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Preparation method of silver-loaded mesoporous inorganic antibacterial agent

An inorganic antibacterial agent and mesoporous technology, which is applied in the field of preparation of silver-loaded mesoporous inorganic antibacterial agents, can solve the problems of poor chemical stability and thermal stability, poor stability and heat resistance, and short drug effect duration, etc., to achieve Broad-spectrum antibacterial properties, stable antibacterial performance, and easy-to-control effects

Inactive Publication Date: 2014-05-14
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural antibacterial agents refer to extracting parts of animals and plants with antibacterial functions, but they have poor stability and heat resistance, short duration of drug effects, limited sources, and cannot be produced on a large scale
Organic antibacterial agents are generally chemically synthesized substances such as organic acids, alcohols, and phenols, but their chemical stability and thermal stability are poor, and they are prone to microbial resistance, so they cannot be applied to products such as coatings, plastics, chemical fibers, ceramics, and rubber.

Method used

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  • Preparation method of silver-loaded mesoporous inorganic antibacterial agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Mix polyethylene glycol-polypropylene glycol-polyethylene glycol block copolymer and water uniformly according to the mass percentage of 0.01:1, stir until clear, then add n-butyl titanate and silver nitrate, of which n-titanate The mass percent of butyl ester and polyethylene glycol-polypropylene glycol-polyethylene glycol block copolymer is 0.1:1, and the mass percent of silver nitrate and polyethylene glycol-polypropylene glycol-polyethylene glycol block copolymer is 0.05:1, stirred at 200 rpm for 12 hours, then heated to 50°C, and continued to stir for 6 hours to obtain silver sol;

[0019] (2) Stir the silver sol solution at 300 rpm for 6 hours, and add dropwise an aqueous solution of sodium carbonate with a mass percent concentration of 0.01% in the stirring process until the mol ratio of silver ions and carbonate radicals in the sol solution is 2:1, to obtain titanium dioxide / silver carbonate gel;

[0020] (3) After the titanium dioxide / silver carbonate gel ...

Embodiment 2

[0023] (1) Mix sodium dodecylbenzenesulfonate and water uniformly according to the mass percentage of 0.2:1, stir until clear, then add isopropyl titanate and silver nitrate, wherein isopropyl titanate and dodecylbenzene The mass percentage of sodium sulfonate is 0.5:1, the mass percentage of silver nitrate and sodium dodecylbenzene sulfonate is 0.2:1, stir at 400 rpm for 6 hours, then heat to 80°C, and continue stirring for 2 hours , to obtain silver sol solution;

[0024] (2) Stir the silver sol solution at 500 rpm for 2 hours, and add dropwise an aqueous potassium carbonate solution with a mass percent concentration of 0.01% in the stirring process until the mol ratio of silver ions and carbonate radicals in the sol solution is 2:1, to obtain titanium dioxide / silver carbonate gel;

[0025] (3) After the titanium dioxide / silver carbonate gel was vacuum-dried, it was heat-treated at 800° C. for 2 hours to obtain a silver-loaded mesoporous inorganic antibacterial agent.

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Embodiment 3

[0028] (1) Mix cetyltrimethylammonium bromide and water uniformly according to the mass percentage of 0.1:1, stir until clear, then add ethyl titanate and silver nitrate, wherein ethyl titanate and cetyl trimethylammonium The mass percentage of methyl ammonium bromide is 0.2:1, the mass percentage of silver nitrate and cetyl trimethyl ammonium bromide is 0.1:1, stirred at 350 rpm for 7 hours, then heated to 60°C, Continue stirring for 5 hours to obtain silver sol solution;

[0029] (2) Stir the silver sol solution at 350 rpm for 5 hours, and add dropwise an aqueous ammonium carbonate solution with a mass percent concentration of 0.01% in the stirring process until the mol ratio of silver ions and carbonate radicals in the sol solution is 2:1, to obtain titanium dioxide / silver carbonate gel;

[0030] (3) After the titanium dioxide / silver carbonate gel was vacuum-dried, it was heat-treated at 700° C. for 4 hours to obtain a silver-loaded mesoporous inorganic antibacterial agent...

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Abstract

The invention discloses a preparation method of a silver-loaded mesoporous inorganic antibacterial agent. The preparation method comprises the following steps: dissolving a template agent, a titanium source and silver nitrate in water to obtain a silver sol solution; dropwise adding a carbonate aqueous solution to the silver sol solution and stirring and mixing the solutions to form titanium dioxide / silver carbonate gel; drying the gel and then carrying out thermal treatment, thus obtaining the mesoporous titanium dioxide inorganic antibacterial agent containing elemental silver. The prepared silver-loaded mesoporous inorganic antibacterial agent has specific surface area of 200-800cm<2> / g, aperture of 5-30nm and pore volume of 1.0-5.0cm<3> / g. The mass percent of the elemental silver is 26-30%. The antibacterial agent takes mesoporous titanium dioxide with good mould resistance as a carrier and the elemental silver is loaded in a titanium dioxide matrix, so that the broad-spectrum antibacterial effect of the antibacterial agent can be improved. The preparation method is simple, has the advantages of broad-spectrum antibacterial property, lasting antibacterial effect and stable antibacterial properties and can be widely used in the fields such as ceramics, plastics, textiles, coatings and water treatment.

Description

technical field [0001] The invention relates to a preparation method of an inorganic antibacterial agent, in particular to a preparation method of a silver-loaded mesoporous inorganic antibacterial agent. Background technique [0002] In modern life, there are a large number of viruses, bacteria, fungi and other microorganisms in the environment, which not only pollute the environment, but also directly lead to the occurrence and infection of many diseases, posing a great threat to human health. In recent years, due to the impact of "SARS", "bird flu" and "H1N1 influenza", people's awareness of hygiene has been continuously enhanced, and the demand for antibacterial materials and their products has greatly increased. [0003] Antibacterial agents used by people can be divided into three categories: natural antibacterial agents, inorganic antibacterial agents and organic antibacterial agents. Natural antibacterial agents refer to the parts of animals and plants that have ant...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P1/00A01P3/00
Inventor 朱海霖陈建勇张华鹏
Owner ZHEJIANG SCI-TECH UNIV
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