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Coaxial centrifugal spinning device and method

A technology of centrifugal spinning and centrifugal devices, applied in textiles and papermaking, filament/thread forming, fiber processing, etc., can solve the problems of imperfect technology, complicated equipment, high cost, etc.

Inactive Publication Date: 2016-12-14
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods still have defects such as insufficient technology, complicated equipment, high cost, and difficulties in commercial production.

Method used

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  • Coaxial centrifugal spinning device and method
  • Coaxial centrifugal spinning device and method
  • Coaxial centrifugal spinning device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A certain amount of polyvinylpyrrolidone (PVP) with an average molecular weight of 1.5 million is dissolved in absolute ethanol, and mechanically stirred to completely dissolve the PVP to obtain a PVP ethanol solution with a mass fraction of 15-25% as the inner layer spinning solution; Dissolve a certain amount of polyacrylonitrile (PAN) with a weight average molecular weight of 150,000 in a mixed solution of a certain amount of N,N-dimethylformamide (DMF) and acetone at a mass ratio of 4:1, mechanically Stir to completely dissolve the PAN to obtain a PAN solution with a mass fraction of 10-20% as the outer layer spinning solution. Inject the inner and outer spinning solutions into the inner and outer centrifuge tubes respectively, the inner and outer diameters of the inner spinning needles 10 are 0.41mm and 0.7mm respectively, and the inner and outer diameters of the outer spinning needles 9 are respectively 0.84mm and 1.26mm; Adjust the rotational speed of the centrif...

Embodiment 2

[0041] Dissolve a certain amount of polyvinylpyrrolidone (PVP) with an average molecular weight of 1.5 million in absolute ethanol, and mechanically stir to completely dissolve the PVP to obtain a PVP ethanol solution with a mass fraction of 10--20% as the inner layer spinning solution ; A certain amount of polyvinylidene fluoride (PVDF) with a weight average molecular weight of 250,000 is dissolved in a mixed solution of a certain amount of N,N-dimethylformamide (DMF) and acetone in a mass ratio of 4:1 , Mechanical stirring to completely dissolve the PVDF to obtain a PVDF solution with a mass fraction of 15-25% as the outer layer spinning solution. Inject the inner and outer spinning solutions into the inner and outer centrifuge tubes respectively. The inner and outer diameters of the inner spinning needles are 0.3mm and 0.6mm respectively, and the inner and outer diameters of the outer spinning needles are respectively 0.8mm and 1.2mm; The rotation speed of the device is 500...

Embodiment 3

[0043] Dissolve a certain amount of polyacrylonitrile (PAN) with a weight average molecular weight of 150,000 in a mixed solution of a certain amount of N,N-dimethylformamide (DMF) and acetone at a mass ratio of 4:1, mechanically Stir to dissolve PAN completely, and obtain a PAN solution with a mass fraction of 5%-10%, as an inner layer spinning solution; dissolve a certain amount of polymethyl methacrylate (PMMA) with a weight average molecular weight of 110,000 in a certain amount N,N-dimethylformamide (DMF) and distilled water are mixed in the mixed solution of mass ratio 4:1, and mechanical stirring makes PMMA dissolve completely, obtains the PMMA solution that mass fraction is 10-20%%, as external layer spinning solution. Inject the inner and outer spinning solutions into the inner and outer centrifuge tubes respectively, the inner and outer diameters of the inner spinning needles are 0.4mm and 0.7mm respectively, and the inner and outer diameters of the outer spinning ne...

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Abstract

The invention discloses a coaxial centrifugal spinning device and method. The device comprises a direct-current motor, a supporting device, a spinning support, coaxial centrifuge tubes, spinning needle heads and a receiving device, wherein the direct-current motor is fixed to the supporting device, the spinning support is directly and fixedly connected with an output shaft of the direct-current motor, the coaxial centrifuge tubes are fixed to the spinning support, and under the action of the direct-current motor, the spinning support drives the coaxial centrifuge tubes to rotate at high speed; each coaxial centrifuge tube comprises an outer layer centrifuge tube and an inner layer centrifuge tube, each spinning needle head comprises an outer layer needle head and an inner layer needle head, during spinning, a spinning solution or melt in the outer layer centrifuge tubes and the inner layer centrifuge tubes is tossed out under the action of centrifuge force, an outer layer solution wraps an inner layer solution, and superfine fiber of a skin-core structure is formed due to centrifuge force drafting, solvent volatilization and phase separation. The coaxial centrifugal spinning device is simple, high in spinning speed and production efficiency and capable of producing coaxial superfine fiber on a large scale.

Description

technical field [0001] The invention relates to a coaxial centrifugal spinning device and method for preparing coaxial fibers, belonging to the technical field of textiles and new materials, in particular, the spinning solution is thrown out at high speed from a coaxial centrifuge tube nested with each other, and the outer layer The solution coats the inner layer solution, and after the solvent is volatilized, ultrafine coaxial fibers are formed. Background technique [0002] The coaxial fiber is also a fiber with a skin-core structure, that is, a high polymer acts as the core layer, and the outer layer is covered with another high polymer as the skin layer. The fiber of this structure is due to the high height of the skin layer and the core layer. Different types of polymers often have many unique properties. Such as fibers with special materials as the core, such as X-ray absorbing fibers, infrared absorbing fibers, conductive fibers, optical fibers, etc. Fibers with spe...

Claims

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Application Information

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IPC IPC(8): D01D5/18D01D5/34D01D13/00
CPCD01D5/18D01D5/34D01D13/00
Inventor 夏磊程博闻西鹏
Owner TIANJIN POLYTECHNIC UNIV
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