Biodegradable Films Targeting Staphylococcus aureus: Structure-Function Synergies and Interfacial Mechanisms

Area of Science:

• Food Science
• Materials Science
• Microbiology

Background:

• Multidrug-resistant *Staphylococcus aureus* is a significant food safety hazard.
• Petroleum-based food packaging lacks active antimicrobial properties.
• Need for active, biodegradable packaging alternatives is critical.

Purpose of the Study:

• To analyze structure-function relationships in biodegradable films for *S. aureus* inhibition.
• To elucidate synergistic mechanisms of antimicrobial activity.
• To provide a foundation for designing intelligent, responsive food packaging.

Main Methods:

• Comprehensive review of polysaccharide-, protein-, and lipid-based films.
• Evaluation of intrinsic molecular features influencing antibacterial activity.
• Analysis of composite systems and their synergistic pathways.

Main Results:

• Intrinsic molecular features (e.g., chitosan charge, fatty acid assembly) impact antibacterial activity.
• Three synergistic pathways identified: physical barrier, chemical interference, and biological regulation.
• Composite systems enhance performance through charge complementarity and controlled release.

Conclusions:

• Biodegradable films can be rationally designed for targeted *S. aureus* inhibition.
• Synergistic approaches and composite materials offer superior antimicrobial efficacy.
• Intelligent, stimuli-responsive packaging is a promising direction for food safety.