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New technology and device for pdyacrylonitril fiber preoxidation and carbonation

A polyacrylonitrile fiber, pre-oxidation technology, applied in the direction of fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of slow adjustment speed and low thermal efficiency of electric furnace

Inactive Publication Date: 2003-09-17
陈新谋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to adopt a new structure heating furnace to overcome the defects of low thermal efficiency and slow adjustment speed of the electric furnace, realize the random adjustment of the temperature gradient of the furnace chamber and realize the one-time completion of the pre-oxidation carbonization process

Method used

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  • New technology and device for pdyacrylonitril fiber preoxidation and carbonation
  • New technology and device for pdyacrylonitril fiber preoxidation and carbonation
  • New technology and device for pdyacrylonitril fiber preoxidation and carbonation

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Embodiment Construction

[0009] In order to achieve the purpose of the present invention, a negative pressure plasma heating device with a high-frequency power supply 1 as an energy source is specially designed to improve the existing carbon fiber processing technology. In this device, the plasma reaction chamber 3 is a flat hollow made of quartz glass. The cavity has thread inlet and outlet ports (3A, 3B) on both ends, and is equipped with front and rear sealing covers (4, 5). Its function is to keep the front wire feeding wheel 6 and the wire receiving wheel 7 of the main structural components in the differential speed receiving mechanism in a sealed state, so as to form a negative pressure environment in the reaction chamber. Correspondingly arranged outside the plane above and below the reaction chamber 3 is a parallel plate excitation electrode 2 corresponding to its size and shape. After connecting the high-frequency power supply, a high-frequency alternating uniform strong electric field. A ne...

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Abstract

A process for preoxidizing and carbonizing polyacrylonitrile fibres to obtain carbon fibres features the use of a HF negative-pressure plasma heater which is composed of HF power supply, parallel plate electrodes, flat reaction cavity made of quartz glass, and the accessory for generating negative pressure in reacion cavity and proportioning N2 and O2. The plasma generated in the reaction cavity can greatly lower the temp. of preoxidizing and carbonizing, so both steps can be performed in a single heater, resulting in low energy consumption and low cost.

Description

technical field [0001] The invention belongs to the improvement of the process and device for preparing polyacrylonitrile carbon fiber. Background technique [0002] Carbon fiber has a series of advantages such as low density, high strength, high temperature resistance, corrosion resistance, low electrical resistance, high thermal conductivity, low expansion coefficient, and chemical radiation resistance. Therefore, as a reinforcement of high-performance composite materials, it is widely used in composite materials with resin, ceramics, cement, and metal to become an important composite material in the fields of aviation, aerospace, military, sports, construction, and chemical industry. The carbon fiber currently used in large quantities is made of polyacrylonitrile fiber as raw material. The polyacrylonitrile fiber enters the heating furnace under the draft force through the driving roller, and the easily meltable components are oxidized and heated at a ...

Claims

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Application Information

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IPC IPC(8): D01F9/22D01F9/32
Inventor 陈新谋
Owner 陈新谋
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