富含银纳米颗粒的洋酸模根和普洱茶提取物活性双层膜。
Active Double-Layered Films Enriched with AgNPs in Great Water Dock Root and Pu-Erh Extracts.
作者信息
Jamróz Ewelina, Cabaj Agnieszka, Juszczak Lesław, Tkaczewska Joanna, Zimowska Małgorzata, Cholewa-Wójcik Agnieszka, Krzyściak Paweł, Kopel Pavel
机构信息
Department of Chemistry, University of Agriculture, ul. Balicka 122, 30-149 Kraków, Poland.
Department of Food Analysis and Evaluation of Food Quality, University of Agriculture, ul. Balicka 122, 30-149 Krakow, Poland.
出版信息
Materials (Basel). 2021 Nov 16;14(22):6925. doi: 10.3390/ma14226925.
A novel, eco-friendly, and biocompatible method was applied to form silver nanoparticles (AgNPs) in great water dock () (KB) and pu-erh () (PE) extracts. The surface plasma resonance peak of green synthesized AgNPs at 451.8 nm for AgNPs+KB and 440.8 nm for AgNPs+PE was observed via spectral analysis of UV absorbance. In this study, double-layered biopolymer films (FUR/CHIT+HGEL) with AgNPs incorporated in KB solution (AgNPs+KB) and AgNPs in PE solution (AgNPs+PE), were successfully prepared using the casting method. The SEM, XRD, zeta potential and size analyses confirmed the presence of AgNP in the films. The addition of AgNPs in plant extracts improved antimicrobial and antioxidant activity and thermal stability, whereas WVTR experienced a decrease. The nanocomposite films' orange-brown colour may aid in the protection of food products against UV rays. The composite films demonstrated antibacterial activity against food-borne pathogens and may offer potential in food packaging applications.
一种新颖、环保且具有生物相容性的方法被应用于在皱叶酸模（KB）和普洱茶（PE）提取物中制备银纳米颗粒（AgNPs）。通过紫外吸光度光谱分析，观察到绿色合成的AgNPs在451.8 nm处（AgNPs+KB）和440.8 nm处（AgNPs+PE）出现表面等离子体共振峰。在本研究中，采用流延法成功制备了在KB溶液中掺入AgNPs（AgNPs+KB）和在PE溶液中掺入AgNPs（AgNPs+PE）的双层生物聚合物薄膜（FUR/CHIT+HGEL）。扫描电子显微镜（SEM）、X射线衍射（XRD）、zeta电位和尺寸分析证实了薄膜中存在AgNP。在植物提取物中添加AgNPs提高了抗菌和抗氧化活性以及热稳定性，而水蒸气透过率（WVTR）有所降低。纳米复合薄膜的橙棕色可能有助于保护食品免受紫外线照射。复合薄膜对食源性病原体表现出抗菌活性，并可能在食品包装应用中具有潜力。
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