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Modification method of activated carbon fiber material

A technology of activated carbon fiber and activated carbon fiber cloth, which is applied in the field of modification of activated carbon fiber materials, can solve problems such as insufficiency and achieve safe and gentle reaction conditions

Active Publication Date: 2021-07-09
NANCHANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new type of adsorption material, activated carbon fiber has the characteristics of large specific surface area, large adsorption capacity, fast adsorption and desorption speed, and reusability. It is an excellent air conditioning filter and air purifier filter element material, but the performance of activated carbon fiber material It is not enough to meet the existing needs, and there is room for further improvement of the adsorption performance. Therefore, it is of great application value to propose a modified activated carbon fiber material with better adsorption effect.

Method used

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  • Modification method of activated carbon fiber material
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  • Modification method of activated carbon fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for modifying polyacrylonitrile-based activated carbon fibers, including soaking + heat treatment modification: cutting polyacrylonitrile-based activated carbon fiber cloth (hereinafter referred to as ACF) into about 2g / piece. Then the cut ACF was filled with 300ml of different concentrations (4%, 6%, 8%, 10%, 15%, 20%, 25%, 30%) of H 2 o 2 Immerse completely in a beaker for 24 hours. Then put the soaked ACF into a 100ml porcelain crucible with tweezers, place it in an oven for 4 hours at 120°C, and then adjust the oven to 200°C for heat treatment for 3 hours, take it out and cool it, and obtain the modified ACF material.

Embodiment 2

[0029] A method for modifying polyacrylonitrile-based activated carbon fibers, including heat treatment + soaking modification: cutting polyacrylonitrile-based activated carbon fiber cloth into about 2g / piece. Put the cut ACF into a 100ml porcelain crucible, heat it in an oven at 200°C for 3 hours, and take it out to cool. The ACF after the heat treatment is filled with 300 ml of H of different concentrations (4%, 6%, 8%, 10%, 15%, 20%, 25%, 30%) respectively. 2 o 2 After immersing in a beaker for 24 hours, place it in an oven for 4 hours at 120°C and then take it out to cool to obtain a modified ACF material.

Embodiment 3

[0031] The modified ACF material prepared in the above-mentioned Examples 1-2 was detected, and the results are shown in Table 1. When no modification treatment was performed, the ACF effect on SO 2 The adsorption capacity was 4.6076 mg / g. Through different concentrations of H 2 o 2 After immersion, ACF vs. SO 2 The adsorption capacity has been improved to a certain extent, in which 10% H 2 o 2 After soaking, the adsorption capacity increased the most, reaching 4.9819mg / g, which was 8.12% higher than that of the unmodified ACF original sheet. followed by H 2 o 2 When the concentration increases, the aggressiveness to the ACF material is too large, which makes the ACF structure unstable and collapses, resulting in ACF-SO 2 The adsorption capacity decreased gradually, when the H 2 o 2 When the concentration exceeds 20%, the promotion rate begins to decrease, so the preferred H 2 o 2 The concentration is 4%-20%.

[0032] Table 1 ACF-SO after composite modification in ...

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Abstract

The invention discloses a modification method of an activated carbon fiber material. The method adopts polyacrylonitrile-based activated carbon fiber as a raw material, adopts a modification reagent soaking and heat treatment method to carry out composite modification, and prepares modified activated carbon fiber cloth through soaking, heat treatment, drying and other methods. According to the modification method, the adsorption capacity of the activated carbon fibers to pollution gas such as SO2 is further improved, finally, the activated carbon fiber cloth with excellent performance is prepared and serves as an insertion piece material of a mask, the performance of the mask for filtering poisonous and harmful gas such as SO2 and NOx is effectively improved, modification conditions are mild and environmentally friendly, the modified material is low in cost, and the product can better improve the life of people and meet the requirements of the public.

Description

technical field [0001] The invention belongs to the field of adsorption materials, and in particular relates to a method for modifying activated carbon fiber materials. Background technique [0002] With the rapid development of society and economy, the electricity consumption of residents and the energy consumption of enterprises and heavy industries continue to increase. Power plants, heavy industrial enterprises, etc. continuously emit SO 2 And other toxic and harmful gases, and the emissions are increasing day by day, which seriously affects people's quality of life. [0003] For this reason, people will wear masks when going out on a daily basis. At present, the mainstream masks sold on the market are dust masks, ordinary gauze masks and medical masks, which are difficult to absorb and filter SO 2 and other toxic and harmful gases. Although activated carbon masks can absorb and filter SO to a certain extent, 2 , but the filtering effect is poor and it is difficult ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D53/02F24F8/158
CPCB01J20/261B01J20/28023B01J20/20B01D53/02B01D2257/302
Inventor 董瑞婷罗涛朋
Owner NANCHANG NORMAL UNIV
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