High strength polyacrylonitrile-base carbon fibers having structured surface grooves, and preparation method thereof

A polyacrylonitrile-based carbon fiber, high-strength technology, applied in the direction of fiber chemical characteristics, wet spinning, stretch spinning, etc., can solve the problems of improvement, disordered fiber surface grooves, and high preparation cost, and achieves easy polymerization control, High tensile strength, performance improvement effect
CN102733009AActive Publication Date: 2012-10-17BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2012-10-17

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Abstract

The present invention relates to high strength carbon fibers having structured surface grooves, and a preparation method thereof. According to the present invention, a wet spinning technology is adopted, and a solvent adopted by polymerization and solidification molding is modified, such that the solvent and the modifying agent form a complex structure so as to improve solidification double-diffusion in the wet spinning solidification molding process to prepare a polyacrylonitrile precursor having a axial structured surface groove structure and a uniform and dense radial structure; and then pre-oxidation structure control is adopted in a pre-oxidation process to prepare the high strength polyacrylonitrile-base carbon fibers having the structured surface groove structure. The carbon fibers of the present invention have high tensile strength and high modulus, and are easily compounded with other materials so as to improve performances of the composite material.
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Description

technical field

[0001] The invention relates to a high-strength polyacrylonitrile-based carbon fiber with regular surface grooves and a preparation method thereof, belonging to the field of carbon material preparation. Background technique

[0002] Carbon fiber has the characteristics of high specific strength, high specific modulus, high temperature resistance, corrosion resistance, and good electrical and thermal conductivity, so it is widely used in aerospace, transportation, building energy, sports and leisure and other fields. The main manufacturers of polyacrylonitrile-based carbon fiber include Toray Corporation of Japan and Hexcel Corporation of the United States. Polyacrylonitrile-based carbon fibers are mainly divided into four categories according to their properties, namely, high-strength carbon fibers with a strength of 3.5-4.9GPa and a modulus of about 230GPa; 2.74GPa, high-model carbon fiber with a modulus of 392GPa and high-strength high-model carbon fiber w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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