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Gel spinning solution of polyacrylonitrile-based carbon fiber precursor without skin-core structure and preparation thereof

A polyacrylonitrile-based carbon fiber and gel spinning technology, which is applied to the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems such as gel spinning dope that has not yet been seen, and achieve good economic benefits, uniform structure on the outside and inside, and solve the problem. high cost effect

Inactive Publication Date: 2011-08-31
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there has been no relevant literature report on the gel spinning stock solution suitable for preparing polyacrylonitrile-based carbon fiber precursors without sheath-core structure

Method used

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  • Gel spinning solution of polyacrylonitrile-based carbon fiber precursor without skin-core structure and preparation thereof
  • Gel spinning solution of polyacrylonitrile-based carbon fiber precursor without skin-core structure and preparation thereof
  • Gel spinning solution of polyacrylonitrile-based carbon fiber precursor without skin-core structure and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 2.5 grams of water and 197.5 grams of DMSO and mix them uniformly to make a mixed solvent; weigh 50 grams of polyacrylonitrile polymer, add it to the mixed solvent prepared above, and stir evenly at room temperature; put the solution prepared above at a temperature of 50 ° C Swell at 70°C for 6 hours with stirring; dissolve at 70°C for 4 hours with stirring, keep at 70°C for 3 hours, filter, and defoam to obtain spinning dope. The gel temperature of the polyacrylonitrile stock solution was determined to be 26° C. by using a rheometer. The spinning dope can quickly form a gel at this temperature.

Embodiment 2

[0026] Weigh 5 grams of water and 195 grams of DMSO and mix them uniformly to make a mixed solvent; weigh 50 grams of polyacrylonitrile polymer, add it to the mixed solvent prepared above, and stir evenly at room temperature; put the solution prepared above at a temperature of 50 ° C Swell at 70°C for 6 hours with stirring; dissolve at 70°C for 4 hours with stirring, keep at 70°C for 3 hours, filter, and defoam to obtain spinning dope. The gel temperature of the polyacrylonitrile stock solution measured by a rheometer is 32° C., and the spinning stock solution can quickly form a gel at this temperature.

Embodiment 3

[0028] Weigh 7.5 grams of water and 192.5 grams of DMSO and mix them uniformly to make a mixed solvent; weigh 50 grams of polyacrylonitrile polymer, add it to the mixed solvent prepared above, and stir evenly at room temperature; put the solution prepared above at a temperature of 50 ° C Swell at 70°C for 6 hours with stirring; dissolve at 70°C for 4 hours with stirring, keep at 70°C for 3 hours, filter, and defoam to obtain spinning dope. The gel temperature of the polyacrylonitrile stock solution was determined to be 41° C. by rheometer. The spinning dope can quickly form a gel at this temperature.

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Abstract

The invention relates to a gel spinning solution of polyacrylonitrile-based carbon fiber precursor without skin-core structure, comprising the following ingredients: water or alcohol compound, polyacrylonitrile and organic solvent with mass ratio of 1:1-50:5-150; the preparation method comprises the following steps: water or alcohol compound is dissolved in organic solvent, polyacrylonitrile is added, and then the mixture is stirred and is dispersed uniformly at normal temperature; and then the solution is swelled for 2-6 hours, the temperature is raised to 60-80 DEG C, and then the mixture is stirred continuously, and finally, the mixture is placed still at constant temperature of 60-80 DEG C for 2-10 hours, and then filtration and still defoaming are carried out, so as to prepare the polyacrylonitrile gel spinning solution; the gel spinning solution reduces the gel temperature for gel spinning, simplifies the spinning process, reduces the process cost, has good economic benefit and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of spinning stock solution of polyacrylonitrile-based carbon fiber precursor and its preparation, and in particular relates to a gel spinning stock solution of polyacrylonitrile-based carbon fiber precursor without sheath-core structure and its preparation. Background technique [0002] High-performance polyacrylonitrile-based carbon fiber (PANCF), known as "the dream material of the future material revolution", has a unique structure and integrates many excellent properties. In terms of the national destiny of our country and the rise of the GDP of the national economy, it has increasingly become an indispensable major strategic position: not only the light weight, small size, multi-function and high precision of the new generation of weapons, but also the leapfrogging of strategic weapons under research and pre-research It has been widely used in the pillar industries of civil fields such as aircraft, energy, and co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/20C08K5/05C08J3/09D01F9/22
Inventor 秦宗益潘鼎马彩霞翟光照范青青陈惠芳刘占莲
Owner DONGHUA UNIV