Preparation method for polyaniline/ferroferric oxide compound with nucleus-shell structure

Abstract

The invention discloses a preparation method for polyaniline / ferroferric oxide compound with nucleus-shell structure, which comprises the steps as follows: a, 1.5-2.5 portions of polyethylene glycol and 1 portion of tetrahydrate ferrous chloride are respectively dissolved into water and mixed to obtain hydrosol; the pH value of the hydrosol is adjusted to 12.0-13.0, then 0.05 portion of hydrogen peroxide is added to stir and react for 4h under 55-65 DEG C to obtain water-based ferrofluid dispersed with polyaniline / ferroferric oxide grains; b, ammonium persulfate is added into the water-based ferrofluid to stir and stew for 8-32h so as to complete the absorption of a colloid shell on the ammonium persulfate; c, aniline monomer is added into the water-based ferrofluid after the step b and stewed for 5h under an ice-bath condition of 0-5 DEG C, washed and filtered to obtain a solid object; d, the solid object is dried under a temperature of 40-50 DEG C, thus obtaining the polyaniline / ferroferric oxide compound. The method is easy to control the components and micro morphology of the compound; moreover, the wave absorption substance content in the compound is high and the wave absorption performance is good.

Description

technical field [0001] The invention relates to a preparation method of a composite, in particular to a preparation method of a composite with a core-shell structure composed of polyaniline conductive macromolecule and ferroferric oxide magnetic particles. Background technique [0002] Polyaniline (PANI) is a conductive polymer with a conjugated structure. It has electromagnetic properties such as simple synthesis process, high temperature resistance, good environmental stability, and excellent electrical conductivity. It can be widely used in sensors, light-emitting electronic devices and anti-corrosion devices. Electromagnetic materials and devices such as static electricity. Due to its light weight advantages and its ability to generate large electrical losses in electromagnetic fields, polyaniline has also been widely used in the field of wave-absorbing materials. Ferric oxide (Fe 3 o 4 ) is a ferrimagnetic material that can be used in the development of magnetic liqu...

AI Technical Summary

Problems solved by technology

[0006] In this method, through the templating effect of emulsifiers such as SDBS, although the aniline monomer can be distributed with Fe 3 o 4 The emulsifier micelles of the particles are polymerized in the confinement template, but because of the polymerization reaction is not necessarily in the Fe 3 o 4 particle surface, thus necessarily leading to a certain proportion of Fe 3 o 4 The particles are distributed outside the PANI molecular chain, which affects the effect of the PANI molecular chain on Fe in the final product. 3 o 4 Particle Wrapping Effect

And because in the latex particle product that this obtains by emulsion polymerization mode, SDBS and PANI, Fe 3 o 4 The particles are built together into latex particles, which cannot be removed by SDBS

That is to say, the final product contains a relatively high content of SDBS impurities that do not have a wave-absorbing function, and its wave-absorbing performance is limited

[0007] It can be seen from the above analysis that the existing preparation of core-shell structure PANI / Fe 3 o 4 The compound method has obvious technical weaknesses in the controllability of product synthesis or the content and performance of absorbing substances in the product.

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