Method for preparing modified polyacrylonitrile ion exchange fibers with electrostatic spinning method

A technology of electrospinning and modified ions, applied in separation methods, rayon manufacturing, fiber chemical characteristics, etc., can solve problems such as high bulkiness, poor uniformity, and low functional reaction efficiency, and improve production efficiency Effect

Inactive Publication Date: 2018-10-02
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned patent ZL95116025.7, which uses polyacrylonitrile fiber and triethylenetetramine for functionalization reaction to generate ion exchange fiber, has the following disadvantages: due to the high bulkiness of polyacrylonitrile fiber, the efficiency of functionalization reaction is relatively low, At the same time, because the functionalization reaction of polyacrylonitrile fibers is a heterogeneous solid-liquid reaction, the uniformity of the reaction is also poor.

Method used

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  • Method for preparing modified polyacrylonitrile ion exchange fibers with electrostatic spinning method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Preparation of modified polyacrylonitrile electrospinning solution: dissolve polyacrylonitrile in dimethylformamide to prepare a polyacrylonitrile solution with a mass percentage of 5%, stir at room temperature, and add triethylenetetramine (The mass ratio of polyacrylonitrile to triethylenetetramine is 1:5), heated up to 100°C and reacted for 120 minutes, then cooled down and discharged to obtain a modified polyacrylonitrile electrospinning solution.

[0015] (2) Electrospinning step: Add the electrospinning solution prepared in step (1) into the storage tank connected to the electrospinning nozzle, control the spinning voltage to 30KV, and the spinning distance to 20cm to carry out electrospinning, and the static receiving Electrospun ion exchange fibers were collected by the device. After vacuum drying, the exchange capacity of the modified polyacrylonitrile electrospun fiber reached 4.9 mmol / g.

Embodiment 2

[0017] (1) Preparation of modified polyacrylonitrile electrospinning solution: dissolve polyacrylonitrile in dimethylformamide to prepare a polyacrylonitrile solution with a mass percentage of 6%, stir at room temperature, and add diethylenetriamine (The mass ratio of polyacrylonitrile to diethylenetriamine is 1:4), heated up to 100°C and reacted for 120 minutes, cooled down and discharged to prepare modified polyacrylonitrile electrospinning solution.

[0018] (2) Electrospinning step: Add the electrospinning solution prepared in step (1) into the storage tank connected to the electrospinning nozzle, control the spinning voltage to 30KV, and the spinning distance to 20cm to carry out electrospinning, and the static receiving Electrospun ion exchange fibers were collected by the device. After vacuum drying, the exchange capacity of the modified polyacrylonitrile electrospun fiber reaches 5.6 mmol / g.

Embodiment 3

[0020] (1) Preparation of modified polyacrylonitrile electrospinning solution: dissolve polyacrylonitrile in dimethylformamide to prepare a polyacrylonitrile solution with a mass percentage of 8%, stir at room temperature, and add triethylenetetramine (The mass ratio of polyacrylonitrile to triethylenetetramine is 1:3), heated up to 110°C and reacted for 100 minutes, then cooled down and discharged to obtain a modified polyacrylonitrile electrospinning solution.

[0021] (2) Electrospinning step: Add the electrospinning solution prepared in step (1) into the storage tank connected to the electrospinning nozzle, control the spinning voltage to 25KV, and the spinning distance to 20cm, and carry out electrospinning, and the static receiving Electrospun ion exchange fibers were collected by the device. After vacuum drying, the exchange capacity of the modified polyacrylonitrile electrospun fiber reaches 4.7mmol / g.

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Abstract

The invention discloses a method for preparing modified polyacrylonitrile ion exchange fibers with an electrostatic spinning method and belongs to the technical field of preparation methods of chemical fiber materials. According to the method, polyacrylonitrile is subjected to functional modification firstly, and the ion exchange fibers are directly prepared through electrostatic spinning. The method comprises following steps: polyacrylonitrile is dissolved in a dimethyl formamide solution, triethylene tetramine or diethylenetriamine is added by stirring, a reaction is performed, a modified polyacrylonitrile electrostatic spinning solution is prepared and subjected to electrostatic spinning by an electrostatic spinning device, and the modified polyacrylonitrile electrostatic spinning fibers with the ion exchange function are obtained. The technology is simple, the production efficiency of functional modification of polyacrylonitrile is improved, and uniformity of the ion exchange fibers is improved.

Description

technical field [0001] The invention belongs to the technical field of manufacturing methods of chemical fiber materials, in particular to a method for preparing modified polyacrylonitrile fibers, in particular to a method for preparing modified polyacrylonitrile ion exchange fibers by electrostatic spinning. Background technique [0002] Ion exchange fiber is a new type of adsorption and separation functional fiber material, which belongs to one of the rapidly developing high-tech. Compared with ion exchange resin, ion exchange fiber material has the characteristics of high exchange capacity, large effective specific surface area and fast exchange speed. . Compared with ion exchange resins, ion exchange fibers have obvious reaction kinetic advantages, and can adsorb and separate harmful gases under gas phase conditions. Patent ZL95116025.7 prepared ion-exchange fibers capable of absorbing acidic gases by grafting triethylenetetramine on acrylic fibers; patents CN2008100978...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F1/10B01D53/02
CPCB01D53/02B01D2257/2047B01D2257/302B01D2257/304D01F1/10D01F6/54
Inventor 梁志宏梁雅辉路德成
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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