Method for preparing novel titanium dioxide silver-doped antibacterial agent

Abstract

The invention relates to the preparation of an antibacterial agent and provides a method for preparing a novel titanium dioxide silver-doped antibacterial agent. The method comprises the following steps of: (1) adding a complexing agent into a silver nitrate ethanol solution, fully and uniformly stirring under the shading condition and carrying out reflux reaction under the water bath condition to obtain chelate silver-contained sol; (2) dropwise adding a mixed solution of tetrabutyl titanate and anhydrous ethanol into an aqueous solution with the pH of 1-2.5 under the stirring condition, refluxing under the water bath condition and finally adjusting the pH to 3-6 to obtain titanium dioxide grain sol; (3) dropwise adding the chelate silver-contained sol into the titanium dioxide grain solunder the stirring condition, refluxing and ageing under the water bath condition and then obtaining the titanium dioxide silver-doped antibacterial agent. The invention agglomerate silver ions on the surface of a titanium dioxide grain by adopting a wet-chemical method and utilizing a chelate technology and a sol-gel hydrolytic polymerization control technology, realizes the uniform complexing of silver and titanium dioxide at a nano size and endows materials with favorable antibacterial capability.

Description

Technical field [0001] The invention relates to the preparation of an antibacterial agent, in particular to a method for preparing a new type of titanium dioxide doped silver antibacterial agent. Background technique [0002] Antibacterial agents are a kind of preparations whose main function is to kill and inhibit the growth of microorganisms. According to their different matrix materials, they can be divided into two types: organic antibacterial agents and inorganic antibacterial agents. [0003] Organic antibacterial agents refer to antibacterial agents that use organic acids, phenols, quaternary ammonium salts, benzimidazoles and other organic substances as antibacterial substances. Organic antibacterial agents are the earliest antibacterial materials that have attracted people’s attention. They have a wide variety and low production cost. However, organic antibacterial agents generally have the disadvantages of poor heat resistance (generally below 200°C), strong specificity, ...

AI Technical Summary

Problems solved by technology

However, in order to obtain crystalline titanium dioxide and promote the effective combination of the two, the traditional titanium dioxide-doped silver antibacterial agent often requires a subsequent heat treatment process, which consumes a lot of energy and limits the scope of application.

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