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A kind of preoxidation method of mesophase pitch fiber

A mesophase pitch and pre-oxidation technology, which is applied to the chemical characteristics of fibers, textiles and papermaking, and filament generation, can solve problems such as unsuitable for large-scale open use, increased operational difficulty, and irritating effects, so as to prevent yarn drifting and reduce Small friction and static electricity, the effect of preventing static electricity generation

Active Publication Date: 2022-06-24
上海高强高模新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method adopts a variety of intermittent heating sections. In order to prevent the crosslinking and embrittlement of the silicone oil film, heat treatment in an inert atmosphere is required in a special temperature section, which increases the difficulty of operation. At the same time, hydrogen peroxide has a stimulating effect on the human body, so it is not suitable for large-scale open use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Using the mesophase pitch, after bundling an amino-modified polydimethylsiloxane aqueous emulsion with a solid content of 1.5%, rolled pitch fiber strands were prepared. The raw silk passes through the unwinding equipment and is unwinded at a certain speed of unwinding. The fibers pass through the spray tank, the concentration of ethanol is 10%, and the cleaning time of the effective ethanol solution is 5 minutes. The fibers then enter a continuous preoxidation furnace, which has several temperature zones. A support plate is arranged in the pre-oxidation furnace. During the whole pre-oxidation process, the fiber strands are laid flat on the support plate. There is an air inlet in the pre-oxidation furnace to ensure the air atmosphere in the furnace. The first temperature zone at the entrance of the oxidation furnace is 200°C, and each subsequent temperature zone is heated in sequence until 320°C, and the temperature of the subsequent temperature zone to the outlet tem...

Embodiment 2

[0029] Using mesophase pitch, after bundling an amino-modified polydimethylsiloxane aqueous emulsion with a solid content of 2%, rolled pitch fiber strands were prepared. The raw silk passes through the unwinding equipment and is unwinded at a certain speed of unwinding. The fibers pass through the spray tank, the concentration of ethanol is 5%, and the cleaning time of the effective ethanol solution is 10 minutes. The fibers then enter a continuous preoxidation furnace, which has several temperature zones. A support plate is arranged in the pre-oxidation furnace. During the whole pre-oxidation process, the fiber strands are laid flat on the support plate. There is an air inlet in the pre-oxidation furnace to ensure the air atmosphere in the furnace. The first temperature zone at the entrance of the oxidation furnace is 180°C, and each subsequent temperature zone is heated in sequence until 300°C, and the temperature of the subsequent temperature zone to the outlet temperatu...

Embodiment 3

[0031]Using mesophase pitch, after bundling an amino-modified polydimethylsiloxane aqueous emulsion with a solid content of 1%, rolled pitch fiber strands were prepared. The raw silk passes through the unwinding equipment and is unwinded at a certain speed of unwinding. The fibers pass through the spray tank, the concentration of ethanol is 20%, and the cleaning time of the effective ethanol solution is 3 minutes. The fibers then enter a continuous preoxidation furnace, which has several temperature zones. A support plate is arranged in the pre-oxidation furnace. During the whole pre-oxidation process, the fiber strands are laid flat on the support plate. There is an air inlet in the pre-oxidation furnace to ensure the air atmosphere in the furnace. The first temperature zone at the entrance of the oxidation furnace is 160°C, and each subsequent temperature zone is heated in turn until 320°C, and the temperature of the subsequent temperature zone to the outlet temperature of...

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Abstract

The invention relates to the field of manufacturing high-performance carbon fibers, in particular to a preoxidation method for mesophase pitch fibers. The invention provides a method for pre-oxidizing mesophase pitch fibers, which comprises the following steps: (1) bundling the spun mesophase pitch fibers through a spinning oil agent to prepare rolled fiber precursors; (2) Unwinding the coiled fiber precursors through unwinding equipment, making the fiber precursors slowly wash with ethanol solution to remove the spinning oil, and then enter the pre-oxidation furnace; (3) the fiber precursors In the pre-oxidation furnace, the temperature is gradually raised and kept warm to complete the pre-oxidation. The invention innovatively adopts the scheme of oiling and bundling the spun pitch fiber first, then cleaning the spinning oil and then entering the pre-oxidation furnace, which can not only make the pitch fiber pre-oxidize in the bundled state, but also avoid spinning Effect of silk finish on preoxidation.

Description

technical field [0001] The invention relates to the field of high-performance carbon fiber manufacturing, in particular to a preoxidation method for mesophase pitch fibers. Background technique [0002] Mesophase pitch-based carbon fiber has the characteristics of high thermal conductivity, high modulus, high strength, etc., and is an urgently needed raw material in my country's aerospace field. Mesophase pitch-based carbon fibers need to go through processes such as spinning, pre-oxidation, carbonization, and graphitization, among which the spinning and pre-oxidation processes are the key points. Due to the international technical blockade, my country has not fully industrialized the preparation of high-performance carbon fibers from mesophase pitch. It is difficult to find literature on the specific process, and it is still being explored in China. [0003] During pitch spinning, hundreds of fibers ejected from the spinneret need to be integrated into a bundle, so that th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/145D01D11/00D01D10/06
CPCD01F9/145D01D11/00D01D10/06
Inventor 庞守德高强查凌驰
Owner 上海高强高模新材料科技有限公司
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