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Ammonia-responsive colorimetric film of phytochemical formulation (alizarin) grafted onto ZIF-8 carrier with poly (vinyl alcohol) and sodium alginate for beef freshness monitoring
• 2024
Publication Information
Authors
Jianing Zhang, Junjun Zhang, Xinai Zhang, Xiaowei Huang, Jiyong Shi, Remah Sobhy, Ibrahim Khalifa, Xiaobo Zou
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publication.type
International
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Supplementary Materials
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Abstract
In this study, we devised a photothermally stable phytochemical dye by leveraging alizarin in conjunction with the metal–organic framework ZIF-8 (AL@ZIF-8). The approach involved grafting alizarin into the microporous structure of ZIF-8 through physical adsorption and hydrogen-bonding interactions. AL@ZIF-8 significantly enhanced the photostability and thermostability of alizarin. The nanoparticles demonstrate substantial color changes in various pH environments, showcasing their potential for meat freshness monitoring. Furthermore, we introduced an intelligent film utilizing poly(vinyl alcohol)-sodium alginate-AL@ZIF-8 (PA-SA-ZA) for detecting beef freshness. The sensor exhibited a superior water contact angle (52.34°) compared to the alizarin indicator. The color stability of the film was significantly enhanced under visible and UV light (ΔE < 5). During beef storage, the film displayed significant color …