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Antibacterial castor oil-based waterborne polyurethane/gelatin films for packaging of strawberries

文献类型： 外文期刊

作者： Zhong, Yuye 1 ; Zhang, Tao 1 ; Zhang, Wenshuo 1 ; Wang, Guannan 2 ; Zhang, Zhenhong 1 ; Zhao, Pingping 1 ; Liu, Xinghai 1 ; Li, Houbin 1 ;

作者机构： 1.Wuhan Univ, Res Ctr Commun Graph Printing & Packaging, Wuhan 430079, Peoples R China

2.Zhejiang Acad Agr Sci, Food Sci Inst, Hangzhou 310021, Peoples R China

关键词： Gelatin; Castor oil-based waterborne polyurethane; Antibacterial property; Quaternary ammonium salt; Food packaging

期刊名称：FOOD PACKAGING AND SHELF LIFE （ 影响因子：8.0； 五年影响因子：8.1 ）

ISSN： 2214-2894

年卷期： 2023 年 36 卷

页码：

收录情况： SCI

摘要： Gelatin films for food packaging have gained popularity due to their affordability, strong renewability, and high biodegradability. However, pure gelatin film has poor stretch ability, moisture-sensitive, and no antibacterial properties, which limits its use in food industry. In this work, we effectively grafted quaternary ammonium groups onto a novel castor oil-based waterborne polyurethane (CWU). Gelatin was mixed with carious con-centrations of CWU to create composite films. The mechanical properties, thermal stability, water permeability and oxygen permeability of these composite films improved dramatically with the increase of CWU concentra-tion. The composite films demonstrated good inhibitory effect on Escherichia coli and Staphylococcus aureus due to the antibacterial capabilities of quaternary ammonium compound. The shelf life of the strawberry packaged in the composite film is extended to more than 6 days. Therefore, the new CWU mixed with gelatin could serve as an alternative food packaging material.

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