Flexible ferroferric oxide fibers and preparation method thereof

A technology of ferric oxide and ferric hydroxide, which is applied in the field of synthetic fibers, can solve the problems of uneven mixing of ferric oxide nanoparticles, limited dosing of ferric ferric oxide nanoparticles, and low saturation magnetization. The effect of poor flexibility, high saturation magnetization, and uniform distribution

Active Publication Date: 2019-07-09
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 dissolvi...

Method used

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  • Flexible ferroferric oxide fibers and preparation method thereof
  • Flexible ferroferric oxide fibers and preparation method thereof
  • Flexible ferroferric oxide fibers and preparation method thereof

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Embodiment Construction

[0009] Technical scheme of the present invention is as follows:

[0010] A kind of preparation method of flexible ferroferric oxide fiber, comprises steps as follows:

[0011] (1) Weigh ferric salt and add it to deionized water, stir and dissolve, add dropwise alkaline solution until it is completely precipitated, centrifuge the precipitate and wash it with deionized water to prepare ferric hydroxide precipitate;

[0012] (2) According to the molar ratio of iron ion:acid source=1:1~3, weigh the newly prepared ferric hydroxide and acid source in step (1) respectively, add them into water at a temperature of 25~90°C and stir to react Dissolve and stir for 12-24 hours to obtain a clear solution;

[0013] (3) distilling the clear solution prepared in step (2) at 30-80°C under reduced pressure until a viscous sol is formed;

[0014] (4) adding a spinning aid to the sol obtained in step (3), and adjusting the viscosity with a solvent, stirring and dissolving at a temperature of 25...

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Abstract

The invention relates to flexible ferroferric oxide fibers and a preparation method thereof. The diameter of the ferroferric oxide fibers is about 0.5-1.5 mu m, and the ferroferric oxide fibers consist of ferroferric oxide nanocrystalline grains. The preparation method comprises the following steps: fully stirring newly prepared ferric hydroxide and an acid source in water until the newly preparedferric hydroxide and the acid source are completely dissolved, and distilling under reduced pressure until a viscous sol is formed; adding a spinning aid, and adjusting to a certain viscosity to obtain a precursor spinning solution; obtaining precursor fibers through electrostatic spinning, and preparing the ferroferric oxide fibers through pretreatment in an air atmosphere and high-temperature heat treatment in an oxygen-free environment without a reduction step. The problem of poor flexibility of fibers prepared by directly dissolving iron salt in high polymer to form a spinning solution and then carrying out electrostatic spinning is solved, furthermore, the problems of uneven mixing of ferroferric oxide nanoparticles in the spinning solution and low saturation magnetization caused bylimited mixing amount of the ferroferric oxide nanoparticles in a blending spinning method are solved. The fibers are excellent in flexibility, high in saturation magnetic susceptibility and easy to separate 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 ...

Claims

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Application Information

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IPC IPC(8): D01F9/08
CPCD01F9/08
Inventor 王新强施淑颖许东朱陆益张光辉刘雪松
Owner SHANDONG UNIV
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