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Method for preparing polyacrylonitrile nano-fibers by circulation and coaxial electrospinning of surface active agent solution

A technology of surfactant and coaxial electrospinning, which is applied in fiber treatment, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of high surface tension and insufficient formation of high-quality nanofibers, and achieve uniform distribution, small diameter, The effect of simple preparation process

Inactive Publication Date: 2013-11-06
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has a good effect on solving the clogging of the spinning head, due to the physical and chemical properties of pure organic solvents such as high surface tension, there are still deficiencies in the formation of high-quality nanofibers.

Method used

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  • Method for preparing polyacrylonitrile nano-fibers by circulation and coaxial electrospinning of surface active agent solution
  • Method for preparing polyacrylonitrile nano-fibers by circulation and coaxial electrospinning of surface active agent solution
  • Method for preparing polyacrylonitrile nano-fibers by circulation and coaxial electrospinning of surface active agent solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1:: the single spinning of 14%w / v (mass volume ratio) polyacrylonitrile (PAN)

[0022] A flattened stainless steel injection needle (inner diameter 0.3 mm) was used as the metal conduit 3 for spraying thin streams, connected to a high-voltage power supply (ZGF2000, Shanghai Sute Electric Co., Ltd.), and the flow of the core / sheath fluid was passed through an axial flow syringe pump (Cole- Parmer ∞ company) to regulate, nanofiber adopts fiber receiving plate 6 to receive.

[0023] Disperse 14.0g of PAN powder in 100ml of N,N-dimethylformamide (DMF) at room temperature, then shake overnight in a constant temperature shaker at 50°C to prepare a yellow translucent spinning solution, which is High-voltage electrospinning was performed to prepare nanofibrous membranes. Other process parameters are as follows: the flow rate is 1.0mL / h, the distance between the receiving plate and the spinneret is 15cm, and the voltage is 12kV. The ambient temperature is (23±1)°C,...

Embodiment 2

[0025] Embodiment 2: With the N,N-dimethylformamide solution of 4% w / v nonionic surfactant Triton X-100 as the sheath fluid, the surfactant solution circulation is carried out through two single-channel axial flow syringe pumps. Preparation of PAN Fibers by Axial Electrospinning

[0026] With the N,N-dimethylformamide solution of 4%w / v nonionic surfactant Triton X-100 as the sheath fluid, the PAN solution in Example 1 as the core fluid, using such as figure 1 A self-assembled coaxial spinning head was used to prepare PAN fibers by coaxial electrospinning with surfactant solution circulation, and the core / sheath liquid flow was regulated by two single-channel axial flow syringe pumps. The specific parameters of other process conditions are: the sheath / core liquid flow rate is 0.4 / 2mL / h, the distance between the receiving plate and the spinneret is 15cm, and the voltage is 12kV. The ambient temperature is (23±1)°C, and the ambient humidity is 62±4%.

[0027] Field scanning ele...

Embodiment 3

[0028] Embodiment 3: With the N,N-dimethylformamide solution of 1% w / v nonionic surfactant Triton X-100 as the sheath fluid, the surfactant solution was circulated simultaneously through two single-channel axial flow syringe pumps. Preparation of PAN Fibers by Axial Electrospinning

[0029] The N,N-dimethylformamide solution of 1% w / v nonionic surfactant Triton X-100 is used as the sheath liquid, and the others are the same as in Example 2, and the surfactant solution is prepared by two single-channel axial flow syringe pumps. PAN fibers were prepared by circulating coaxial electrospinning.

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Abstract

The invention discloses a method for preparing polyacrylonitrile nano-fibers by circulation and coaxial electrospinning of a surface active agent solution. Self-assembly coaxial spinning heads are adopted for electrospinning. The method is characterized in that outer sheath fluid for coaxial electrospinning is the surface active agent solution. A surface active agent comprises cationic, anionic and nonionic surface active agents dissolved in N,N-dimethylformamide, N,N-dimethylacetylamide or dimethylsulfoxide. The concentration of the surface active agent is 1%-6% (w / v). According to the method, the preparation process is simple, the prepared polyacrylonitrile nano-fibers are not only small in diameter and uniform in distribution, but also low in diameter dispersion factor and smooth in surface, and the defects that the spinning process is interrupted due to the easy blockage of the spinning head, the produced polymer nano-fibers are poor in quality, and the like in the prior art can be overcome.

Description

technical field [0001] The invention relates to a method for preparing high-quality polyacrylonitrile nanofibers by circulating coaxial electrospinning with a surfactant solution, and relates to the technical field of polymer superfine fibers preparation. Background technique [0002] Polyacrylonitrile (PAN) nanofibers are widely used in biomedicine, superabsorbent resin, catalyst carrier, ion exchange resin, pollution control, antibacterial and deodorizing, solid polymer, electrolyte, filtration and separation, etc. And using polyacrylonitrile PAN precursor as raw material, PAN-based carbon fiber can be obtained after oxidation stabilization, carbonization, graphitization and post-treatment. Because of its carbon content of more than 90% and its structural characteristics similar to microcrystalline polycyclic aromatics, it has become a high-performance composite material with good heat resistance, light weight, high tensile strength and high Young's modulus. Fiber, but th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/18D01F1/00D01D5/00
Inventor 余灯广王霞杨俊和杨光智廖耀祖白冠宁
Owner UNIV OF SHANGHAI FOR SCI & TECH
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