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Nano silver and preparation method and application of nano silver

A nano-silver, reaction technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of inability to accurately control the reaction temperature, limit the wide application of nano-silver, uneven particle size of nano-silver, etc. Problems, to achieve good application prospects, shorten the reaction time, the effect of uniform particle size

Inactive Publication Date: 2020-08-07
广州大学附属中学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the existing microwave synthesis method, the microwave equipment used usually reacts at a constant power, the temperature fluctuates greatly during the reaction process, and the reaction temperature cannot be accurately controlled. Limiting the wide application of nano-silver

Method used

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  • Nano silver and preparation method and application of nano silver
  • Nano silver and preparation method and application of nano silver
  • Nano silver and preparation method and application of nano silver

Examples

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preparation example Construction

[0037] The invention provides a preparation method of nano silver, comprising the following steps:

[0038] The silver nitrate solution and the sodium citrate solution are mixed, and the reduction reaction is carried out in a microwave synthesizer to obtain nano silver;

[0039] The temperature of the reduction reaction is 60-120°C.

[0040] In the present invention, unless otherwise specified, the required preparation raw materials are all commercially available products well known to those skilled in the art.

[0041] The present invention mixes silver nitrate solution and sodium citrate solution. In the present invention, the mass concentration of the silver nitrate solution is preferably 0.0001-0.001 mol / L, more preferably 0.0005-0.001 mol / L. In the present invention, the silver nitrate solution is preferably an aqueous silver nitrate solution, and the process of preparing the silver nitrate aqueous solution is not particularly limited in the present invention, and the s...

Embodiment 1

[0051] Dissolve 0.0849g of silver nitrate in 500mL of deionized water to obtain a silver nitrate solution with a concentration of 0.001M;

[0052] Dissolve 1 g of sodium citrate in 100 mL of deionized water to obtain a sodium citrate solution with a mass concentration of 1%;

[0053] 10 mL of the sodium citrate solution was added with 0.01 M HNO 3 The solution was adjusted to pH 6;

[0054] 50 mL of the above-mentioned silver nitrate solution was heated to boiling, and 5 mL of sodium citrate solution with pH value of 6 was added dropwise, and stirred evenly while adding dropwise. After the dropwise addition, the heat source was removed and cooled; A reduction reaction was carried out (120° C., 10 min); after the reaction, the obtained material was centrifuged, and the supernatant was taken to obtain a nano-silver solution.

[0055] Performance Testing

[0056] 1) Carry out SEM characterization and particle size distribution test to the nano-silver prepared in Example 1, the...

Embodiment 2

[0059] Dissolve 0.0849g of silver nitrate in 500mL of deionized water to obtain a silver nitrate solution with a concentration of 0.001M;

[0060] Dissolve 1 g of sodium citrate in 100 mL of deionized water to obtain a sodium citrate solution with a mass concentration of 1%, take 10 mL of sodium citrate solution, and use pH test paper to measure the pH value of 7;

[0061] 50 mL of the above-mentioned silver nitrate solution was heated to boiling, and 5 mL of sodium citrate solution with a pH value of 7 was added dropwise, and stirred evenly while adding dropwise. After the dropwise addition, the heat source was removed and cooled; A reduction reaction was carried out (120° C., 10 min); after the reaction, the obtained material was centrifuged, and the supernatant was taken to obtain a nano-silver solution.

[0062] Performance Testing

[0063] 3) SEM characterization and particle size distribution test are carried out to the nano-silver prepared in Example 2, and the results...

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Abstract

The invention provides nano silver and a preparation method and application of the nano silver, and belongs to the technical field of nano materials. The preparation method of the nano silver includesthe following steps that silver nitrate solutions and sodium citrate solutions are mixed and subjected to a reduction reaction in a microwave synthesizer to obtain the nano silver, and the temperature of the reduction reaction is 60-120 DEG C. The nano silver is synthesized by the microwave radiation technology, the required reaction temperature can be quickly reached within 5-60s, precise temperature control and uniform heating are realized in the whole reaction process, and the whole process is in an airtight state and is conductive to ensuring the particle size evenness of the nano silver.In addition, by accurately controlling the reaction temperature at 60-120 DEG C, the prepared nano silver has uniform particle size distribution, which is beneficial to giving full play of the anti-inflammatory action of the nano silver.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a nanometer silver and a preparation method and application thereof. Background technique [0002] Nano-silver has antibacterial properties and promotes tissue repair. Because nano-silver has nano-scale effect and quantum-scale effect, it has a larger specific surface area, which increases the contact area with the surface of bacteria, which can kill the bacteria in contact and improve the sterilization effect. Nano-silver can also promote wound healing. When a wound occurs, inflammatory cells will accumulate in the wound to aggravate the inflammation. Nano-silver can inhibit the aggregation of inflammatory cells in the wound, and promote the production of tissue cells to accelerate wound healing. Currently on the market, nano-silver is widely used to exert its antibacterial effect, and is widely used in antibacterial dressings and patches. [0003] In recent years, the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00A61K33/38A61P17/02A61P29/00A61P31/04B82Y30/00B82Y40/00
CPCB22F9/24A61K33/38A61P31/04A61P17/02A61P29/00B82Y30/00B82Y40/00B22F1/054
Inventor 梅鸣鹤黄立为姚海霞黄绮敏李俊杰温慧婷
Owner 广州大学附属中学
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