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Preparation method of a self-assembled porous polyaniline/cobalt core-shell spherical structure absorbing material

A spherical structure and wave-absorbing material technology, applied in the field of materials, can solve the problems of poor bonding between cobalt and polyaniline, single loss mechanism, and limited wave-absorbing effect, so as to promote uniform dispersion, enhance electromagnetic wave absorption, and enhance multiple reflections and scattering Effect

Active Publication Date: 2021-05-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, single-component polyaniline absorbing materials have disadvantages such as single loss mechanism and narrow absorbing frequency band.
Although there are some multi-component absorbing materials containing polyaniline at present, for example, the invention application with application number 201310562605.5 discloses a graphene / polyaniline / cobalt composite absorbing material and its preparation method, and the invention application with application number 201210005404.0 is disclosed A kind of expanded graphite / polyaniline / cobalt ferrite wave-absorbing material and its preparation process etc., all have limited wave-absorbing effect due to the poor combination of cobalt and polyaniline, it may be necessary to combine other components (such as graphene) to Improve the absorbing performance and other issues

Method used

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  • Preparation method of a self-assembled porous polyaniline/cobalt core-shell spherical structure absorbing material
  • Preparation method of a self-assembled porous polyaniline/cobalt core-shell spherical structure absorbing material
  • Preparation method of a self-assembled porous polyaniline/cobalt core-shell spherical structure absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This example provides a method for preparing a self-assembled porous polyaniline / cobalt core-shell spherical structure absorbing material:

[0038] Step 1, dissolving aniline in an organic solvent to form an oil phase suspension.

[0039] Specifically, aniline is purified by distillation under reduced pressure, such as figure 1 As shown, then, the purified aniline was dissolved in carbon tetrachloride organic solvent, the concentration of aniline was 0.05mol / L, stirred for 1h, and the stirring speed was 50rpm, to obtain an oil phase suspension with uniform dispersion of aniline.

[0040] Step 2, performing surface modification with a silane coupling agent and nitration surface modification on the cobalt powder to obtain a modified cobalt powder whose surface is rich in amino groups.

[0041] The specific method of modification is:

[0042] Step a. Prepare 50mL mixed solution according to the volume fraction of ethanol: water = 9:1, add 2g of cobalt powder into the sol...

Embodiment 2

[0053] This example provides a method for preparing a self-assembled porous polyaniline / cobalt core-shell spherical structure absorbing material:

[0054] Step 1, dissolving aniline in an organic solvent to form an oil phase suspension.

[0055] Specifically, aniline is purified by distillation under reduced pressure, such as figure 1 As shown, then, the purified aniline was dissolved in carbon tetrachloride organic solvent, the concentration of aniline was 0.5mol / L, stirred for 1h, and the stirring speed was 50rpm, to obtain an oil phase suspension with uniform dispersion of aniline.

[0056] Step 2, performing surface modification with a silane coupling agent and nitration surface modification on the cobalt powder to obtain a modified cobalt powder whose surface is rich in amino groups.

[0057] The specific method of modification is:

[0058] Step a. Prepare 50mL mixed solution according to the volume fraction of ethanol: water = 9:1, add 2g of cobalt powder into the solu...

Embodiment 3

[0069] This example provides a method for preparing a self-assembled porous polyaniline / cobalt core-shell spherical structure absorbing material:

[0070] Step 1, dissolving aniline in an organic solvent to form an oil phase suspension.

[0071] Specifically, aniline is purified by distillation under reduced pressure, such as figure 1 As shown, then, the purified aniline was dissolved in carbon tetrachloride organic solvent, the concentration of aniline was 1mol / L, stirred for 1h, and the stirring speed was 50rpm, to obtain an oil phase suspension with uniform dispersion of aniline.

[0072] Step 2, performing surface modification with a silane coupling agent and nitration surface modification on the cobalt powder to obtain a modified cobalt powder whose surface is rich in amino groups.

[0073] The specific method of modification is:

[0074] Step a. Prepare 50mL mixed solution according to the volume fraction of ethanol: water = 9:1, add 2g of cobalt powder into the soluti...

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Abstract

The invention discloses a preparation method of a self-assembled porous polyaniline / cobalt core-shell spherical structure wave-absorbing material, step 1, dissolving aniline in an organic solvent to form an oil phase suspension; step 2, modifying cobalt powder to obtain The surface is rich in modified cobalt powder with amino groups, even if the surface of the cobalt powder has polyaniline growth sites; Step 3, the modified cobalt powder, gallic acid and ammonium persulfate are dissolved in deionized water to obtain an aqueous phase solution; Step 4 1. Slowly drop the water phase solution into the oil phase suspension to form a self-assembly reaction system, carry out polymerization reaction under heat preservation conditions, and post-process the obtained polyaniline / cobalt core-shell spheres after the reaction. The invention has the advantages of stability, excellent wave-absorbing effect and the like.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a wave-absorbing material, in particular to a preparation method of a self-assembled porous polyaniline / cobalt core-shell spherical structure wave-absorbing material. Background technique [0002] With the continuous development of wireless technology, electromagnetic pollution not only worsens the environment, but also seriously endangers human health. People are paying more and more attention to the harm of electromagnetic radiation and its impact on the public environment. Therefore, electromagnetic wave absorbing materials play an important role in stealth technology and human protection. A good wave-absorbing material requires thin material, light weight, and excellent electromagnetic wave absorption performance. [0003] Polyaniline has the advantages of cheap monomer, easy synthesis, light weight, good conductivity, and potential high-performance electromagnetic wave absorption. It...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C08J9/28B01J19/10B01J13/14
CPCB01J13/14B01J19/10C08G83/001C08J9/286C08J2387/00
Inventor 姚正军雷一鸣周金堂李琳朱华平陆川军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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