保质期
聚乳酸
食品包装
生物塑料
热稳定性
扫描电子显微镜
差示扫描量热法
材料科学
食品科学
制浆造纸工业
复合材料
化学
废物管理
聚合物
有机化学
物理
工程类
热力学
酶
作者
Wanmei Lin,Jingyao Wang,Mengyi Wang,LI Zhong-hong,Yongsheng Ni,Jianlong Wang
标识
DOI:10.1016/j.foodchem.2023.138002
摘要
Food safety issues and food waste have always been hot topics of concern. This study aimed to develop a recyclable bactericidal packaging film that combines polylactic acid (PLA), graphitic carbon nitride (CN) and carbon nanotubes (CNT) to extend food shelf life. This film exhibited compactness and thermostability, as observed by scanning electron microscope and differential scanning calorimeter. The temperature of P/CN/CNT film could still reach 54 ± 4 °C after being used for 3 times. The film still has bactericidal activity on the 5th cycle use except for L. monocytogenes revealed by morphological characterization on bacteria. This film effectively extended the shelf life of banana to 7 days, as confirmed by measurements of hardness, pH value and total bacterial count of banana. This study provides a packaging film with recyclable bactericidal ability.
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