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Method for preparing antibacterial powder loaded with monodisperse silver nanometer mesoporous silica

A technology of mesoporous silica and antibacterial powder is applied in the field of antibacterial materials, which can solve the problems of easy falling off and the inability of nano silver to be firmly fixed, and achieve the effects of lasting antibacterial effect, high sterilization rate and good application prospect.

Inactive Publication Date: 2013-04-17
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mesoporous silver-loaded antibacterial agent synthesized by this technology is an antibacterial agent obtained by calcining the synthesized material itself in the later stage. The nano-silver on the surface cannot be firmly fixed on the mesoporous material. It is easy to fall off after friction. For example, Ag / MCM-41 antibacterial agent is an antibacterial agent obtained by synthesizing mesoporous MCM-41 first, then soaking it with ultrasonic waves, and finally calcining it.

Method used

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  • Method for preparing antibacterial powder loaded with monodisperse silver nanometer mesoporous silica
  • Method for preparing antibacterial powder loaded with monodisperse silver nanometer mesoporous silica
  • Method for preparing antibacterial powder loaded with monodisperse silver nanometer mesoporous silica

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Experimental program
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Effect test

Embodiment 1

[0056] 1. The reaction raw materials are as follows:

[0057] CTAB (0.2g), deionized water (100ml), 2M NaOH solution (1.0ml), methanol solution of TEOS (2ml of TEOS diluted with 5ml of methanol), TSD (0.5ml) modified AgNO 3 (1.0wt%, this concentration is the concentration of the silver salt solution before modification) solution, 35-40wt% formaldehyde aqueous solution is formalin (2ml)

[0058] 2. Reaction temperature: 75°C

[0059] 3. Preparation steps of antibacterial powder:

[0060] 1) Add 0.2g of CTAB into a three-necked flask equipped with 100ml of deionized water and 1.0ml of NaOH solution (2M), the reaction temperature is 75°C, after the solution is stirred and clarified, first add 3ml of methanol solution of TEOS dropwise , stir for 10min;

[0061] 2) Add 10ml of AgNO modified with TSD (0.5ml) dropwise to the reaction system of step 1) by double injection 3 (1.0wt%, this concentration is the concentration of the silver salt solution before modification) solution a...

Embodiment 2

[0078] 1. The reaction raw materials are as follows:

[0079] CTAB (0.4g), deionized water (130ml), 2M NaOH solution (1.5ml), methanol solution of TEOS (3ml of TEOS diluted with 10ml of methanol), TSD (1.5ml) modified AgNO 3 (0.6wt%, this concentration is the concentration of silver salt solution before modification) solution, 35-40wt% formaldehyde aqueous solution is formalin (5ml)

[0080] 2. Reaction temperature: 85°C

[0081] 3. Preparation steps of antibacterial powder:

[0082] 1) Add 0.4g of CTAB into a three-necked flask equipped with 130ml of deionized water and 1.5ml of NaOH solution (2M), the reaction temperature is 85°C, after the solution is stirred and clarified, first add 3ml of methanol solution of TEOS dropwise , stir for 10min;

[0083]2) Add 10ml of AgNO modified with TSD (1.5ml) dropwise to the reaction system in step 1) by double injection 3 (0.6wt%, this concentration is the concentration of the silver salt solution before modification) solution and s...

Embodiment 3

[0090] 1. The reaction raw materials are as follows:

[0091] CTAB (0.3g), deionized water (110ml), 2M NaOH solution (2.0ml), methanol solution of TEOS (3ml of TEOS diluted with 8ml of methanol), TSD (0.3ml) modified AgNO 3 (0.3wt%, this concentration is the concentration of the silver salt solution before modification) solution, the formaldehyde aqueous solution of 35-40wt% is formalin (3ml)

[0092] 2. Reaction temperature: 60°C

[0093] 3. Preparation steps of antibacterial powder:

[0094] 1) Add 0.3g of CTAB into a three-necked flask equipped with 110ml of deionized water and 2.0ml of NaOH solution (2M), the reaction temperature is 60°C, after the solution is stirred and clarified, first add 1ml of TEOS methanol solution dropwise , stir for 10min;

[0095] 2) Add 10ml of AgNO modified with TSD (0.3ml) dropwise to the reaction system of step 1) by double injection 3 (1.0wt%, this concentration is the concentration of the silver salt solution before modification) soluti...

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Abstract

The invention provides a method for preparing antibacterial powder loaded with monodisperse silver nanometer mesoporous silica, and belongs to the technical field of antibacterial materials; the preparation method adopts a quaternary ammonium salt cationic surfactant as a template, and adopts ethyl orthosilicate as a silicon source; the antibacterial powder is prepared by using a double injection method under an alkaline condition; the obtained powder has a particle size being between dozens of nanometers and hundreds of nanometers; the nanometer silver on the powder has good dispersibility; the original ordered channel structure of mesoporous silica is maintained; the product has a high bacteriostasis rate, and simple synthetic steps, and is widely applicable to antibacterial materials such as fibers, plastics, ceramics, and the like.

Description

technical field [0001] The invention relates to a method for preparing an antibacterial mesoporous material, in particular to a method for preparing a monodisperse silver nanometer mesoporous silicon oxide antibacterial powder, which belongs to the field of antibacterial materials. Background technique [0002] With the rapid development of science and technology and the improvement of living standards, people have higher and higher requirements for physical health and healthy daily life. Therefore, the health of the working and living environment and daily necessities has undoubtedly become a development trend today. In 1996, a nationwide incident of pathogenic Escherichia coli O-157 infection occurred in Japan, which caused panic all over the world, and also triggered a climax in the development and application of antibacterial agents. Later, the "mad cow disease" in the EU countries, the "anthrax" virus in the United States, the malaria and cholera after the Indian Ocean...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P1/00B82Y30/00B82Y40/00
Inventor 张伟蒋兴宇蔡强齐娟娟
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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