BioNanocomposite Research Center, Department of Food and Nutrition, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea.
BioNanocomposite Research Center, Department of Food and Nutrition, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea.
Food Chem. 2024 Oct 15;455:139911. doi: 10.1016/j.foodchem.2024.139911. Epub 2024 May 29.
Ti-metal organic framework (Ti-MOF) doped with carbon dots (CDs) with enhanced antibacterial potential was synthesized using solvothermal-assisted mechanical stirring and used for the fabrication of CMC/Agar-based active packaging films. The incorporation of CD@Ti-MOF not only improved the tensile strength of the CMC/Agar film by 17.4% but also exhibited strong antioxidant activity with 100% of ABTS and 57.8% of DPPH radical scavenging using 0.64 cm/mL of CMC/Agar/CD@Ti-MOF film. Furthermore, water vapor permeability, oxygen permeability, and ultraviolet light-blocking ability (95.7% of UV-B and 84.7% of UV-A) were improved significantly. The CMC/Agar/CD@Ti-MOF film showed strong antibacterial activity and could inhibit the progress of E. coli up to 8.2 Log CFU/mL and completely stopped the growth of L.monocytogenes after 12 h of incubation. Additionally, CMC/Agar/CD@Ti-MOF film extended the shelf life of cherry tomatoes preserved at 4 °C and delayed the quality degradation, maintaining the visual aspects of the packaging.
采用溶剂热辅助机械搅拌法合成了具有增强抗菌潜力的掺碳点钛金属有机骨架（Ti-MOF），并将其用于制备 CMC/琼脂基活性包装膜。CD@Ti-MOF 的掺入不仅将 CMC/琼脂膜的拉伸强度提高了 17.4%，而且在 0.64 cm/mL 的 CMC/琼脂/CD@Ti-MOF 膜下，对 ABTS 和 DPPH 自由基的清除率分别达到 100%和 57.8%，表现出较强的抗氧化活性。此外，水蒸气透过率、氧气透过率和紫外线阻挡能力（UV-B 为 95.7%，UV-A 为 84.7%）也显著提高。CMC/琼脂/CD@Ti-MOF 膜具有较强的抗菌活性，可将大肠杆菌的生长抑制到 8.2 Log CFU/mL，在孵育 12 小时后完全阻止单核细胞增生李斯特菌的生长。此外，CMC/琼脂/CD@Ti-MOF 膜延长了保存在 4°C 的樱桃番茄的货架期，延缓了质量下降，保持了包装的视觉效果。
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