A Fluorescent Polyvinyl Alcohol Film with Efficient Photodynamic Antimicrobial Performance Enabled by Berberine/Phytic Acid Salt for Food Preservation

聚乙烯醇 材料科学 盐(化学) 植酸 抗菌剂 荧光 小檗碱 核化学 纳米技术 有机化学 食品科学 化学 光学 复合材料 物理
作者
Yuping Ning,Wen Yang,Shuaimin Liu,Jin Xu,Xiling Cheng,Shiyu Xu,Jian Li,Lijuan Wang
出处
期刊:Advanced Functional Materials [Wiley]
被引量:9
标识
DOI:10.1002/adfm.202411314
摘要

Abstract Food packaging that impedes microbial growth and can be safely used is critical to attenuate food spoilage. Herein, a green berberine/phytate salt (BPA) is successfully synthesized and aggregated in polyvinyl alcohol (PVA) film to impart fluorescent and photodynamic antimicrobial properties. Compared to berberine hydrochloride (BHL), BPA exhibited stronger fluorescence because intramolecular motions and intermolecular π–π accumulation of BHL are restricted by phytic acid (PA). Molecular dynamics simulation indicate that aggregation of BHL and PA formed through electrostatic interactions in the PVA matrix due to the change of the binding energy during the drying process. With increasing BPA content, the films exhibited increased ultraviolet, water vapor, and oxygen barriers and fluorescent properties, but reduced tensile strength and elongation at break. After radiated, PVA‐BPA 9 film showed the highest antimicrobial rates against Staphylococcus aureus , Escherichia coli, P. citrinum , and Aspergillus niger reached 100%, 100%, 86.14%, and 66.24%, respectively, due to the increased reactive oxygen species production. The total number of microbial colonies in cooked chicken and oranges packaged by PVA‐BPA 9 film with irradiation ARE 87.54% and 29.21% of those by PVA film. The findings indicate a new and feasible strategy to obtain a green photodynamic‐mediated film for safe and effective food packaging.
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