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    High-sensitivity intelligent packaging films harnessing rose anthocyanins and hydrophilic silica aerogel for visual food freshness monitoring
    (Oxford Univ Press, 2024) Wu, Wenjun; Zheng, Luman; Yu, Jiahao; Liu, Liming; Goksen, Gulden; Shao, Ping
    The enhancement of the sensitivity for anthocyanin-based indicator films in food freshness monitoring in real time is important for application. In this study, hydrophilic silica aerogel (SiO2NA) was incorporated into corn starch (CS)/chitosan (CH)/rose anthocyanins (RACNs)-encapsulated potato amylopectin nanoparticles (APNPs) composite film to increase the sensitivity for shrimp freshness detection. The microstructure of films revealed that the gas absorption capacity was improved by amorphous SiO2NA via hydrogen interactions. The pore size (1.74-5.60 times), pore volume (3.92-5.60 times), and specific surface area (2.21-2.34 times) of films increased with the addition of SiO2NA. The sensing of NH3 and pH and the reversibility of films were also reinforced. Meanwhile, the pH-responsive films containing SiO2NA changed visibly in color from purple-red to orange-gray and finally to gray, enabling effective monitoring of shrimp freshness during storage at 4 degrees C. Thus, anthocyanin-based indicator films with improved sensitivity by adding SiO2NA were successfully designed for monitoring shrimp freshness.
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    Multidimensional (0D-3D) nanofillers: Fascinating materials in the field of bio-based food active packaging
    (Elsevier, 2022) Wu, Weina; Liu, Liming; Goksen, Gulden; Demir, Didem; Shao, Ping
    Nanoscience paves the new way for the development of bio-based food packaging. Recently, research on bionanocomposite packaging has gained momentum, driven by consumers' pursuits of food quality and the reduction of resource waste. This is mainly attributable to its excellent biogradability, non-toxicity, consumer friendliness and its potential for functional properties that contribute to extending the shelf life of foods. Bionanocomposite packaging materials can be prepared by incorporating nano-sized additives into biopolymeric matrices. The review investigates how dimensional qualities of nanofillers affect functional properties, rather than just the biopolymer matrix as a whole. The features of various nanofillers were first introduced in this review. As a result, the functional variations amongst nanofillers of different dimensions were emphasized. After that, some concrete applications, the main obstacles and solutions were discussed in detail. Finally, a clear perspective and prospect for the future manufacturing and research directions of biological nanocomposites prepared for active packaging were presented.