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Antibacterial active carbon fiber coated by chitosan porous membrane and process for preparing same

The technology of activated carbon fiber and activated carbon fiber felt is applied in the field of antibacterial activated carbon fiber coated with chitosan porous film and its preparation field, and achieves the effects of lasting antibacterial effect, promoting wound healing, and excellent adsorption and flocculation performance.

Inactive Publication Date: 2006-10-04
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a chitosan porous film-coated antibacterial activated carbon fiber and a preparation method thereof to solve the existing problems of the existing antibacterial activated carbon fiber in terms of durability, safety and recycling

Method used

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  • Antibacterial active carbon fiber coated by chitosan porous membrane and process for preparing same
  • Antibacterial active carbon fiber coated by chitosan porous membrane and process for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Preparation of Antibacterial Activated Carbon Fibers

[0018] Weigh 0.5g of chitosan with a molecular weight of 550kD, dissolve it in 50mL of acetic acid solution with a volume fraction of 1%, and prepare a chitosan-acetic acid solution with a concentration of 10g / L, then add 0.1mL of 30% H 2 o 2 solution. Take 1.02g specific surface area as 968m 2 The polyvinyl alcohol-based activated carbon fibers per gram were soaked in the above-mentioned chitosan solution at 60°C for 0.5 hours, the activated carbon fibers were taken out and dried by centrifugation, then soaked in a dilute alkali solution with a mass fraction of 1% and washed until neutral, and centrifuged again After drying, vacuum-dry at 60° C. to constant weight to obtain 1.12 g of antibacterial activated carbon fibers coated with chitosan film.

[0019] According to the mass calculation of activated carbon fibers before and after treatment, the weight fraction of chitosan in the obtained chitosan porous me...

Embodiment 2

[0036] Weigh 1.5g of chitosan with a molecular weight of 100kD, dissolve it in 50mL of 1% acetic acid solution by volume fraction, and prepare a chitosan-acetic acid solution with a concentration of 30g / L. Take the specific surface area as 968m 2 The polyvinyl alcohol-based activated carbon fiber of / g is soaked in the above-mentioned chitosan solution according to the same method as in Example 1, to obtain the antibacterial activated carbon fiber coated with chitosan film.

[0037] The weight fraction of chitosan in the obtained antibacterial activated carbon fiber is 5%; By carrying out field emission scanning electron microscopy to the activated carbon fiber surface topography before and after the chitosan porous membrane coating, it can be known that the thickness of the chitosan porous membrane on the fiber is The membrane is covered with slit-shaped holes about 10-50nm in length and 10nm in width.

[0038] According to the antibacterial performance test, when the concen...

Embodiment 3

[0040] Weigh 1.0g of chitosan with a molecular weight of 550kD, dissolve it in 50mL of acetic acid solution with a volume fraction of 1%, and prepare a chitosan-acetic acid solution with a concentration of 20g / L, then add 0.1mL of 30% H 2 o 2 solution. With a specific surface area of ​​400m 2 The pitch-based activated carbon fiber felt of / g is base material, prepares antibacterial activated carbon fiber felt according to the method identical with embodiment 1.

[0041] The weight fraction of chitosan in the antibacterial activated carbon fiber felt coated with chitosan porous membrane obtained is 29%; by field emission scanning electron microscope observation of the activated carbon fiber felt surface morphology before and after chitosan porous membrane coating, it can be seen that The thickness of the chitosan porous membrane on the antibacterial activated carbon fiber felt is about 2 μm, and the membrane is covered with slit-shaped holes with a length of about 10-30 nm an...

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Abstract

The invention discloses an anti-bacterial activated carbon fibre covers with chitose porous membrane and preparing method, which comprises the following steps: dissolving chitose in alcaine or acetate water solution; preparing the 10-30g / L chitose acid solution; soaking the activated carbon fibre in chitose acid solution and draining; soaking with queous alkali and washing to neutral; draining; vacuum drying to constant weight; getting percent by weight of chitose of anti-bacterial activated carbon fibre is 5%-30%; Loading the 50nm-2 mum porous membrane on the activated carbon fibre surface. The invention solves the problems of durability, safety and re-use of the anti-bacterial activated carbon fibre; the invention can be used for personal protective device.

Description

Technical field: [0001] The invention belongs to the field of antibacterial adsorption materials, in particular to an antibacterial active carbon fiber coated with a chitosan porous film with chitosan as an antibacterial component and a preparation method thereof. Background technique: [0002] "High-Tech Fibers and Applications" 1996, No. 9-10, pages 26-32, reported the technology of preparing antibacterial activated carbon fibers by loading silver onto activated carbon fibers by impregnation or mixing. On the silver-loaded activated carbon fibers obtained by the impregnation method, the silver particles generated by the reduction of the activated carbon fibers are only mechanically attached to the outer surface of the activated carbon fibers, and the combination between the silver particles and the activated carbon fibers is loose. When it is applied to water purification, the silver particles will fall off under the water pressure, and the antibacterial effect will not la...

Claims

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Application Information

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IPC IPC(8): D06M15/03D06M101/40
Inventor 俞汉青张淑娟石先阳
Owner UNIV OF SCI & TECH OF CHINA
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