Smart colorimetric indicator films prepared from chitosan and polyvinyl alcohol with high mechanical strength and hydrophobic properties for monitoring shrimp freshness

被引:17
|
作者
Khan, Jehangir [1 ]
An, Haoyue [1 ]
Alam, Shah [2 ]
Kalsoom, Saima [3 ]
Chen, Shu Huan [1 ]
Begeno, Teshale Ayano [1 ]
Du, Zhenxia [1 ]
机构
[1] Beijing Univ Chem Technol, Coll Chem, Beijing 100029, Peoples R China
[2] PMAS Arid Agr Univ, Dept Entomol, Rawalpindi, Pakistan
[3] PMAS Arid Agr Univ, Dept Chem, Rawalpindi, Pakistan
关键词
Chitosan; Polyvinyl alcohol; Shikonin; Smart packaging film; Water vapor permeability; Water contact angle; PH-SENSITIVE FILMS; RED CABBAGE; ELECTRICAL-PROPERTIES; CASSAVA STARCH; SEED COAT; CELLULOSE; ANTHOCYANINS; COMPOSITE; ANTIOXIDANT; EXTRACTS;
D O I
10.1016/j.foodchem.2024.138784
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
This work aimed to develop and characterize a colorimetric indicator films based on chitosan (CS), polyvinyl alcohol (PVA), and shikonin (SKN) from radix Lithospermi by casting method. The prepared films can serve as smart packaging for monitoring shrimp freshness which having excellent antimicrobial and antioxidant activity. The shikonin containing films have better hydrophobicity, barrier properties, and tensile strength. The release kinetics analysis shows that the loading amount causes a prolonged release of SKN from the prepared films. Increasing SKN in the CS/PVA film from 1 wt% to 2 wt% improved antibacterial effect for 24 h. Additionally, pHsensitive color shifts from reddish (pH 2) to purple -bluish (pH 13) were visually seen in shikonin based solutions as well as films. The CS/PVA/SKN film detected shrimp deterioration at three temperatures (25, -20, and 4 C-degrees) through color change. This study introduces a favorable approach for smart packaging in the food industry using multifunctional films.
引用
收藏
页数:12
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