A biopolymer film for visual fish freshness monitoring was developed using pH-sensitive Hibiscus sabdariffa extract in an agar-silk fibroin matrix. The anthocyanin-rich extract changes color with fish spoilage pH and exhibits antioxidant activity. Pure agar films are too moisture-sensitive, but adding silk fibroin reduced swelling and improved mechanical stability for wet conditions. This composite offers a sustainable, biodegradable platform for real-time, visual quality assessment of fish.

Баринова В.В., Трейси Ш. (науч. рук. Назарова Е.А.) Development of a ph-responsive biopolymer film based on silk fibroin and hibiscus sabdariffa extract for smart food packaging // Сборник тезисов докладов конгресса молодых ученых. Электронное издание. – СПб: Университет ИТМО, [2026]. URL: https://kmu.itmo.ru/digests/article/17558