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Resilient magnetic carbon foam and preparation method thereof

A magnetic carbon and foam technology, which is used in the preparation/purification of carbon, ceramic products, other household appliances, etc., can solve the problems of rare reports, and achieve the effects of excellent loss capacity, low density and suitable electrical conductivity

Active Publication Date: 2020-06-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of melamine foam to prepare the resilient magnetic carbon foam in the field of electromagnetic shielding and absorption has been rarely reported.

Method used

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  • Resilient magnetic carbon foam and preparation method thereof
  • Resilient magnetic carbon foam and preparation method thereof
  • Resilient magnetic carbon foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of resilient magnetic carbon foam, comprising the following steps:

[0039] Step 1. Put 3×3×3cm 3 The melamine foam was ultrasonically cleaned three times in absolute ethanol and deionized water, and then dried in an oven at 60°C to constant weight;

[0040] Step 2, immerse the melamine foam treated in step 1 in a cobalt acetate solution with a mass percentage concentration of 1% for 24 hours; then squeeze repeatedly to remove the remaining cobalt acetate solution in the foam, and then use deionized water to clean the foam to Removal of Co not complexed with melamine foam 2+ ;

[0041] Step three, the Co obtained in step two 2+ The metal ion complex foam is carbonized and pyrolyzed in a tube furnace under the protection of argon to prepare resilient magnetic carbon foam;

[0042] The procedure for carbonization pyrolysis in a tube furnace consists of the following steps:

[0043] Step 1. Repeatedly evacuate and fill the tube furnace with argon to...

Embodiment 2

[0049] A preparation method of resilient magnetic carbon foam, comprising the following steps:

[0050] Step 1. Put 3×3×3cm 3 The melamine foam was ultrasonically cleaned three times in absolute ethanol and deionized water, and then dried in an oven at 60 °C to constant weight.

[0051] Step 2, immerse the melamine foam treated in step 1 in a cobalt acetate solution with a mass percentage concentration of 1% for 24 hours; then squeeze repeatedly to remove the remaining cobalt acetate solution in the foam, and then use deionized water to clean the foam to Removal of Co not complexed with melamine foam 2+ ;

[0052] Step three, the Co obtained in step two 2+ The metal ion complex foam is carbonized and pyrolyzed in a tube furnace under the protection of argon to prepare resilient magnetic carbon foam;

[0053] The procedure for carbonization pyrolysis in a tube furnace consists of the following steps:

[0054] Step 1. Repeatedly evacuate and fill the tube furnace with argon...

Embodiment 3

[0060] A preparation method of resilient magnetic carbon foam, comprising the following steps:

[0061] Step 1. Put 3×3×3cm 3 The melamine foam was ultrasonically cleaned three times in absolute ethanol and deionized water, and then dried in an oven at 70 °C to constant weight.

[0062] Step 2, immerse the melamine foam treated in step 1 in a 1% cobalt acetate solution for 36 hours; then squeeze repeatedly to remove the remaining cobalt acetate solution in the foam, and then use deionized water to clean the foam to Removal of Co not complexed with melamine foam 2+ ;

[0063] Step three, the Co obtained in step two 2+ The metal ion complex foam is carbonized and pyrolyzed in a tube furnace under the protection of argon to prepare resilient magnetic carbon foam;

[0064] The procedure for carbonization pyrolysis in a tube furnace consists of the following steps:

[0065] Step 1. Repeatedly evacuate and fill the tube furnace with argon to ensure that the air is completely re...

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Abstract

The invention discloses resilient magnetic carbon foam and a preparation method thereof. The magnetic carbon foam material is prepared from melamine foam through ultrasonic cleaning, magnetic metal ion solution soaking and carbonization pyrolysis in an argon atmosphere. The resilient magnetic carbon foam is composed of a melamine foam carbonized porous framework, magnetic metal nanoparticles and carbon nanotubes formed by catalyzing the magnetic metal nanoparticles, and the magnetic metal nanoparticles are coated with the generated carbon nanotubes and evenly distributed on the surface of themelamine foam framework. The magnetic carbon foam has the advantages of magnetism, electrical conductivity, low density, high specific surface area, high resilience and the like; the resilient magnetic carbon foam has good application prospects in the fields of electromagnetic shielding and wave absorption, magnetic sensors, oil absorption, electrochemical catalysis, battery electrodes, supercapacitors and the like, and especially in the aspect of electromagnetic wave absorption, broadband strong absorption of electromagnetic waves can be achieved under the condition of a low addition amount.

Description

technical field [0001] The invention relates to the technical field of resilient magnetic carbon foam and its preparation, in particular to a resilient magnetic nano metal / carbon foam and a preparation method thereof. Background technique [0002] Due to its low density, high specific surface area, high porosity and high resilience, the resilient magnetic carbon foam is widely used in electromagnetic shielding and wave absorption, magnetic sensors, oil absorption, electrochemical catalysis, battery electrodes, supercapacitors, etc. It has a very broad application prospect in many fields and is an indispensable material. At present, resilient magnetic carbon foams are mainly prepared by loading magnetic particles on the surface of resilient porous foam materials, or by adding magnetic particles during the preparation process of resilient porous foam materials. However, the application of the resilient magnetic carbon foam prepared by the above method in the fields of electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/524C04B35/622C04B38/00C01B32/05
CPCC01B32/05C04B35/524C04B35/622C04B38/00C04B2235/3272C04B2235/3275C04B2235/3279C04B2235/3817C04B2235/405C04B2235/656C04B2235/6562C04B2235/6567C04B2235/658C04B2235/94C04B2235/96
Inventor 王玉忠师海岗赵海波程金波李书亮张爱泞
Owner SICHUAN UNIV
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