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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

Inactive Publication Date: 2016-01-27
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 the small particle size and high surface energy of nano-silver, which has a strong tendency to agglomerate, the market is all low-concentration silver dispersion products

Method used

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  • Method for preparing high-concentration nano silver monomer dispersion liquid
  • Method for preparing high-concentration nano silver monomer dispersion liquid
  • Method for preparing high-concentration nano silver monomer dispersion liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 100ml of the high-concentration dispersion liquid of nano-silver monomer to prepare a dispersion liquid with a nano-silver concentration of 5000ppm. The raw materials and proportioning ratio are shown in the following table:

[0023] Raw materials and ratio:

[0024]

[0025] Preparation:

[0026] (1) Add 1.2g of aspartic acid and 2ml of ammonia water additive into purified water, stir to dissolve;

[0027] (2) Add 0.79 grams 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 and dissolve to form a uniform transparent solution, add purified water to 100 ml, and continue stirring for 2 hours to obtain a high-concentration nano-silver single substance dispersion of the target substance.

Embodiment 2

[0030] Take 100ml of the high-concentration dispersion of nano-silver monomer to prepare a dispersion with a nano-silver concentration of 6000ppm. The raw materials and proportioning ratio are shown in the following table:

[0031] Raw materials and ratio:

[0032]

[0033] Preparation:

[0034] (1) Add 0.1 g disodium edetate and 0.3 boric acid into purified water, stir to dissolve;

[0035] (2) Add 0.94 grams of silver nitrate, add water to 80ml, and set aside after dissolution;

[0036] (3) Add 0.2 g of glucitol and 1 g of polyvinyl alcohol-1750, stir to dissolve into a uniform transparent solution, add purified water to 100 ml, and continue stirring for 3 hours to obtain a high-concentration nano-silver single substance dispersion of the target;

[0037] In the nano-silver monomer dispersion prepared by the above method, the concentration of the monomer silver is 6000ppm, suspended in the solution in a monodisperse form; the particle size of the nano-silver is 5-10nm, ...

Embodiment 3

[0039] Take 100ml of the high-concentration dispersion of nano-silver monomer to prepare a dispersion with a nano-silver concentration of 6000ppm. The raw materials and proportioning ratio are shown in the following table:

[0040]

[0041] Preparation:

[0042] (1) Add 1.8 grams of water-soluble cyclodextrin and 2.5ml of lactic acid into purified water, stir to dissolve;

[0043] (2) Add 0.93 grams of silver citrate, add water to 80ml, and set aside after dissolution;

[0044] (3) Add 1.2 grams of xylitol and 0.6 grams of polyvinylpyrrolidone k-15, stir to dissolve into a uniform transparent solution, add purified water to 100ml, and continue stirring for 3 hours to obtain a high-concentration nano-silver single substance dispersion of the target product.

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Abstract

The invention discloses a method for preparing high-concentration nano silver monomer dispersion liquid. A nano silver stabilizer, a silver source and a silver ion complexing agent are dissolved in water in sequence, and a reducing agent is added after stirring is carried out for a certain period of time; and stirring continues, the mixture stands and ages, and the target high-concentration nano silver monomer dispersion liquid is obtained. According to the method, the high-concentration nano silver monomer dispersion liquid is obtained at low temperature through the very moderate polyol weak reducing agent rather than a strong reduction reaction. The size of nano silver particles prepared through the scheme ranges from 5 nanometers to 10 nanometers, the nano silver particles have monodispersity, and the agglomeration phenomenon is avoided. The antibacterial liquid has the characteristics of being high in stability, high in antibacterial rate, wide in antibacterial range and the like. The preparation method is easy and convenient to operate, the parameter adjustment range is wide, energy consumption is low, the period is short and the method is suitable for scale-up and industrial big production.

Description

technical field [0001] The invention relates to a preparation method of high-concentration nano-silver monomer dispersion liquid, which belongs to the field of nanotechnology and fine chemical industry. Background technique [0002] The emergence of nanotechnology has brought about a qualitative leap in the bactericidal properties of silver in the nanometer state. Nano-silver can produce a strong bactericidal effect with a small amount of use, strong permeability, broad-spectrum bactericidal effect, and no drug resistance; and nano-silver can promote wound healing, cell growth and repair of damaged cells, And without any toxic reaction, without any irritation to the skin. Therefore, nano-silver antibacterial materials can be used in functional plastics, functional coatings, textile fibers, air purification, food, daily chemicals, medical care and other fields, and have very broad market prospects. In recent years, they have gradually become a research hotspot. [0003] The...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
Inventor 何丹农林琳葛美英章龙王艳丽张春明金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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