Pathogenic microbial contamination and infection, especially microbial adhesion and subsequent formation of biofilm, with robust resistance to antimicrobial agents are a critical public health issue. Conventional strategies are significantly limited either by biofouling or by the irreversible consumption of antimicrobial agents. Herein, we reported a robust methodology to create rechargeable antimicrobial poly(vinyl alcohol-co-ethylene) films (SBMA@HAF films) with antifouling function via chemically incorporating both N-halamine moieties (HAF) and zwitterionic moieties (SBMA). The promise of the design exhibited three features to defend bacteria: (i) zwitterionic moieties can effectively resist some bacteria away from the films, (ii) once the bacteria attached on the film surface, N-halamine with rechargeable robust biocidal activity can rapidly kill the bacteria, and (iii) the generated bacteria debris can be easily released to avoid the biofilm formation due to the superhydrophilicity of zwitterions. The resulting SBMA@HAF films exhibit integrated properties of high transparency, robust mechanical property, great hydrophilicity, ease of chlorine recharging (&gt;250 ppm), long-term stability, high biocidal activity (&gt;99.9999% via contact killing), and promising antifouling functions, which enabled the SBMA@HAF films served as a biocidal material for food packaging application.

Rechargeable antibacterial N-halamine films with antifouling function for food packaging applications

2019 Spring National Meeting

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