Porous polyacrylonitrile fibers and preparation method and application thereof

A technology of polyacrylonitrile fiber and polyacrylonitrile, which is applied in the fields of fiber chemical characteristics, chemical instruments and methods, textiles and papermaking, etc., can solve the problems of complex operation steps, high experimental temperature requirements, long time consumption, etc., and achieves a sample preparation method. Simple, widely applicable, time-saving effect

Inactive Publication Date: 2017-06-27
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the first preparation method is mainly aimed at electrospinning, and the time period for preparing fibers by electrospinning is long, the fiber diameter cannot be well controlled. The second preparation method requires high experimental temperature, high cost, and long time consumption. The preparation method has the problems of high requirements on the experimental temperature and humidity, and poor operability
[0004] The Chinese invention patent document with the publication number CN 102493009A discloses a method for preparing porous nanofibers. Porous nanofibers are obtained by emulsion electrospinning, but the emulsion system is an unstable system, and phase separation may occur during standing or static spinning , and when preparing polymer emulsions, the operation steps are complicated, and the system requires a large amount of surfactants, and the surfactants are sodium dodecylsulfonate and sodium dodecylbenzenesulfonate with metal ions, which may cause Contaminate the fiber, thus affecting the performance of the fiber

Method used

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  • Porous polyacrylonitrile fibers and preparation method and application thereof
  • Porous polyacrylonitrile fibers and preparation method and application thereof
  • Porous polyacrylonitrile fibers and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Dissolve acrylonitrile-itaconic acid binary copolymer in dimethyl sulfoxide to obtain a mixed solution with a mass fraction of 20%, and add polyvinylpyrrolidone to make a spinning solution; wherein, polyvinylpyrrolidone The dosage is 20% of the mass of acrylonitrile-itaconic acid binary copolymer;

[0035] (2) Extrude the spinning solution at 50°C, enter into water with a temperature of 50°C and solidify for 300 seconds to make fibers;

[0036] (3) The fibers obtained in step (2) were vacuum-dried at 60°C for 180 minutes to obtain porous polyacrylonitrile fibers.

[0037] The nitrogen adsorption-desorption curve of gained porous polyacrylonitrile fiber is as follows figure 1 As shown, the specific surface area of ​​the porous polyacrylonitrile fiber is 110m 2 / g. The SEM figure of gained porous polyacrylonitrile fiber surface is as follows figure 2 As shown, the SEM image of the obtained porous polyacrylonitrile fiber section is as follows image 3 As can be s...

Embodiment 2

[0039] (1) Dissolve acrylonitrile-itaconic acid binary copolymer in dimethyl sulfoxide to obtain a mixed solution with a mass fraction of 20%, and add polyvinylpyrrolidone to make a spinning solution; wherein, polyvinylpyrrolidone The dosage is 20% of the mass of acrylonitrile-itaconic acid binary copolymer;

[0040] (2) Extrude the spinning solution at 60°C, enter into water with a temperature of 60°C and solidify for 300 seconds to make fibers;

[0041] (3) The fibers obtained in step (2) were vacuum-dried at 60°C for 180 minutes to obtain porous polyacrylonitrile fibers.

[0042] The nitrogen adsorption-desorption curve of gained porous polyacrylonitrile fiber is as follows Figure 4 As shown, the specific surface area of ​​the porous polyacrylonitrile fiber is 96m 2 / g.

Embodiment 3

[0044] (1) Dissolve acrylonitrile-itaconic acid binary copolymer in dimethyl sulfoxide to obtain a mixed solution with a mass fraction of 20%, and add polyvinylpyrrolidone to make a spinning solution; wherein, polyvinylpyrrolidone The dosage is 20% of the mass of acrylonitrile-itaconic acid binary copolymer;

[0045] (2) Extruding the spinning solution at 60°C, entering into an aqueous dimethyl sulfoxide solution with a temperature of 60°C and a mass fraction of 10 wt%, and coagulating for 300 seconds to form fibers;

[0046] (3) The fibers obtained in step (2) were vacuum-dried at 60°C for 180 minutes to obtain porous polyacrylonitrile fibers.

[0047] The nitrogen adsorption-desorption curve of gained porous polyacrylonitrile fiber is as follows Figure 5 As shown, the specific surface area of ​​the porous polyacrylonitrile fiber is 95m 2 / g.

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Abstract

The invention discloses porous polyacrylonitrile fibers and a preparation method and application thereof. The porous polyacrylonitrile fibers which are controllable in diameter and have nanohole structures can be prepared by taking a ternary system of polyacrylonitrile, dimethyl sulfoxide and a pore-foaming agent as a spinning liquid by means of a wet process spinning method. The method disclosed by the invention is simple to operate and low in cost, and can obtain porous polyacrylonitrile fibers with the pore structures on the surface and inside. The porous polyacrylonitrile fibers have a wide application in the field of catalysis and adsorption.

Description

technical field [0001] The invention belongs to the technical field of porous fiber preparation, and in particular relates to a porous polyacrylonitrile fiber and its preparation method and application. Background technique [0002] Porous fiber has the characteristics of large specific surface area, high porosity, and good engineering compatibility. It is a material widely used in the fields of catalysis, selective adsorption, host / assistant carrier, biomedical, and optoelectronic materials. [0003] At present, there are three main methods for the preparation of porous fibers. The first is to blend and dissolve two incompatible polymers in a certain proportion in a co-solvent for spinning. When the solvent volatilizes, the two polymers undergo phase separation to form fibers with a bicontinuous phase structure, and then select Porous fibers can be obtained by permanently removing one of the phases; the second is to first blend and spin two incompatible polymers into fiber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/38B01J31/06B01J35/06B01J20/26B01J20/30
CPCB01J20/264B01J31/06B01J35/06D01F6/38
Inventor 王雪飞王燕菲张永刚钱鑫
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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