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Preparation method of even and stable nano-silver water solution

An aqueous solution and nano-silver technology, applied in the field of nano-materials, can solve the problems of insufficient dispersion and stability of nano-silver, and achieve the effect of simple preparation method, wide range of raw materials, and mild reaction

Inactive Publication Date: 2013-02-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conclusions all show that the dispersion and stability of nano-silver obtained by plant reduction are insufficient.

Method used

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  • Preparation method of even and stable nano-silver water solution
  • Preparation method of even and stable nano-silver water solution
  • Preparation method of even and stable nano-silver water solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put 52ml of divinyltriamine in a 250ml three-neck flask, N 2 protection, under stirring in an ice bath, a mixed solution of 43ml of methyl acrylate and 100ml of methanol was slowly added dropwise, and after the dropwise addition was completed, it was reacted at room temperature for 4 hours to obtain a light yellow transparent liquid. After methanol was removed by rotary evaporation under reduced pressure, the temperature was raised to 150° C. to continue the reaction under reduced pressure for 4 h to obtain a viscous pale yellow amino-terminated hyperbranched compound.

[0026] Wash the aloe leaves with deionized water and peel them to obtain aloe vera, then cut into pieces, pulverize, filter, separate and purify to obtain the aloe leaf extract, disperse in deionized water, and prepare 100ml of aloe vera with a volume percentage of 10% The aqueous solution of the leaf extract was mixed with 1ml of the aqueous solution of the amino-terminated hyperbranched compound with ...

Embodiment 2

[0028] Put 95ml tetraethylene pentamine in a 250ml three-neck flask, N 2 protection, under stirring in an ice bath, a mixed solution of 53ml of methyl acrylate and 80ml of methanol was slowly added dropwise, and after the dropwise addition was completed, it was reacted at room temperature for 4 hours to obtain a light yellow transparent liquid. After methanol was removed by rotary evaporation under reduced pressure, the temperature was raised to 150° C. to continue the reaction under reduced pressure for 4 h to obtain a viscous pale yellow amino-terminated hyperbranched compound.

[0029] The cactus is washed with deionized water, peeled to obtain inner denim, then cut into pieces, crushed, filtered, separated and purified to obtain cactus extract, dispersed in deionized water, and 50ml of cactus extract aqueous solution with a volume percentage of 50% is prepared , mix it with 2.5ml of an aqueous solution of an amino-terminated hyperbranched compound with a mass volume concen...

Embodiment 3

[0034] Place 60ml polyamino compound divinyltriamine in a 250ml three-necked flask, N 2 protection, under stirring in an ice bath, slowly add 12.5 g of a DMF solution of succinic anhydride dropwise, and react at room temperature for 4 hours after the dropwise addition to obtain a milky white solution. After removing DMF by rotary evaporation under reduced pressure, the temperature was raised to 150° C. to continue the reaction under reduced pressure for 4 h to obtain a viscous pale yellow amino-terminated hyperbranched compound.

[0035] Prepare aloe vera leaf extract and cactus extract according to embodiment 1 and 2 technical scheme.

[0036] After 50ml volume percentage is 40% aloe leaf extract solution aqueous solution and 70ml volume percentage is 20% cactus leaf extract solution aqueous solution mixing, add 2ml mass volume concentration and be 1% amino terminal hyperbranched compound aqueous solution, obtain composite solution after mixing, Freeze at -20°C for 6 hours, ...

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Abstract

The invention discloses a preparation method of even and stable nano-silver water solution, which comprises the steps of: crushing, filtering, separating, purifying and diluting plant leaves to obtain plant leaf extract water solution; mixing the obtained plant leaf extract water solution with amino-terminated hyperbranched polymer aqueous solution to obtain plant leaf extract composite solution; repeatedly freezing and unfreezing to obtain plant leaf extract dispersion liquid; and after that, adding silver-ammonia solution into the obtained plant leaf extract dispersion liquid, and mixing to obtain the even and stable nano-silver water solution with the particle size of 1-100nm. The plant leaf extract is adopted as catching agent and reducing agent of silver ions, so that the method is wide in material sources, mild in reaction, safe and environment-friendly; and the prepared nano-silver water solution is good in stability and small in nano-silver particle size, and has the characteristic of high antibacterial efficiency, thus being widely applied to the fields such as electronics, textile, catalysis, medical material, medical health, etc.

Description

technical field [0001] The invention relates to a method for preparing an aqueous solution of nano-silver. The aqueous solution of nano-silver prepared by the method has good stability, large output of nano-silver, small particle size, and uniform distribution. When applied to nano-silver functional materials, it has the advantages of small dosage, convenient use, The invention has the advantages of high antibacterial efficiency and belongs to the field of nanometer materials. Background technique [0002] Nanomaterials are a new type of material composed of nanoparticles with a size ranging from 1 to 100 nm. They have specific surface effects, small size effects, quantum size effects, and macroscopic quantum tunneling effects, and present many strange physical and chemical properties different from conventional materials. Nano-silver is a simple substance of metallic silver with a particle size of nanometers. Nano-silver materials have the basic characteristics of nano-mate...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 林红陈宇岳熊佳庆
Owner SUZHOU UNIV
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