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Ag, Cu and Zn doped nanometer titanium dioxide composite antibacterial agent and preparation method thereof

A nano-titanium dioxide, silver-copper-zinc technology, applied in the preparation of zinc composite antibacterial agent, nano-titanium dioxide doped with silver, copper field, can solve the problems of silver instability, limitation, low silver loading on titanium dioxide, etc.

Inactive Publication Date: 2014-09-17
上海施迈尔精密陶瓷有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silver is not very stable and easily changes color, and the amount of silver loaded on titanium dioxide is generally low, which limits the application of this type of antibacterial agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Weigh 0.6 mol of n-butyl titanate, and add it to 6 mol of ethanol solution under stirring condition; weigh 0.6 mol of acetic acid as hydrolysis inhibitor, add it to the reaction system, and adjust the pH value of the system to about 3.0; Slowly add 2.1mol deionized water into the reaction system dropwise to form a clear and transparent light yellow sol;

[0018] (2) According to the TiO in the reaction system 2 The content is based on the content of 2wt% silver, 1wt% copper, 1wt% zinc, SiO 2 2wt%, the metal ion complex solution and the amount of ethyl orthosilicate were weighed respectively, mixed and added dropwise into the reaction system to form a mixed sol doped with metal ions. At this time, the system should be protected from light;

[0019] (3) After aging the gel for 8 hours, vacuum-dry it for 16 hours, pulverize it to a particle size of ≤0.5 micron, and treat it at 450°C for 1 hour to obtain a light blue composite antibacterial agent.

[0020] (4)) Antib...

Embodiment 2

[0022] (1) Weigh 0.5mol of n-butyl titanate and add it to 8mol of n-butanol solution under stirring; weigh 0.5mol of acetylacetone as a hydrolysis inhibitor and add it to the reaction system, while using nitric acid to adjust the pH of the system The value is about 4.0; 1.75mol deionized water is slowly added dropwise to the reaction system to form a light yellow sol;

[0023] (2) According to the TiO in the reaction system 2 The content of citric acid is a benchmark, with silver content 1.5wt%, zinc content 0.8wt%, adopts citric acid to be the complexing agent configuration metal ion complexing solution. At the same time, according to the TiO in the reaction system 2 Based on the content of SiO 2 Weigh the amount of tetraethyl orthosilicate to be 3wt%, mix it with the metal ion complexing solution, and add it dropwise to the sol obtained in (1), at this time, the system should be protected from light;

[0024] (3) After aging the gel for 12 hours, vacuum-dry it at 80°C for...

Embodiment 3

[0026] (1) Weigh 0.5 mol of n-butyl titanate, and add it to 10 mol of isopropanol solution under stirring; weigh 0.5 mol of acetic acid as a hydrolysis inhibitor, add it to the reaction system, and use nitric acid to adjust the pH value of the system is about 3.0; slowly drop 1.25mol deionized water into the reaction system to form milky yellow sol;

[0027] (2) According to the TiO in the reaction system 2 The content of citric acid is a benchmark, with silver content 1.6wt%, copper content 0.8wt%, adopts citric acid to be the complexing agent configuration metal ion complexing solution. At the same time, according to the TiO in the reaction system 2 Based on the content of SiO 2 Weigh the amount of tetraethyl orthosilicate to be 2.5wt%, mix it with the metal ion complexing solution, and add it dropwise to the sol obtained in (1), at this time, the system should be protected from light;

[0028] (3) After aging the gel for 10 hours, vacuum-dry it at 80°C for 13 hours, pulv...

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Abstract

The invention discloses a Ag, Cu and Zn doped nanometer titanium dioxide composite antibacterial agent and a preparation method thereof. The method uses n-butyl titanate as a titanium source material, and employs a sol-gel method to conduct hydrolysis polycondensation reaction on n-butyl titanate under certain reaction conditions, so as to form alcogel with particular space network structure. In the sol / gel reaction process, a proper amount of silver ion, copper ion and zinc ion are added while adding tetraethyl orthosilicate, thereby forming a mixed gel, which is subjected to drying and sintering to obtain the silver, copper and zinc doped nanometer titanium dioxide composite antibacterial powder. The composite antimicrobial agent prepared by the method provided by the invention has no adverse effect on the melt crystallization temperature, crystallinity and processing properties of polymer; the composite antibacterial agent can used in antibacterial polyethylene plastic products, and has antibacterial rate to Escherichia coli and Staphylococcus aureus higher than 99.99%, and bacteriostasis on all kinds of molds of grade 0. The composite antibacterial agent does not change color under natural light conditions.

Description

technical field [0001] The invention relates to a preparation method of a composite antibacterial agent doped with silver, copper and zinc by nanometer titanium dioxide, which belongs to the technical field of inorganic nanomaterials. Background technique [0002] Anatase Nano Titanium Dioxide (TiO 2 ) agent is an inorganic semiconductor photocatalytic antibacterial agent, which has the advantages of safety, continuous and broad-spectrum antibacterial. Due to the limitation of the photocatalytic sterilization mechanism, the antibacterial effect of this type of antibacterial agent is greatly affected in the environment of no light or low light. [0003] The method of silver (Ag) supported on titanium dioxide, due to the role of silver ions, broadens the TiO 2 photoresponse range, improving the TiO 2 The photoactivity of silver ions, together with the strong bactericidal effect of silver ions themselves, lead to the high antibacterial efficiency of nano-titanium dioxide sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/22C08K3/28C08K3/36C08L23/06C01G23/053A01N59/20A01P1/00
Inventor 李戈李广仁史春阳
Owner 上海施迈尔精密陶瓷有限公司
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