Process for preparing antibacterial fibre of activated carbon containing nano silver particles

A technology of nano-silver particles and activated carbon fibers, applied in fiber processing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of unreported nanoparticles and increase the complexity of the process

Inactive Publication Date: 2002-10-30
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The latter method requires vacuum decomposition, which obviously increases the complexity of the process
Moreover, neither of these two methods reported that the silver on the prepared material was nanoparticle

Method used

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  • Process for preparing antibacterial fibre of activated carbon containing nano silver particles
  • Process for preparing antibacterial fibre of activated carbon containing nano silver particles

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Experimental program
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Embodiment 1

[0016] Using water vapor and phosphoric acid as activators, according to the method of the present invention, a series of sisal-based steam-activated activated carbon fibers SACF and phosphoric acid-activated activated carbon fibers HPSACF are prepared respectively by controlling the difference in activation time (15-120 minutes). Table 1 compares the sterilizing ability of these two series of silver-loaded activated carbon fibers. The initial concentration of E. coli in the solution = 5 × 10 8 cfu / ml (unit description: cfu is the abbreviation of English colony forming unit, which means colony forming unit, that is, the count of colonies), the contact reaction time is 8 hours, and the pH of the solution is 7.0. In the table, ∞ means that the number of bacteria is extremely large and cannot be counted (the same below). The results showed that all phosphoric acid-activated activated carbon fibers could completely kill Escherichia coli in the solution. Comparing the antibacteri...

Embodiment 2

[0019] Sisal fibers were soaked in 5% NaOH solution, then soaked in 30% phosphoric acid solution for 24 hours, and the fibers after the above treatment were carbonized and activated at 850°C for 1.5 hours under the protection of nitrogen to obtain a specific surface area of ​​800m 2 / g activated carbon fiber. After the activated carbon fiber was washed with dilute nitric acid, immersed in a solution containing 0.05% silver for 24 hours, the solution was filtered off, the fiber was fully washed, and vacuum-dried at low temperature to obtain activated carbon fiber HPSACF-80 with a silver loading of 20%. -Ag. In 20 ml containing E. coli count is 4 x 10 6 In the solution of cfu / ml, add this silver-loaded activated carbon fiber of different quality, the killing effect to Escherichia coli within 1 hour is as shown in Table 2. It can be seen from the data in the table that when the fiber dosage is only 20mg, the concentration of 20ml of bacteria-containing solution can be increased...

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Abstract

A process for preparing the antibacterial activated carbon fibres containing nano silver particles includes preparing the activated carbon fibres by using phosphoric acid as activator, and dipping for adsorbing the silver particles by said fibres. It can kill all the Escherichia coli and staphylococlus aureus in water. Its advantages are less consumption, and high, fost and durable antibacterial effect.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial active carbon fiber containing nano-silver particles. Background technique [0002] With the increasingly serious environmental pollution, conventional water treatment processes have been difficult to completely remove pollutants in water. Therefore, many water plants have increased the advanced treatment process on the basis of the original process. Activated carbon fiber (ACF), which has been developed in recent years, has excellent adsorption properties due to its large specific surface area and abundant micropores, and is gradually becoming a more effective disinfection contact purification material for advanced treatment of drinking water. Both the surface of activated carbon and activated carbon fiber are prone to the proliferation of microorganisms, which increases the possibility of microbial contamination. Previous studies have shown that silver can effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08D01F9/12D06M11/83
Inventor 陈水挟刘进荣曾汉民
Owner SUN YAT SEN UNIV
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