Supercharge Your Innovation With Domain-Expert AI Agents!

Method for preparing special-shaped cross-section carbon fiber precursor fiber, pre-oxidized fiber or carbon fiber by high-speed dry jet spinning

A technology of precursor fibers and special-shaped cross-sections, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, can solve problems such as undiscovered reports, achieve the effects of reducing production costs, stabilizing production, and increasing single-line production capacity

Active Publication Date: 2021-05-18
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of carbon fiber precursor fiber, pre-oxidized fiber or carbon fiber prepared by the present invention with the shape and cross-section characteristics similar to spur gears has not been found after searching.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing special-shaped cross-section carbon fiber precursor fiber, pre-oxidized fiber or carbon fiber by high-speed dry jet spinning
  • Method for preparing special-shaped cross-section carbon fiber precursor fiber, pre-oxidized fiber or carbon fiber by high-speed dry jet spinning
  • Method for preparing special-shaped cross-section carbon fiber precursor fiber, pre-oxidized fiber or carbon fiber by high-speed dry jet spinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073]Acrylonitrile, methyl acrylate and tie (97: 2: 1) were added in accordance with the ratio to the water (total monomer mass concentration of 25%), and the molecular weight was 80,000 by suspension polymerization. The molecular weight distribution coefficient is 1.6 PAN-type polymer (in which the coefficient of the comonomer is 3%). The polymerized PAN-based polymer was dissolved in a mixed solution of dimethyl sulfoxide solvent and dimethylacetamide (mass ratio of 15:85), formulated into a spinning liquid having a solid content of 30% by weight. The viscosity of the spinning liquid was 40 Pa.s, the gel point was -25 ° C, and the gel interval was 8 ° C. A stainless steel metal fiber flask of 10 μm and 0.2 μm was used in times, and the spinning fluid was transferred to the deodorant, and then spun. The spinning liquid is spinning, the spinning liquid temperature is 55 ° C, the dry spray section is from -10 ° C, the spray hole is a circular spray hole, the pore diameter is 0.050 m...

Embodiment 2

[0075]Acrylonitrile, acrylic acid (molar ratio of 99.8: 0.02) was added to the n-heptane (the total monomer mass concentration of 6%) according to the ratio, and the molecular weight of 950,000, the molecular weight distribution coefficient was 5.5 by polymerization. The polymer (in which the co-polymer content is 0.02%). The PAN-type polymer obtained by the polymerization was dissolved in dimethyl sulfoxide, formulated into a spinning liquid having a solid content of 5.1% by weight. The viscosity of the spinning liquid was 110Pa.s, the gel point was 14 ° C, and the gel interval was 6 ° C. The non-woven fabric felt fracture of 3 μm and 0.5 μm was used sequentially, and then the spinning liquid was transferred to the deodorant, and then spinned. The spinning liquid is spun, the spinning liquid is 65 ° C, and the dry spray sections are air, the spray hole is a circular spray hole with a pore diameter of 0.065 mm. During the spinning process, two solidified bath grooves are used, and t...

Embodiment 3

[0077]Acrylonitrile, methyl acrylate (molar ratio 94: 6) was sequentially added to the zinc chloride solution (total monomer mass concentration of 25%) in accordance with the ratio, and the molecular weight was 33,000, the molecular weight distribution coefficient was 3.3 by polymerization. The PAN-class polymer (the molar content of the comonomer in it is 6%). The PAN-type polymer obtained by the polymerization was dissolved in dimethylacetamide, formulated into a spinning liquid having a solid content of 10.5 wt%. The viscosity of the spinning liquid was 110Pa.s, the gel point was 9 ° C, and the gel interval was 6 ° C. The stainless steel metal fiber flask of 5 μm and 2 μm was used sequentially, and the spinning fluid was transferred to the deodorant, and then spinned. The spinning fluid is 35 ° C, the spray liquid temperature is from 35 ° C, the dry spray sections are the circular spray hole, the pore diameter of 0.07 mm. During the spinning process, three coagulation baths are u...

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
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

A method for preparing special-shaped cross-section carbon fiber precursor fibers, preoxidized fibers or carbon fibers by high-speed dry jet spinning is to use a solvent to dissolve acrylonitrile polymers to obtain a uniform spinning solution, which passes through the spinneret hole to form a spinning solution. After the fine flow of silk, it enters the coagulation bath component lower than the gel temperature of the spinning solution to form primary fibers. The primary fibers are drawn, washed, dried, and oiled to obtain carbon fiber precursor fibers. The carbon fiber precursor fiber is pre-oxidized and carbonized to obtain pre-oxidized fiber or carbon fiber. The invention has the advantages of preparing the fiber with the shape and cross-section characteristics similar to that of a spur gear under high drafting conditions, low cost and good fiber performance.

Description

Technical field[0001]The present invention relates to a chemical fiber product and a method of preparation thereof, in particular a method of preparing a high-speed dry spinning wire to prepare a cross-sectional carbon fiber precursor fiber, pre-oxidized fiber or carbon fiber.Background technique[0002]Due to the excellent performance of high ratios, high ratios, corrosion resistance, carbon fiber, has been widely used in aerospace, national defense industries, sporting goods, new automotive industries and new energy. At present, the most widely used carbon fiber is polyacrylonitrile (hereinafter sometimes referred to as PAN)-based carbon fiber, the preparation method obtains acrylonitrile and certain monomers to obtain PAN, and the spinning liquid containing PAN is wet, dry, dry Spinning or dry sprinkler, obtaining a PAN renovation fiber, obtained by post-treatment to obtain carbon fiber precursor fibers (sometimes referred to as carbon fiber), then in 200 to 400 ° C, carbon fiber f...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/22
CPCD01F9/22
Inventor 刘耀东周普查吕春祥安锋于毓秀
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com