Graphene-carrying phyllosilicate nano composite material and preparation method thereof

A technology of nanocomposite material and layered silicate, which is applied in the field of nanocomposite material and its preparation, can solve the troublesome process of removing the stabilizer, cannot be preserved for a long time, and affects the properties of graphene, etc., and achieves the goal of preparing The method is simple and environmentally friendly, good straightness, and the effect of the simple method

Active Publication Date: 2014-05-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, people used hydrazine hydrate as a strong reducing agent to reduce the oxidized graphene. Although the reduction effect is very good, hydrazine hydrate is a highly toxic and expensive chemical reagent.
For the prepared graphene, its potential application value can be highlighted in various industries, but because the graphene prepared by the Hummers' method will undergo a large amount of flocculation in the water phase, it cannot be preserved for a long time, so it is also which limits its further application
In past research, people have tried various surfactants, polymers with surfactant properties and biomacromolecules as stabilizers, and used non-covalent modification to obtain a composite graphene materials, although this method can prepare graphene that is stably dispersed in water, the presence of stabilizers affects the properties of graphene and the process of completely removing the stabilizers is also very troublesome

Method used

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  • Graphene-carrying phyllosilicate nano composite material and preparation method thereof
  • Graphene-carrying phyllosilicate nano composite material and preparation method thereof
  • Graphene-carrying phyllosilicate nano composite material and preparation method thereof

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Effect test

Embodiment 1

[0026] Organic rectorite is obtained by reacting 0.1 CEC cetyltrimethylammonium bromide and calcium-based rectorite under microwave conditions, and then organic rectorite and graphene oxide (mass ratio is 5:1) respectively dispersed in water, wherein the organic rectorite solution was heated and stirred overnight at room temperature, and the graphene oxide was first dispersed ultrasonically, and the organic rectorite dispersion was added dropwise to the graphene oxide solution and dispersed ultrasonically; the organic rectorite After ultrasonication of the mixed solution of graphene / graphene oxide, the pH was adjusted to 8, and the carboxymethyl chitosan quaternary ammonium salt solution A: 0.4%, B: 4.0% (both mass percentages) were prepared, heated and stirred in an oil bath to 85 °C, and the A solution Add graphene oxide dropwise for 5 minutes. After half an hour of reaction, perform ultrasonic operation to disperse the solution evenly; continue to add solution B dropwise for 3...

Embodiment 2

[0028] Organic rectorite is obtained by reacting 0.5 CEC dodecyltrimethylammonium bromide and calcium-based rectorite under microwave conditions, and then organic rectorite and graphene oxide (mass ratio: 10:1) are respectively Dispersed in water, wherein the organic rectorite solution was heated and stirred overnight at room temperature, the graphene oxide was first ultrasonically dispersed, and the organic rectorite dispersion was added dropwise to the graphene oxide solution and ultrasonically dispersed; the organic rectorite / The pH of the graphene oxide mixed solution was adjusted to 9 after ultrasonication, and the carboxymethyl chitosan quaternary ammonium salt solution A: 0.5%, B: 3.0% (both mass percentages) were prepared, heated and stirred in an oil bath to 90°C, and the A solution was dropped Add graphene oxide, the dropping time is 20 min, and after 45 min of reaction, perform ultrasonic operation to disperse the solution evenly; continue to drop B solution, the dr...

Embodiment 3

[0030] Organic rectorite is obtained by reacting propylene bis(octadecyldimethylammonium chloride) with calcium-based rectorite under microwave conditions at 3.0 CEC, and then organic rectorite and graphene oxide (mass ratio 20:1) were respectively dispersed in water, wherein the organic rectorite solution was heated and stirred overnight at room temperature, the graphene oxide was first ultrasonically dispersed, and the organic rectorite dispersion was added drop by drop to the graphene oxide solution and ultrasonically dispersed; The pH of the organic rectorite / graphene oxide mixed solution was adjusted to 10 after ultrasonication, and the carboxymethyl chitosan quaternary ammonium salt solution A: 0.6%, B: 2.0% (both mass percentages) were prepared, heated and stirred in an oil bath to At 90 ℃, A solution was added dropwise to graphene oxide for 10 min, and after 1 hour of reaction, ultrasonic operation was performed to disperse the solution evenly; continue to drop B soluti...

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Abstract

The invention provides a graphene-carrying phyllosilicate nano composite material and a preparation method thereof. By using a water-soluble polymer chitosan-based material as a reducing agent and a stabilizing agent, the space between phyllosilicates is increased when the graphene is reduced and oxidized, and the phyllosilicate is used as a stabilizing agent and a template of graphene, and thus the prepared graphene is carried on the phyllosilicate; compared with the graphene in a phyllosilicate-free composite, the graphene in the phyllosilicate-containing composite is better in straightness, and the function of the template of the phyllosilicate is reflected. According to the preparation method, toxic chemical reducing agents and stabilizing agents are prevented from being used, the preparation method is simple and environment, the obtained graphene-carrying phyllosilicate nano composite material is excellent dispersing stability in water, and better in application prospect in multiple fields such as medicine carrying, biomedicine, and adsorption.

Description

Technical field [0001] The present invention involves a nano -composite material and its preparation method, which belongs to the field of nano technology.Specifically, a graphene -shaped silicate nano -composite material and its preparation method. Background technique [0002] Graphene is a category of hotspot materials that have only been discovered and applied in recent years. Its structure is a single -layer graphite layer. It is the basic unit of graphite, carbon nanotubes, and pellane.The structure of the graphene is very stable, and the connection between the carbon atoms is very flexible. When the external force is subject to external force, the carbon atomic surface is bent and deformed, so that the carbon atom does not have to be re -arranged to adapt to the external force.In terms of chemical nature, graphene has many excellent properties, excellent conductivity, superior thermal stability, and excellent mechanical properties. [0003] The oxidation reduction method p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184C01B32/19
Inventor 王小英李晓云韩洋孙润仓
Owner SOUTH CHINA UNIV OF TECH
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