Abstract An environmentally friendly method has been proposed to synthesize silver nanoparticles using polyvinyl alcohol (PVA)-cinnamaldehyde (CIN) microemulsion. Ternary composite films with different concentration of Ag-NPs were prepared by solution casting method. The formation of Ag-NPs was confirmed by measuring surface plasmon resonance (SPR) peak. The SPR peak of Ag-NPs did not change after three months later, suggesting that the Ag-NPs stability without aggregation. Scanning electron microscopy (SEM) demonstrated that the Ag-NPs were uniformly dispersed in the film. The tensile strength and water vapor transmission rate of the composite film enhanced (p < 0.05) with the proportion of nano-silver increased, whereas the elongation at break unchanged. The composite film exhibited a strong antibacterial activity against both E. coli and S. aureu food-borne pathogenic bacteria. These finding suggest that the nano-silver sol obtained by PVA-CINmicroemulsion can be effectively utilized to prepare antibacterial eco-friendly food packaging material.

中文翻译：

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肉桂醛/聚乙烯醇/纳米银三元复合薄膜的制备与表征

摘要 提出了一种使用聚乙烯醇（PVA）-肉桂醛（CIN）微乳液合成银纳米粒子的环保方法。采用溶液浇铸法制备了不同浓度Ag-NPs的三元复合薄膜。通过测量表面等离子体共振 (SPR) 峰确认了 Ag-NPs 的形成。Ag-NPs 的 SPR 峰值在三个月后没有变化，表明 Ag-NPs 稳定而没有聚集。扫描电子显微镜 (SEM) 表明 Ag-NPs 均匀分散在薄膜中。随着纳米银比例的增加，复合薄膜的拉伸强度和水蒸气透过率提高（p < 0.05），而断裂伸长率不变。该复合膜对大肠杆菌和金黄色葡萄球菌均表现出很强的抗菌活性。aureu 食源性致病菌。这些发现表明，PVA-CIN微乳得到的纳米银溶胶可以有效地用于制备抗菌环保的食品包装材料。