Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of precursor fibers for wet-process spinning PAN-based carbon fibers

A carbon fiber, wet spinning technology, applied in wet spinning, fiber chemical characteristics, stretch spinning, etc., can solve the problems of loss of competitive advantage in price, difficulty in capital recovery, low market share, etc., and achieve solvent residue in the original silk. The effect of small volume, high transparency and reduced production cost

Inactive Publication Date: 2015-08-19
HENGSHEN
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, my country's carbon fiber has broken through the technical bottleneck of T700 and T800, and T300 has been able to produce stably on a large scale. Squeezed in sales space, lost competitive advantage in price, low market share, difficult capital recovery, basically in a state of loss

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
  • Preparation method of precursor fibers for wet-process spinning PAN-based carbon fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of the raw silk for the wet spinning PAN-based carbon fiber comprises the following steps:

[0024] (1) Preparation of polyacrylonitrile stock solution:

[0025] (A) raw materials for dissolution: acrylonitrile (AN) accounting for 98% of the total weight of the polymer, itaconic acid accounting for 1.0% of the total weight of the polymer, and methyl acrylate accounting for 1.0% of the total weight of the polymer are dissolved in In 80% dimethyl sulfoxide (DMSO) of the total weight of the polymerization solution, stirring for 1 h;

[0026] (B) Polymerization reaction: The azo initiator accounting for 0.05% of the total weight of the polymer is fully dissolved by the solvent and then added to the 3-stage series polymerization kettle at room temperature for polymerization. The polymerization kettle has a jacket and an external circulation device for the kettle. Before entering the polymerization tank, the initiator and the mixed single material are ...

Embodiment 2

[0034] The preparation method of the raw silk for the wet spinning PAN-based carbon fiber comprises the following steps:

[0035] (1) Preparation of polyacrylonitrile stock solution:

[0036] (A) Dissolving raw materials: acrylonitrile (AN) accounting for 97.5% of the total weight of the polymer, itaconic acid accounting for 1.0% of the total weight of the polymer, and methyl acrylate accounting for 1.5% of the total weight of the polymer are dissolved in In 80% dimethyl sulfoxide (DMSO) of the total weight of the polymerization solution, stirring for 1 h;

[0037] (B) Polymerization reaction: The azo initiator accounting for 0.05% of the total weight of the polymer is fully dissolved by the solvent and then added to the 3-stage series polymerization kettle at room temperature for polymerization. The polymerization kettle has a jacket and an external circulation device for the kettle. Before entering the polymerization tank, the initiator and the mixed single material are ful...

Embodiment 3

[0045] The preparation method of the raw silk for the wet spinning PAN-based carbon fiber comprises the following steps:

[0046] (1) Preparation of polyacrylonitrile stock solution:

[0047] (A) Dissolving raw materials: acrylonitrile (AN) accounting for 97.5% of the total weight of the polymer, itaconic acid accounting for 1.0% of the total weight of the polymer, and methyl acrylate accounting for 1.5% of the total weight of the polymer are dissolved in In 80% dimethyl sulfoxide (DMSO) of the total weight of the polymerization solution, stirring for 1 h;

[0048] (B) Polymerization reaction: The azo initiator accounting for 0.05% of the total weight of the polymer is fully dissolved by the solvent and then added to the 3-stage series polymerization kettle at room temperature for polymerization. The polymerization kettle has a jacket and an external circulation device for the kettle. Before entering the polymerization tank, the initiator and the mixed single material are ful...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of precursor fibers for wet-process spinning PAN-based carbon fibers. The preparation method comprises the following steps: (1) preparation of a polyacrylonitrile raw solution; (A) dissolving raw materials; (B) carrying out polymerization reaction; (C) obtaining the polyacrylonitrile raw solution; and (2) a spinning process: carrying out a condensation and molding process, a water washing process, an oil applying process, a drying and densifying process, a high-pressure steam drafting process, secondary oil application and a loosening hot molding process on the prepared polyacrylonitrile raw solution to obtain the precursor fibers. The residual amount and gel of the raw solution prepared by the method are less and the hydrophily is great; primary fibers obtained by the raw solution in a spinning and condensation molding process are dense and have high transparency, so that the operation in a spinning process is stable when the spinning speed is increased to be more than 125m / min; the solvent residual amount of the precursor fibers is small, and no broken fibers and parallel fibers are formed; the single-path yield is greatly improved and the production cost of the precursor fibers is greatly reduced; and under a high-speed spinning condition, a production process of T700-grade and T800-grade precursor fibers is met.

Description

technical field [0001] The invention relates to the field of nano-carbon fiber preparation, in particular to a method for preparing raw silk for wet spinning PAN-based carbon fiber. Background technique [0002] Polyacrylonitrile (PAN)-based carbon fiber has excellent characteristics such as high temperature resistance, corrosion resistance, small thermal expansion coefficient, good dimensional stability, high specific strength, high specific modulus and light weight, and is widely used in aerospace, rail transit, sports Supplies and other aspects have been widely used. At present, my country's carbon fiber has broken through the technical bottleneck of T700 and T800, and T300 has been able to produce stably on a large scale. The sales space is squeezed, the price loses its competitive advantage, the market share is low, capital recovery is difficult, and it is basically in a state of loss. [0003] According to public reports and statistics, there are about 40 domestic car...

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 Applications(China)
IPC IPC(8): D01F6/38D01F9/22D01D5/06D01D5/12
Inventor 徐国庆钱鸿川程世锋唐俊鑫霍清锋
Owner HENGSHEN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products