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High-temperature-resistant high-strength polysulfone fiber and preparation method thereof

A fiber and polysulfone technology, which is applied in the field of high temperature resistant and high strength fibers and their preparation, can solve the problems of unstable fiber quality and reduce the heat resistance temperature of materials, and achieve the effects of high mechanical properties, high efficiency and dense fiber structure.

Active Publication Date: 2018-01-26
四川斯派恩新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the formation of fibers in dry spinning mainly depends on the migration of the solvent in the spinning solution to the environment, the residual solvent will have a great impact on the performance of the fiber product; a small amount of residual solvent will not only reduce the heat resistance of the material Temperature, and strength, can also cause instability in fiber quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve PASS in N-methylpyrrolidone to prepare a spinning solution with a concentration of 20%, and expose the spinning solution to an air atmosphere with a relative humidity of 95% at room temperature for 2 minutes after being spun out through a spinneret hole. The flow surface becomes opaque by phase separation to form a microporous structure. Then use microwave heating to increase the temperature of the spinning solution to 80°C, 120°C, 160°C, 200°C, and 240°C, and keep it at each temperature for 5 minutes to gradually evaporate the solvent in the spinning solution completely. Draw to 5 times the length of the original filament; then the formed fiber is slowly cooled to room temperature and wound up. The long-term use temperature of the prepared PASS fiber can reach 215°C, and the tensile strength at room temperature is 3.4g / d.

Embodiment 2

[0022] The m-PSA was dissolved in dimethylacetamide to prepare a spinning solution with a concentration of 18%. After the spinning solution was spun through the spinneret holes, it was exposed to an air atmosphere with a relative humidity of 90% at room temperature and kept for 3 minutes. At this time, The surface of the liquid flow becomes opaque through phase separation to form a microporous structure; then microwave heating is used to raise the temperature of the spinning liquid flow to 100°C, 140°C, 180°C, 220°C, and 260°C, and keep at each temperature for 5 minutes. The solvent in the spinning solution is gradually volatilized completely, and then slowly drawn at 300°C to 10 times the length of the original filament; finally, the formed fiber is slowly cooled to room temperature and wound up. The long-term use temperature of the prepared m-PSA fiber can reach 260°C, and the tensile strength at room temperature is 5.0g / d.

Embodiment 3

[0024] Dissolve PSF in dimethyl sulfoxide to prepare a spinning solution with a concentration of 23%. After the spinning solution is spun through the spinneret holes, it is exposed to an air atmosphere with a relative humidity of 93% at room temperature and kept for 5 minutes. At this time, the liquid flow The surface becomes opaque through phase separation to form a microporous structure; then microwave heating is used to raise the temperature of the spinning liquid flow to 120°C, 160°C, 180°C, 220°C, and 240°C, and keep at each temperature for 5 minutes to spin The solvent in the liquid is gradually evaporated completely, and slowly drawn to 8 times the length of the original filament at 270°C; finally, the formed fiber is slowly cooled to room temperature, and wound up. The long-term use temperature of the prepared PSF fiber can reach 205°C, and the tensile strength at room temperature is 3.0g / d.

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Abstract

The invention relates to the technical field of high polymer materials, in particular to high-temperature-resistant high-strength polysulfone fiber and a preparation method thereof. The polysulfone fiber preparation method comprises the steps that polysulfone materials are dissolved into a solvent to form a spinning solution, a trickle is formed through a spinning nozzle, and a microporous structure is formed on the surface of the trickle; the solvent is removed through heating in a stepped temperature rising mode, micropores disappear through stretching and heating, and the polysulfone fiberis obtained. Accordingly, compared with fiber obtained through a traditional method, the high performance polysulfone fiber has the high mechanical property, thermostability and stability, the safe use temperature of the polysulfone fiber ranges from 205 DEG C to 280 DEG C, and the room temperature tensile strength ranges from 3.0 g / d to 5.0 g / d.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-temperature-resistant high-strength fiber and a preparation method thereof. Background technique [0002] High-temperature-resistant high-strength fibers are widely used in composite material preparation, industrial filtration and other fields. [0003] Polysulfone is a kind of high-performance polymer with aromatic group and sulfone group structure. Due to the strong interaction between molecular chains, this kind of material generally has the characteristics of high melt viscosity and difficult melt spinning. The solution spinning method generally includes two kinds of wet method and dry method, wherein the wet spinning method generally spins the spinning solution directly into the coagulation bath, the solvent in the fine stream of the spinning solution diffuses to the coagulation bath, and the coagulant flows into the coagulation bath. The flow penetrates, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/06D01D5/247D01D10/02D01D5/12D01F6/76
Inventor 王孝军杨杰张刚张美林龙盛如
Owner 四川斯派恩新材料有限公司
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