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.
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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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