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Silver nanoparticle-containing bacterial cellulose membrane and preparation method thereof

A technology of bacterial cellulose film and silver nanoparticles, which is used in medical science, bandages, absorbent pads, etc., can solve problems such as incompatibility and high human toxicity, and achieve the effects of convenient operation, controllable moisture content and good air permeability.

Inactive Publication Date: 2011-10-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the above studies used NaBH 4 , formaldehyde and other chemical reagents are reducing agents, these reagents usually have high human toxicity, it is difficult to solve the problem of reagent residue in the fiber membrane after the reaction, especially not suitable for the preparation of biomedical material products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Acetobacter xylinum was fermented to prepare bacterial cellulose membrane, which was boiled in high-temperature water and then boiled in high-temperature alkali successively, and then soaked in 0.1 mol / l silver nitrate solution for 1 hour. Then the surface of the bacterial cellulose membrane was washed twice with distilled water, and the bacterial cellulose membrane was placed flat under a 254nm ultraviolet lamp and irradiated for 4 hours. The obtained bacterial cellulose film is freeze-dried to obtain a bacterial cellulose dry film containing silver nanoparticles with a water content close to 0%.

Embodiment 2

[0023] Acetogenes was fermented to prepare the bacterial cellulose membrane, which was boiled in high temperature water and alkali boiled in high temperature successively, and then soaked in 0.0001mol / l silver nitrate solution for 5 hours. Then the surface of the bacterial cellulose membrane was cleaned with distilled water, and the bacterial cellulose membrane was placed flat under a 365nm ultraviolet lamp and irradiated for 0.5 hours. The obtained bacterial cellulose membrane was vacuum-dried for 6 hours for partial dehydration to obtain a bacterial cellulose membrane containing silver nanoparticles with a moisture content of 10%.

Embodiment 3

[0025] The bacterial cellulose membrane was prepared by fermenting the bacteria Acetobacter, followed by high-temperature water boiling and high-temperature alkali boiling, and then soaking in 0.2 mol / l silver nitrate solution for 4 hours. Then the surface of the bacterial cellulose membrane was cleaned with distilled water, and the bacterial cellulose membrane was placed flat under a 254nm ultraviolet lamp and irradiated for 6 hours. The obtained bacterial cellulose membrane is centrifuged to remove part of the moisture, and the bacterial cellulose membrane containing silver nano particles with a moisture content of 95% is obtained.

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PUM

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Abstract

The invention relates to a silver nanoparticle-containing bacterial cellulose membrane and a preparation method thereof. Silver nanoparticles in the bacterial cellulose membrane are attached to the microfiber surface of a three-dimensional network structure of the bacterial cellulose membrane, and the silver nanoparticles are in an amount which is 0.1 to 15 percent of the total weight of the cellulose membrane and have the particle size of between 8 and 50nm. The preparation method comprises the following steps of: soaking the bacterial cellulose membrane in silver salt solution at room temperature for 10 minutes to 5 hours and taking the soaked membrane out; cleaning the surface of the bacterial cellulose membrane by using distilled water; irradiating by an ultraviolet radiation method for 0.5 to 6 hours to obtain a silver nanoparticle-containing bacterial cellulose wet membrane; and performing dehydration treatment to obtain the silver nanoparticle-containing bacterial cellulose membrane. The bacterial cellulose membrane has high bacteria resistance, high air permeability, high water-holding capacity and controllable moisture content and is suitable to be used as a trauma medical dressing; and in the invention, a chemical reduction reagent is not required to be added, an environment-friendly and safe process condition is realized, and equipment is simple and pollution-free.

Description

technical field [0001] The invention belongs to the field of composite materials containing silver nanoparticles, in particular to a bacterial cellulose film containing silver nanoparticles and a preparation method thereof. Background technique [0002] Bacterial cellulose is a high-purity cellulose synthesized by microorganisms, and its microfiber diameter is only 40-60nm, which is the finest nanomaterial in nature. The microfiber network structure makes it have high specific surface area, high water holding capacity, good biocompatibility and biodegradability, and is called "natural biomedical material endowed by nature to human beings". A large number of studies and clinical trials have shown that bacterial cellulose-based wound dressings have good healing effects on burns, scalds and chronic ulcer diseases. For example, the treatment cycle of chronic venous ulcers of lower extremities using wet bacterial cellulose membranes only takes 14 weeks, while the hydrocolloid dr...

Claims

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Application Information

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IPC IPC(8): C08J7/00C08L1/02A61L15/28A61L15/44
Inventor 杨光谢健健张文怡孙丹万凌雁吴一伦汤淼
Owner DONGHUA UNIV
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