Long-acting bacteriostatic spray and its preparation method and application

Abstract

This invention provides a long-lasting antibacterial spray, its preparation method, and its application. The antibacterial spray comprises a polyphenol adhesion component, metal ions, auxiliary polyphenols, a network stabilizer, and water. The metal ions form a dynamically reversible coordination network with the polyphenol adhesion component; the metal ions include silver ions and zinc ions. In this invention, the silver nanoparticles may undergo surface oxidation or coordination dissociation processes in the polyphenol network environment, thus serving as a potential source of supplementary silver ions, contributing to a smoother ion release behavior and achieving long-lasting antibacterial action through ion-nano synergy. This invention utilizes the synergistic effect of silver and zinc ions to improve the physical stability of the system. By introducing a small amount of silver nanoparticles as "solid-phase nodes" in the polyphenol network, the structural stability and resistance to mechanical damage of the antibacterial system are improved without significantly increasing the total silver release.

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