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Absorbent cotton gauze containing nanometer silver and chitosan, preparation device as well as method thereof

A technology of chitosan and nano-silver, which is applied in textiles and papermaking, plant fiber, medical science, etc., can solve the problems of poor stability of nano-silver solution, high brittleness of chitosan film, inconvenient use and operation, etc., and achieve high-efficiency sterilization characteristics , good antibacterial performance, easy operation

Active Publication Date: 2011-07-13
INST OF BASIC MEDICAL SCI ACAD OF MILITARY MEDICAL SCI OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At that time, when the two were used alone, they had their own disadvantages. For example, the brittleness of the chitosan film was relatively large, and it was inconvenient to use and operate.
The stability of the nano-silver solution is poor, and when the solid is used, the nanoparticles will agglomerate and lose the characteristics of the nanometer

Method used

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  • Absorbent cotton gauze containing nanometer silver and chitosan, preparation device as well as method thereof
  • Absorbent cotton gauze containing nanometer silver and chitosan, preparation device as well as method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Prepare 50ml of acetic acid solution with a mass percentage concentration of 1%, weigh 1g of chitosan and dissolve it into it with magnetic stirring for 20min to fully dissolve it, and prepare a 2% chitosan solution with a mass concentration.

[0022] (2) Soak the absorbent cotton gauze in the chitosan solution for 6 hours.

[0023] (3) Arranging the absorbent cotton yarn treated in step (2) into pre-freezing for 12 hours at a temperature of -60°C.

[0024] (4) Arrange the pre-frozen degreased cotton yarn in a freeze dryer for freeze-drying for 48 hours.

[0025] (5) Soak the freeze-dried absorbent cotton yarn in 2% (wt) sodium hydroxide solution for 4 hours to remove residual acetic acid. After rinsing with deionized water, soak it in 2% (wt) sodium borohydride solution for 3 hours, repeatedly rinse with deionized water, soak until neutral, freeze-dry for the second time, and make degreasing cotton gauze containing chitosan.

[0026] (6) A certain amount of silve...

Embodiment 2

[0029] (1) Prepare 50ml of acetic acid solution with a mass percentage concentration of 1%, weigh 1g of chitosan and dissolve it into it with magnetic stirring for 20min to fully dissolve it, and prepare a 2% chitosan solution with a mass concentration.

[0030] (2) Soak the absorbent cotton gauze in the chitosan solution for 6 hours.

[0031] (3) Arranging the absorbent cotton yarn treated in step (2) into pre-freezing for 12 hours at a temperature of -60°C.

[0032] (4) Arrange the pre-frozen degreased cotton yarn in a freeze dryer for freeze-drying for 48 hours.

[0033] (5) Soak the freeze-dried absorbent cotton yarn in 2% (wt) sodium hydroxide solution for 4 hours to remove residual acetic acid. After rinsing with deionized water, soak it in 2% (wt) sodium borohydride solution for 3 hours, repeatedly rinse with deionized water, soak until neutral, freeze-dry for the second time, and make degreasing cotton gauze containing chitosan.

[0034] (6) A certain amount of silve...

Embodiment 3

[0037] (1) Prepare 50ml of acetic acid solution with a mass percentage concentration of 1%, weigh 1g of chitosan and dissolve it into it with magnetic stirring for 20min to fully dissolve it, and prepare a 2% chitosan solution with a mass concentration.

[0038] (2) Soak the absorbent cotton gauze in the chitosan solution for 6 hours.

[0039] (3) Arranging the absorbent cotton yarn treated in step (2) into pre-freezing for 12 hours at a temperature of -60°C.

[0040] (4) Arrange the pre-frozen degreased cotton yarn in a freeze dryer for freeze-drying for 48 hours.

[0041] (5) Soak the freeze-dried absorbent cotton yarn in 2% (wt) sodium hydroxide solution for 4 hours to remove residual acetic acid. After rinsing with deionized water, soak it in 2% (wt) sodium borohydride solution for 3 hours, repeatedly rinse with deionized water, soak until neutral, freeze-dry for the second time, and make degreasing cotton gauze containing chitosan.

[0042] (6) A certain amount of silve...

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Abstract

The invention discloses absorbent cotton gauze containing nanometer silver and chitosan, a preparation device as well as a method thereof, belonging to the technical field of medical dressing biological material preparation. The absorbent cotton gauze contains cation polysaccharide having excellent antibiosis and nanometer silver, wherein the chitosan is combined with the medical absorbent cottongauze by using the method of soaking and freeze drying, and the nanometer silver is absorbed on the gauze under the mutual action between nanometer silver grain and chitosan amino. The absorbent cotton gauze containing nanometer silver and chitosan provided by the invention has excellent air permeability and mechanical property, has lasting and efficient sterilization effect, can be conveniently used due to the excellent mechanical property, and is beneficial to the wound recovering.

Description

technical field [0001] The invention belongs to the technical field of preparation of medical dressing biological materials, and in particular relates to a degreased cotton gauze containing nano-silver and chitosan and a preparation device and method thereof. Background technique [0002] Nanomaterials with high air permeability and antibacterial properties are beneficial to wound tissue cell respiration, epithelial tissue growth and regeneration, thereby significantly promoting wound recovery. [0003] Chitosan is the only cationic polysaccharide in nature with good cytocompatibility and tissue compatibility. At the same time, it has strong antibacterial activity. Silver has been used as an antibacterial agent for centuries [Carbohydrate Research 344 (2009) 2375-2382], and the development of nanotechnology makes the use of silver as an antibacterial agent have potential advantages and broad applications. At that time, when the two were used alone, they had their own short...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L15/28A61L15/18A61L15/42D06M15/03D06M11/83D06M101/06
Inventor 王常勇李俊杰
Owner INST OF BASIC MEDICAL SCI ACAD OF MILITARY MEDICAL SCI OF PLA
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