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Nano-silver loaded activated carbon fiber and preparation method thereof

A technology of activated carbon fiber and nano-silver, applied in the direction of carbon fiber, fiber treatment, separation method, etc., can solve the problems of limited silver loading, reduced sterilization and antibacterial performance, low silver loading, etc., and achieves non-toxic reducing agent and increased dispersibility. , the effect of the simple method

Inactive Publication Date: 2017-07-18
北京璟胜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the nano-silver particles on the activated carbon loaded with nano-silver are seriously agglomerated, and the particle distribution is uneven. The nano-silver is mainly distributed on the surface of the activated carbon, and the distribution of nano-silver in the internal pores is less, which leads to low silver loading and reduced bactericidal and antibacterial performance; , due to the super adsorption of activated carbon, the impurity compounds and ions adsorbed inside the activated carbon remain seriously, which affects the water treatment effect. These impurity compounds and ions are brought in by the complex of reduced monovalent silver
[0006] The method disclosed in the Chinese patent "A Method for Making Coconut Charcoal Nano-Silver Activated Carbon" (publication number: CNI04190357A): coconut shell activated carbon with high specific surface area and porosity is used, and the pretreatment is carried out by hydrochloric acid pickling, which plays a certain role in dredging activated carbon. The role of pores and channels, but this has little effect on the hydrophilic modification of activated carbon, the increase of specific surface area and pore volume, so it is very limited to increase the amount of silver loaded
The improvement of this invention is that the preparation process of nano-silver is independent of the activated carbon adsorption process, and high-purity nano-silver particles are obtained, which effectively avoids the interference of other impurity compounds and ions, but the nano-silver particles are not formulated into more Stable and uniform nano-silver colloidal solution, so that the nano-silver particles cannot be fully compatible and contacted with the activated carbon fiber and Brownian diffuses into the pores, and the final adsorption mainly stays on the surface of the activated carbon, reducing the amount of silver loaded, and the loss of silver cannot be ignored

Method used

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  • Nano-silver loaded activated carbon fiber and preparation method thereof
  • Nano-silver loaded activated carbon fiber and preparation method thereof
  • Nano-silver loaded activated carbon fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Impregnation of activated carbon fibers

[0048] Weigh 0.7910g of silver nitrate and add it to 100ml of deionized water, and stir magnetically for 30min to obtain a silver source solution with a mass concentration of 0.5%. Select viscose-based SY-1500 activated carbon fiber (Shanghai Lianbing Environmental Protection, specific surface area 1300-1400m 2 / g, average pore size 17-20A. ) 4g, cut into 5cm 2 / piece, dipped into the silver source solution, fully stirred by magnetic force at room temperature for 2 hours, and the rotation speed was 500rpm.

[0049] (2) Reduction of silver

[0050] The activated carbon fibers obtained by the above impregnation are put into a vacuum drying oven, dried at 80°C, then placed in 60ml of acetone, placed in a water bath, heated at 80°C, and magnetically stirred for 10 minutes at the same time. The stirring speed is 1000rpm; Dissolve 0.1662g of lauric acid in 20ml of deionized water, dissolve 0.0961g of stearic acid in 12ml of de...

Embodiment 2

[0053] (1) Impregnation of activated carbon fibers

[0054] Weigh 3.7868g of silver acetate and add it to 110ml of deionized water, and stir it magnetically for 30 minutes to obtain a silver source solution with a mass concentration of 2%. 2 / g, average pore size 17-20A. ) 4g, cut into 5cm 2 / piece, dipped into the silver source solution, fully stirred by magnetic force at room temperature for 2 hours, and the rotation speed was 500rpm.

[0055] (2) Reduction of silver

[0056] The activated carbon fibers obtained by the above impregnation are put into a vacuum drying oven, dried at 80°C, then placed in 80ml of acetone, placed in a water bath, heated at 80°C, and magnetically stirred for 10 minutes at the same time. The stirring speed is 1000rpm; Dissolve 0.1729g of lauric acid in 18ml of deionized water, dissolve 0.1192g of stearic acid in 12ml of deionized water, dissolve 0.1571g of polyvinylpyrrolidone in 10ml of deionized water, and dissolve the three protective agent ...

Embodiment 3

[0059] (1) Impregnation of activated carbon fibers

[0060] Weigh 4.3752g of silver acetate and add it to 120ml of deionized water, and stir magnetically for 35min to obtain a silver source solution with a mass concentration of 3%. Select polyacrylonitrile-based activated carbon fibers (PAN-ACF, single filament diameter 8-10μm, Nantong Senyou carbon Fiber Limited) 4g, cut into 5cm 2 / piece, dipped into the silver source solution, fully stirred by magnetic force at room temperature for 2 hours, and the rotation speed was 500rpm.

[0061] (2) Reduction of silver

[0062] The activated carbon fibers obtained by the above impregnation are put into a vacuum drying oven, dried at 80°C, then placed in 70ml of acetone, placed in a water bath, heated at 80°C, and magnetically stirred for 12 minutes at the same time. The stirring speed is 1000rpm; Dissolve 0.1964g of lauric acid in 20ml of deionized water, dissolve 0.1163g of stearic acid in 10ml of deionized water, dissolve 0.1782g ...

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Abstract

The invention discloses a nano-silver loaded activated carbon fiber and a preparation method thereof. The preparation method comprises the following steps: (1) taking AgNO3 or CH3COOAg as a silver source; (2) utilizing a mixed solution of stearic acid, lauric acid and polyvinylpyrrolidone as a protecting agent; (3) taking the mixed solution of glycol, formaldehyde and glucose as a reducing agent; (4) fully dipping an activated carbon fiber in the AgNO3 or CH3COOAg solution, thereby loading silver ions on the surface of the activated carbon fiber; and (5) in an acetone system, utilizing the reducing agent to reduce the silver ions on the surface of the activated carbon fiber, thereby generating nano-silver particles on the surface of the activated carbon fiber. The product disclosed by the invention is characterized by adjustable silver loading capacity, monomer silver particle diameter of 10-20 nanometers, application to the filtering and sterilizing technology for drinking water and efficient function of killing escherichia coli and staphylococcus aureus in water. Besides, the nano-silver loaded activated carbon fiber has higher application value in improving water chrominance and turbidity and reducing residual chlorine in water.

Description

technical field [0001] The invention relates to an activated carbon fiber loaded with nano silver and a preparation method thereof, belonging to the technical field of activated carbon fiber preparation. Background technique [0002] At present, our country has entered a new stage of development, and its comprehensive national strength has increased. However, the environmental problems brought about by it have attracted widespread attention, especially the various pollutions brought about by the rapid development of industry, which have seriously affected drinking water sources. Safety. In addition, various fungi that grow in water are also threatening people's health. [0003] Because activated carbon (AC) has a huge specific surface area and developed pore structure, it is easy to adsorb pathogenic microorganisms in water. However, in the process of deep purification of drinking water, pathogenic microorganisms in the water can easily multiply on the surface of activated...

Claims

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Application Information

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IPC IPC(8): D06M11/83B01D39/20C02F1/50D06M101/40
CPCB01D39/2017C02F1/50D06M11/83D06M2101/40
Inventor 张华伟
Owner 北京璟胜科技有限公司
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