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Method for preparing chitosan/nylon composite antibacterial film containing silver ion

A compound antibacterial and chitosan technology, which is applied in the field of preparation of functional polymer composite films, can solve the problems of no antibacterial performance, no research on antibacterial performance, and unsuitable packaging materials, etc., to achieve durable and efficient antibacterial effect and good antibacterial performance , good chemical stability and biocompatibility

Inactive Publication Date: 2008-02-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ping-Chung Kuo etc. blended chitosan and nylon 11 into a film, which greatly improved the degradation rate of nylon 11, but did not study its antibacterial properties [Ping-Chung Kuo, Diptiranjan Sahu, Hsin Her Yu.Properties and biodegradability of chitosan / nylon 11 blending films.PolymerDegradation and Stability91(2006)3097e3102]; Chinese patent CN1413760A obtains a composite membrane by coupling chitosan on a nylon membrane, improves the number of active groups, and is used for affinity microfiltration, but the membrane-forming method It is relatively complicated and does not involve its antibacterial performance; Chinese patent CN1537630A is to add silver ions in the bamboo vinegar solution of chitosan to obtain a compound agent with better antibacterial effect, which is used for the treatment of beriberi, but it is a kind of glue, and its strength is low. It is not suitable for packaging materials, and its application in coatings and wound dressings is also greatly limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Preparation of chitosan / nylon blend membrane

[0019] 2 grams of chitosan, nylon-60.2 grams, dissolved in 97.8 grams of 80wt% formic acid, stirred evenly, vacuum degree 0.07MPa defoaming 1 hour, the above solution is coated on a smooth glass plate, placed in a fume hood , the solvent was evaporated at room temperature for 72 hours, and the film was naturally peeled off, immersed in 1wt% sodium hydroxide solution for 1 hour, washed with deionized water until neutral, and naturally dried at room temperature to obtain a chitosan / nylon blend film.

[0020] 2. Preparation of chitosan / nylon composite antibacterial film containing silver ions

[0021] Immerse the above-mentioned chitosan / nylon blend membrane in 60 mL of silver nitrate aqueous solution with a concentration of 0.5 mmol / L, stir for 4 hours, rinse repeatedly with distilled water, and dry naturally at room temperature to obtain chitosan / nylon containing silver ions. Composite antibacterial film. The composite ...

Embodiment 2

[0023] 1. Preparation of chitosan / nylon blend membrane

[0024] 4 grams of chitosan, 9 grams of nylon-66, were dissolved in 87 grams of 90wt% formic acid, stirred evenly, vacuum degree 0.09MP defoaming 0.5 hour, the solution was coated on a smooth glass plate, placed in a fume hood , the solvent was evaporated at room temperature for 48 hours, and the film was naturally peeled off, immersed in 2wt% sodium hydroxide solution for 2 hours, washed with distilled water until neutral, and naturally dried at room temperature to obtain a chitosan / nylon blend film.

[0025] 2. Preparation of chitosan / nylon composite antibacterial film containing silver ions

[0026] Immerse the above-mentioned chitosan / nylon blend membrane in 50 mL of silver nitrate aqueous solution with a concentration of 0.8 mmol / L, stir for 6 hours, rinse repeatedly with distilled water, and dry naturally at room temperature to obtain chitosan / nylon containing silver ions. Composite antibacterial film. The composi...

Embodiment 3

[0028] 1. Preparation of chitosan / nylon blend membrane

[0029] 2 grams of chitosan, 0.9 grams of nylon-6, were dissolved in 97.1 grams of 90wt% formic acid, stirred evenly, vacuum degree 0.08MPa defoaming 1 hour, the solution was coated on a smooth glass plate, placed in a fume hood , the solvent was evaporated at room temperature for 56 hours, and the film was naturally peeled off, immersed in 2.5wt% sodium hydroxide solution for 1.5 hours, washed to neutral with distilled water, and naturally dried at room temperature to obtain a chitosan / nylon blend film.

[0030] 2. Preparation of chitosan / nylon composite antibacterial film containing silver ions

[0031] Immerse the above-mentioned chitosan / nylon blend membrane in 40 mL of silver nitrate aqueous solution with a concentration of 0.8mmol / L, stir for 4 hours, rinse repeatedly with distilled water, and dry naturally at room temperature to obtain chitosan / nylon containing silver ions. Composite antibacterial film. The compo...

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Abstract

The invention relates to a preparation method of chitosan / nylon compound antibacterium film that contains silver ion which is characterized in that 2-4 portions of the chitosan and 0.2-9 portions of nylon by weight are dissolved in 80-100wt percent formic acid with 97.8-87 portions by weight, stirred evenly and kept for deaeration for 0.5-1 hour at a vacuum degree of 0.07-0.09MPa, then the solution is coated on a lubricous glass sheet that is put in a ventilated cabinet for evaporation for 48-72 hours at room temperature till the film removes automatically, then the mixing film is soaked in 1-3wt percent sodium hydroxide solution for 1-2 hours to remove residue solution, and washed repeatedly with distilled water to be neutral, then chitosan / nylon mixing film is prepared upon natural drying; then the chitosan / nylon mixing film is soaked in 40-60mL silver nitrate solution with the concentration of 0.2-0.8mmol / L and stirred for 4-6 hours to remove the residue silver ion by deionized water and dried at room temperature, and the chitosan / nylon compound antibacterium film that contains silver ion is prepared.

Description

technical field [0001] The invention relates to a preparation method of a chitosan / nylon composite antibacterial film containing silver ions, and belongs to the field of preparation of functional polymer composite films. Background technique [0002] Metallic silver ion is recognized as the strongest antibacterial metal. Chitosan also has broad-spectrum antibacterial properties and can form a stable complex with silver ions. It has stronger antibacterial ability and longer-lasting antibacterial effect. Sugar also has excellent hemocompatibility and tissue compatibility. As a general engineering plastic, nylon has excellent comprehensive properties such as good elasticity, high strength, good toughness and high tear strength. Ping-Chung Kuo etc. blended chitosan and nylon 11 into a film, which greatly improved the degradation rate of nylon 11, but did not study its antibacterial properties [Ping-Chung Kuo, Diptiranjan Sahu, Hsin Her Yu.Properties and biodegradability of chit...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/08C08L77/00C08K3/28
Inventor 赵长生马云利白鹏利余彬玉李浩程魏强张小华
Owner SICHUAN UNIV