Process for preparing precursor fiber of cellulose base carbon fiber

A technology based on carbon fiber and precursor fiber, which is applied in the field of preparation of precursor fiber of cellulose-based carbon fiber, can solve the problems of no patent, high cost, and insufficient carbonization yield, and achieve simple spinning process and high carbonization yield The effect of improving and non-toxic recovery rate

Inactive Publication Date: 2005-03-02
DONGHUA UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

The production process of Lyocell is simple and clean. Compared with traditional viscose fiber, Lyocell fiber has the characteristics of round cross-section, uniform structure, high degree of orientation and crystallinity, and good mechanical properties. Moreover, its fineness can be adjusted by adjusting the spinning process. The parameters are controlled, and using this fiber as a precursor fiber can prepare cellulose-based

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1: The cellulose cotton pulp with a degree of polymerization of 500 was cut into small pieces of 2cm×2cm with a pulp chopper, and these pieces were adjusted to a vacuum degree of -9×10 4 Pa and 50℃ dry and equilibrate for 6 hours to make the water content reach 2%; 2800 grams of NMMO aqueous solution with 50% water content is distilled under reduced pressure to obtain 1885 grams of NMMO aqueous solution with 26% water content; A water dispersion of nano carbon black with a solid content of 0.4% and a particle size of 10 nm.

[0015] The obtained 1885 g of NMMO aqueous solution with a water content of 26% and 4000 g of carbon black aqueous dispersion were mixed and stirred on a magnetic stirrer for 3 hours, and then 3984 g of water was distilled out under reduced pressure to form 1901 g of NMMO with a water content of 25.8%. / Carbon black aqueous solution.

[0016] Put the above-mentioned NMMO / carbon black aqueous solution and 160 grams of dried cellulose cotton pul...

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PUM

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Abstract

The present invention relates to preparation process of precursor fiber of cellulose base carbon fiber in chemical fiber production. The preparation process includes mixing concentrated NMMO aqua and carbon black for carbon black water in the weight ratio of 20-10000, decomprssion distillation to obtain NMMO/carbon black solution with water content 24-28 wt%, adding the mixtue of sliced cellulose pulp and NMMO/carbon black solution in the weight ratio of 5-15 to 100 into dissolving reactor, swelling and stirring at 70-90 deg.c, raising the temperature to 90-120 deg.c, stirring and decomprssion distillation to eliminate water and form cellulose/NMMO/carbon black spinning liquid with water content of 12-14 wt%, and dry-wet spinning to obtain the precursor fiber. The present invention has high carbonizing yield, high mechanical performance of the carbon fiber, raised spinnability of the spinning liquid, non-toxic solvent, high solvent recovering rate and environment friendship.

Description

technical field [0001] The present invention relates to the preparation method of the precursor fiber of carbon fiber in the chemical fiber industry, particularly refer to the technology of adding carbon black to spinning the precursor fiber of cellulose-based carbon fiber in N-methylmorpholine oxide (NMMO) aqueous solution . The carbon fiber prepared by using the precursor fiber has high strength, high modulus, ablation resistance and other properties, and can be widely used in the fields of aviation, aerospace, military, energy, transportation and medicine. Background technique [0002] Carbon fiber is a fibrous carbon material, and its preparation is generally obtained by using organic polymer fibers as precursor fibers and undergoing oxidation and carbonization treatments. At present, the three major precursor fibers for preparing carbon fibers are polyacrylonitrile (PAN) fibers, pitch fibers and cellulose fibers. In the world carbon fiber market, PAN-based carbon fibe...

Claims

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Application Information

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IPC IPC(8): D01F2/00D01F9/16
Inventor 胡学超张慧慧邵惠丽章潭莉郭利伟
Owner DONGHUA UNIV
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