Progress in the application of spray-type antibacterial coatings for disinfection

The heavy use of disinfection products promotes the spread of bacterial resistance. Covering the surface of objects in daily contact with antibacterial coatings can effectively avoid the overuse of disinfection products. Compared with other coating formation techniques like dipping and electroplating, spraying has benefits including simple operation and promising applications, promoting their high-volume utilization in daily life and industry. Focusing on inorganic, organic, and natural antibacterial agents, this article summarizes the mechanism and application of antibacterial agents in spray-type coatings to find out the formation mechanism of spray-type coatings. In addition, this article also reviews the performance of coatings under different spraying parameters to seek the factors affecting the spraying effect. Despite the types of antibacterial agents are diverse and their components are different, all of them can form spray coatings around three aspects: electrostatic interaction, cross-linking reaction, and metal bonding. Moreover, in the spraying process, the factors such as spraying time, distance, pressure, and viscosity affect the structure and morphology of the coating.