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Activated carbon fiber pore expanding method

A technology of activated carbon fiber and reaction, which is applied in the direction of fiber chemical characteristics, textiles and papermaking, chemical post-treatment of rayon, etc. It can solve the problems of activated carbon fiber structure influence, complex process, poor safety control, etc., and achieve basic structure and performance Small impact, increased quantity and pore volume, good application prospects

Active Publication Date: 2020-04-10
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above-mentioned pore-enlarging methods can realize the pore-enlarging treatment of activated carbon or activated carbon fibers, they are not very fine in terms of pore structure control, the expansion ratio is not ideal, and the structure of activated carbon fibers after pore expansion will be affected to a certain extent.
In addition, the above-mentioned processes are generally more complicated, and the safety is not easy to control

Method used

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  • Activated carbon fiber pore expanding method
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  • Activated carbon fiber pore expanding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Present embodiment provides a kind of viscose-based activated carbon fiber pore expansion method, described method comprises the following steps:

[0037] (1) Select 2 g of viscose-based activated carbon fibers and dry them at 150°C for 2 hours;

[0038] (2) Place the activated carbon fiber after drying in a crucible with a metal tantalum skin as the inner liner. The thickness of the tantalum skin is 0.05mm, and then add 0.03g of magnesium powder. The weight ratio of magnesium powder to activated carbon fiber is 3:200, and the reaction The temperature is 850°C, the reaction atmosphere is nitrogen, and the reaction time is 30 minutes;

[0039] (3) After the reaction is completed, the obtained product is ultrasonically cleaned in deionized water for 1 hour, and then dried at 120° C. for 2 hours to obtain the pore-expanding activated carbon fiber.

[0040] SEM scanning is carried out to the expanded activated carbon fiber that present embodiment prepares, and gained photo...

Embodiment 2

[0046] The present embodiment provides a polyacrylonitrile-based activated carbon fiber hole-enlarging method, the method comprising the following steps:

[0047] (1) 2 g of polyacrylonitrile-based activated carbon fibers were selected and dried at 120 ° C for 3 hours;

[0048] (2) Place the activated carbon fiber after drying in a crucible with a metal tantalum skin as the inner liner. The thickness of the tantalum skin is 0.08mm, then add 0.05g of magnesium powder, the weight ratio of magnesium powder to activated carbon fiber is 1:40, and react The temperature is 1000°C, the reaction atmosphere is helium, and the reaction time is 1 hour;

[0049] (3) After the reaction is completed, the obtained product is ultrasonically cleaned in deionized water for 1.5 hours, and then dried at 120° C. for 2 hours to obtain the pore-expanding activated carbon fiber.

[0050] Test the pore volume and pore diameter of the polyacrylonitrile-based activated carbon fiber selected in this embodi...

Embodiment 3

[0055] The present embodiment provides a kind of pitch-based activated carbon fiber hole expansion method, and described method comprises the following steps:

[0056] (1) Select 2g of pitch-based activated carbon fiber and dry it at 130°C for 2.5 hours;

[0057] (2) Place the activated carbon fiber after drying in a crucible with a metal tantalum skin as the inner liner. The thickness of the tantalum skin is 0.1mm, then add 0.1g of magnesium powder, the weight ratio of magnesium powder to activated carbon fiber is 1:20, and react The temperature is 1200°C, the reaction atmosphere is nitrogen, and the reaction time is 2 hours;

[0058] (3) After the reaction was completed, the obtained product was ultrasonically cleaned in deionized water for 2.5 hours, and then dried at 120° C. for 2 hours to obtain the pore-expanding activated carbon fiber.

[0059] Test the pore volume and pore diameter of the pitch-based activated carbon fiber selected in this embodiment and the prepared ...

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Abstract

The invention relates to an activated carbon fiber pore expanding method. The activated carbon fiber pore expanding method comprises the following steps of carrying out mixing on activated carbon fibers and magnesium powder, then performing heating for reaction, and washing after the reaction is completed to obtain the pore-expanded activated carbon fibers. According to the method provided by theinvention, fine control on the inner and outer pore structures of the activated carbon fibers can be realized, the number and the pore volume of the pores are remarkably increased, the influence on the basic structure and the performance of the fibers is small, and the obtained pore-expanded activated carbon fibers are almost consistent to the structures of the fibers before pore expansion. The method provided by the invention can also provide a reliable path for activated carbon fiber functionalization, and the obtained pore-expanded activated carbon fibers can be widely applied to energy andenvironmental protection fields as an adsorbent or a catalyst carrier, and has a high application prospect.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to the field of carbon fiber preparation, in particular to a method for expanding holes of activated carbon fibers. Background technique [0002] Activated carbon fiber has the characteristics of large specific surface area and many pores, and has a strong adsorption and removal function for harmful gases, liquids, harmful ions, and solid particles, and has a wide range of applications in many fields such as energy and environmental protection. [0003] In the prior art, methods such as water vapor activation, acid-base activation, and porogen treatment are usually used in the preparation process of activated carbon fibers to realize the generation and regulation of the internal pore structure of the fibers. For example, CN107973296A discloses a preparation method of large-pore activated carbon, which uses hydroxide as a pore-enlarging agent dissolved in ethanol, and then high-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F11/12
CPCD01F11/12
Inventor 姚理荣孙通吴绥菊潘刚伟徐思峻孙启龙季涛
Owner NANTONG UNIVERSITY
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