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Nanometer silver colloid solution and preparation method thereof

A technology of colloidal solution and nano-silver, which is applied in the field of nanotechnology and fine chemical industry, can solve the problems of small nano-silver particle size and high surface energy, and achieve the effects of short cycle, strong stability and easy operation

Inactive Publication Date: 2014-02-12
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its small particle size and high surface energy, nano-silver has a strong tendency to agglomerate.

Method used

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  • Nanometer silver colloid solution and preparation method thereof
  • Nanometer silver colloid solution and preparation method thereof
  • Nanometer silver colloid solution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Raw materials and ratio:

[0026]

[0027] Preparation:

[0028] (1) According to the mass percentage, ammonia water was prepared into a solution with a concentration of 2%, ammonium dodecylbenzenesulfonate was prepared into a 10% solution, and polyvinyl alcohol 1750 was prepared into a 5% solution for later use.

[0029] (2) Add disodium edetate, glycerin, ammonium dodecylbenzenesulfonate solution and polyvinyl alcohol 1750 solution into the reactor, add purified water to 95 ml, and stir to dissolve. Then add ammonia solution to adjust the pH to about 9; then add silver citrate, stir to dissolve into a uniform transparent solution, then add purified water to 100 ml. .

[0030] (3) Raise the water temperature, and leave it to stand at 40 degrees Celsius for 8 hours to obtain the target nano-silver colloidal solution.

Embodiment 2

[0032] Raw materials and ratio:

[0033]

[0034] Preparation:

[0035] (1) According to mass percentage, prepare ammonium lauryl ether sulfate into a 10% solution, and sodium carboxymethylcellulose into a 5% solution for later use.

[0036] (2) Add disodium edetate, glucitol, ammonium lauryl ether sulfate solution and sodium carboxymethylcellulose solution into the reactor, add purified water to 95 ml, and stir to dissolve. Then add lactic acid to adjust the pH to about 4; then add silver acetate, stir to dissolve into a uniform transparent solution, then add purified water to 100 ml. .

[0037] (3) Airtightly stand and age at 60 degrees Celsius for 16 hours to obtain the target nano-silver colloid solution.

Embodiment 3

[0039] Raw materials and ratio:

[0040]

[0041] Preparation:

[0042] (1) According to mass percentage, boric acid was prepared into a 10% solution, ammonium dodecylsulfonate was prepared into a 10% solution, and Carbomer 2020 was prepared into a 1% solution for later use.

[0043] (2) Add sodium hexametaphosphate, mannitol, ammonium dodecylsulfonate solution and carbomer 2020 solution into the reactor, add purified water to 95 ml, and stir to dissolve. Then add boric acid solution to adjust the pH to about 6.5; then add silver nitrate, stir to dissolve into a uniform transparent solution, then add purified water to 100 ml.

[0044] (3) Airtightly stand and age at 50 degrees Celsius for 24 hours to obtain the target nano-silver colloid solution.

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Abstract

The invention discloses a nanometer silver colloid solution and a preparation method thereof. The nanometer silver colloid solution is characterized in that the 100 ml of nanometer silver colloid solution comprises the following raw materials of 0.1 to 10 g of complexing agents, 0.1 to 2 g of reducing agents, 0 to 5 g of dispersing agents, 0 to 8 g of protective agents, PH (Potential Of Hydrogen) conditioning agents for performing conditioning on the PH value within the range of 4 to 10, 0.002 to 0.4 g of silver salts and the allowance purified water. The complexing agents, the reducing agents, the dispersing agents, the protective agents, the PH conditioning agents and the silver salts are dissolved in water according to the sequential order, the aging reaction is performed under a certain condition, and the nanometer silver colloid solution is obtained eventually. According to the preparation method, the severe reduction reaction is not required, the mild polyol weak reducing agents are utilized, the reaction rate is controlled by the complexing agents, and the nanometer silver colloid solution is obtained at the low temperature. According to the nanometer silver colloid solution which is prepared from the preparation method, the controllable range of the PH value is 4 to 10 and the nanometer silver colloid solution is colorless, transparent, discoloration-resistant, strong in stability and the like. The preparation method has the advantages of being simple in operation, wide in parameter adjustable range, low in energy consumption, short in cycle, suitable for mass production and the like.

Description

technical field [0001] The invention relates to a colloid solution and a preparation method thereof, in particular to a nano-silver colloid solution and a preparation method thereof, and belongs to the field of nanotechnology and fine chemical industry. Background technique [0002] In recent years, the development of nanotechnology has provided new opportunities for the interdisciplinary development of physics, chemistry, materials science, biology and other disciplines, and has driven the rapid development of many emerging disciplines related to nanotechnology. [0003] In the field of nanomaterial research, nanosilver is one of the metal nanomaterials that have been studied more in recent years. Due to its small size effect, quantum size effect, surface effect and macroscopic quantum tunneling effect, nano silver exhibits many unique properties. When the particle size of silver reaches the nanometer level, its antibacterial performance will increase to thousands of times...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24B82Y40/00B82Y30/00
Inventor 赵斌何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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