ABSTRACT

This work aimed to enhance the surface properties of common food packaging materials (PVC, PS, PET, PVDC) by applying a TiO₂ nano thin film coating. Physical and chemical analyses confirmed a well-defined anatase phase film. PET showed the highest antibacterial activity, followed by PVDC, PS, and PVC. After 60 min of UV-A irradiation, E. coli elimination rates were 99.85% (PET), 97.14% (PVDC), 96.5% (PS), and 85.91% (PVC). Similarly, for S. Typhimurium, the respective rates were 97.8% (PET), 83.71% (PVDC), 74.79% (PS), and 68.94% (PVC). Complete eradication of both strains occurred within 120 min (E. coli) and 180 min (S. Typhimurium). Durability testing revealed PET's mass loss of 97 mg/kg after 15 cycles, while PVC had the lowest value of 7 mg/kg. These findings demonstrate that TiO₂ thin film-coated substrates effectively inhibit bacteria growth, extending food product shelf life.

摘要

_{这项工作旨在通过应用TiO 2}纳米薄膜涂层来增强常见食品包装材料（PVC、PS、PET、PVDC）的表面性能。物理和化学分析证实了清晰的锐钛矿相薄膜。PET 的抗菌活性最高，其次是 PVDC、PS 和 PVC。UV-A照射60分钟后，大肠杆菌消除率分别为99.85%（PET）、97.14%（PVDC）、96.5%（PS）和85.91%（PVC）。同样，对于鼠伤寒沙门氏菌，相应的比率分别为 97.8% (PET)、83.71% (PVDC)、74.79% (PS) 和 68.94% (PVC)。两种菌株均在 120 分钟（大肠杆菌）和 180 分钟（鼠伤寒沙门氏菌）内完全根除。耐久性测试显示，15 个循环后，PET 的质量损失为 97 毫克/千克，而 PVC 的质量损失最低，为 7 毫克/千克。这些发现表明 TiO ₂薄膜涂层基材可有效抑制细菌生长，延长食品保质期。