Abstract Poly (butylene adipate-co-terephthalate) (PBAT)/ magnesium oxide (MgO)/ silver (Ag) ternary composite biofilms were prepared via a common solvent casting method and used for food packaging. The effects of MgO/Ag nanoparticles (NPs) on the physical and antibacterial properties of the composite biofilms were comprehensively investigated. The physical properties of the PBAT matrix, such as the mechanical and barrier properties, are improved by the incorporation of MgO/Ag NPs. The composite films with 3 wt% NPs content exhibit the optimal properties. Specifically, the tensile strength, the elongation at break, water barrier property, and oxygen barrier property are 11.91 MPa, 415.63 %, 1.135 kg·m/m²·s·Pa, and 3.679 Barrer, respectively. Furthermore, the inhibition rates of ternary composite film against Escherichia coli and Staphylococcus aureus exceed 90 %, indicating potential for application in the food packaging industry.

中文翻译：

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用于食品包装应用的聚（己二酸丁二醇酯-共对苯二甲酸酯）/氧化镁/银三元复合生物膜

摘要 聚（己二酸丁二醇酯-共对苯二甲酸酯）（PBAT）/氧化镁（MgO）/银（Ag）三元复合生物膜通过常见的溶剂浇铸方法制备，用于食品包装。综合研究了 MgO/Ag 纳米粒子 (NPs) 对复合生物膜的物理和抗菌性能的影响。PBAT 基体的物理性能，如机械和阻隔性能，通过加入 MgO/Ag NPs 得到改善。具有 3 wt% NPs 含量的复合薄膜表现出最佳性能。具体而言，拉伸强度、断裂伸长率、阻水性和阻氧性分别为11.91MPa、415.63%、1.135kg·m/m2·s·Pa和3.679 Barrer。此外，