original structure to a certain extent, thereby affecting the performance of the final graphene.

Method used

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  • Peeling method of layered material and high-quality peeling material obtained by peeling
  • Peeling method of layered material and high-quality peeling material obtained by peeling
  • Peeling method of layered material and high-quality peeling material obtained by peeling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] (1) Taking natural flake graphite (13 μm in particle size) as starting raw material, by natural flake graphite: ammoniacal liquor (mass ratio)=1:250 ratio, in natural flake graphite, add intercalant ammoniacal liquor, mechanical stirring mixes 4h, Realize the infiltration of natural flake graphite, intercalation of ammonia water to the surface and interlayer of natural flake graphite;

[0074] (2) slowly drip activator hydrogen peroxide (mass fraction is 50%) in the mixed liquor that step (1) obtains, the add-on of hydrogen peroxide is 20 times of the natural flake graphite quality of step (1), and simultaneously with 300r / Stirring at a speed of min, the activator hydrogen peroxide reacts with the intercalation agent ammonia water to generate airflow and peel off the sheets of natural graphite flakes;

[0075] (3) after completion of the reaction, add distilled water to the solution obtained in step (2) (wherein, the mass ratio of distilled water and the natural flake ...

Embodiment 2

[0084] (1) take natural flake graphite (30 μ m in particle diameter) as starting raw material, by natural flake graphite: the ratio of chlorosulfonic acid (mass ratio)=1:150, add intercalation agent chlorosulfonic acid in natural flake graphite, mechanical Stir and mix for 8 hours to realize the infiltration of natural flake graphite, and the intercalation of chlorosulfonic acid to the surface and interlayer of natural flake graphite;

[0085] (2) slowly drip activator hydrogen peroxide (mass fraction is 50%) in the mixed solution that step (1) obtains, the add-on of hydrogen peroxide is 40 times of the natural flake graphite quality of step (1), and simultaneously with 500r / Stirring at a speed of min, the activator hydrogen peroxide reacts with the intercalation agent chlorosulfonic acid to generate a strong air flow, which makes the sheets of natural graphite flakes peel off;

[0086] (3) After the reaction is completed, add distilled water (wherein, the mass ratio of disti...

Embodiment 3

[0092] (1) Take expanded graphite worms as starting raw material, press expanded graphite worms: the ratio of chlorosulfonic acid (mass ratio)=1:50, add intercalation agent chlorosulfonic acid in expanded graphite worms, mechanical stirring mixes 1h, realizes Infiltration of expanded graphite worms, intercalation of chlorosulfonic acid to the surface and interlayer of expanded graphite worms;

[0093] (2) slowly add activator sodium nitrite in the mixed solution that step (1) obtains, the add-on of sodium nitrite is 85 times of the expanded graphite worm quality of step (1), and simultaneously stirs rapidly with 400r / min speed , the activator sodium nitrite reacts with the intercalation agent chlorosulfonic acid to generate airflow, which makes the sheets of expanded graphite worms peel off;

[0094] (3) After the reaction is completed, add distilled water (wherein, the mass ratio of distilled water to the expanded graphite worms of step (1) is 200:1) to the solution obtained ...

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Abstract

The invention discloses a peeling method of a layered material and a high-quality peeling material obtained by peeling. The method comprises the following steps: 1) mixing the layered material and anintercalating agent to achieve infiltration of the layered material by the intercalating agent; 2) adding an activating agent to allow the activating agent reacted with the intercalating agent, so that the physical impact of a generated gas flow on the layered material causes the sheet layers of the layered material to peel, thereby resulting in a dispersion solution of a peeling material precursor; and 3) mixing the obtained dispersion solution of the peeling material precursor with a dispersion medium, and performing physical disintegration on the obtained dispersion system so as to obtain adispersion solution of the peeling material. According to the peeling method, the gas flow compact generated by the violent reaction of the intercalating agent and the activating agent which are intercalated on the sheet layer surfaces and at the interlaminations is used to overcome a force between the sheet layers to realize expansion peeling, so that the peeling material with less layer and high quality is obtained; and the process is simple, the production cycle is short, and high efficiency mass production of the peeling material can be realized.

Description

technical field [0001] The invention belongs to the technical field of stripping layered materials, and relates to a stripping method of a layered material and a high-quality stripped material obtained by stripping, in particular to a method for physically expanding and stripping a layered material and a high-quality stripped layer obtained by stripping Material. Background technique [0002] In 2010, Andre Geim and Konstantin Novoselov of the University of Manchester won the Nobel Prize in Physics for their pioneering experiments on the two-dimensional space material graphene (graphene), setting off a research boom. Graphene is a two-dimensional honeycomb lattice structure formed by a single layer of carbon atoms tightly packed, and is the basic unit of other dimensional carbon materials (such as zero-dimensional fullerene, one-dimensional carbon nanotubes, and three-dimensional graphite). It is the thinnest known material in the world, and the thickness of single-layer gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19
CPCC01B2204/04
Inventor 时浩梅佳刘智良贺雪琴马芳晴黄须啟
Owner 哈尔滨万鑫石墨谷科技有限公司
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