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Silver-containing silicon-based mesoporous antibacterial agent and preparation method thereof

An antibacterial agent and mesoporous-based technology, which is applied in the field of silver-containing silicon-based mesoporous antibacterial agent and its preparation, can solve the problems of low loading, discoloration of antibacterial agent, and reduced silver antibacterial activity, and achieve simple preparation process and antibacterial Long-lasting effect and stable antibacterial performance

Inactive Publication Date: 2010-06-23
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the loading capacity is not high, and the antibacterial active silver is easy to migrate to the surface to undergo redox, which reduces the antibacterial activity and discolors the antibacterial agent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve 5.00 g of P123 in 161.7 mL of deionized water, add hydrochloric acid to make the pH of the solution lower than 2, stir until it settles, add 14.75 g of tetraethyl orthosilicate, 0.068 g of silver nitrate, and stir at 50°C for 72 hours , to obtain a sol-gel solution, vacuum-dry the sol-gel, then wash with ethanol once, and vacuum-dry, and bake the product after the vacuum-drying of the appeal at 500°C for 2 hours under a protective gas; wherein the protective gas is nitrogen, to obtain Mesoporous materials. Marked as sample A, finally used for Escherichia coli antibacterial experiment. (silver content 1%).

Embodiment 2

[0021] Dissolve 4.50 g of F104 in 445.5 mL of deionized water, add sulfuric acid to make the pH of the solution lower than 2, stir until it settles, add 24.03 g of butyl orthosilicate, 1.77 g of silver nitrate, and stir at 80°C for 48 hours. Obtain the sol-gel liquid, dry the sol-gel in vacuum, then wash with ethanol twice, dry in vacuum, the product after the vacuum drying will be roasted for 5 hours at 300° C. under a protective gas; wherein the protective gas is nitrogen, to obtain medium hole material. Marked as sample B, finally used for E. coli antibacterial experiment. (silver content 20%).

Embodiment 3

[0023] 1) Dissolve 3 grams of F65 in 597 mL of deionized water, add nitric acid to make the pH of the solution lower than 2, stir until it settles, add 10.15 g of methyl orthosilicate, 0.70 g of silver nitrate, and stir at 60°C for 60 hours , to obtain a sol-gel solution, dry the sol-gel in vacuum, then wash 3 times with ethanol, and dry in vacuum. The product after the vacuum drying was roasted for 4 hours under a protective gas at 400 ° C; wherein the protective gas is hydrogen, and the obtained Mesoporous materials. Marked as sample C, finally used for Escherichia coli antibacterial experiment. (silver content 10%).

[0024] In the above example, P123 is EO 20 PO 70 EO 20 , F104 is EO 27 PO 61 EO 27 , F65 is EO 20 PO 30 EO 20 , EO is ethylene oxide, and PO is propylene oxide.

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PUM

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Abstract

The invention discloses a silver-containing silicon-based mesoporous antibacterial agent and a preparation method thereof. The method comprises the following steps: mixing structure-directing agent of polyethylene glycol-polypropylene glycol-polyethylene glycol block copolymer, deionized water and acid, adding silicon source and silver source, then heating, continuously stirring to obtain sol-gel, drying sol-gel in vacuum, then washing with ethanol, drying in vacuum; and roasting the product of vacuum drying in protective gas. The antibacterial active silver is added during the preparation process of the mesoporous material, so that the silver ion can be deposited on the hole wall of mesoporous, then a physical or chemical method is used to remove the structure-directing agent of mesoporous and finally the silver-containing mesoporous inorganic antibacterial agent is prepared. The antibacterial agent is characterized in that the content of the antibacterial active body is easy to control, the preparation method is easy, the antibacterial property is strong and stable, the antibacterial effect can last for long time, the color of the antibacterial agent is not easy to change, the antibacterial agent is nontoxic, etc. The antibacterial agent can be widely used in fields such as ceramics, plastics, textile, coatings, water treatment and the like.

Description

technical field [0001] The invention relates to a mesoporous inorganic antibacterial agent and a preparation method thereof, in particular to a silver-containing silicon-based mesoporous antibacterial agent and a preparation method thereof. Background technique [0002] With the development of science and technology and the improvement of people's living standards and awareness of healthy environment, people put forward requirements for antibacterial, sterilizing, anti-mildew and disinfection for daily necessities such as daily necessities, household appliances, decorative materials, building materials, ceramic products, etc. . Therefore, the production of antibacterial agents and their products with sterilization, antibacterial, antiseptic, anti-mildew and disinfection functions will become an important emerging industry in our country. [0003] Classification of antibacterial agents There are many types of antibacterial agents with different properties and different class...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N25/08A01P1/00
Inventor 冯新星陈建勇张华鹏朱海霖周岚
Owner ZHEJIANG SCI-TECH UNIV
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