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Nano-class silver colloidal solution and preparation method thereof

A colloidal solution and nano-silver technology, applied in the field of nano-materials, can solve the problems of reducing the sterilization efficiency of nano-silver, and achieve the effects of strong ability to kill microorganisms, less equipment and simple process

Inactive Publication Date: 2008-10-15
庄平 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Chinese patent CN1729787A discloses a liquid nanometer elemental silver antibacterial agent and its preparation method, using a complexing agent that is a combination of one or more of betaine polymers, polycarboxylic acids and their salts, polymaleic acid and their salts , some complexing agents may reduce the sterilization efficiency of nano-silver due to the influence of electron cloud

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Prepare the mixed reducing agent I aqueous solution: take 60g of vitamin C, add deionized water to 400ml, stir well until completely dissolved, and set aside.

[0029] 2. Prepare the aqueous solution of mixed reducing agent II: take 200ml of ethanol. stand-by.

[0030] 3. Prepare the stabilizer aqueous solution: take 150g of N-methylpyrrolidone, add deionized water to 300ml, stir well until completely dissolved, and set aside.

[0031] 4. Preparation of silver salt solution: take 20g of silver nitrate, add deionized water to 100ml, fully stir until completely dissolved, keep away from light, and set aside.

[0032] Operation process steps: (1) Put the stabilizer aqueous solution, the silver salt aqueous solution and the mixed reducing agent I into the reaction kettle, and fully stir them evenly. (2) Add the mixed reducing agent II dropwise into the reaction kettle of step (1) under constant stirring, and after the dropwise addition, continue stirring for 1-1500 min...

Embodiment 2

[0034] 1. Prepare mixed reducing agent I aqueous solution: take 5g of potassium borohydride, 30g of vitamin C, add deionized water to 400ml of water, stir well until all are dissolved, and set aside.

[0035] 2. Prepare mixed reducing agent II aqueous solution: take 100ml of propylene glycol and 100ml of ethanol, and set aside.

[0036] 3. Prepare the stabilizer aqueous solution: take 5g of polyvinylpyrrolidone, add deionized water to 300ml, stir well until completely dissolved, and set aside.

[0037] 4. Preparation of silver salt solution: take 10g of silver nitrate, add deionized water to 100ml, fully stir until completely dissolved, keep away from light, and set aside.

[0038] Operation process steps: (1) Put the stabilizer aqueous solution, the silver salt aqueous solution and the mixed reducing agent I into the reaction kettle, and fully stir them evenly. (2) Put the mixed reducing agent II into the reaction kettle and stir thoroughly. (3) Under constant stirring, add...

Embodiment 3

[0040] 1. Prepare an aqueous solution of mixed reducing agent I: take 5 g of potassium borohydride, 20 g of glucose, add deionized water to 400 ml, fully stir until completely dissolved, and set aside.

[0041] 2. Prepare mixed reducing agent II aqueous solution: take 200ml of ethanol and set aside.

[0042] 3. Prepare the stabilizer aqueous solution: take 5g of polyvinylpyrrolidone, add deionized water to 300ml, stir well until completely dissolved, and set aside.

[0043] 4. Preparation of silver salt solution: take 10g of silver nitrate, add deionized water to 100ml, fully stir until completely dissolved, keep away from light, and set aside.

[0044] Operation process steps: (1) Take the stabilizer aqueous solution and the silver salt aqueous solution into the reaction kettle, and fully stir them evenly. (2) Put the aqueous solution of mixed reducing agent I and II into the reaction kettle, and stir well and evenly. (3) Under constant stirring, add step (1) uniformly mixed ...

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PUM

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Abstract

The invention relates to a nanometer silver glue solution and the method for preparing the same, comprising stabilizer, mixing reducer I, mixing reducer II, and argentic salt and pure water. The method comprises following steps: putting stabilizer solution, argentic salt solution and mixing reducer I solution into autoclave, stirring thoroughly; putting mixing reducer II into autoclave; dropping even mixing solution into another even mixing solution autoclave under continuous stirring, stirring and getting nanometer silver glue solution. The product should be stored sealed and at low temperature. The invention is characterized in that: it employs two kinds of reducer to prepare nanometer silver glue solution, and a systematic nanometer silver glue solution of low-and-high concentration, the process is simple, and the product can be used as medicine, food, cosmetics, disinfecting agent and so on.

Description

technical field [0001] The invention relates to a nano-silver colloid solution and a preparation method thereof. It belongs to the field of nanomaterial technology. Background technique [0002] Nanotechnology is the most promising emerging technology in the 21st century. It is widely used in the fields of information, biology, medicine, chemical industry, aerospace, energy and national defense, and has huge market potential. Nano-silver material has very stable physical and chemical properties, and has excellent performance in many aspects such as electricity, optics and catalysis. It has been widely used in many fields such as ceramic materials, environmental protection materials and coatings. When nano-silver particles are embedded in different When the substrate is used, the material exhibits completely different electrical and optical properties from the original ones. At present, the research on nano-silver particles is still a hot spot, and the application prospects ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 庄平严国兴涂序金
Owner 庄平
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