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Preparation method for carbon nano tube/ oxidized grapheme/ nanometer Fe3O4 sandwich hybrid wave absorbing thin films

A technology for the preparation of carbon nanotubes and thin films, which is applied in the field of material science, can solve the problems of poor magnetic properties of carbon nanotubes and affect the dispersion performance of carbon nanotubes, and achieve the effects of large specific surface area, excellent electromagnetic wave absorption performance, and improved magnetic loss

Active Publication Date: 2014-05-21
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the magnetic properties of carbon nanotubes are generally relatively poor. In order to improve the magnetic properties of carbon nanotubes, the commonly used methods are: coating ferromagnetic metal on the surface of carbon nanotubes and adding ferromagnetic metals inside carbon nanotubes, but it will affect the magnetic properties of carbon nanotubes. Dispersion properties

Method used

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  • Preparation method for carbon nano tube/ oxidized grapheme/ nanometer Fe3O4 sandwich hybrid wave absorbing thin films
  • Preparation method for carbon nano tube/ oxidized grapheme/ nanometer Fe3O4 sandwich hybrid wave absorbing thin films
  • Preparation method for carbon nano tube/ oxidized grapheme/ nanometer Fe3O4 sandwich hybrid wave absorbing thin films

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Experimental program
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Embodiment 1

[0017] refer to figure 1 , 1 in the figure is Fe 3 o 4 layer; 2 is a carbon nanotube / graphene oxide hybrid layer.

[0018] Carbon Nanotube / Graphene Oxide / Nano-Fe 3 o 4 The preparation method of the sandwich hybrid wave-absorbing film is realized through the following steps:

[0019] (1) Graphite oxide was prepared by the Hummers method, adding graphite oxide to plasma water, and ultrasonically dispersed for 60 minutes to form a brown graphene oxide solution with uniform color. After high-speed centrifugation at 8000rpm for 20 minutes, the supernatant was taken, and the concentration of graphite oxide was 0.5wt%;

[0020] (2) Preparation of graphene oxide-carbon nanotube aqueous solution: add carbon nanotubes to the graphene oxide aqueous solution, stir magnetically for 80 minutes, disperse ultrasonically for 60 minutes, and take the supernatant after centrifugation. Wherein the carbon nanotubes are multi-walled carbon nanotubes, graphene oxide: carbon nanotube weight rati...

Embodiment 2

[0025] (1) Graphite oxide was prepared by the Hummers method. Graphite oxide was added to plasma water, and ultrasonically dispersed for 20 minutes to form a coffee-colored graphene oxide solution with uniform color. After high-speed centrifugation, the supernatant was taken, and the concentration of graphite oxide was 0.01wt%;

[0026] (2) Preparation of graphene oxide-carbon nanotube aqueous solution: add carbon nanotubes to the graphene oxide aqueous solution, stir magnetically for 30 minutes, disperse ultrasonically for 20 minutes, and take the supernatant after centrifugation. Wherein the carbon nanotubes are single-walled carbon nanotubes, multi-walled carbon nanotubes or functionalized carbon nanotubes, the weight ratio of graphene oxide:carbon nanotubes is 1:1, the concentration of carbon nanotubes is 0.01wt%, and the graphene oxide The concentration is 0.01wt%;

[0027] (3) Nano Fe 3 o 4 Dispersion preparation: the water-soluble nano-Fe 3 o 4 Dissolved in the mixt...

Embodiment 3

[0031] (1) Graphite oxide was prepared by the Hummers method. Graphite oxide was added to plasma water, and ultrasonically dispersed for 180 minutes to form a brown graphene oxide solution with uniform color. After high-speed centrifugation, the supernatant was taken, and the concentration of graphite oxide was 1 wt%;

[0032](2) Preparation of graphene oxide-carbon nanotube aqueous solution: add carbon nanotubes to the graphene oxide aqueous solution, stir magnetically for 180 minutes, disperse ultrasonically for 60 minutes, and take the supernatant after centrifugation. Wherein the carbon nanotubes are single-walled carbon nanotubes, multi-walled carbon nanotubes or functionalized carbon nanotubes, the weight ratio of graphene oxide:carbon nanotubes is 10:1, the concentration of carbon nanotubes is 0.1wt%, and the graphene oxide The concentration is 1wt%;

[0033] (3) Nano Fe 3 o 4 Dispersion preparation: the water-soluble nano-Fe 3 o 4 Dissolved in the mixture of deioni...

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Abstract

This invention discloses a preparation method for carbon nano tubes / oxidized grapheme / nanometer Fe3O4 sandwich hybrid wave absorbing thin films, which solves the problem that the magnetism of the carbon nano tube is bad and the technical problem that solving the magnetism problem impacts the dispersibility of the carbon nano tube. The preparation method comprises steps of (1) preparing oxidized grapheme by using a Hummers method, 2) preparing oxidized grapheme- carbon nano tube water solution, 3) preparing nanometer Fe3O4 dispersion liquid,(4) utilizing a vacuum suction filter device to prepare hybrid sandwich thin films, picking half volume of the oxidized grapheme- carbon nano tube dispersion liquid, adding the dispersion liquid to an upper container of the vacuum suction filter device to perform vacuum suction filtration, adding the nanometer FE3O4 dispersion liquid to perform suction and filtration when the suction and filtration of the grapheme- carbon nano tube dispersion liquid is finished, and adding the residual grapheme- carbon nano tube dispersion liquid when the suction and filtration of the Nanometer Fe3O4 is almost finished, (5) placing the carbon nano tube / oxidized grapheme / nanometer Fe3O4 hybrid thin films along with the filtration films into two stainless steel dies for compacting, putting into a vacuum oven, curing for 2-8 hours at 200DEG temperature, and striping the filtration films after taking out.

Description

technical field [0001] The invention relates to a method for preparing a wave-absorbing sandwich film, in particular to a carbon nanotube / graphene oxide / nanometer Fe 3 o 4 The invention discloses a method for preparing a wave-absorbing sandwich film, belonging to the technical field of material science. Background technique [0002] As a one-dimensional nanomaterial, carbon nanotubes have become an important choice for absorbing materials due to their excellent mechanical properties, good electrical properties, excellent chemical and thermal stability, and the unique nano-effects of one-dimensional nanostructures. However, the magnetic properties of carbon nanotubes are generally relatively poor. In order to improve the magnetic properties of carbon nanotubes, the commonly used methods are: coating ferromagnetic metal on the surface of carbon nanotubes and adding ferromagnetic metals inside carbon nanotubes, but it will affect the magnetic properties of carbon nanotubes. D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00C01B31/02C01B31/04C01G49/08C01B32/168C01B32/198
Inventor 卢少微曾宪君张春旭王继杰聂鹏
Owner SHENYANG AEROSPACE UNIVERSITY
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