2026-04-27T13:46:01Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/730592025-01-12T19:24:44Zcom_10324_1158com_10324_931com_10324_894col_10324_1242

Quilez Molina, Ana Isabel Merino, Danila Dumon, Michel 2025-01-07T09:12:58Z 2025-01-07T09:12:58Z 2024 Food Hydrocolloids, septiembre 2024, vol. 154, 110114 0268-005X https://uvadoc.uva.es/handle/10324/73059 10.1016/j.foodhyd.2024.110114 110114 Food Hydrocolloids 154 Producción Científica In line with the growing demand for more sustainable and efficient materials for food packaging, new bifunctional pH-responsive composites were developed with the dual purpose of packaging and indicating seafood spoilage. Within this study, a fully bio-based composite based on porous starch (PS) was prepared via microwave irradiation ( 1 g/cm3) followed by functionalization via dip-coating with an active solution of anthocyanins-carboxymethyl cellulose (CMC). Here, the edible anthocyanins (Ath) endowed excellent antioxidant and pH-sensing properties to the resulting bifunctional composite (PS-ACMC), covering a pH range of 6–11.5, making it compelling for developing smart food-packaging materials. Moreover, results indicated that the coating scarcely altered the excellent mechanical properties developed by the PS sample, which were comparable with the commercial expanded polystyrene foams. Concurrently, to enhance the competitive properties of the starch component, bifunctional PS-CMC systems were devised crosslinking starch with citric acid. The obtained citrate-starch specimens exhibited a superior porous structure with lower density ( 0.61 g/cm3), antioxidant properties, and about 40% less solubility in water compared to the neat starch sample. Remarkably, this functionalization hindered the colour-switching properties when the active coating was added, likely due to a strong fixation of the CMC with the natural dye. However, PS-ACMC composites exhibited a rapid and effective colour response, transitioning from violet to greenish-blue, facilitating visual and real-time assessment of the freshness when using shrimp as test specimens. The results reported underscored the high potential of such bifunctional biocomposites in obtaining sustainable and smart freshness-monitoring packaging for seafood. application/pdf eng Elsevier info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © 2024 The Authors Attribution-NonCommercial-NoDerivatives 4.0 Internacional Food-freshness indicator Smart food-packaging Functionalized-starch Carboxymethyl cellulose Active coating 3309.13 Conservación de Alimentos Porous starch embedded with anthocyanins-CMC coating as bifunctional packaging with seafood freshness monitoring properties info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S0268005X24003886 SI