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Active carbon fibre and preparation thereof

An activated carbon fiber and fiber technology, which is applied in the field of multifunctional activated carbon fiber and its preparation, can solve the problems of inability to guarantee the fastness of deposited silver on the surface of activated carbon fiber, large loss of efficacy, easy shedding, etc., and achieves no shedding pollution, fast antibacterial speed, The effect of good antibacterial properties

Inactive Publication Date: 2009-01-21
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method adsorbs and deposits silver on the matrix activated carbon fiber by impregnation, and the silver fastness of the deposited activated carbon fiber surface cannot be guaranteed. It is easy to fall off during use, and the efficacy loss is large, and the fallen silver will pollute the environment.

Method used

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Examples

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Effect test

preparation example Construction

[0025] The present invention simultaneously designs the preparation method (abbreviation preparation method) of activated carbon fiber. In the preparation method, the base material fiber-forming polymer fiber containing functional additive components is prepared by blending wet spinning process based on the composition of the activated carbon fiber described in the present invention, and the base material fiber-forming polymer fiber is a polymer fiber. Acrylonitrile-based fiber, modified polyacrylonitrile-based fiber, polyvinyl alcohol-based fiber or regenerated cellulose fiber-based fiber; then the substrate fiber-forming polymer fiber (referred to as the substrate fiber) containing functional additives The following activation treatment (activation treatment):

[0026] 1. The polyacrylonitrile-based fibers containing functional additives can be activated by physical methods or by physical-chemical methods. The physical activation method is as follows: firstly, the base fibe...

Embodiment 1

[0037] Commercially available silver-loaded activated carbon powder (average particle diameter 2.0mm, specific surface area 200m 2 / g, silver content 0.77wt%) and N, N-dimethylformamide (DMF) are mixed by the weight ratio of 1: 1, stir 120min in the ball mill, obtain the silver-loaded activated carbon filter of 50wt% solid content after suction filtration cake. According to scanning electron microscope observation, the particle average diameter of the silver-loaded activated carbon is between 0.1 and 4 μm, meeting the requirements of the ultra-fine silver-loaded adsorbent. The silver-loaded activated carbon and polyacrylonitrile in the silver-loaded activated carbon filter cake are blended, stirred, and defoamed in a stirred tank in a weight ratio of 10.0: 90.0, 15.0: 85, and 20.0: 80 (wt%). Sprayed from the spinneret, washed with water, stretched, dried and wound to obtain polyacrylonitrile-based fibers with silver-loaded activated carbon contents of 10.0, 15.0, and 20.0 (wt...

Embodiment 2

[0044] After first mixing 100 g of ultrafine silver-loaded activated carbon powder (between 0.1 and 4 μm in particle size, silver content of 0.76 wt%) and 2000 g of polyvinyl alcohol (polymerization degree 1800, hydrolysis degree 88%) aqueous solution with a concentration of 20 wt%, stir evenly , through defoaming, metering pump metering, spinneret and coagulation bath, drawing, drying and other processes to make polyvinyl alcohol-based fibers containing 20 wt% of ultrafine silver-loaded activated carbon powder.

[0045] The above-mentioned fibers are processed into acetalized fibers through a conventional acetalization process, and the resulting acetalized fibers are treated at 4% (w / v) (NH 4 ) 3 PO 4 and 8% (w / v) (NH 4 ) 2 SO 4After dipping in the mixed solution prepared according to 4:6 (wt:wt) for 40 minutes, pre-oxidize and shape in the muffle furnace at 200°C for 50 minutes, put the fiber sample in the resistance furnace, heat up at 10°C / min, and set the temperature ...

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PUM

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Abstract

The invention relates to an activated carbon fiber and a preparation method thereof. The compositions in weight percentage of the activated carbon fiber are: 80 to 95 percent of fiber-forming polymer, and 20 to 5 percent of functional additive component, wherein the fiber-forming polymer can be polyacrylonitrile, modified polyacrylonitrile, polyvinyl alcohol or regenerated cellulose fiber; and the functional additive component can be a superfine absorbent of supporting metal with the average diameter of between 0.01 and 20 mu meter; and the supporting metal can be one of a silver ion, a copper ion or a zinc ion. The preparation method comprises the following steps: a base material fiber-forming polymer fiber containing the functional additive component is prepared first, wherein the base material fiber can be a polyacrylonitrile fiber, a modified polyacrylonitrile, a polyvinyl alcohol fiber or a regenerated cellulose fiber base fiber; and different physical activation treatments or / and chemical activation treatments are carried out according to different base material fibers to produce the activated carbon fiber corresponding to the base material.

Description

technical field [0001] The invention relates to activated carbon fiber technology, specifically a multifunctional activated carbon fiber with excellent antibacterial and adsorption properties and a preparation method thereof. Background technique [0002] At present, people pay more and more attention to their own health and environmental sanitation, and various adsorbent materials have been applied in the fields of water and air purification. Activated carbon fiber has small fiber diameter, high specific surface area, developed microporous structure, small pore size and narrow distribution, large adsorption capacity, fast adsorption and desorption speed, easy regeneration, and can be prepared into corresponding forms according to specific requirements, such as felt, Cloth, etc., easy to use and so on. There are many matrix materials for making activated carbon fibers, such as polyacrylonitrile, polyvinyl alcohol, viscose fiber, phenolic resin fiber and pitch-based fiber. ...

Claims

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Application Information

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IPC IPC(8): D01F9/22D01F9/21D01F9/16D01F1/10B01J20/20B01J20/28B01J20/30
Inventor 张华陈晨王学晨牛建津
Owner TIANJIN POLYTECHNIC UNIV
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