Department of Food Engineering and Bionanocomposite Research Institute, Mokpo National University, 61 Dorimri, Chungkyemyon, Muangun, 534-729 Jeonnam, Republic of Korea.
Department of Food Engineering and Bionanocomposite Research Institute, Mokpo National University, 61 Dorimri, Chungkyemyon, Muangun, 534-729 Jeonnam, Republic of Korea.
Carbohydr Polym. 2016 Aug 1;146:208-16. doi: 10.1016/j.carbpol.2016.03.026. Epub 2016 Mar 15.
Alginate-based films reinforced with different types of silver particles such as metallic silver (AgM), silver zeolite (AgZ), citrate reduced silver nanoparticles (AgNP(C)), laser ablated silver nanoparticles (AgNP(LA)), and silver nitrate (AgNO3) were prepared using a solvent casting method and the effect of silver particles on the optical, mechanical, water vapor barrier, and antimicrobial properties the composite films was evaluated. Size and shape of the silver particles were varied depending on the types of silver source and the preparation method. The alginate films incorporated with AgNP(C), AgNP(LA), and AgNO3 showed a characteristic surface plasmon resonance absorption peaks of AgNPs around 420nm. Film properties such as mechanical, optical, and water vapor barrier properties were greatly influenced by the types of AgNPs used. Alginate/AgNPs composite films except AgM and AgNP(LA) incorporated ones exhibited strong antimicrobial activity against two food-borne pathogenic bacteria, Escherichia coli and Listeria monocytogenes. The developed films have a high potential for the application as antimicrobial food packaging films.
采用溶剂浇铸法制备了不同类型的银粒子（如金属银（AgM）、银沸石（AgZ）、柠檬酸还原的银纳米粒子（AgNP(C)）、激光烧蚀的银纳米粒子（AgNP(LA)）和硝酸银（AgNO3））增强的海藻酸钠基薄膜，并评估了银粒子对复合薄膜的光学、机械、水蒸气阻隔和抗菌性能的影响。银粒子的尺寸和形状取决于银源的类型和制备方法。掺入 AgNP(C)、AgNP(LA)和 AgNO3 的海藻酸钠膜在 420nm 左右表现出 AgNPs 的特征表面等离子体共振吸收峰。薄膜性能如机械性能、光学性能和水蒸气阻隔性能受所用 AgNPs 的类型影响很大。除了 AgM 和 AgNP(LA)掺入的海藻酸钠/AgNPs 复合膜外，其他复合膜对两种食源性病原体大肠杆菌和单核细胞增生李斯特菌均表现出较强的抗菌活性。开发的薄膜在作为抗菌食品包装薄膜方面具有很高的应用潜力。
