Nano-silver composite antibacterial cellulose membrane, and preparation method and application thereof

A cellulose film and composite antibacterial technology, applied in the direction of coating, etc., can solve the problems of poor sterilization effect, coarse particles, uneven dispersion of nano-silver, etc., and achieve good antibacterial effect, high specific surface area, and simple reduction method.

Inactive Publication Date: 2016-07-20
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the antibacterial effect of the paper is improved by this method, it mainly acts on the paper base instead of the film, and the material used is a dispersion of silver, using nano silver with a diameter of about 2 microns, the particles are thicker, and the bacteria can be sterilized. The effect is poor, and the dispersion of nano-silver is uneven

Method used

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  • Nano-silver composite antibacterial cellulose membrane, and preparation method and application thereof
  • Nano-silver composite antibacterial cellulose membrane, and preparation method and application thereof
  • Nano-silver composite antibacterial cellulose membrane, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0044] The preparation method of nano-silver composite antibacterial cellulose film of the present invention, comprises the following steps:

[0045] (1) Spray the nanocellulose membrane substrate with 100mmol / L silver nitrate solution until the substrate is saturated with moisture;

[0046] (2) Put the moisture-absorbing saturated substrate in a cool place and dry it at room temperature (25°C) for 20 minutes to remove the moisture from the moisture-absorbing saturated substrate, that is, there is no water film on the surface of the substrate, and no water droplets appear by extrusion, and the substrate is incomplete Dry;

[0047] (3) Spray or directly impregnate the base material in step (2) with 50mmol / L ascorbic acid solution, until the base material is just fully soaked, observe the color change of the base material;

[0048] (4) Take out the base material that has completely turned brown, wash it with water three times, and dry it naturally for 24 hours to obtain the nan...

Embodiment 2

[0051] The preparation method of nano-silver composite antibacterial cellulose film of the present invention, comprises the following steps:

[0052] (1) Spray the micron cellulose membrane substrate with 100mmol / L silver nitrate solution until the substrate is saturated with moisture;

[0053](2) Put the moisture-absorbing saturated substrate in a cool place and dry it at room temperature (25°C) for 20 minutes to remove the moisture from the moisture-absorbing saturated substrate, that is, there is no water film on the surface of the substrate, and no water droplets appear by extrusion, and the substrate is incomplete Dry;

[0054] (3) Spray or directly impregnate the base material in step (2) with 50mmol / L glucose solution until the base material is just fully soaked, and observe the color change of the base material;

[0055] (4) Take out the base material that has completely turned brown, wash it with water three times, and dry it naturally for 12 hours to obtain the nano...

Embodiment 3

[0058] The preparation method of nano-silver composite antibacterial cellulose film of the present invention, comprises the following steps:

[0059] (1) Spray the micron cellulose membrane substrate with 10mmol / L silver nitrate solution until the substrate is saturated with moisture;

[0060] (2) Put the moisture-absorbing saturated substrate in a cool place and dry it at room temperature (25°C) for 20 minutes to remove the moisture from the moisture-absorbing saturated substrate, that is, there is no water film on the surface of the substrate, and no water droplets appear by extrusion, and the substrate is incomplete Dry;

[0061] (3) Spray or directly immerse the base material in step (2) until the base material is completely soaked with 10mmol / L sodium borohydride solution, and observe the color change of the base material;

[0062] (4) Take out the base material that has completely turned brown, wash it with distilled water three times, and dry it naturally for 24 hours ...

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Abstract

The invention discloses a nano-silver composite antibacterial cellulose membrane, and a preparation method and an application thereof. The preparation method comprises the following steps: (1) a cellulose membrane is prepared with uniformly dispersed nano/micron cellulose; (2) a silver nitrate solution is uniformly sprayed onto a membrane substrate, and the membrane substrate is wetted until saturated; (3) water in the wetted and saturated membrane substrate is removed with a physical method, wherein the membrane substrate is not completely dried; (4) a reducing agent solution is sprayed onto the membrane substrate obtained in the step (3), until the membrane substrate is completely impregnated; and (5) when color is completely changed, the membrane substrate is taken out; the taken-out membrane substrate is washed and the washed membrane substrate is dried, such that the nano-silver composite antibacterial cellulose membrane is obtained. The preparation method provided by the invention is simple. With the method, nano-silver loading amount and distribution are easy to control. The nano-silver has the advantages of small size, uniform dispersion, good antibacterial effects, good bonding strength, and high stability. The original quality of the nano or micron cellulose is not influenced. The prepared membrane is suitable to be applied in the fields such as traumatic wound, medical care and antibacterial packaging.

Description

technical field [0001] The invention belongs to the technical field of nano-cellulose application, and in particular relates to a nano-silver composite antibacterial cellulose film and its preparation method and application. Background technique [0002] Nano-silver is an antibacterial agent. The particle size of nano-silver is mostly around 25 nanometers. It has a strong inhibitory and killing effect on dozens of pathogenic microorganisms such as Escherichia coli, Neisseria gonorrhoeae, and Chlamydia trachomatis, and will not produce drug resistance. Properties, nano-silver is a powdered silver element, the particle size is less than 100nm, generally between 25-50nm. The performance of nano-silver is directly related to its particle size. Among them, the smaller the particle size, the larger the specific surface area, the more opportunities to contact the acting objects, and the stronger the bactericidal performance. [0003] The principle of nano-silver sterilization is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/06C08L1/02
Inventor 颜进华
Owner GUANGDONG IND TECHN COLLEGE
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