Exopolysaccharide riclin and anthocyanin-based composite colorimetric indicator film for food freshness monitoring

Food freshness monitoring is vital to ensure food safety. Recently, packaging materials incorporating pH-sensitive films have been employed to monitor the freshness of food products in real time. The film-forming matrix of the pH-sensitive film is essential to maintain the desired physicochemical fu...

Full description

Saved in:
Bibliographic Details
Published in:Carbohydrate polymers 2023-08, Vol.314, p.120882-120882, Article 120882
Main Authors: Miao, Yaqiong, Chen, Zenghui, Zhang, Jinrun, Li, Nan, Wei, Zhenxuan, Zhang, Yan, Wu, Xinyi, Liu, Junhao, Gao, Qin, Sun, Xiaqing, Sun, Qi, Zhang, Jianfa
Format: Article
Language:English
Subjects:
ammonia
Ammonia-sensitive
anthocyanins
Anthocyanins - chemistry
Antioxidant activity
Barrier property
biodegradability
color
Colorimetry
Exopolysaccharide riclin
exopolysaccharides
Food Packaging
food safety
freshness
hydrogen
Hydrogen-Ion Concentration
Intelligent food packaging
Mechanical property
monitoring
Plant Extracts - chemistry
polyvinyl alcohol
Polyvinyl Alcohol - chemistry
shrimp
sweet potatoes
tensile strength
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Food freshness monitoring is vital to ensure food safety. Recently, packaging materials incorporating pH-sensitive films have been employed to monitor the freshness of food products in real time. The film-forming matrix of the pH-sensitive film is essential to maintain the desired physicochemical functions of the packaging. Conventional film-forming matrices, such as polyvinyl alcohol (PVA), have drawbacks of low water resistance, poor mechanical properties, and weak antioxidant ability. In this study, we successfully synthesise PVA/riclin (P/R) biodegradable polymer films to overcome these limitations. The films feature riclin, an agrobacterium-derived exopolysaccharide. The uniformly dispersed riclin conferred outstanding antioxidant activity to the PVA film and significantly improved its tensile strength and barrier properties by forming hydrogen bonds. Purple sweet potato anthocyanin (PSPA) was used as a pH indicator. The intelligent film with added PSPA provided robust surveillance of volatile ammonia and changed its color within 30 s in the pH range of 2–12. This multifunctional colorimetric film also engendered discernible color changes when the quality of shrimp deteriorated, demonstrating its great potential as an intelligent packaging material to monitor food freshness. [Display omitted]
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2023.120882