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Method for preparing graphene by using halloysite nanotubes having curly layered structure

A technology of halloysite nanotubes and curled layers, applied in graphene, nanocarbon, chemical instruments and methods, etc., can solve the problem of difficulty in preparing high-quality graphene or graphene-like materials, poor material uniformity, and preparation costs. Advanced problems, to avoid secondary aggregation, uniform number of layers, low preparation cost

Inactive Publication Date: 2017-09-05
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the layered template materials used in the above methods are planar and belong to a multilayer structure. The prepared graphene or graphene-like materials are subject to particle size, resulting in poor uniformity of the material, high preparation costs, and complicated operations. Difficult to control, it is difficult to prepare high-quality graphene or graphene-like materials

Method used

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  • Method for preparing graphene by using halloysite nanotubes having curly layered structure
  • Method for preparing graphene by using halloysite nanotubes having curly layered structure
  • Method for preparing graphene by using halloysite nanotubes having curly layered structure

Examples

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Effect test

Embodiment 1

[0033] The powdered halloysite nanotubes with curly layered structure were dried in a constant temperature oven at 100 °C for 24 h. Take 5g of halloysite nanotubes, mix 60g of dimethyl sulfoxide and 6mL of deionized water, stir at room temperature for 72 hours, wash with ethanol 2-3 times, and dry at 60°C for 48 hours to obtain dimethyl sulfoxide / halloysite nanotubes Tube intercalation complex.

[0034] Take 5g of dimethyl sulfoxide / halloysite nanotube intercalation complex and 33g of acrylonitrile in a round-bottomed flask, and react with magnetic stirring at 80°C for 6h, then wash the product 2-3 times with absolute ethanol, and dry at 60°C After 24 hours, the acrylonitrile / halloysite nanotube intercalation composite was obtained.

[0035] The acrylonitrile / halloysite nanotube intercalation composite was heat-treated at 200° C. for 5 h to polymerize acrylonitrile in situ to obtain a halloysite / polyacrylonitrile composite.

[0036] The halloysite-polyacrylonitrile composite...

Embodiment 2

[0040] The powdered halloysite nanotubes with curly layered structure were dried in a constant temperature oven at 100 °C for 24 h. Take 5g of halloysite nanotubes, 60g of potassium acetate and 4mL of deionized water, grind and mix them evenly in a mortar, place at room temperature for 24 hours, wash with absolute ethanol 2-3 times, and dry at 60°C for 24 hours to obtain halloysite / potassium acetate intercalation complex.

[0041] Take 40g of acrylamide, add it to 50mL of ethanol solution, stir to dissolve completely, pour it into a round bottom flask, and add 5g of halloysite / potassium acetate intercalation complex, and react with magnetic stirring at 100°C for 10h, then wash the product with ethanol for 2 -3 times, drying at 80°C for 24 hours to obtain halloysite-acrylamide intercalation complex. The halloysite-acrylamide intercalation composite was heat-treated at 350°C for 10 hours to obtain the halloysite / polyacrylamide composite.

[0042] The halloysite-polyacrylamide ...

Embodiment 3

[0045]The powdered halloysite nanotubes with curly layered structure were dried in a constant temperature oven at 100 °C for 24 h. Take 5 g of halloysite nanotubes, 55 g of nitrogen methyl formamide and 7 mL of deionized water, mix them, stir and react at room temperature for 72 hours, then wash with absolute ethanol for 2-3 times, and dry at 60°C for 48 hours to obtain nitrogen methyl formamide Amide / Hallosite Nanotube Intercalation Complex.

[0046] Take 5g of nitrogen methyl formamide / halloysite nanotube intercalation complex, add 40g of acrylonitrile into a round bottom flask, stir and react with magnetic force at 90°C for 5h, wash with absolute ethanol 2-3 times, and dry at 60°C After 24 hours, the acrylonitrile / halloysite nanotube intercalation composite was obtained. The acrylonitrile / halloysite nanotube intercalation composite was heat-treated at 350° C. for 5 h to obtain the halloysite / polyacrylonitrile composite.

[0047] Put the halloysite-polyacrylonitrile compos...

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Abstract

The invention relates to a method for preparing graphene by using halloysite nanotubes having curly layered structure, and belongs to the technical field of preparation of a chemical material. The method comprises the following steps: taking water as a solvent; mixing low molecular weight organic matters with powdery halloysite nanotubes having the curly layered structure to obtain halloysite nanotubes inserted with low molecular weight organic matters among layers; replacing the low molecular weight organic matters by using polymer monomers; carrying out polymerization to obtain a compound of polymer and the halloysite nanotubes; calcining the compound; and washing the compound by using a mixed solution of hydrofluoric acid and hydrochloric acid to obtain graphene powder. The graphene with a structure including 2-4 layers can be prepared. The preparation method is simple, is easy to operate and low in preparation cost, and cannot pollute the environment.

Description

technical field [0001] The invention belongs to the technical field of preparation of chemical materials, and in particular relates to the preparation technology of graphene nanomaterials. Background technique [0002] In 2004, Geim and Novoselov, physicists at the University of Manchester in the United Kingdom, successfully separated single-layer graphene from graphite for the first time. Known as "black gold" and "the king of new materials", scientists even predict that graphene will "completely change the 21st century". It is very likely to set off a disruptive new technology and new industry revolution sweeping the world. [0003] The preparation methods of graphene mainly include mechanical exfoliation method, crystal epitaxial growth method, chemical redox method, chemical vapor deposition method and so on. The mechanical exfoliation method has low efficiency and high cost, and is not suitable for large-scale production; the epitaxial growth method consumes a lot of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
CPCC01B2204/04C01P2002/82C01P2004/03C01P2004/04
Inventor 程志林刘赞
Owner YANGZHOU UNIV
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