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Method for preparing polyaniline/ferroferric oxide electromagnetic composite material

An electromagnetic composite material and a technology of ferric tetroxide, which is applied in the field of preparation of polyaniline/iron tetroxide electromagnetic composite materials, can solve the problems of complex synthesis method, easy falling off of magnetic particles, complicated synthesis process, etc. The effect of good magnetic properties, good conductivity stability and simple synthesis process

Inactive Publication Date: 2014-03-05
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis method is relatively complicated, which is not conducive to industrial production
Chinese patent 201310097325.1 reports a preparation method of electromagnetic composite hollow microspheres. First, polystyrene microspheres are prepared and dispersed in concentrated sulfuric acid for sulfonation, and then mixed with the prepared Fe3O 4The nanoparticle suspension is polymerized in a specific solution, and the resulting product solves the problems of poor conductivity, high density and easy fall-off of magnetic particles in the existing composite hollow materials, and the conductivity of the hollow microspheres is 0.01-1.0S / cm
The synthesis process of this invention is relatively complicated, and the waste liquid produced in the experiment is more difficult to handle

Method used

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  • Method for preparing polyaniline/ferroferric oxide electromagnetic composite material
  • Method for preparing polyaniline/ferroferric oxide electromagnetic composite material
  • Method for preparing polyaniline/ferroferric oxide electromagnetic composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0013] 10g 1-carboxymethyl-3-methylimidazole hydrochloride ionic liquid, 0.0004mol FeCl 3 ·6H 2 O, 0.0003mol FeCl 2 ·3H 2 Mix O with 20ml of deionized water, stir at 0~40°C until fully dissolved, then heat up to 95°C, add 0.0655mol NaOH until the pH value of the mixed solution is greater than 10, and continue the constant heat reaction for 1h. After the reaction is completed, the solution is ultrasonically 10 min and cooled to room temperature. Dissolve 0.0309mol of sulfamic acid and 0.0220mol of aniline monomer into 30ml of deionized water, add to the above-mentioned mixed solution, stir vigorously for 30min at normal temperature and pressure, then add 10ml of hydrochloric acid solution containing 0.218mol of ammonium persulfate (the concentration of hydrochloric acid is 1mol / l), stirred and reacted for 4 hours; the reaction solution was filtered and washed until the filtrate was neutral; finally, the filter cake was vacuum-dried at 40°C and crushed to obtain a dark green ...

Embodiment 2

[0015] 5g 1-carboxymethyl-3-methylimidazole hydrochloride ionic liquid, 0.0004mol FeCl 3 ·6H 2 O, 0.0003mol FeCl 2 ·3H 2 Mix O with 20ml of deionized water, stir at 0~40°C until fully dissolved, then heat up to 95°C, add 0.0655mol NaOH until the pH value of the mixed solution is greater than 10, and continue the constant heat reaction for 1h. After the reaction is completed, the solution is ultrasonically 10 min and cooled to room temperature. Dissolve 0.0409mol of sulfamic acid and 0.0220mol of aniline monomer into 30ml of deionized water, add to the above mixed solution, stir vigorously at normal temperature and pressure for 30min, then add 10ml of hydrochloric acid solution containing 0.218mol of ammonium persulfate (the concentration of hydrochloric acid is 1mol / l), stirred and reacted for 4 hours; the reaction solution was filtered and washed until the filtrate was neutral; finally, the filter cake was vacuum-dried at 40°C and crushed to obtain a dark green conductive ...

Embodiment 3

[0017] 5g 1-carboxymethyl-3-methylimidazole hydrochloride ionic liquid, 0.0008mol FeCl 3 ·6H 2 O, 0.0006mol FeCl 2 ·3H 2 Mix O with 20ml of deionized water, stir at 0~40°C until fully dissolved, then heat up to 95°C, add 0.0457mol NaOH until the pH value of the mixed solution is greater than 10, continue the constant heat reaction for 1h, and after the reaction is completed, the solution is ultrasonically 10 min and cooled to room temperature. Dissolve 0.0440mol of sulfamic acid and 0.0220mol of aniline monomer into 30ml of deionized water, add to the above mixed solution, stir vigorously for 30min at normal temperature and pressure, then add 10ml of hydrochloric acid solution containing 0.218mol of ammonium persulfate (the concentration of hydrochloric acid is 1mol / l), stirred and reacted for 4 hours; the reaction solution was filtered and washed until the filtrate was neutral; finally, the filter cake was vacuum-dried at 40°C and crushed to obtain a dark green conductive ...

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Abstract

The invention discloses a method for preparing a polyaniline / ferroferric oxide electromagnetic composite material. The method comprises the following steps: firstly, synthesizing a ferroferric oxide nano material in an ionic liquid, then, mixing aniline monomer and a doping agent with deionized water, uniformly mixing the components, slowly dropwise adding an oxidant solution into the mixed solution, and reacting to obtain polyaniline / ferroferric oxide black green electromagnetic composite material powder. In the preparation method, ferroferric oxide ferrofluid is synthesized by a chemical coprecipitation method, the electromagnetic composite material is synthesized by an in situ polymerization method, the synthesis process is simple and easy to operate, the ionic liquid is used as a green chemical solvent to be applied in the whole synthesis process, and the magnetism and electrical conductivity of the synthesized electromagnetic composite material are good, so that the electromagnetic composite material can be applied in such fields as electromagnetic shielding, microwave absorption, stealth coating and the like.

Description

technical field [0001] The invention relates to a preparation method of a conductive material, in particular to a preparation method of a polyaniline / triiron tetroxide electromagnetic composite material using sulfamic acid as a dopant. Background technique [0002] As one of the conductive polymer materials, polyaniline is considered to be the structural conductive polymer with the most commercial application value because of its good chemical stability, good weather resistance, cheap and easy-to-obtain raw materials, simple synthesis method, and electrical conductivity. There is a huge market demand in fields such as biosensors, anti-corrosion materials, and wave-absorbing materials. However, the low conductivity of polyaniline and the difficulty of post-processing have greatly affected its popularization and application. Therefore, it is an effective way to improve its poor processing performance and increase its additional properties through composite modification techno...

Claims

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Application Information

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IPC IPC(8): C08G73/02C08K3/22
Inventor 冯辉霞陈姣王果张永臣谭琳陈娜丽
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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