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.
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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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