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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[0020] Example 1
[0021] Acetobacter xylinum was fermented to prepare bacterial cellulose membrane, which was subjected to high-temperature boiling and high-temperature alkaline boiling, and then placed in a 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 254 nm ultraviolet lamp for 4 hours. The obtained bacterial cellulose film is freeze-dried to obtain a dry film of bacterial cellulose containing silver nanoparticles with a water content close to 0%.
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[0022] Example 2
[0023] Acetobacter is fermented to prepare a bacterial cellulose membrane, followed by high-temperature boiling and high-temperature alkaline boiling, and then soaking in a 0.0001mol / l silver nitrate solution for 5 hours. Then wash the surface of the bacterial cellulose membrane with distilled water, and place the bacterial cellulose membrane flat under a 365nm UV lamp 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%.
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[0024] Example 3
[0025] The bacterial cellulose membrane is prepared by fermenting the acetobacter bacteria, which is subjected to high-temperature boiling and high-temperature alkaline boiling, and then immersed in a 0.2mol / l silver nitrate solution for 4 hours. Then, the surface of the bacterial cellulose membrane was washed with distilled water, and the bacterial cellulose membrane was placed flat under a 254 nm ultraviolet lamp for 6 hours. Centrifuging the obtained bacterial cellulose membrane to remove part of the water, that is, a bacterial cellulose membrane with a moisture content of 95% containing silver nanoparticles is obtained.
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