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Preparing method of nano-Fe3O4 coating carbon nanotube magnetic composite material

A technology of ferroferric oxide and carbon nanotubes, applied in nanostructure manufacturing, chemical instruments and methods, nanotechnology, etc., can solve problems such as long reaction time, undiscussed magnetic properties of composite materials, and difficulty in controlling Fe, etc., to achieve light weight effect

Inactive Publication Date: 2007-05-30
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Jiang et al. reported on ChemMater 15 (2003) 2848 that Fe was synthesized in situ by solvothermal method using iron urea and carbon nanotubes as precursors. 3 o 4 Coated carbon nanotube composites, but the method used is complicated, the reaction time required is long, and it is difficult to control Fe 3 o 4 The structure and magnetic properties of the composite materials have not yet been explored

Method used

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  • Preparing method of nano-Fe3O4 coating carbon nanotube magnetic composite material
  • Preparing method of nano-Fe3O4 coating carbon nanotube magnetic composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) At room temperature, add 3 g of carbon nanotubes with a diameter of 10-20 nanometers into 150 ml of concentrated nitric acid, stir and mix for 30 minutes at a speed of 500 rpm, and ultrasonically disperse for 30 minutes. Medium reflux reaction for 4 hours, then lower the temperature of the reflux reaction mixture to 25°C, filter with a 0.85 μm filter membrane, wash and filter with deionized water until the pH is 7, and obtain carbon with functional groups such as carbonyl, hydroxyl, and carboxyl on the surface. Nanotubes and carbon nanotubes are not dried;

[0031] (2) Put the carbon nanotubes with functional groups such as carbonyl, hydroxyl, and carboxyl on the surface obtained in step (1) into deionized water, ultrasonically disperse for 30 minutes, stir and disperse for 30 minutes, so that the weight percent concentration of the suspension is 0.5%;

[0032] (3) ferrous chloride salt and ferric chloride are respectively made into the aqueous solution of appropria...

Embodiment 2

[0036](1) At room temperature, add 5 g of carbon nanotubes with a diameter of 20-40 nanometers into 200 ml of concentrated nitric acid, stir and mix for 30 minutes at a speed of 500 rpm, and ultrasonically disperse for 30 minutes. Medium reflux reaction for 4.5 hours, then lower the temperature of the reflux reaction mixture to 25°C, filter with a 0.85 μm filter membrane, wash and filter with deionized water until the pH is 6.5, and obtain carbon with functional groups such as carbonyl, hydroxyl, and carboxyl on the surface. Nanotubes and carbon nanotubes are not dried;

[0037] (2) Put the carbon nanotubes with functional groups such as carbonyl, hydroxyl, and carboxyl on the surface obtained in step (1) into deionized water, and carry out ultrasonic or stirring dispersion, so that the concentration by weight of the suspension is 1%;

[0038] (3) ferrous chloride salt and ferric chloride are respectively made into the aqueous solution of appropriate concentration, by ferrous ...

Embodiment 3

[0042] (1) At room temperature, add 2.5 g of carbon nanotubes with a diameter of 40-60 nanometers into 150 ml of concentrated nitric acid, stir and mix for 1 hour at a speed of 500 rpm, and ultrasonically disperse for 30 minutes. Reflux reaction in the bath for 4.5 hours, then lower the temperature of the reflux reaction mixture to 25°C, filter with a 0.85 μm filter membrane, wash and filter with deionized water until the pH is 7, and obtain carbonyl, hydroxyl, carboxyl and other functional groups on the surface Carbon nanotubes, carbon nanotubes are not dried;

[0043] (2) Put the carbon nanotubes with functional groups such as carbonyl, hydroxyl, and carboxyl on the surface obtained in step (1) into deionized water, and carry out ultrasonic or stirring dispersion, so that the concentration by weight of the suspension is 2%;

[0044] (3) ferrous chloride salt and ferric chloride are respectively made into the aqueous solution of appropriate concentration, by ferrous chloride:...

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Abstract

This invention belongs to nanometer compound materials process and application technique field and to one carbon nanometer tube and ferriferous oxide compound materials process. This invention discloses one nanometer ferriferous oxide to cover carbon nanometer magnetic compound materials. This invention can process carbon nanometer tube in aqua forties for regurgitation and its surface leads in carbonyl, hydroxyl group and carboxyl group function groups, wherein, under outer magnetic field, the groups can be absorbed onto nanometer tube surface Fe3+ and Fe2+ with OH-1 to generate deposition reaction.

Description

technical field [0001] The invention relates to a preparation method of a magnetic nano-composite material, in particular to a preparation method of a novel magnetic nano-composite material coated with carbon nanotubes in a self-assembled manner by nanometer iron tetroxide. Background technique [0002] Magnetic composite materials are widely used in the preparation of high-density magnetic recording materials for data storage, as well as in the preparation of wave-absorbing materials, electromagnetic shielding materials, inks for electrophotographic printing, wide-band transformers, noise filters, and directional heat collection in medicine to treat tumors and targeted drug delivery. [0003] Carbon nanotubes have many novel and unique properties, and scientists have paid great attention to them. Studies have shown that carbon nanotube composites prepared by coating carbon nanotubes exhibit more excellent physical and chemical properties, such as better optical properties,...

Claims

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Application Information

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IPC IPC(8): H01F41/02B01J19/00B22F1/02B82B3/00
Inventor 赵东林曾宪伟沈曾民
Owner BEIJING UNIV OF CHEM TECH
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