聚乙烯醇
小虾
淀粉
食品科学
制浆造纸工业
化学
生物技术
高分子科学
生物
渔业
有机化学
工程类
作者
Ying Xu,Kai Wang,Pan Liu,Wei Zheng,Wenya Liu,Zan Yang,Wanqi Jiang,Yibin Zhou,Mingming Zheng,Yaqing Xiao,Yingnan Liu
标识
DOI:10.1016/j.carbpol.2024.122107
摘要
In this study, the polyvinylpyrrolidone-alizarin nanoparticles (PVP-AZ NPs) with favorable water dispersion and the carbon quantum dots (RQDs) with aggregate induced emission effect were synthesized to construct an eco-friendly film for food freshness monitoring. The introduction of PVP-AZ NPs and RQDs enhanced the network structure and thermal stability of the cassava starch/polyvinyl alcohol film, and reduced its crystallinity and light transmittance via non-covalent binding with the film-forming matrix. The developed film exhibited visually recognizable colorimetric and fluorescent responses to ammonia at 0.025–25 mg/mL, and it can be reused at least 6 times. Practical application experiment proved that the film, as an indicator label, can achieve accurate, real-time, and visual dynamic monitoring of the freshness of shrimp stored at 25 °C, 4 °C, and − 20 °C under daylight (orange yellow to purple) and UV light (red to blue). The integration of multivariate detection technology can eliminate the interference of external factors by self-correction to improve sensitivity and reliability, which provides a reference for the development of other food quality and safety monitoring platforms.
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