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Biosynthesis and Characterization of AgNPs–Silk/PVA Film for Potential Packaging Application

机译：AgNPs-Silk / PVA薄膜的生物合成和表征，可用于潜在包装

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Bionanocomposite packaging materials have a bright future for a broad range of applications in the food and biomedical industries. Antimicrobial packaging is one of the bionanocomposite packaging materials. Silver nanoparticle (AgNP) is one of the most attractive antimicrobial agents for its broad spectrum of antimicrobial activity against microorganisms. However, the traditional method of preparing AgNPs-functionalized packaging material is cumbersome and not environmentally friendly. To develop an efficient and convenient biosynthesis method to prepare AgNPs-modified bionanocomposite material for packaging applications, we synthesized AgNPs in situ in a silk fibroin solution via the reduction of Ag + by the tyrosine residue of fibroin, and then prepared AgNPs–silk/poly(vinyl alcohol) (PVA) composite film by blending with PVA. AgNPs were synthesized evenly on the surface or embedded in the interior of silk/PVA film. The prepared AgNPs–silk/PVA film exhibited excellent mechanical performance and stability, as well as good antibacterial activity against both Gram-negative and Gram-positive bacteria. AgNPs–silk/PVA film offers more choices to be potentially applied in the active packaging field.
机译：Bionanocomposite包装材料在食品和生物医学行业的广泛应用中具有广阔的前景。抗菌包装是生物纳米复合包装材料之一。银纳米颗粒（AgNP）是最吸引人的抗菌剂之一，因为它具有广泛的针对微生物的抗菌活性。然而，制备AgNPs功能化包装材料的传统方法麻烦且不环保。为了开发一种高效便捷的生物合成方法来制备用于包装的AgNPs改性的仿生复合材料，我们通过在丝素蛋白溶液中通过纤维蛋白的酪氨酸残基还原Ag +来原位合成AgNPs，然后制备了AgNPs–silk / poly （乙烯醇）（PVA）复合膜，可与PVA混合。 AgNPs在丝绸/ PVA薄膜的表面上均匀合成或嵌入其中。制备的AgNPs-silk / PVA薄膜具有出色的机械性能和稳定性，并且对革兰氏阴性菌和革兰氏阳性菌均具有良好的抗菌活性。 AgNPs丝/ PVA薄膜提供了更多选择，可在主动包装领域中应用。

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