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Antibacterial fiber dressing containing nanometer metal and preparation method thereof

A nano-metal and nano-metal particle technology, applied in medical science, bandages, absorbent pads, etc., can solve problems such as non-softness, hard fibers or dressings, and difficulty in covering wounds, preventing infection, long-term and effective antibacterial effect of function

Inactive Publication Date: 2012-08-15
FOSHAN UNITED MEDICAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These fibers will become colloid when exposed to water. Even after spraying a small amount of nano-water solution and drying, the fibers or dressings feel very hard and not soft, and it is difficult to stick on the wound so that it can no longer be used as a wound dressing.

Method used

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  • Antibacterial fiber dressing containing nanometer metal and preparation method thereof
  • Antibacterial fiber dressing containing nanometer metal and preparation method thereof
  • Antibacterial fiber dressing containing nanometer metal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Prepare the antibacterial chitosan fiber containing 0.5% nano silver and the method for wound dressing thereof:

[0060] 1. In the usual chitosan spinning process, calculate the dry weight of the tow, for example, 6 g / m.

[0061] 2. Check the line speed, the unit is m / min, for example, 20 m / min. This gives a total dry weight of the filament tow per minute, i.e. 120 g / min.

[0062] 3. Prepare the required amount of water for the solution that can be sprayed onto the surface of the tow during spinning. The higher the silver concentration in the solution, the better. In this example, the prepared solution containing nano-silver has a concentration of 20%, and the nominal particle size of the silver particles is 5 nm.

[0063] 4. The nano-silver powder (5nm in particle size, D95=3.7-6.9) is firstly dispersed in an aqueous solution with an ultrasonic instrument (25-50 Hz), and the aqueous solution contains 20% by weight of nano-silver. .

[0064] 5. Adjust the moving sp...

Embodiment 2

[0068] In order to observe the antibacterial performance of the dressing, a certain amount of Escherichia coli was evenly coated in a petri dish, and then the dressing obtained in Example 1 was cut into 2 × 2 cm and put into it, and continuously cultivated at a constant temperature of 37 ° C for 7 days, every day Observe the bacterial growth on each plate. figure 1 shows the zone of inhibition of dressings containing 0.5% by weight nanosilver in E. coli dishes after 1 day, figure 2 Zones of inhibition of dressings containing 0.5% by weight nanosilver in E. coli dishes after 7 days are shown. It can be seen that the dressing containing 0.5% by weight nano-silver still has good antibacterial properties after 7 days.

Embodiment 3

[0070] The method for preparing the antibacterial calcium alginate fiber containing 10% nanometer copper and its wound dressing:

[0071] 1. In the usual calcium alginate spinning process, calculate the dry weight of the tow, for example, 11.5 g / m.

[0072] 2. Check the line speed, the unit is m / min, for example, 22 m / min. The total dry weight of the tow per minute was found to be 253 g / min.

[0073] 3. Since calcium alginate can form a gel when it meets water, acetone or other organic solvents should be used as the medium. Prepare 500 grams of acetone liquid and 200 grams of nano-copper powder (the size range of copper-silver particles is 10-40nm).

[0074] 4. The nano-copper powder is firstly dispersed in an acetone solution with an ultrasonic instrument (25-50 Hz), and the solution contains 40% by weight of nano-copper.

[0075] 5. Adjust the nozzle so that the spray rate is approximately 63 g / min. And the solution is sprayed on the surface of the tow at a constant spee...

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Abstract

The invention relates to an antibacterial fiber dressing containing nanometer metal and a preparation method thereof. Nanometer metal particles are distributed on the fiber surface of the dressing. The content of the nanometer metal is 0.5-10 wt%. As a dressing for wound treatment, the fiber wound dressing has the capability of continuously releasing sufficient nanometer metal particles, is especially suitable for chronic wound treatment, can provide long-term and effective antibacterial functions, and can effectively prevent wound infection caused by various bacteria and microbe.

Description

technical field [0001] The invention relates to an antibacterial fiber dressing containing nanometer metal and a preparation method thereof. Background technique [0002] Silver and copper are well known, and silver in particular has long been recognized for its potent antimicrobial properties, particularly against some of the bacteria commonly found in the care of chronic wounds. Moreover, the bactericidal effect of silver on certain antibiotic-resistant bacteria has been shown. At present, the most common antibacterial silver-containing dressings are divided into ionic type and nano-metal type. The use of silver ion technology is to provide silver ions to the wound dressing used through a silver compound, and the use of nano-metal technology is to make nano Metals such as nanoparticles of silver are applied to the wound dressing. [0003] When preparing antibacterial fibrous wound dressings, the prior art mainly adopts the following two methods. One is to dissolve (or d...

Claims

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Application Information

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IPC IPC(8): A61L15/44A61L15/28
CPCA61L2300/404A61L15/18A61L15/46A61L2300/102A61L2300/104
Inventor 王晓东莫小慧史福军
Owner FOSHAN UNITED MEDICAL TECH
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