Natural macromolecule/inorganic nanometer antibacterial composite material and preparation method thereof
A natural polymer and inorganic nano technology, applied in the field of natural polymer/inorganic nano antibacterial composite materials and their preparation, can solve the problems of nanoparticle agglomeration and affecting the antibacterial effect of nano antibacterial materials, and achieve good antibacterial performance and good killing High effect, stable effect
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Embodiment 1
[0032] Dissolve 100g of peach gum in 1L of distilled water, remove residual bark and other impurities after the peach gum is swollen, then put the remaining peach gum hydrosol in an oven and dry at 60°C for 36h, after drying, crush it with a pulverizer, and use a 250-mesh Sieve through a sieve to obtain peach gum powder with a particle size less than 3 μm. Take 2 g of peach gum powder and dissolve it in 400 mL of water. After it is completely dissolved, put it in a centrifuge at 3000 rpm for 2 minutes, and take the supernatant to obtain 360 mL of peach gum hydrosol.
[0033] Add 0.048g of silver nitrate to 200mL of the above peach gum hydrosol, stir at room temperature (25°C), heat and stir in a magnetic heating stirrer after it dissolves, set the temperature to 100°C, react for 3 hours, cool to room temperature, And dilute with water to obtain a golden yellow nano-silver sol with a concentration of 168mg / L.
[0034] Add 3mL of acetic acid and 0.25g of chitosan to 100mL of di...
Embodiment 2
[0047] Dissolve 100g of peach gum in 1L of distilled water, remove residual bark and other impurities after the peach gum is swollen, then put the remaining peach gum hydrosol in an oven and dry at 60°C for 36h, after drying, crush it with a pulverizer, and use a 250-mesh Sieve through a sieve to obtain peach gum powder with a particle size less than 3 μm. Take 2 g of peach gum powder and dissolve it in 400 mL of water. After it is completely dissolved, put it in a centrifuge at 3000 rpm for 2 minutes, and take the supernatant to obtain 360 mL of peach gum hydrosol.
[0048] Add 0.024g of silver nitrate to 200mL of the above peach gum hydrosol, stir at room temperature 25°C, heat and stir in a magnetic heating stirrer after it dissolves, set the temperature to 100°C, react for 3 hours, cool to room temperature, add water to dilute Obtaining concentration is 84mg / L golden yellow nano-silver sol.
[0049] Add 3.3mL of acetic acid and 0.4g of chitosan to 100mL of distilled water...
Embodiment 3
[0053] Dissolve 100g of peach gum in 1L of distilled water, remove residual bark and other impurities after the peach gum is swollen, then put the remaining peach gum hydrosol in an oven and dry at 60°C for 36h, after drying, crush it with a pulverizer, and use a 250-mesh Sieve through a sieve to obtain peach gum powder with a particle size less than 3 μm. Take 2 g of peach gum powder and dissolve it in 100 mL of water. After it is completely dissolved, put it in a centrifuge at 3000 rpm for 2 minutes, and take the supernatant to obtain 90 mL of peach gum hydrosol.
[0054] Add 0.144g of silver nitrate to the above peach gum hydrosol, stir at room temperature 25°C, heat and stir in a magnetic heating stirrer after it dissolves, set the temperature at 100°C, react for 3 hours, cool to room temperature, and add water to dilute , to obtain a reddish-brown nano-silver sol containing a little reddish-brown precipitate with a concentration of 1120mg / L.
[0055] Add 2.85mL of acetic...
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