Preparation and characterization of intelligent starch/PVA films for simultaneous colorimetric indication and antimicrobial activity for food packaging applications

被引：195
作者：
Liu, Bin [1 ,2 ]
Xu, Han [1 ,2 ]
Zhao, Huiying [2 ]
Liu, Wei [2 ]
Zhao, Liyun [1 ]
Li, Yuan [1 ]
机构：
[1] China Agr Univ, Coll Food Sci & Nutr Engn, Key Lab Funct Dairy, Beijing Adv Innovat Ctr Food Nutr & Human Hlth, Beijing 100083, Peoples R China
[2] Beijing Univ Chem Technol, Coll Life Sci & Technol, Beijing 100029, Peoples R China
来源：
CARBOHYDRATE POLYMERS | 2017年 / 157卷
基金：
中国国家自然科学基金;
关键词：
Intelligent food packaging; Starch/PVA films; Colorimetric indication; Antimicrobial packaging; Real-time quality monitoring; ESSENTIAL OILS; STAPHYLOCOCCUS-AUREUS; ANTHOCYANINS; NANOCOMPOSITES; MEMBRANES; PRODUCTS; BACTERIA;
D O I：
10.1016/j.carbpol.2016.10.067
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
We have developed an intelligent starch/poly-vinyl alcohol (PVA) film that is capable of monitoring pH changes and inhibiting undesired microbial growth in foods. Starch and PVA polymers in the film were doubly cross-linked by sodium trimetaphosphate and boric acid to improve their water-resistance and mechanical strength. Anthocyanins (ANT) and limonene (LIM) were used to achieve simultaneous colorimetric indication and antimicrobial activity. Firstly, the characterization of surface morphology using SEM confirmed that the starch-PVA-ANT-LIM film possessed a smooth surface. Secondly, the results of the mechanical strength test showed that starch-PVA-ANT-LIM possesses the highest mechanical strength. Additionally, there was a distinguishable change of colors as the film was immersed in solutions of pH ranging from 1.0 to 14.0. Moreover, the film showed excellent antimicrobial activity for three typical undesired microorganisms in foods, Bacillus subtilis, Aspergillus niger, and Staphylococcus aureus. Finally, the film exhibited good color indication and antimicrobial activity on pasteurized milk. The results suggest that the intelligent film reported here shows good capability for both alerting and inhibiting food spoilage. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：842 / 849
页数：8
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