High-hydrophilicity spinning fluid for high-performance polyacrylonitrile base carbon fiber and preparation method thereof

A polyacrylonitrile-based carbon fiber and hydrophilic technology, which is applied in the field of hydrophilic olefinic nitrile-based carbon fiber spinning solution and its preparation field to achieve the effects of improving hydrophilicity, improving performance, and uniform internal and external structures

Inactive Publication Date: 2009-09-30
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of polymerizable ionic liquids as comonomers to prepare hydrophilic polyacrylonitrile-based carbon fiber spinning solutions has not been reported in the literature

Method used

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  • High-hydrophilicity spinning fluid for high-performance polyacrylonitrile base carbon fiber and preparation method thereof
  • High-hydrophilicity spinning fluid for high-performance polyacrylonitrile base carbon fiber and preparation method thereof
  • High-hydrophilicity spinning fluid for high-performance polyacrylonitrile base carbon fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Solvent dimethyl sulfoxide, main monomer acrylonitrile, comonomer VinBuIm + Br - And itaconic acid, free radical initiator azobisisobutyronitrile, join in the reactor with condenser tube and mechanical stirring device. The weight percentage proportioning of added raw material is: main monomer acrylonitrile is 98% of monomer gross weight, comonomer VinBuIm + Br - The amount of comonomer itaconic acid is 1% of the total weight of the monomers, the amount of azobisisobutyronitrile is 0.5% of the total weight of the monomers, and the total concentration of the monomers is 20%. The mixture was stirred and mixed at room temperature. After bubbling nitrogen gas for 20 minutes, it was reacted at a constant temperature of 60° C. for 24 hours under the protection of nitrogen gas, and then residual monomers and air bubbles were removed to obtain a highly hydrophilic carbon fiber spinning solution. The weight-average molecular weight of the copolymer is 231,000, the molecular we...

Embodiment 2

[0029] Solvent dimethyl sulfoxide, main monomer acrylonitrile, comonomer ViEtIm + Br - And itaconic acid, free radical initiator azobisisobutyronitrile, join in the reactor with condenser tube and mechanical stirring device. The weight percentage proportioning of added raw material is: main monomer acrylonitrile is 90% of monomer gross weight, comonomer ViEtIm + Br - The total weight of the monomer is 5%, the comonomer itaconic acid is 5% of the total weight of the monomer, the amount of azobisisobutyronitrile is 0.5% of the total weight of the monomer, and the total concentration of the monomer is 20%. The mixture was stirred and mixed at room temperature. After bubbling nitrogen gas for 20 minutes, it was reacted at a constant temperature of 60° C. for 24 hours under the protection of nitrogen gas, and then residual monomers and air bubbles were removed to obtain a highly hydrophilic carbon fiber spinning solution. The weight-average molecular weight of the copolymer is 1...

Embodiment 3

[0031] Solvent dimethyl sulfoxide, main monomer acrylonitrile, comonomer ViMeIm + Cl - And itaconic acid, free radical initiator azobisisobutyronitrile, join in the reactor with condenser tube and mechanical stirring device. The weight percent proportioning of added raw material is: main monomer acrylonitrile is 97% of monomer gross weight, comonomer ViMeIm + Cl - The total weight of the monomer is 1%, the comonomer itaconic acid is 2% of the total weight of the monomer, the amount of azobisisobutyronitrile is 0.5% of the total weight of the monomer, and the total concentration of the monomer is 25%. The mixture was stirred and mixed at room temperature. After bubbling nitrogen gas for 20 minutes, it was reacted at a constant temperature of 65° C. for 24 hours under the protection of nitrogen gas, and then residual monomers and bubbles were removed to obtain a highly hydrophilic carbon fiber spinning solution. The weight-average molecular weight of the copolymer is 276,000,...

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Abstract

A hydrophilic spinning solution of polyacrylonitrile-based carbon fibers constitutes a dimethyl sulfoxide solution of acrylonitrile as the main monomer and a comonomer copolymer; comonomer 1 is vinyl imidazolium salt, and comonomer 2 is Itaconic acid, acrylic acid, methacrylic acid or their mixtures; the main monomer is 90-99.5% of the total weight of monomers, and the total weight of comonomers is 0.5-10% of the total weight of monomers; where comonomer 1 accounts for 10-90% of the total weight of the comonomer, comonomer 2 accounts for 90-10% of the total weight of the comonomer, and the weight percentage of the total monomer concentration is 15-25%. Add solvent dimethyl sulfoxide, main monomer acrylonitrile, comonomer 1 and comonomer 2, free radical initiator azobisisobutyronitrile into the reactor with condenser tube and mechanical stirring device according to the proportion Stir and mix at room temperature. After bubbling nitrogen for 20 minutes, under nitrogen protection, react at a constant temperature of 50-70°C for 6-36 hours, and then remove residual monomers and air bubbles to obtain a hydrophilic carbon fiber spinning liquid.

Description

technical field [0001] The invention relates to a hydrophilic acrylonitrile-based carbon fiber spinning liquid containing a vinyl imidazolium salt structural unit and a preparation method thereof. Background technique [0002] Carbon fiber has the characteristics of high specific strength, high specific modulus, heat resistance, corrosion resistance, fatigue resistance, and creep resistance. It is a high-performance fiber material and has been widely used in aerospace, national defense construction, sports and leisure products, and medical equipment. and construction industries. Polyacrylonitrile-based carbon fiber has outstanding mechanical properties and is a hot spot in carbon fiber research in recent years. Some people think that high-quality polyacrylonitrile precursor is one of the keys to prepare high-performance polyacrylonitrile-based carbon fibers, and to obtain high-quality polyacrylonitrile precursor must synthesize high-quality acrylonitrile copolymer spinning ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/44D01F9/22C08F226/06C08F220/02
Inventor 李悦生张贵宝李百祥刘晓辉白云刚
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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