Method for preparing high-concentration nano silver monomer dispersion liquid
A technology of nano-silver and dispersion liquid, which is applied in the field of nano-technology and fine chemical industry, can solve the problems of small nano-silver particle size and high surface energy, and achieve the effects of wide pH controllable range, high sterilization rate and wide sterilization range
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[0021] Example 1:
[0022] Based on 100ml of this nano-silver monomer high-concentration dispersion, prepare a dispersion with a nano-silver concentration of 5000 ppm. The raw materials and the ratio are shown in the following table:
[0023] Raw materials and ratio:
[0024]
[0025] Preparation:
[0026] (1) Add 1.2 g of aspartic acid and 2 ml of ammonia adjuvant to purified water and stir to dissolve;
[0027] (2) Add 0.79 g of silver citrate, add water to 80ml, and set aside after dissolution;
[0028] (3) Add 0.8 g of mannitol and 0.3 g of polyethylene glycol 2000, stir to dissolve into a uniform transparent solution, and add purified water to 100 ml, and continue to stir for 2 hours to obtain the target high-concentration nano-silver elemental dispersion.
Example Embodiment
[0029] Example 2:
[0030] Based on 100ml of this nano-silver monomer high-concentration dispersion, prepare a dispersion with a nano-silver concentration of 6000 ppm. The raw materials and the ratio are shown in the following table:
[0031] Raw materials and ratio:
[0032]
[0033] Preparation:
[0034] (1) Add 0.1 g of disodium edetate and 0.3 boric acid to purified water and stir to dissolve;
[0035] (2) Add 0.94 g of silver nitrate, add water to 80ml, and set aside after dissolution;
[0036] (3) Add 0.2 g of glucose alcohol and 1 g of polyvinyl alcohol-1750, stir to dissolve into a uniform transparent solution, and add purified water to 100ml, continue to stir for 3h, to obtain the target high-concentration nano-silver elemental dispersion;
[0037] The nano-silver monomer dispersion prepared by the above method has a monomer silver concentration of 6000 ppm and is suspended in the solution in a monodisperse form; the particle size of the nano-silver is 5-10nm, the nano-silver ox...
Example Embodiment
[0038] Example 3:
[0039] Based on 100ml of this nano-silver monomer high-concentration dispersion, prepare a dispersion with a nano-silver concentration of 6000 ppm. The raw materials and the ratio are shown in the following table:
[0040]
[0041] Preparation:
[0042] (1) Add 1.8 g of water-soluble cyclodextrin and 2.5 ml of lactic acid to purified water and stir to dissolve;
[0043] (2) Add 0.93 g of silver citrate, add water to 80ml, and set aside after dissolution;
[0044] (3) Add 1.2 g of xylitol and 0.6 g of polyvinylpyrrolidone k-15, stir to dissolve into a uniform transparent solution, and add purified water to 100ml, and continue to stir for 3 hours to obtain the target high-concentration nano-silver elemental dispersion.
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