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Flexible magnesium ferrite fiber and preparation method and application thereof

A technology of magnesium ferrite and fiber, applied in fiber treatment, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problems of poor fiber flexibility and easy agglomeration, achieve low cost, overcome easy agglomeration, and good operability Effect

Active Publication Date: 2021-01-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flexible magnesium ferrite fiber prepared by this method not only overcomes the problem of easy agglomeration of magnesium ferrite nanomaterials in the adsorption process, but also solves the problem that the iron source and magnesium source are directly dissolved with spinning aids to form fibers prepared by spinning solution The problem of poor flexibility

Method used

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  • Flexible magnesium ferrite fiber and preparation method and application thereof
  • Flexible magnesium ferrite fiber and preparation method and application thereof
  • Flexible magnesium ferrite fiber and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A kind of preparation method of flexible magnesium ferrite fiber, comprises steps as follows:

[0065] (1) According to the molar ratio of iron ion: citric acid monohydrate=2:3 ratio, weigh 4.0400g ferric nitrate nonahydrate and 3.1500g citric acid monohydrate, add in the mixed solvent of water and ethanol, stir at room temperature Until dissolved, a reddish-brown clear sol A was obtained.

[0066] (2) Add 1.0720 g of magnesium acetate to the sol obtained in step (1), stir and dissolve to obtain light reddish brown sol B.

[0067] (3) Add 0.0300g polyethylene oxide (PEO, with an average molecular weight of 1,000,000) to the sol B obtained in step (2), stir and dissolve at room temperature; mix the mixed solvent of water and ethanol to 14.00g, continue stirring for 0.5h, and prepare A light reddish brown magnesium ferrite precursor spinning solution was obtained.

[0068] (4) Electrospinning the magnesium ferrite precursor spinning liquid obtained in step (3) at a temp...

Embodiment 2

[0075] As described in Example 1, the difference is that in step (2), 0.2015 g of magnesium oxide is weighed and added into the clear sol A obtained in step (1), stirred and dissolved to obtain light reddish brown sol B.

[0076] The parameters of the magnesium ferrite precursor spinning solution prepared in this example are listed in Table 1, and the spinning solution has good spinnability.

[0077] The photo of the khaki magnesium ferrite precursor fiber that the present embodiment makes is as follows figure 1 As shown in (b), brown magnesium ferrite fiber was obtained after heat treatment at 550°C, and its photo is as follows figure 2 (b) shown. Depend on figure 2 (b) shows that the fiber is fluffy and flexible.

[0078] The SEM photos of the magnesium ferrite fibers obtained after heat treatment at 550°C in this example are as follows: image 3 shown by image 3 It can be seen that the flexible magnesium ferrite fiber prepared by the present invention has a fiber di...

Embodiment 3

[0081] A kind of preparation method of flexible magnesium ferrite fiber, comprises steps as follows:

[0082] (1) Weigh 4.0400g of ferric nitrate nonahydrate and add it to 50mL of deionized water, stir and dissolve, add ammonia water dropwise until it is completely precipitated, centrifuge and wash with deionized water to obtain a reddish-brown ferric hydroxide precipitate.

[0083] According to the molar ratio of iron ion: citric acid monohydrate = 2:3, add the ferric hydroxide precipitate prepared in step (1) and 3.1500g citric acid monohydrate to 100mL deionized water, stir at room temperature until dissolved , to obtain a reddish-brown clear sol.

[0084] The obtained clear sol was distilled under reduced pressure at 50 °C until a viscous sol was formed. Dilute the viscous sol with a mixed solvent of water and ethanol to obtain a reddish-brown clear sol A.

[0085] (2) Add 1.0720 g of magnesium acetate to the clear sol A obtained in step (1), stir and dissolve to obtain ...

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Abstract

The invention relates to a flexible magnesium ferrite fiber and a preparation method and application thereof. The diameter of the magnesium ferrite fiber is about 0.5-1.5 microns, and the magnesium ferrite fiber is composed of magnesium ferrite nano-crystals. The preparation method comprises the following steps: dissolving an iron source, a magnesium source and citric acid in a solvent; adding a spinning aid, and adjusting the solvent to certain viscosity to obtain a precursor spinning solution; and carrying out electrostatic spinning to obtain precursor fibers, and obtaining the flexible magnesium ferrite fibers through heat treatment at a certain temperature. According to the flexible magnesium ferrite fiber prepared by the method, the problem that a magnesium ferrite nano material is easy to agglomerate in an adsorption process is solved, and the problem of poor flexibility of the fiber prepared from the spinning solution formed by directly dissolving the iron source and the magnesium source together with the spinning aid is solved. The fiber has excellent flexibility and self-supporting property, does not agglomerate in an aqueous solution, is easy to magnetically separate, andhas excellent adsorption performance on Pb<2+> ions.

Description

technical field [0001] The invention belongs to the technical field of synthetic fibers, and in particular relates to a flexible magnesium ferrite fiber and a preparation method thereof. Background technique [0002] In addition to bringing progress and convenience to human beings, industrial development has also brought enormous pressure to the environment, especially the shortage of water resources. We are currently facing the problem of depletion of groundwater and shortage of fresh water resources. Due to population growth and industrial demands, the demand for fresh water resources is increasing year by year. Followed by the increase in the discharge of polluted water, the problem of water shortage is becoming more and more serious. Purification of pollution, turning waste into treasure, and turning it into reusable resources is the only way at present. Among many water treatment technologies, adsorption is widely used due to its low cost and simple operation. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/10D01F9/08D01D5/00D01D10/02B01J20/04B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/04B01J20/28002B01J20/28023C02F1/281C02F2101/20D01D5/003D01D5/0061D01D5/0092D01D10/02D01F9/08D01F9/10
Inventor 王新强施淑颖朱陆益张光辉许东刘雪松
Owner SHANDONG UNIV
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