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Nano-silver solution and preparation method thereof

A nano-silver, nano-silver oxide technology, applied in the directions of botanical equipment and methods, chemical instruments and methods, silver compounds, etc., can solve the problems of insufficient safety and antibacterial activity, and achieve the effect of high antibacterial performance and simple process

Active Publication Date: 2011-04-06
SHENZHEN LANDO BIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide a preparation method of nano-silver solution, to solve the problems of the existing nano-silver solution as an antibacterial material, such as safety and insufficient antibacterial activity

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  • Nano-silver solution and preparation method thereof

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preparation example Construction

[0039] More specifically, the preparation method of nano-silver solution of the present invention mainly comprises the following steps:

[0040] (1) Put the dispersant in a certain amount of deionized water, stir continuously until it is completely dissolved to prepare a dispersant solution, then add a certain amount of silver nitrate, and stir to dissolve the silver nitrate to obtain a solution (I);

[0041] (2) Take a certain amount of reducing agent solution, add it to solution (I), and stir to mix evenly to obtain solution (II);

[0042] (3) The solution (II) is irradiated under ultraviolet light, stirred rapidly with an electromagnetic stirrer, and reacted for a period of time to prepare the nano-silver solution (III).

[0043] If it is necessary to form nano-silver oxide particles in the solution, the step (4) is further included: passing oxygen into the solution (III) for a certain period of time to prepare a nano-silver oxide solution.

[0044] Wherein in the first st...

example 1

[0050] In this example, the concrete steps of preparing nano-silver solution include:

[0051] (1) Dissolve 3.5 grams of PEG in 96.6 grams of deionized water, stir continuously until completely dissolved to prepare a dispersant solution, then add 60 mg of silver nitrate, stir to dissolve the silver nitrate to obtain a solution (I);

[0052] (2) Take 3.4 ml of 1% ascorbic acid solution, add it to solution (I), and stir and mix evenly to obtain solution (II);

[0053] (3) Put the solution (II) under the ultraviolet lamp and irradiate it quickly with an electromagnetic stirrer, and react for 2 hours to prepare the nano-silver solution (III). The wattage of the ultraviolet lamp used in this step is 5 watts, and the stirring speed is 600 rpm.

[0054] The concentration of the prepared nano-silver solution is 390ppm. Use the nano measure 1.2.5 method for particle size statistics, see figure 2 , the maximum diameter in the field of view is 15.57nm, the minimum is 5nm, and the ave...

example 2

[0057] In this example, the concrete steps of preparing nano-silver solution include:

[0058] (1) Dissolve 3.5 grams of MC in 96.6 grams of deionized water, stir continuously until completely dissolved to prepare a dispersant solution, then add 40 mg of silver nitrate, and stir to dissolve the silver nitrate to obtain a solution (I);

[0059] (2) Take 3.4 ml of 1% citric acid solution, add it to solution (I), and stir to mix evenly to obtain solution (II);

[0060] (3) Put the solution (II) under the ultraviolet lamp and irradiate it quickly with an electromagnetic stirrer, and react for 2 hours to prepare the nano-silver solution (III). The wattage of the ultraviolet lamp used in this step is 5 watts, and the stirring speed is 600 rpm.

[0061] The prepared nano-silver solution has a concentration of 260 ppm and an average particle diameter of about 9.2 nanometers.

[0062] Furthermore, the above nano-silver solution (III) is passed through step (4) into the solution (III)...

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Abstract

The invention relates to nano-silver solution with the nano-silver concentration between 250 and 3,200ppm and the average sliver grain diameter between 2 and 12nm. The nano-silver solution also comprises medicine accessory level dispersing agents and medicine level reducing agents. The preparation method mainly comprises the following steps of: dissolving the medicine accessory level dispersing agents into deionized water to prepare dispersing agent solution; adding and dissolving silver nitrate to obtain solution I; taking and adding the medicine accessory level reducing agent solution into the solution I; mixing the medicine accessory level reducing agent solution with the solution I to obtain solution II; placing the solution II under an ultraviolet lamp to be irradiated; and stirring the solution II for reaction to obtain the nano-silver solution. The nano-silver solution has stronger antibiosis performance. When the nano-silver solution is diluted to 10ppm to detect and evaluate the antibiosis effect on staphylococcus aureus, colibacillus and pseudomonas aeruginosa, the antibiosis efficiency reaches higher than 99.9 percent in two minutes. The preparation method has simple process, can avoid the use of various strong acid, strong base and strong reducing agents and has good medical safety.

Description

technical field [0001] The invention relates to the field of biomedical materials, in particular to a nano-silver solution and a preparation method thereof. Background technique [0002] Nano-silver has strong nano-activity and exhibits extraordinary antibacterial ability. It can kill common bacteria, fungi, mycoplasma, chlamydia and other pathogenic microorganisms at a concentration of a few parts per million (ppm). Compared with antibiotics, nano-silver has the characteristics of bactericidal effect not affected by pH value, broad-spectrum antibacterial, no drug resistance, long-lasting effect, stronger bactericidal power when exposed to water, safety and environmental protection, etc. It is an ideal antibacterial material and can be widely used in Many industries. At present, it has been used in antibacterial fabrics, gels, antibacterial liquids, micropowders and other products, and can be widely used in gynecological infections, superficial fungal infections, wound care...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01P1/00B22F9/24C01G5/00
Inventor 佘振定谭荣伟王明波
Owner SHENZHEN LANDO BIOMATERIALS
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