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Amidoximized polyacrylonitrile fiber and preparation method and applications thereof

A technology of polyacrylonitrile fiber and polyacrylonitrile, which is applied in chemical instruments and methods, fiber chemical characteristics, inorganic chemistry, etc. It can solve the problems of brittle fracture or powderization, loss of fiber characteristics, and influence on fiber preparation, etc., and achieves simple operation , excellent adsorption performance, and the effect of saving preparation cost and time

Active Publication Date: 2018-11-27
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the current research, some scholars have made polyacrylonitrile into fibers by electrospinning process and then modified them with amidoximation to obtain amidoximated polyacrylonitrile fibers; Amidoximation polyacrylonitrile fibers are obtained by spinning after oximation modification, but this method leads to very serious shrinkage of polyacrylonitrile fibers after modification, and even brittle fracture or powderization, which loses the characteristics of fibers; and polypropylene After amidoximation of nitrile, the viscosity of the spinning solution changes greatly, which affects the preparation of subsequent fibers

Method used

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  • Amidoximized polyacrylonitrile fiber and preparation method and applications thereof
  • Amidoximized polyacrylonitrile fiber and preparation method and applications thereof
  • Amidoximized polyacrylonitrile fiber and preparation method and applications thereof

Examples

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Embodiment 1

[0039] A preparation method of amidoximated polyacrylonitrile fiber, comprising:

[0040]Get polyacrylonitrile (molecular weight is 10 * 10 4 ) was dissolved in N,N-dimethylformamide (DMF), and stirred at room temperature for 10 h to obtain a transparent polyacrylonitrile solution. Dissolve hydroxylamine hydrochloride in N,N-dimethylformamide (DMF), ultrasonically oscillate for 5 minutes, and stir at room temperature for 1 hour, so that hydroxylamine hydrochloride is fully dissolved in DMF to obtain a hydroxylamine hydrochloride solution, wherein the concentration of hydroxylamine hydrochloride is 10g / L.

[0041] The polyacrylonitrile solution and the hydroxylamine hydrochloride solution were mixed, stirred at room temperature for 5 minutes, so that the two solutions were fully mixed, and the bubbles in the solution were removed by ultrasonic vibration to obtain a spinning solution, wherein the mass concentration of polyacrylonitrile was 10%. The molar ratio of polyacryloni...

Embodiment 2

[0044] A preparation method of amidoximated polyacrylonitrile fiber, comprising:

[0045] Get polyacrylonitrile (molecular weight is 8 * 10 4 ) was dissolved in dimethyl sulfoxide (DMSO), and stirred at room temperature for 5 h to obtain a transparent polyacrylonitrile solution. Hydroxylamine hydrochloride was dissolved in dimethyl sulfoxide (DMSO), ultrasonically oscillated for 10 minutes, and then stirred at room temperature for 2 hours, so that hydroxylamine hydrochloride was fully dissolved in DMSO to obtain a hydroxylamine hydrochloride solution, wherein the concentration of hydroxylamine hydrochloride was 30 g / L.

[0046] The polyacrylonitrile solution and the hydroxylamine hydrochloride solution were mixed, stirred at room temperature for 10 minutes, so that the two solutions were fully mixed, and the bubbles in the solution were removed by ultrasonic vibration to obtain a spinning solution, wherein the mass concentration of polyacrylonitrile was 8%. The molar ratio of...

Embodiment 3

[0049] Get polyacrylonitrile (molecular weight is 15 * 10 4 ) was dissolved in N,N-dimethylacetamide, stirred at room temperature for 3 h to obtain a transparent polyacrylonitrile solution. Dissolve hydroxylamine hydrochloride in N,N-dimethylacetamide, ultrasonically oscillate for 5 minutes, and stir at room temperature for 1 hour, so that hydroxylamine hydrochloride is fully dissolved in N,N-dimethylacetamide to obtain a hydroxylamine hydrochloride solution, in which the hydrochloric acid The concentration of hydroxylamine is 20g / L.

[0050] The polyacrylonitrile solution and the hydroxylamine hydrochloride solution were mixed, stirred at room temperature for 15 minutes, so that the two solutions were fully mixed, and the bubbles in the solution were removed by ultrasonic vibration to obtain a spinning solution, wherein the mass concentration of polyacrylonitrile was 15%. The molar ratio of polyacrylonitrile to hydroxylamine hydrochloride is 1:1.25.

[0051] Put the spinnin...

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Abstract

The invention provides a preparation method of an amidoximized polyacrylonitrile fiber. The preparation method includes the following steps: preparing a polyacrylonitrile solution and a first organicsubstance solution, wherein the first organic substance includes an organic substance having a hydroxyl group and an amino group; evenly mixing the polyacrylonitrile solution and the first organic substance solution to prepare a spinning solution, wherein the mass concentration of polyacrylonitrile in the spinning solution is 8%-15%; carrying out electrostatic spinning on the spinning solution at40 DEG C to 60 DEG C to obtain the amidoximized polyacrylonitrile fiber; or carrying out electrostatic spinning on the spinning solution at a temperature greater than or equal to 20 DEG C and less than 40 DEG C, and then carrying out vacuum drying at 60 DEG C to 80 DEG C to obtain the amidoximized polyacrylonitrile fiber. The preparation method provided by the invention is simple in operation. Theamidoximized polyacrylonitrile fiber is prepared by controlling the temperature of the electrostatic spinning, and the prepared amidoximized polyacrylonitrile fiber has excellent metal adsorption properties and reusability.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to amidoximated polyacrylonitrile fiber and its preparation method and application. Background technique [0002] With the development of industry and the wide application of precious metals, the demand for precious metals is increasing day by day, and the recovery of precious metals has become particularly important. At the same time, urban domestic sewage and various mining wastewater contain a large amount of heavy metal ions, which are bioaccumulated through the food chain and pose a serious threat to organisms and human health. Therefore, the removal and recovery of heavy metal ions in sewage is of great significance. Adsorption method is currently recognized as an economical, effective, flexible and simple metal adsorption method. The most important thing in the adsorption method is the adsorbent. Among them, the polyacrylonitrile fiber material has the advantages of small ...

Claims

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Application Information

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IPC IPC(8): D01F6/54D01F1/10B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/265B01J20/28023B01J2220/4812C02F1/285C02F2101/20D01F1/10D01F6/54
Inventor 赫法贵刘陈诗涛杜冰高福沙庆
Owner SHENZHEN UNIV
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