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Method for preparing MWCNTs/Co1-xZnxFe2O4 magnetic nanocomposite material

A technology of co1-xznxfe2o4 and magnetic nanometer is applied in the field of preparation of magnetic carbon nanotube composite materials to achieve the effects of good dispersion, not easy to agglomerate and pure crystal phase

Inactive Publication Date: 2010-08-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, no MWCNTs / Co have been prepared by alcohol thermal method. 1-x Zn x Fe 2 o 4 Report on Magnetic Nanocomposites

Method used

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  • Method for preparing MWCNTs/Co1-xZnxFe2O4 magnetic nanocomposite material
  • Method for preparing MWCNTs/Co1-xZnxFe2O4 magnetic nanocomposite material
  • Method for preparing MWCNTs/Co1-xZnxFe2O4 magnetic nanocomposite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]Weigh 0.15g MWCNTs into a three-necked flask, then add 50ml (18mol / L) concentrated nitric acid, ultrasonically disperse for 40min, then raise the temperature to 100°C, and acidify for 24h. After the reaction, the MWCNTs suspension is washed, centrifuged, and dried to obtain the acidified MWCNTs. Then weigh 1.351g of ferric chloride, 0.371g of zinc nitrate hexahydrate, and 0.364g of cobalt nitrate hexahydrate into a three-necked flask, then add 50ml of ethylene glycol, and then add the above-mentioned acidified MWCNTs, and ultrasonically disperse for 45 minutes. After the ultrasonic dispersion is completed, add 3.6g of anhydrous sodium acetate and 1.2ml of polyethylene glycol 200, and mechanically stir for 30 minutes at a rotation speed of 500 rpm. After the solution is completely dissolved, pour the above solution into the autoclave , the temperature was raised to 180°C, and the reaction was carried out for 12 hours. After the reaction, the product was washed with deion...

Embodiment 2

[0029] Weigh 0.13g MWCNTs into a three-necked flask, then add 60ml (15mol / L) concentrated nitric acid, ultrasonically disperse for 20min, then raise the temperature to 110°C, and acidify for 20h. After the reaction, the MWCNTs suspension is washed, centrifuged, and dried to obtain the acidified MWCNTs. Then weigh 1.351g of ferric chloride, 0.594g of zinc nitrate hexahydrate, and 0.146g of cobalt nitrate hexahydrate into a three-necked flask, then add 50ml of ethylene glycol, and then add the above-mentioned acidified MWCNTs, and ultrasonically disperse for 45 minutes. After the ultrasonic dispersion is completed, add 3.7g of anhydrous sodium acetate and 1ml of polyethylene glycol 200, and mechanically stir for 20 minutes at a rotation speed of 500 rpm. After the solution is completely dissolved, pour the above solution into the reaction kettle. Raise the temperature to 190°C and react for 11h. After the reaction, the product was washed with deionized water, collected by a mag...

Embodiment 3

[0031] Weigh 0.14g MWCNTs into a three-necked flask, then add 45ml (16mol / L) concentrated nitric acid, ultrasonically disperse for 30min, then raise the temperature to 110°C, and acidify for 18h. After the reaction, the MWCNTs suspension is washed, centrifuged, and dried to obtain the acidified MWCNTs. Then weigh 1.351g of ferric chloride, 0.446g of zinc nitrate hexahydrate, and 0.291g of cobalt nitrate hexahydrate into a three-necked flask, then add 50ml of ethylene glycol, and then add the above-mentioned acidified MWCNTs, and ultrasonically disperse for 50 minutes. After the ultrasonic dispersion is completed, add 3.8g of anhydrous sodium acetate and 1.1ml of polyethylene glycol 200, and mechanically stir for 20min at a rotation speed of 600 rpm. After the solution is completely dissolved, pour the above solution into the reaction kettle , heated up to 200°C, and reacted for 11h. After the reaction, the product was washed with deionized water, collected by a magnet, and th...

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Abstract

The invention relates to a method for preparing a multiwall carbon nano-tube (MWCNTs) / cobalt zinc ferrite (Co1-xZnxFe2O4) magnetic nanocomposite material, which comprises the following steps of: (1) mixing a strong oxidizing acid and MWCNTs in a mass ratio of 1:200-1:400 and reflowing the solution in an oil bath after ultrasonic dispersion; and (2) dispersing the acidized MWCNTs into solution of ethylene glycol at room temperature, weighing a ferric salt, a zinc salt and a cobalt salt, dissolving the salts into the solution, adding polyethylene glycol and anhydrous sodium acetate after the added salts are fully dissolved, mechanically stirring the mixture, putting the mixture into a high-pressure reaction kettle for reaction after polyethylene glycol and anhydrous sodium acetate are fully dissolved, cooling the mixture to room temperature, and washing, collecting and drying a product. The magnetic nanocomposite material prepared by the method has the advantages of pure crystalline phase, high dispersibility, difficult agglomeration, high magnetization intensity and high magnetic induction sensitivity; and the method has the advantages of simple preparation process, relatively lower requirements on production equipment and easy industrial production.

Description

technical field [0001] The invention belongs to the field of preparation of magnetic carbon nanotube composite materials, in particular to a multi-walled carbon nanotube (MWCNTs) / cobalt zinc ferrite (Co 1-x Zn x Fe 2 o 4 ) Preparation method of magnetic nanocomposite material. Background technique [0002] Carbon nanotubes are hollow graphite cylinders with a diameter of about one percent of a human hair. They have huge tensile strength and a high aspect ratio, and also have excellent thermal, electrical and optical properties. These unique properties make it arouse widespread interest in many fields, such as electronics, materials science, biology, hydrogen storage, and even medicine. At present, magnetic carbon nanotube composites have also become one of the research hotspots. [0003] co 1-x Zn x Fe 2 o 4 It is a soft ferrite material with a spinel structure, which has high resistivity and high saturation magnetization, and has great potential in the application ...

Claims

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Application Information

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IPC IPC(8): H01F1/01C01G49/00
Inventor 李耀刚陈莹王宏志张青红朱美芳
Owner DONGHUA UNIV
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