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High-Performance, Degradable, Self-Healing Bio-Based Nanocomposite Coatings with Antibacterial and Antioxidant Properties

文献类型： 外文期刊

作者： Zhang, Qiang 1 ; Bu, Qihang 1 ; Xia, Jiangyue 2 ; Sun, Rongxue 2 ; Li, Dajing 2 ; Luo, Haibo 1 ; Jiang, Ning 2 ; Wang, Cheng 2 ;

作者机构： 1.Nanjing Normal Univ, Sch Food & Pharmaceut Engn, Nanjing 210023, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Prod Proc, Nanjing 210014, Peoples R China

3.Storage & Proc Technol Aquat Prod Minist Agr & Rur, Integrated Sci Res Base Preservat, Nanjing 210014, Peoples R China

关键词： nanocomposite coating; self-healing; antioxidant; antibacterial

期刊名称：NANOMATERIALS （ 影响因子：5.3； 五年影响因子：5.4 ）

ISSN：

年卷期： 2023 年 13 卷 7 期

页码：

收录情况： SCI

摘要： The purpose of this study is to obtain a bio-based coating with good functional activity and self-healing ability, demonstrating its potential in food, materials, and other application fields. Plastic coatings can cause serious environmental pollution. It was a good solution to replace plastic coatings with degradable coatings. However, the development of degradable coatings in the fields of food and materials was limited due to their insufficient antibacterial ability and weak comprehensive properties. Therefore, chitosan nanoparticles (NPs) loaded with gallic acid (GA) were self-assembled with gelatin (GE) to prepare high-performance, degradable, self-healing bio-based nanocomposite coatings with antibacterial and antioxidant properties. The oxygen permeability of GE nanocomposite coatings decreased gradually with the addition of NPs, and the barrier properties increased significantly. At the same time, due to the excellent antioxidant and antibacterial ability of GA, the antioxidant effect of the nanocomposite coatings increased by 119%, and the antibacterial rate against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) increased by 32% and 58%, respectively, compared with the pure GE coatings. In addition, the nanocomposite coatings can be repaired within 24 h after being scratched at room temperature. Finally, GA coated with chitosan nanoparticles can significantly delay the escape of GA, and the retardation of gallic acid release exceeded 89% in simulated solutions after 24 h immersion, extending the service life of the nanocomposite coatings.

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