果胶
银纳米粒子
纳米复合材料
复合数
抗菌活性
纳米颗粒
核化学
傅里叶变换红外光谱
化学
化学工程
表面等离子共振
热稳定性
材料科学
纳米技术
有机化学
复合材料
细菌
食品科学
生物
工程类
遗传学
作者
Nadjat Ardjoum,Shiv Shankar,Nacéra Chibani,Stéphane Salmieri,Monique Lacroix
标识
DOI:10.1016/j.foodhyd.2021.107000
摘要
The present study reports in situ synthesis of silver nanoparticles (AgNPs) in pectin matrix using γ-irradiation at 2.5 and 5 kGy and preparation of antibacterial pectin-based nanocomposite films. The FE-SEM micrographs showed that the neat pectin film was smooth but became a little rough after forming AgNPs in the pectin films. The UV–visible spectroscopy analysis exhibited a surface plasmon resonance (SPR) band about 430 nm confirming the formation of AgNPs in the pectin films. The Hunter color values of nanocomposite film changed after the formation of AgNPs. FTIR and thermogravemetric analysis results revealed no structural and thermal stability changes in the pectin films after the synthesis of AgNPs by γ-irradiation. However, mechanical properties and water vapor permeability of the composite films improved after AgNPs synthesis. The pectin-AgNPs nanocomposite films exhibited potent antibacterial activity against Escherichia coli and Salmonella Typhimurium. The developed antibacterial pectin-based nanocomposite films incorporated with AgNPs using γ-irradiation have a potential to increase the shelf life of packaged food.
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