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Preparation method of nanometer sliver colloid solution

A technology of colloidal solution and nano-silver, which is applied in the field of preparation of nano-silver colloidal solution, can solve the problems of complicated steps and difficult control of particle size, and achieve the effect of high antibacterial efficiency, small particle size of nano-silver, and simple preparation process

Active Publication Date: 2010-09-22
ZHANGJIAGANG NELLNANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the preparation process of nano-silver colloidal solution, there are still problems of complicated steps and difficult control of particle size, and it is still a difficult problem to ensure the stability of nano-silver dispersion system and prevent the agglomeration of nano-silver. The use of dispersants and dispersants inevitably brings problems to the application safety of nano-silver colloidal solutions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Dissolve 0.1g of 2-O-nonyl-β-cyclodextrin in 100ml of deionized water to obtain a 0.1% aqueous solution of 2-O-nonyl-β-cyclodextrin;

[0017] 2. Prepare 1.0mol / L silver nitrate solution, add 5 drops of 0.1mol / L sodium hydroxide solution dropwise, then add dropwise 5% ammonia solution until the precipitate disappears, and obtain silver with a mass molar concentration of 0.1mol / L Ammonia solution;

[0018] 3. Mix 0.1% 2-O-nonyl-β-cyclodextrin aqueous solution and silver ammonia solution with a mass molar concentration of 0.1mol / L at a volume ratio of 1:50, stir at 80°C for 40min, and obtain granules Nano silver colloid solution with a diameter of 5-20nm.

Embodiment 2

[0020] 1. Dissolve 0.1g of 2-O-dodecyl-α-cyclodextrin in 100ml of deionized water to obtain a 0.1% aqueous solution of 2-O-dodecyl-α-cyclodextrin;

[0021] 2. Prepare 1.0mol / L silver nitrate solution, add 5 drops of 0.1mol / L sodium hydroxide solution dropwise, then add dropwise 5% diethylenetriamine aqueous solution until the precipitate disappears, and the molar concentration is 0.1mol / L L of silver ammonia solution;

[0022] 3. Mix 0.1% 2-O-dodecyl-α-cyclodextrin aqueous solution and silver ammonia solution with a mass molar concentration of 0.1mol / L at a volume ratio of 1:50, and stir at 100°C for 10 minutes, A nano-silver colloid solution with a particle diameter of 5-20 nm is obtained.

Embodiment 3

[0024] 1. Dissolve 0.1g of 2,6-di-O-octyl-γ-cyclodextrin in 100ml of deionized water to obtain 0.1% 2,6-di-O-octyl-γ-cyclodextrin aqueous solution;

[0025] 2. Prepare 1.0mol / L silver nitrate solution, add 5 drops of 0.1mol / L sodium hydroxide solution dropwise, and then add dropwise 5% tetraethylenepentamine aqueous solution until the precipitate disappears, and the molar concentration of 0.1mol / L is obtained. L of silver ammonia solution;

[0026] 3. Mix 0.1% 2,6-di-O-octyl-γ-cyclodextrin and silver ammonia solution with a mass molar concentration of 0.1mol / L at a volume ratio of 1:50, and stir at 100°C for 20min , to obtain a nano silver colloid solution with a particle diameter of 5-20 nm.

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Abstract

The invention discloses a safe, environment-friendly and stable preparation method of a nanometer sliver colloid solution, comprising the following steps: mixing the alkylated cyclodextrin aqueous solution and the silver ammonia solution according to the volume ratio of 1:100-1:10, wherein the mass percent of the alkylated cyclodextrin aqueous solution is 0.1-10%, and the mass molar concentration of the silver ammonia solution is 0.01-1.0mol / L; and stirring for 1-120min at 10-100 DEG C to obtain the nanometer sliver colloid solution of which the average grain diameter is 1-100nm. The method of the invention has the advantages of simple preparation process and can ensure the application safety of the nanometer sliver colloid solution, and the prepared nanometer sliver colloid solution has the characteristics of good stability, small grain diameter of nanometer sliver, less dosage and high antibiosis efficiency in the function materials of the nanometer sliver.

Description

technical field [0001] The invention belongs to the field of nanometer materials, in particular to a preparation method of nanometer silver colloidal solution. Background technique [0002] Nano-silver is a simple substance of metallic silver with a particle size of nanometer scale. It is reported that nano-silver has broad application prospects in the fields of antibacterial materials, high-efficiency catalysts, lubricants, light-absorbing materials, coatings, sensors, conductive pastes, high-performance electrode materials, etc., and has become a functional material with special properties. Theoretical research and application important issues for development. For example, adding a small amount of nano-silver to chemical fiber can improve some properties of chemical fiber products and make it have a strong bactericidal ability; doping an appropriate amount of nano-silver in the silicon oxide film can make the glass coated with this film effective. Certain photoluminescen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 张峰姚理荣
Owner ZHANGJIAGANG NELLNANO TECH
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