One-step preparation of banana powder/silver nanoparticles composite films

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• 作者：Aungkana Orsuwan ; Shiv Shankar ; Long-Feng Wang…
• 关键词：Banana powder ; Silver nanoparticles ; One ; step preparation ; Composite films ; Antimicrobial activity
• 刊名：Journal of Food Science and Technology
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：54
• 期：2
• 页码：497-506
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Food Science; Nutrition; Chemistry/Food Science, general;
• 出版者：Springer India
• ISSN：0975-8402
• 卷排序：54

文摘

Silver nanoparticles (Ag-NPs) were synthesized using banana powder as a reducing and stabilizing agent, and banana/Ag-NPs composite films with different concentration of Ag-NPs were prepared simultaneously. The composite films were yellowish brown and exhibited characteristic plasmon resonance peak of Ag-NPs at 430 nm. The optical, mechanical, water vapor barrier, thermal stability, and antimicrobial properties of the composite films were greatly influenced by the concentration of Ag-NPs. The composite film with a silver concentration of 1.0 mM demonstrated the highest tensile strength, thermal stability, transparency, and water contact angle with the lowest water vapor permeability (1.36 ± 0.10 × 10−9 g m/m2 Pa s). Also, the composite films incorporated with 1.0 mM of Ag-NPs exhibited a strong antibacterial activity against both Gram-positive (Listeria monocytogenes) and Gram-negative (Escherichia coli) food-borne pathogenic bacteria.