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A kind of graphene/polyaniline/cobalt composite absorbing material and preparation method thereof

A composite wave absorbing material and wave absorbing material technology are applied in the directions of radiation absorbing coatings, chemical instruments and methods, and other chemical processes, etc., which can solve the problems of reducing the density of absorbents, and achieve strong dielectric loss performance and simple preparation process. , the effect of absorbing frequency bandwidth

Inactive Publication Date: 2015-10-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are many reports on the use of magnetic metal powder and conductive polymer as electromagnetic wave absorber, but there are few reports on graphene as absorber, especially the composite of graphene, polyaniline and metal powder with magnetic loss characteristics. The multi-component composite material can not only reduce the density of the absorbent, but also broaden the absorption frequency band and improve the absorption effect

Method used

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  • A kind of graphene/polyaniline/cobalt composite absorbing material and preparation method thereof
  • A kind of graphene/polyaniline/cobalt composite absorbing material and preparation method thereof
  • A kind of graphene/polyaniline/cobalt composite absorbing material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A preparation of absorbing material

[0026] (1) Add 1g of natural flake graphite and 0.5g of sodium nitrate to 40ml of concentrated sulfuric acid, cool in an ice bath to 4°C, and slowly add 5g of KMn0 4 , stirred and reacted for 90 minutes; then heated up to 30°C for 30 minutes; slowly added 50ml of deionized water, then stirred and reacted at 90°C for 20 minutes, cooled to room temperature, added 100ml of deionized water and 10ml of hydrogen peroxide, after centrifugal washing, vacuum drying to obtain oxidation graphite.

[0027] Weigh 0.11 g of graphite oxide, add 150 ml of deionized water and sonicate for 2 h to obtain a suspension of graphene oxide. Add 130ml of an acid solution containing 1.12g of aniline to the above graphene oxide suspension, stir at a constant speed for 20min, slowly add 20ml of an ammonium persulfate acid solution containing 1.82g of ammonium persulfate, react for 12h under ice bath conditions, and discard after standing still for 12 hours T...

Embodiment 2

[0032] A preparation of absorbing material

[0033] (1) Add 1g of natural flake graphite and 0.5g of sodium nitrate to 40ml of concentrated sulfuric acid, cool in an ice bath to 4°C, and slowly add 5g of KMn0 4 , stirred and reacted for 90 minutes; then heated up to 30°C for 30 minutes; slowly added 50ml of deionized water, then stirred and reacted at 90°C for 20 minutes, cooled to room temperature, added 100ml of deionized water and 10ml of hydrogen peroxide, after centrifugal washing, vacuum drying to obtain oxidation graphite.

[0034] Weigh 0.11 g of graphite oxide, add 150 ml of deionized water and sonicate for 2 h to obtain a suspension of graphene oxide. Add 130ml of acid solution containing 1.67g of aniline to the above graphene oxide suspension, stir at a constant speed for 20min, slowly add 20ml of ammonium persulfate acid solution containing 2.71g of ammonium persulfate, react for 12h under ice bath conditions, stand still for 12 hours and discard The supernatant ...

example 3

[0039] A preparation of absorbing material

[0040] (1) Add 1g of natural flake graphite and 0.5g of sodium nitrate to 40ml of concentrated sulfuric acid, cool in an ice bath to 4°C, and slowly add 5g of KMn0 4 , stirred and reacted for 90 minutes; then heated up to 30°C for 30 minutes; slowly added 50ml of deionized water, then stirred and reacted at 90°C for 20 minutes, cooled to room temperature, added 100ml of deionized water and 10ml of hydrogen peroxide, after centrifugal washing, vacuum drying to obtain oxidation graphite.

[0041] Weigh 0.11 g of graphite oxide, add 150 ml of deionized water and sonicate for 2 h to obtain a suspension of graphene oxide. Add 130ml of an acid solution containing 1.12g of aniline to the above graphene oxide suspension, stir at a constant speed for 20min, slowly add 20ml of an ammonium persulfate acid solution containing 1.82g of ammonium persulfate, react for 12h under ice bath conditions, and discard after standing still for 12 hours T...

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Abstract

The invention relates to a graphene / polyaniline / cobalt composite wave-absorbing material and a preparation method thereof, belonging to the field of preparing an electromagnetic wave absorption material. The wave-absorbing material comprise a film forming material and an electromagnetic wave absorbent, wherein paraffin is adopted as the film forming material, a graphene / polyaniline / cobalt ternary complex is adopted as the electromagnetic wave absorbent, and the mass ratio of the graphene / polyaniline / cobalt ternary complex to the paraffin is 1:1. The preparation method of the material comprises the following steps: (1) preparing graphite oxide; (2) preparing the graphene / polyaniline binary complex; (3) preparing the graphene / polyaniline / cobalt ternary complex; (4) weighing graphene / polyaniline / cobalt ternary complex and paraffin, and evenly mixing to obtain a graphene / polyaniline / cobalt wave-absorbing material. The material has the characteristics of being low in cost, simple in preparation technology, strong in electromagnetic wave absorption capability, wide in absorption frequency band, small in density and the like, achieves good electromagnetic property and stability, and has important application values in the fields of microwave absorption and electromagnetic shielding.

Description

Technical field: [0001] The invention belongs to the field of preparation of electromagnetic wave absorbing materials, in particular to a preparation method of a graphene / polyaniline / cobalt novel composite material with wave-absorbing properties. Background technique: [0002] With the development of modern science and technology and the progress of industrial civilization, the application of various electronic instruments and equipment is increasing day by day, which produces more and more electromagnetic radiation, so electromagnetic interference is becoming more and more serious, and it has become a problem for many equipment to function. At the same time, electromagnetic pollution has penetrated into every corner of production and life, seriously affecting people's health. Therefore, how to effectively prevent and eliminate electromagnetic interference has become an important topic in the global scientific and technological circles. [0003] Absorbing materials are requ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08K9/02C08K3/04C08K3/08C08G73/02C09D5/32C09K3/00
CPCC08G73/0266C08L91/06C09D5/32C09K3/00C08L79/02C08K9/02C08K3/04C08K2003/0843
Inventor 范慧俐孙林赵敏
Owner UNIV OF SCI & TECH BEIJING
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