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One-step method for preparing cnts/fe nanocomposite

A technology of nanocomposite material and step method, which is applied in the field of preparing CNTs/Fe nanocomposite material, can solve the problems that the wave-absorbing performance is not greatly improved, and the preparation method is not very simple, etc., and achieves strong electromagnetic wave absorption ability, preparation method and The effect of simple materials and wide absorption frequency

Inactive Publication Date: 2016-04-20
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these have certain deficiencies, the preparation method is not very simple, and the microwave absorption performance has not been greatly improved.

Method used

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  • One-step method for preparing cnts/fe nanocomposite
  • One-step method for preparing cnts/fe nanocomposite
  • One-step method for preparing cnts/fe nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 600 mg of multi-walled carbon nanotubes, put them into a 1000 ml four-necked flask, and add 600 ml of solvent kerosene. Fix the four-neck flask and place it in the electric heating jacket, and connect the spherical condenser, temperature controller, mechanical stirrer, and air inlet pipe respectively. Under the condition of a mechanical stirring speed of 320r / min, nitrogen gas was introduced for 60min to exhaust the air in the device.

[0032] (2) The iron pentacarbonyl liquid is volatile. Under the water bath temperature of 60°C, the iron pentacarbonyl vapor is introduced into the four-necked flask and dissolved in kerosene, and then the four-necked flask is slowly heated to 180°C with an electric heating mantle. Condensation reflux. Continue with N 2 As a guide gas, lead iron pentacarbonyl vapor to be dissolved in kerosene in a four-neck flask for thermal decomposition, N 2 The flow rate was kept at 100ml / min, and the reaction was continued for 4h.

[00...

Embodiment 2

[0035] (1) is the same as (1) of Embodiment 1.

[0036](2) Iron pentacarbonyl liquid is volatile. Under the water bath temperature of 60°C, iron pentacarbonyl vapor is introduced into a four-necked flask and dissolved in kerosene, and then the four-necked flask is slowly heated to 200°C with an electric heating mantle, and the Condensation reflux. Continue with N 2 As a guide gas, guide iron pentacarbonyl liquid vapor to dissolve in kerosene in a four-neck flask for thermal decomposition, N 2 The flow rate was kept at 100ml / min, and the reaction was continued for 4h.

[0037] (3) is the same as (3) of embodiment 1.

Embodiment 3

[0039] (1) is the same as (1) of Embodiment 1.

[0040] (2) Iron pentacarbonyl liquid is volatile. Under the water bath temperature of 60°C, iron pentacarbonyl vapor is introduced into a four-necked flask and dissolved in kerosene, and then the four-necked flask is slowly heated to 200°C with an electric heating mantle, and the Condensation reflux. Continue with N 2 As a guide gas, guide iron pentacarbonyl liquid vapor to dissolve in kerosene in a four-neck flask for thermal decomposition, N 2 The flow rate was kept at 100ml / min, and the reaction was continued for 14h.

[0041] (3) is the same as (3) of embodiment 1.

[0042] figure 1 For the X-ray diffraction pattern (embodiment 1,2,3) of the CNTs / Fe nanocomposite material prepared under different temperatures and time, we can find out from the XRD figure of composite material, the diffraction peak of Fe(110) crystal plane It is very obvious that there are no peaks of other impurities and oxides, confirming that the prep...

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Abstract

The invention relates to a one-step method for preparing a CNTs / Fe nanometer composite material. The method comprises that: (1) carbon nano-tubes are weighed and placed into a four-necked flask, the solvent is kerosene, an electric jacket is controlled to slowly heat a reaction container to a temperature of 160-220 DEG C, condensation reflux is performed for 4-16 h, a protection gas is introduced into the reaction container during the heating, and the kerosene is greater than 5 times the volume of the carbon nano-tubes; and (2) at a bath temperature of 40-80 DEG C, iron pentacarbonyl steam is imported into the reaction container along with the protection gas, is dissolved into the solvent kerosene, and is subjected to thermal decomposition for 4-16 h, the product with the Fe nanoparticles loaded on the surface of the carbon nano-tubes is obtained under the mechanical stirring condition, and the product is washed a plurality of times with dehydrated alcohol or acetone, and then is subjected to vacuum drying at a temperature of 60+ / -10 DEG C to obtain the CNTs / Fe nanometer composite material. According to the present invention, the Fe particles with the size of about 20-30 nm can be uniformly distributed on the surface of the carbon nano-tubes and in the part of the carbon nano-tubes, and advantages of electromagnetic parameter adjustment achieving, simple and controllable process, low price, and easy industrial mass production achieving are provided.

Description

technical field [0001] The invention belongs to the field of microwave absorbing materials, in particular to a method for preparing CNTs / Fe nanometer composite materials. Background technique [0002] Since carbon nanotubes were first discovered by Japanese electron microscope scientist Lijima in the process of preparing C60 by arc method in 1991, their unique structure, excellent mechanical, electrical and chemical properties have rapidly become a major issue in materials science, physics, biology, chemistry and so on. It has become the research frontier and hotspot of international new materials. [0003] CNTs can be regarded as tubes formed by curling single-layer or multi-layer graphene, correspondingly called single-walled carbon nanotubes (SWCNT) and multi-walled carbon nanotubes (MWCNT), with tube diameters ranging from a few nanometers to tens of nanometers Between, the length can reach several microns. The special structure and dielectric properties of CNTs make i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/00B82Y30/00B82Y40/00
Inventor 张豹山王敏唐东明杨燚
Owner NANJING UNIV
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