Laboratory of Enzyme Engineering and Microbiology, National School of Engineering of Sfax (ENIS), University of Sfax, P.O. Box 1173, Sfax 3038, Tunisia.
Laboratory of Enzyme Engineering and Microbiology, National School of Engineering of Sfax (ENIS), University of Sfax, P.O. Box 1173, Sfax 3038, Tunisia; Department of Life Sciences, Faculty of Science of Gabes, Omar Ibn Khattab Street, Gabes 6029, Tunisia.
Carbohydr Polym. 2020 May 15;236:116063. doi: 10.1016/j.carbpol.2020.116063. Epub 2020 Feb 24.
The aim of this work was to explore the effect of various molecular weight (Mw) chitosan depolymerization products (CDP) on the silver nanoparticles (AgNPs) and chitosan/AgNPs blend films production. Produced AgNPs, stable during 30 days in a colloïdal form, were characterized in terms of UV-vis, transmission electron microscopy (TEM), dynamic light scattering (DLS) and fourier transform infrared spectroscopy (FTIR) analyses. AgNPs displayed interesting antibacterial and antioxidant properties that were affected by the physicochemical properties of used chitosans. Interestingly, CDP may be used for the preparation of bioactive and stable AgNPs. Additionally, chitosan/AgNPs blend films were prepared and characterized in terms of physiochemical and biological properties. As compared to the chitosan film, various properties were enhanced in the chitosan/AgNPs blend films, including light barrier, opacity, elongation at break, as well as bioactivities, thus suggesting that films could be used as novel alternative food packaging applications.
本工作旨在探索不同分子量（Mw）壳聚糖解聚物（CDP）对银纳米颗粒（AgNPs）和壳聚糖/AgNPs 共混膜制备的影响。所制备的 AgNPs 在胶体形式下稳定 30 天，通过紫外-可见分光光度法、透射电子显微镜（TEM）、动态光散射（DLS）和傅里叶变换红外光谱（FTIR）分析进行了表征。AgNPs 表现出有趣的抗菌和抗氧化性能，这受到所使用壳聚糖的物理化学性质的影响。有趣的是，CDP 可用于制备具有生物活性和稳定性的 AgNPs。此外，还制备了壳聚糖/AgNPs 共混膜，并从物理化学和生物学性质方面进行了表征。与壳聚糖膜相比，壳聚糖/AgNPs 共混膜的各种性能得到了增强，包括阻隔性能、不透明度、断裂伸长率以及生物活性，这表明这些膜可用作新型替代食品包装应用。
