The precipitate structure of copper-based antibacterial and antiviral agents enhances their longevity for kitchen use

The transmission of bacteria via cooking surfaces, handles, and infrequently cleaned cookware is a public health concern. This study evaluates a copper ion-based mixed solution (CBMS) containing only inorganic ions with controlled acidity as a new antibacterial and antiviral agent for kitchen and related environments. Structural analyses revealed strongly bonded scaly copper dispersion (SBSCD) precipitates, a few micrometres in size, formed on substrates after drying. The antibacterial copper components evolve over time after application, a mechanism linked to sustained antibacterial performance. CBMS demonstrated high safety for human use and was applicable to stainless steels used in kitchens and tables, exhibiting sustained antibacterial and antiviral effects over extended periods.

Takashi Nishimura, Masami Hashimoto, Kageto Yamada, Ryuji Iwata, Kazuhiro Tateda