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Preparation method of nano composite antibacterial material and prepared antibacterial material thereof

An antibacterial material, nano-composite technology, applied in the fields of botanical equipment and methods, chemicals for biological control, silver halide, etc., can solve the problem that SBA-15 cannot play a protective role, can not slow down the effect to the extreme, increase The preparation process is cumbersome and other problems, and the effects of overcoming easy-to-visible light reduction, lasting and stable antibacterial effect, and simple and easy preparation method are achieved.

Active Publication Date: 2014-11-05
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results show that AgCl has good antibacterial properties, however Ag + It is easy to be reduced to simple Ag and change color when exposed to light, which not only affects the external quality of the product, but also weakens the antibacterial effect
[0005] Another researcher disclosed in the literature (Microporous Mesoporous Mater., 2010, 128:19) the preparation method of the antibacterial agent—a nanocomposite of AgCl and SBA-15 (denoted as AgClSBA-15). The antibacterial agent combines AgCl Loaded into the SBA-15 channel, it has high antibacterial performance and antibacterial stability; in contrast, after AgCl and SBA-15 are simply mixed physically, light will make Ag + Reverted to simple Ag to change color, but SBA-15 cannot play a protective role
However, before implementing the preparation method in this document, SBA-15 needs to be pre-synthesized, which will undoubtedly increase the complexity of the preparation process; at the same time, this preparation method only loads AgCl into the SBA-15 channel, which can only slightly slow down Ag + The reduction speed cannot maximize the slowing effect, that is to say, there should still be a solution that can slow down Ag + Antibacterial agent preparation method of reduction rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of AgCl antibacterial agent: Add 1mL0.25mol / L silver nitrate and 1mL0.5mol / L sodium chloride dropwise to 97mL9.2×10 -4 mol / L cetyltrimethylammonium chloride (CTAC) aqueous solution, stirred at 40°C in the dark for 3.5 hours, centrifuged, washed the solid with ethanol for 5 times, and dried at room temperature in the dark to obtain the AgCl antibacterial agent.

[0026] AgClSiO 2 Preparation of antibacterial agent: Add 1mL0.25mol / L silver nitrate and 1mL0.5mol / L sodium chloride dropwise to 97mL9.2×10 -4 mol / L cetyltrimethylammonium chloride (CTAC) aqueous solution, stirred at 40°C in the dark for 3.5h, then added 0.0286g cetyltrimethylammonium chloride (CTAC), 1mL0. 01mol / L HCl to adjust the pH value to 6, and finally add 0.5mL tetraethyl orthosilicate (TEOS) at a rate of 0.1mL every half hour, stir for 3 hours in the dark, centrifuge and wash with ethanol Solid 5 times, dry at room temperature in the dark, and obtain the finished nanocomposite antibacteria...

Embodiment 2

[0031] Preparation of AgCl antibacterial agent: Add 1mL0.5mol / L silver nitrate and 1mL0.5mol / L sodium chloride dropwise to 97mL9.2×10 -4 mol / L cetyltrimethylammonium chloride (CTAC) aqueous solution, stirred at 40°C in the dark for 3.5 hours, centrifuged, washed the solid with ethanol for 5 times, and dried at room temperature in the dark to obtain the AgCl antibacterial agent.

[0032] AgClSiO 2 Preparation of antibacterial agent: Add 1mL0.5mol / L silver nitrate and 1mL0.5mol / L sodium chloride dropwise to 97mL9.2×10 -4 mol / L cetyltrimethylammonium chloride (CTAC) aqueous solution, stirred at 40°C in the dark for 3.5h, then added 0.0286g cetyltrimethylammonium chloride (CTAC), 1mL0. 01mol / L HCl to adjust the pH value to 6, and finally add 0.5mL tetraethyl orthosilicate (TEOS) at a rate of 0.1mL every half hour, stir for 3 hours in the dark, centrifuge and wash with ethanol Solid 5 times, dry at room temperature in the dark, and then get the antibacterial agent AgClSiO 2 samp...

Embodiment 3

[0037]Preparation of AgCl antibacterial agent: Add 1mL1mol / L silver nitrate and 1mL0.5mol / L sodium chloride dropwise to 97mL9.2×10 -4 mol / L cetyltrimethylammonium chloride (CTAC) aqueous solution, stirred at 40°C in the dark for 3.5 hours, centrifuged, washed the solid with ethanol for 5 times, and dried at room temperature in the dark to obtain the AgCl antibacterial agent.

[0038] AgClSiO 2 Preparation of antibacterial agent: Add 1mL1mol / L silver nitrate and 1mL0.5mol / L sodium chloride dropwise to 97mL9.2×10 -4 mol / L cetyltrimethylammonium chloride (CTAC) aqueous solution, stirred at 40°C in the dark for 3.5h, then added 0.0286g cetyltrimethylammonium chloride (CTAC), 1mL0. 01mol / L HCl to adjust the pH value to 6, and finally add 0.5mL tetraethyl orthosilicate (TEOS) at a rate of 0.1mL every half hour, stir for 3 hours in the dark, centrifuge and wash with ethanol Solid 5 times, dry at room temperature in the dark, and then get the antibacterial agent AgClSiO 2 sample. ...

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Abstract

The invention relates to a preparation method of a nano composite antibacterial material and a prepared antibacterial material thereof. The method comprises the steps of 1. adding silver nitrate and sodium chloride into surfactant water solution, agitating and reacting in a shielding manner to obtain dispersion liquid; 2. adding the surfactant used in the first step into the dispersion liquid obtained from the first step, adding hydrochloric acid to adjust pH to be 4-6; and adding tetraethyl orthosilicate, agitating and reacting in the shielding manner to obtain reaction solution; and 3. centrifuging the reaction solution obtained from the second step, washing the obtained solid by alcohol and drying in the shielding manner, so as to obtain the nano composite antibacterial material product. The preparation method disclosed by the invention is simple and feasible, and free of an auxiliary agent and an oil phase, and has the characteristics of being convenient to prepare, mild in reaction condition, free of high temperature and the like. The antibacterial action of the prepared antibacterial material is lasting and stable.

Description

technical field [0001] The invention relates to a method for preparing a nanocomposite antibacterial material and an antibacterial material prepared by the method. Background technique [0002] In daily life, people are exposed to many pathogenic microorganisms all the time, such as Escherichia coli, Staphylococcus aureus, bifidobacteria and various viruses, and their spread and spread seriously threaten human health. In recent years, people have paid more and more attention to microorganisms that endanger human existence, and have researched and developed various materials with antibacterial and bactericidal properties, which are of great significance to protecting human beings from diseases and creating a green and healthy environment. Antibacterial materials will also form a huge and broad market. [0003] The current antibacterial materials are mainly divided into three categories: natural, organic and inorganic. Natural antibacterial agents come from natural animal an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/16A01P1/00C01G5/02
Inventor 刘晓勤孙林兵李艳华刘定华
Owner NANJING TECH UNIV