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Active carbon fiber in hollow morphological structure, and preparation method

A technology of activated carbon fiber and morphological structure, applied in hollow filament manufacturing, fiber chemical characteristics, rayon manufacturing and other directions, can solve problems such as limited application, and achieve a wide range of applications, good formability, and good purification effect.

Inactive Publication Date: 2006-04-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In 1999, Chen Lu (patent application number: 97120296.6) reported a method for producing activated carbon fibers using solid polyacrylonitrile fibers as raw materials, but the inorganic salt NaCO 3 Soaking was carried out, but this method uses pre-oxygenated wire containing metal ions, so that the final ACF inevitably contains more metal ions, which limits its application in the fields of medicine, catalysis, etc.

Method used

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  • Active carbon fiber in hollow morphological structure, and preparation method
  • Active carbon fiber in hollow morphological structure, and preparation method
  • Active carbon fiber in hollow morphological structure, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Get polyacrylonitrile hollow fiber raw material 1.5g and put into concentration at room temperature and be 4% weight (wt) (NH 4 ) 2 HPO 4 Soak in the aqueous solution for 30 minutes, let it dry naturally in the air, put it in an oven, heat it in the air at 230°C for 2 hours, and the pre-oxidation is over; then put the pre-oxidized fiber into the quartz tube in the tube furnace , heated to 900°C under the protection of nitrogen, heated at 900°C for 70 minutes, and the carbonization was completed; then the furnace temperature was naturally lowered to 800°C, and CO 2 gas, heated at 800°C for 40 minutes, the activation is over, and the CO is turned off 2 Gas, use a vacuum pump to remove CO from the quartz tube 2 Gas, and then nitrogen gas, when the nitrogen pressure in the quartz tube is 1 atmosphere, seal the two ends of the quartz tube, turn off the nitrogen, until the temperature in the quartz tube drops to room temperature, take out the hollow fiber, which is the fin...

Embodiment 2

[0020] The above-mentioned activated carbon fiber is effective for small molecular substances (creatinine) and medium molecular substances (VB 12 ) adsorption rate is shown in the following table: at 37 ° C, creatinine and VB 12 Static adsorption in aqueous solution for 24 hours.

[0021] name

Embodiment 3

[0023] BET specific surface area (m 2 g -1 )

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Abstract

The present invention relates to an active carbon fibre adopting hollow morphological structure and its preparation method. The pose size distribution of its microspore and mid-pore is 2-90nm, and the pore size distribution of the mid-pore is 2-5nm. The invention uses medical polyacrylonitrile hollow fibre as raw material and adopts the following steps: soaking the raw material in solution containing phosphide to make pretreatment, preliminary heat treatment in oxidizing, carbonization and activation to obtain the invented product.

Description

technical field [0001] The invention relates to an activated carbon fiber with a hollow shape structure and a preparation method. Background technique [0002] Activated carbon fiber (ACF) is a carbonaceous adsorption material developed on the basis of carbon fiber. It is made of organic fiber as raw material and activated by high-temperature carbonization. Compared with traditional activated carbon, ACF has the following characteristics: large specific surface area; concentrated pore size distribution; fast adsorption and desorption rate, and can have various processing forms such as felt, cloth, and paper; The adsorption of trace substances is particularly effective, that is, the adsorption efficiency is high at low concentrations. Activated hollow carbon fiber (ACHF) started late and is a new type of adsorption material. Compared with ACF, it is hollow, porous, self-supporting, and the pore size can be controlled by fibrils, carbonization, and activation process conditio...

Claims

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Application Information

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IPC IPC(8): D01F9/12D01F9/22D01D5/24
Inventor 孙俊芬王庆瑞陈雪英朱思君武利顺
Owner DONGHUA UNIV
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