Demirbas Ayse, Karsli Baris
Department of Seafood Processing Technology, Faculty of Fisheries, Recep Tayyip Erdogan University, 53100 Rize, Türkiye.
Department of Seafood Processing Technology, Faculty of Fisheries, Recep Tayyip Erdogan University, 53100 Rize, Türkiye.
Food Chem. 2025 Mar 1;467:142363. doi: 10.1016/j.foodchem.2024.142363. Epub 2024 Dec 4.
This study investigates the green synthesis of chitosan-based silver nanoparticles (Ag NPs) and their application as antimicrobial coatings for food preservation. The effects of three coatings were evaluated on refrigerated tomatoes over 22 days: distilled water (control), 1 % chitosan (CH), and chitosan-based Ag NPs (Ag/CH). The synthesized Ag/CH was characterized by FT-IR, UV-vis spectroscopy, SEM, TEM, DLS, and XRD, confirming successful synthesis and a crystalline face-centered cubic structure. Antimicrobial activity, evaluated using the disk diffusion method, showed that Ag/CH coatings demonstrated superior antibacterial properties, with inhibition zones ranging from 9.19 to 11.07 mm. The Ag/CH coating effectively maintained tomato quality, with minimal changes in pH, color, and microbial counts. Although silver migration occurred, it remained within safety limits. This study addresses a gap in the literature by investigating the effects of chitosan-based silver nanoparticles on tomato quality and metal migration, demonstrating their potential as a sustainable solution for food preservation.
本研究探讨了基于壳聚糖的银纳米颗粒（Ag NPs）的绿色合成及其作为食品保鲜抗菌涂层的应用。在22天内评估了三种涂层对冷藏番茄的影响：蒸馏水（对照）、1%壳聚糖（CH）和基于壳聚糖的Ag NPs（Ag/CH）。通过傅里叶变换红外光谱（FT-IR）、紫外可见光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、动态光散射（DLS）和X射线衍射（XRD）对合成的Ag/CH进行了表征，证实了合成成功且具有面心立方晶体结构。使用纸片扩散法评估的抗菌活性表明，Ag/CH涂层表现出优异的抗菌性能，抑菌圈范围为9.19至11.07毫米。Ag/CH涂层有效地保持了番茄的品质，pH值、颜色和微生物数量变化最小。虽然发生了银迁移，但仍在安全限度内。本研究通过研究基于壳聚糖的银纳米颗粒对番茄品质和金属迁移的影响，填补了文献中的空白，证明了它们作为食品保鲜可持续解决方案的潜力。
