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Preparation method of polyacrylonitrile hollow fiber

A polypropylene cyanide spinning and polypropylene technology, which is applied in the field of preparation of polypropylene cyanide hollow fibers, can solve the problems of no mass production, no reports of activated carbon fiber products, and the failure of strength and activity to meet the comprehensive requirements of high-power power batteries. , to achieve good product performance, strong adsorption activity and mechanical strength, and low energy consumption ratio

Inactive Publication Date: 2019-04-30
贾琳
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are activated carbon fibers in foreign countries, but the comprehensive properties such as strength and activity cannot meet the comprehensive requirements for high-power power batteries, and activated carbon fibers with hollow structures have not been reported or mass-produced.

Method used

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Effect test

Embodiment

[0024] The pulverized phenolic resin is added to the high-speed spinning machine. The high-speed spinning machine spins the polypropylene cyanide at 320°C and stretches the orientation 20 times to obtain the hollow fiber. The spun hollow fiber is placed in a chemical exchange. In the coupler, add the crosslinking agent hydrochloric acid to react at 50°C for 1 hour to obtain hollow carbon fiber; then place the hollow carbon fiber in the carbonization activation device, and blow a large amount of hot air through the air compressor to make the carbonization activation device According to the heating rate of 5℃ / min, the temperature is raised to 200℃, pre-oxidation is 0.5h, then the inert gas is introduced and under the protection of inert gas, the temperature is raised to 600℃, and the carbonization treatment is carried out for 1.5h. After the carbonization treatment is completed, the temperature is increased to 900℃ and The activator mixed with sodium bicarbonate, sulfuric acid and...

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Abstract

The invention discloses a preparation method of polyacrylonitrile hollow fiber, and the method is: firstly, inputting polyacrylonitrile into a high-speed spinning machine, and spinning the polyacrylonitrile in the high-speed spinning machine at 320-450 DEG C to obtain hollow fiber; then putting the hollow fiber into a chemical cross-linking device with a cross-linking agent added so as to enable the hollow fiber to react at the temperature of 50-80 DEG C for 0.5-1 h to obtain hollow carbon fiber, putting the hollow carbon fiber in a carbonization activation device, heating to 200-350 DEG C according to a heating rate of 1-20 DEG C / min in an air atmosphere, and carrying out pre-oxidation for 0.5-1 h, heating to 500-800 DEG C in an inert gas to carry out carbonization treatment for 1-2 hours, heating to 700-1100 DEG C, and introducing an activating agent for activating treatment for 1-2 hours, and cooling to room temperature in a furnace under an inert atmosphere to obtain the polyacrylonitrile hollow fiber. The polyacrylonitrile hollow fiber is simple in preparation process, low in cost, free of pollution, good in product performance, high in yield and suitable for large-scale industrial production.

Description

Technical field [0001] The invention relates to the field of preparation of carbon fibers, in particular to a preparation method of polypropylene cyanide hollow fibers. Background technique [0002] Activated carbon fiber (ACF) is widely used in air purification and dehumidification, deodorization of refrigerators, gas purification, gas separation, organic solvent and compound recovery, industrial organic wastewater treatment, and anti-toxic gas due to its excellent adsorption performance. , Water purification, purification of high-purity water, catalysts or catalyst carriers, and sanitary products, and the use of activated carbon fiber felt to recover organic solvents has long been industrialized. Air purifiers, dehumidifiers and water purifiers have already come out, and they are fully shown in environmental protection. The efficient adsorption performance. In addition, based on its rich pore structure and carbon properties, as energy storage materials and electrode materials,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01J20/20B01J20/28023
Inventor 贾琳
Owner 贾琳
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