A kind of flexible triiron tetroxide fiber and preparation method thereof

Abstract

The invention relates to a flexible ferroferric oxide fiber and a preparation method thereof. The ferric oxide fiber has a diameter of about 0.5-1.5 μm and is composed of ferric oxide nanocrystal grains. The preparation method includes: fully stirring the newly prepared ferric hydroxide and the acid source in water until they are completely dissolved, distilling under reduced pressure until a viscous sol is formed; adding spinning aids, and adjusting to a certain viscosity to obtain a precursor spinning solution; Precursor fibers were obtained by electrospinning, and ferroferric oxide fibers were prepared by pretreatment in an air atmosphere and high-temperature heat treatment in an oxygen-free environment without a reduction step. The invention not only overcomes the problem of poor flexibility of fibers prepared by electrospinning by directly dissolving iron salts in high polymers to form spinning solutions, but also solves the problem of mixing ferric oxide nanoparticles in spinning solutions in the blending spinning method The inhomogeneous and limited dosing of Fe3O4 nanoparticles lead to the problem of low saturation magnetization. The fiber has excellent flexibility, high saturation magnetic susceptibility, and is easy to be separated by an external magnetic field.

Description

technical field [0001] The invention belongs to the technical field of synthetic fibers, and in particular relates to a flexible triiron tetroxide fiber and a preparation method thereof. Background technique [0002] nanometer ferric oxide (Fe 3 o 4 ) is the most widely used magnetic material because of its simple preparation, wide source of iron element, high saturation magnetization at room temperature, non-toxic and harmless, and biocompatibility. It has great application value in magnetic devices, magnetic storage, magnetic fluid, cell separation, protein purification, drug loading and release, etc. Because the separation of solid and liquid phases under the action of an external magnetic field is very simple, and the specific surface area is large, it is also widely used in water treatment. The Fe3O4 fiber not only has the above-mentioned advantages of the Fe3O4 nanoparticles, but also overcomes its shortcoming of being easy to agglomerate. [0003] Mou Fangzhi and ...

AI Technical Summary

Problems solved by technology

The preparation of spinning solution by this method not only overcomes the problem of poor flexibility of fibers prepared by directly dissolving iron salt in high polymer to form spinning solution; Low saturation magnetization due to uneven mixing and limited dosing of Fe3O4 nanoparticles

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