A method for preparing high-strength and high-modulus carbon fiber by using raw fiber drawing technology

A carbon fiber and fiber technology, which is applied in the field of preparing high-strength and high-modulus carbon fibers, can solve the problems of affecting the mechanical properties of fibers, cumbersome equipment processing, and easy to miss the method of physical drawing fiber properties, so as to improve the mechanical properties and reduce the number of fibers. The effect of micro damage, improving pre-oxidation and carbonization efficiency

Inactive Publication Date: 2018-03-02
THE NORTHWEST RES INST OF CHEM IND
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above patent applications require major changes to the existing equipment, and the processing of the equipment is cumbersome, or other inorganic elements are introduced while improving the thermal stability of the fiber, which will seriously affect the mechanical properties of the fiber during the high-temperature carbonization process, and the performance will not increase. reduce
[0005] At present, in the process of high-temperature treatment of polyacrylonitrile precursor fibers, most of the research focuses on the pre-oxidation gradient, pre-oxidation time, low / high temperature carbonization temperature and draft ratio, but it is often easy to miss the improvement of physical stretching of the precursor fiber. Methods of Fiber Properties

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
  • A method for preparing high-strength and high-modulus carbon fiber by using raw fiber drawing technology
  • A method for preparing high-strength and high-modulus carbon fiber by using raw fiber drawing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] Embodiment 1: Adopt the method of the present invention to produce high-strength high-modulus carbon fiber

[0106] The implementation steps of this embodiment are as follows:

[0107] A. Preparation of spinning solution and wet spinning

[0108] It will be produced by Northwest Research Institute of Chemical Industry and sold under the trade name PAN-P1 with a weight average molecular weight of 3×10 5 The above polyacrylonitrile polymer was dissolved in dimethyl sulfoxide solvent to obtain a solution containing 95.2% by weight of polyacrylonitrile and 1.0% of unsaturated carboxylic acid comonomer, and the solution was placed under pressure 3.2kPa to remove the monomer contained in it and the entrained air bubbles, so that the spinning solution is clear and free of air bubbles. Then use a candle wick filter sold by Shanghai Runlan Filtration Equipment Co., Ltd. under the trade name RH-ZS candle filter to filter, and use the method described in the specification to mea...

Embodiment 2

[0120] Embodiment 2: adopt the inventive method to produce high strength high modulus carbon fiber

[0121] The implementation steps of this embodiment are as follows:

[0122] A. Preparation of spinning solution and wet spinning

[0123] The weight average molecular weight to be sold by Beijing Chemical Co., Ltd. under the trade name acrylonitrile is 3×10 5 The above polyacrylonitrile polymer was dissolved in dimethyl sulfoxide solvent to obtain a solution containing 95.5% by weight polyacrylonitrile and 0.5% unsaturated carboxylic acid comonomer, and the solution was placed under pressure 3.8kPa to remove the monomers contained in it and the entrained air bubbles, so that the spinning solution is clear and free of air bubbles, and then use the candles sold by Shanghai Si Filter Environmental Protection Equipment Co., Ltd. under the trade name Si Filter SL-ACF filter Cartridge filter is filtered, adopts the method described in specification to measure, and the viscosity of ...

Embodiment 3

[0135] Embodiment 3: Adopt the method of the present invention to produce high-strength high-modulus carbon fiber

[0136] The implementation steps of this embodiment are as follows:

[0137] A. Preparation of spinning solution and wet spinning

[0138] To be sold under the trade name Acrylonitrile by Shanghai Jinjinle Industrial Co., Ltd. has a weight average molecular weight of 3×10 5 The above polyacrylonitrile polymer was dissolved in dimethyl sulfoxide solvent to obtain a solution containing 95.8% by weight of polyacrylonitrile and 2.1% of unsaturated carboxylic acid comonomer, and the solution was placed under pressure 3.0kPa to remove the monomers contained in it and the entrained air bubbles to achieve the degree of clarity and no air bubbles in the spinning solution, and then use the candle wick sold by Shanghai Jiayu Filtration Equipment Co., Ltd. under the trade name ZL series candle type airtight filter Type filter to filter, using the method described in the ins...

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
strengthaaaaaaaaaa
modulusaaaaaaaaaa
strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for producing high-strength and high-modulus carbon fibers by using the raw fiber drawing technology. Fiber, fiber pre-oxidation and carbonization and other steps. The invention can effectively reduce the defects of the microstructure in the preparation process of the fiber and the original fiber. Compared with the fiber without the application of the process, the orientation degree of the fiber used for pre-oxidation is further improved, and the mechanical properties of the fiber after carbonization are significantly improved; The above drawing again reduces the fiber fineness, increases the specific surface area during the high temperature treatment, and effectively improves the heat treatment efficiency; through the process of the present invention, the fiber quality is significantly improved.

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
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/22D01F11/14
Inventor 张力陈黎王小安张晓利张华东
Owner THE NORTHWEST RES INST OF CHEM IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap