Method for preparing high-modulus carbon fiber by adopting precursor drawing technology

A carbon fiber and fiber technology, which is applied in the field of preparing high-strength and high-modulus carbon fiber, can solve the problems of affecting the mechanical properties of fibers, the method of physically stretching the fiber properties of the original silk fiber, and the cumbersome processing of equipment, etc. Oxidation and carbonization efficiency, effect of reducing fiber microscopic damage
CN105200566AInactive Publication Date: 2015-12-30THE NORTHWEST RES INST OF CHEM IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE NORTHWEST RES INST OF CHEM IND
Publication Date
2015-12-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for producing a high-modulus carbon fiber by adopting a precursor drawing technology. The method comprises the following steps: preparing a spinning solution, carrying out the wet-method spinning, solidifying a nascent fiber, drawing in steam, stretching a precursor to precursor fiber, pre-oxidizing the fiber, and carbonizing the fiber. By adopting the method, the defect of a micro structure in the fiber precursor preparation process can be effectively reduced, compared with the process which does not utilize the process, the orientation degree of the pre-oxidized fiber is further improved, and the mechanical performance of the carbonized fiber is remarkably improved; since the fiber is re-stretched at a temperature above a vitrification temperature, the fiber fineness is reduced, the specific surface area is increased in the high-temperature treatment process, and the thermal treatment efficiency is effectively improved; by virtue of the process, the fiber quality is obviously improved.
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Description

【Technical field】

[0001] The invention belongs to the technical field of high-performance fiber processing. More specifically, the present invention relates to a method for preparing high-strength and high-modulus carbon fibers by using the raw wire drawing technology. 【Background technique】

[0002] High-strength and high-modulus carbon fiber is a special fiber made of polyacrylonitrile organic fiber through carbonization treatment. It has excellent characteristics such as high specific strength, specific modulus, electrical conductivity, low thermal expansion coefficient and corrosion resistance. Utilizing its flexibility and anisotropy, it is woven and often used as a composite material reinforcement material, which is widely used in military, civil industry and other fields.

[0003] The carbon fiber preparation process is complicated, the process is cumbersome, and the equipment and technology requirements are high. High-quality polyacrylonitrile fiber is the prerequis...

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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