Method for preparing sustained-release silver-based antibacterial agent

Abstract

The invention relates to the preparation of an antibacterial agent and aims to provide a method for preparing a sustained-release silver-based antibacterial agent, which comprises the following steps of: adding polystyrene sphere into concentrated sulfuric acid, stirring for 2 to 8 hours, centrifuging repeatedly, washing, dispersing into absolute ethanol, and obtaining dispersion of sulfonated polystyrene; adding aqueous solution of stannous chloride, stirring at room temperature, centrifuging, washing and adding a solid product into a tollens' reagent of sodium potassium tartrate tetrahydrate, stirring at room temperature, adding isopropanol, and obtaining silver and polystyrene composite sphere dispersion; adding tetraethyl orthosilicate and ammonia water and stirring at room temperature; and centrifuging the product, washing and calcining at 550 DEG C and obtaining the sustained-release silver-based antibacterial agent. When the method is used, silver loaded onto the inner walls of silicon dioxide sphere shells can disperse to the outside of the sphere shells from meso pores on the sphere shells, thereby producing an antibacterial effect; and problems of active ingredient loss and low antibacterial capacity of the conventional antibacterial agents due to the silver loaded on the outside surface of the material can be solved.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial agent, in particular to a preparation method of a slow-release silver-based antibacterial agent. Background technique [0002] At present, the application fields of antibacterial materials are becoming more and more extensive. From the fiber clothing that is worn daily, to the household appliances commonly used in the home, sanitary ceramic products, plastic films, deodorant processing, steel plates and coatings for construction, etc., they have been or are being gradually adopted antimicrobial technology. Traditional antibacterial agents are mainly organic antibacterial agents. With the development of science and technology, inorganic antibacterial agents have gradually replaced organic antibacterial agents. greatly improved. Inorganic antibacterial agents mainly use silicate compounds (or minerals) as carriers, adding metal ions such as silver, copper, and zinc, among which silver io...

AI Technical Summary

Problems solved by technology

However, with the improvement of living standards, people's requirements for antibacterial materials are getting higher and higher, especially for the stability and durability of antibacterial materials. Poor stability and low antibacterial persistence

Images