Advanced Antibacterial Packaging for Food Preservation Through Multifunctional Metal–Organic Framework Nanocomposite

Pathogenic microorganisms pose significant challenges in food preservation, leading to postharvest losses, economic losses, and health risks. To meet these challenges, an effective strategy is developed for antibacterial food packaging using a multifunctional metal–organic framework nanocomposite (ZIF-67@TA/CNF) composed of zeolitic imidazolate framework-67 (ZIF-67), tannic acid (TA), and chitin nanofiber (CNF). The ZIF-67@TA/CNF composite is fabricated into a biodegradable film with enhanced physicochemical properties, including superior mechanical strength and thermal stability performance. The ZIF-67@TA/CNF film demonstrates extraordinary antibacterial activity, achieving inactivation rates of 99.63% for multidrug-resistant (MDR) Escherichia coli, 99.89% for Escherichia coli, 99.67% for Staphylococcus aureus, and 98.83% for MDR Staphylococcus aureus. For proof of application, the ZIF-67@TA/CNF film effectively inhibits microbial growth and maintains fruit integrity, extending the shelf life for strawberry preservation. This study highlights ZIF-67@TA/CNF as a promising nanocomposite material for sustainable and efficient food packaging applications.