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Antibiotic composite membrane of nano-silk fibroin-chitosan-nano-silver

A nano-silk fibroin and nano-silver antibacterial technology, applied in the field of antibacterial materials and nanomaterials, can solve the problems of strong permeability and migration, hidden dangers, easy failure, health and safety, etc., and achieve high antibacterial activity, long-lasting efficacy, and energy-saving effects. Good results

Inactive Publication Date: 2014-03-19
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With people's increasing requirements for various antibacterial materials, the development of antibacterial materials has received unprecedented attention. The focus of attention and the main growth point of demand are organic polymer antibacterial materials. Antibacterial polymer materials are now being widely developed. The technical route of adding inorganic salt antibacterial agents and organic compound antibacterial agents is adopted, but organic synthetic antibacterial additives are all organic compounds, which have strong volatility, permeability and migration, and are prone to failure and health and safety hazards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 A nano-silk fibroin-chitosan-nano-silver antibacterial composite film

[0021] Using nano-silk fibroin and chitosan to reduce silver nitrate in situ to prepare nano-silver, and further prepare nano-silk fibroin-nano-silver antibacterial composite film, the specific steps are as follows:

[0022] (1) Prepare a nano-silk fibroin aqueous solution with a mass concentration of 0.5%, and a chitosan aqueous solution with a mass concentration of 10%, add sodium hydroxide drop by drop under stirring, and adjust the pH of the solution to 7;

[0023] (2) Add silver nitrate to step (1) gained solution under stirring, obtain the mixed solution that silver nitrate concentration is 20 mmol / L, continue to stir 30min;

[0024] (3) The mixed solution obtained in step (2) is illuminated, and the light exposure time is 12 h to obtain a uniform nano-silk fibroin, chitosan, and nano-silver mixed solution;

[0025] (4) Add the mixed solution obtained in step (3) to the nano-silk fi...

Embodiment 2

[0026] Example 2 A nano-silk fibroin-chitosan-nano-silver antibacterial composite film

[0027] Using nano-silk fibroin and chitosan to reduce silver nitrate in situ to prepare nano-silver, and further prepare nano-silk fibroin-nano-silver antibacterial composite film, the specific steps are as follows:

[0028] (1) Prepare a nano-silk fibroin aqueous solution with a mass concentration of 3%, and a chitosan aqueous solution with a mass concentration of 8.5%, add sodium hydroxide drop by drop under stirring, and adjust the pH of the solution to 7;

[0029] (2) Add silver nitrate to step (1) gained solution under stirring, obtain the mixed solution that silver nitrate concentration is 45 mmol / L, continue to stir 30min;

[0030] (3) The mixed solution obtained in step (2) is illuminated, and the light exposure time is 15 h to obtain a uniform nano-silk fibroin, chitosan, and nano-silver mixed solution;

[0031] (4) Add the mixed solution obtained in step (3) to the nano-silk fib...

Embodiment 3

[0032] Embodiment 3 A kind of nano silk fibroin-chitosan-nano silver antibacterial composite film

[0033] Using nano-silk fibroin and chitosan to reduce silver nitrate in situ to prepare nano-silver, and further prepare nano-silk fibroin-nano-silver antibacterial composite film, the specific steps are as follows:

[0034] (1) Prepare a nano-silk fibroin aqueous solution with a mass concentration of 2%, and a chitosan aqueous solution with a mass concentration of 9.2%, add sodium hydroxide drop by drop under stirring, and adjust the pH of the solution to 8;

[0035] (2) Add silver nitrate to step (1) gained solution under stirring, obtain the mixed solution that silver nitrate concentration is 40mmol / L, continue to stir 30min;

[0036] (3) The mixed solution obtained in step (2) is illuminated, and the light exposure time is 20h to obtain a uniform mixed solution of nano-silk fibroin, chitosan, and nano-silver;

[0037] (4) Add the mixed solution obtained in step (3) to the n...

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PUM

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Abstract

The invention discloses an antibiotic composite membrane of nano-silk fibroin-chitosan-nano-silver and a preparation method thereof. Nano-silver is prepared by in-situ reduction of silver nitrate with nano-silk fibroin and chitosan, and then a nano-silk fibroin-nano-silver antibiotic composite membrane is prepared further. The antibiotic composite membrane is widely applicable to food packages, hygienic products, and medical materials.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and antibacterial materials, and in particular relates to a nanometer silk fibroin-chitosan-nanometer silver antibacterial composite membrane. Background technique [0002] Bacteria are ubiquitous and pervasive, and their spread and spread seriously threaten human health. With the extensive use of chemical drugs such as antibiotics, disinfectants and bactericides, more and more bacterial mutation populations caused by drug resistance have caused frequent global bacterial disasters. In order to suppress the occurrence of such bacterial disasters, it is imperative to develop and apply new antibacterial materials. At present, antibacterial materials are mainly divided into inorganic antibacterial materials, organic antibacterial materials, and organic-inorganic composite antibacterial materials. [0003] With people's increasing requirements for various antibacterial materials, the deve...

Claims

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Application Information

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IPC IPC(8): C08L5/08C08L89/00C08K3/08
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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