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Preparation method of mesoporous hollow spherical silver-loaded silicon dioxide antimicrobial

A technology of silicon dioxide and antibacterial agent, applied in the field of preparation of antibacterial agents, can solve the problems of serious agglomeration and high surface activity of nanometer antibacterial powder particles, and achieve the effects of solving agglomeration, increasing silver loading and saving carrier materials

Active Publication Date: 2012-08-01
ZHEJIANG UNIV
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Problems solved by technology

[0003] However, if ordinary materials are used as the carrier of nano-silver particles, due to the high surface activity of nano-antibacterial powder particles, the agglomeration is serious. Therefore, the dispersion and stability of antibacterial nanoparticles in the matrix material must be solved to ensure that the nano-silver particles efficient antibacterial properties

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  • Preparation method of mesoporous hollow spherical silver-loaded silicon dioxide antimicrobial
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Embodiment Construction

[0017] The present invention is further described by examples below.

[0018] A kind of preparation method of silver-loaded hollow mesoporous silica antibacterial agent provided by the invention comprises the following steps:

[0019] (1) Add polystyrene microspheres into the mixed solution of ethanol and deionized water dissolved in cetyltrimethylammonium bromide, stir well and mix well, then add ammonia water, stir at room temperature for 0.5h, then add dropwise Ethyl orthosilicate, continue to stir for 2h, the obtained solution is filtered, washed with absolute ethanol three times, and then dried at room temperature to obtain a composite powder of polystyrene coated with silica microspheres;

[0020] (2) Heating the above composite powder to 550°C at a rate of 1°C / min, keeping it warm for 1-12 hours, stopping heating and cooling in the furnace to obtain hollow silica microspheres;

[0021] (3) Under the condition of avoiding light, add hollow silica microspheres to silver ...

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Abstract

The invention relates to a preparation method of antimicrobial, and aims at providing a preparation method of mesoporous hollow spherical silver-loaded silicon dioxide antimicrobial, which comprises the following steps that polystyrene microspheres are added into mixed solution of ethanol with dissolved hexadecyl trimethyl ammonium bromide and de-ionized water to be uniformly mixed, then ammonia is added, ethyl orthosilicate is gradually dropped, the obtained solution is filtered, washed and dried to obtain compound powder with polystyrene being wrapped by silicon dioxide microspheres; the powder is subjected to heat preservation at the temperature of 550 DEG C to obtain hollow silicon dioxide microspheres; and under a light-resistant condition, the hollow silicon dioxide microspheres are soaked inside silver nitrate solution, and then the solution is filtered, dried and heated to the temperature of 300 to 500 DEG C so as to obtain the mesoporous hollow spherical silver-loaded silicon dioxide antimicrobial. The dispersivity and the stability of silver particles are improved, so that the agglomeration problem of traditional nano antimicrobial powder can be effectively solved. Meanwhile, the antimicrobial can be slowly released through mesoporous, the releasing of silver particles can be effectively maintained for a long time so as to realize the lasting antibacterial effect.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial agent, in particular to a preparation method of a mesoporous hollow spherical silver-loaded silicon dioxide antibacterial agent. Background technique [0002] Traditional antibacterial agents have many deficiencies in terms of safety, antibacterial broad-spectrum, weather resistance, etc., and their antibacterial efficiency is low and the duration of antibacterial effect is short. Due to its unique microstructure, nanomaterials have various excellent properties. The atoms in nano silver particles tend to be in the outer layer of the particles, which have quantum effects, small size effects and large specific surface area, so they have incomparable properties of traditional antibacterial agents. It is an antibacterial agent with high efficiency and weather resistance due to its excellent antibacterial effect and safety. The antibacterial performance of nano-silver particles is far greate...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P1/00
Inventor 杨辉刘艳申乾宏王新敏曹旭丹程笛
Owner ZHEJIANG UNIV
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