Zein-Curcumin Composite Edible Films for Intelligent Packaging: A Natural pH-Sensing Indicator to Monitor Sea Bream Freshness

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dc.authorid0000-0002-9360-3446
dc.authorid0000-0003-1173-5793
dc.authorid0000-0002-4732-7727
dc.authorid0009-0009-5315-3055
dc.authorid0000-0003-0718-5450
dc.authorid0000-0003-2084-7076
dc.authorid0000-0003-0665-8041
dc.contributor.authorDemirtas, Burcu
dc.contributor.authorKeser, Beyza
dc.contributor.authorTural, Serpil
dc.contributor.authorGul, Latife Betul
dc.contributor.authorYilmaz, Ilay
dc.contributor.authorParlak, Mahmut Ekrem
dc.contributor.authorSaricaoglu, Furkan Turker
dc.date.accessioned2026-02-08T15:15:56Z
dc.date.available2026-02-08T15:15:56Z
dc.date.issued2025
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractThis study developed and characterized zein-based edible films enriched with curcumin as natural pH-sensitive indicators for monitoring fish freshness. Colorimetric films were prepared with different curcumin concentrations (1-7% wt) and evaluated for physicochemical, mechanical, optical, and antioxidant properties. Increasing curcumin content reduced water vapor permeability (0.085-0.110 gmm/m(2)hkPa), lowered water contact angles (<90 degrees), and enhanced hydrophilicity. Films exhibited high brightness, with decreased a* and increased b* values, while light transmission decreased, improving UV barrier properties. Colorimetric response (Delta E*) across pH 3-10 was more pronounced at higher curcumin levels, confirming pH-sensitivity. Antioxidant activity significantly increased with curcumin loading (up to 24.18 mol Trolox/g). Mechanical analysis revealed decreased tensile strength but improved elongation at break, bursting strength, and deformation, supported by SEM images showing more homogeneous, micro-porous structures at 7% curcumin. Zein films containing 7% (wt) curcumin (Z/CR7) were applied to gilthead sea bream (Sparus aurata) fillets stored at 4 degrees C for 13 days. Results showed lower TBARS and TVB-N values in Z/CR7 compared to the control, indicating delayed lipid oxidation and spoilage. Colorimetric changes in the films corresponded with fish freshness deterioration, providing a clear visual indicator. Microbiological results supported chemical findings, though antimicrobial effects were limited. Curcumin-enriched zein films demonstrated strong potential as intelligent, biodegradable packaging for real-time monitoring of seafood quality.
dc.description.sponsorshipItalian Ministry of University and Research [D43C22001260001]; TBIdot;TAK 2209/A University Undergraduate Students Research Projects Support Program [1919B012208810(2209)]; European Union-NextGenerationEU [CN_00000033]
dc.description.sponsorshipThis study was supported within the scope of the TUB & Idot;TAK 2209/A University Undergraduate Students Research Projects Support Program, project number 1919B012208810(2209). Project also funded under the National Recovery and Resilience Plan (NRRP), Mission 4 Component 2 Investment 1.4-Call for tender No. 3138 of 16 December 2021, rectified by Decree n.3175 of 18 December 2021 of Italian Ministry of University and Research funded by the European Union-NextGenerationEU; Award Number: Project code CN_00000033, Concession Decree No. 1034 of 17 June 2022 adopted by the Italian Ministry of University and Research, CUP: D43C22001260001, Project title National Biodiversity Future Center-NBFC.
dc.identifier.doi10.3390/foods14223846
dc.identifier.issn2304-8158
dc.identifier.issue22
dc.identifier.pmid41300004
dc.identifier.scopus2-s2.0-105022877162
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.3390/foods14223846
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6055
dc.identifier.volume14
dc.identifier.wosWOS:001625907900001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherMdpi
dc.relation.ispartofFoods
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzWOS_KA_20260207
dc.subjectcurcumin
dc.subjectzein
dc.subjectedible films
dc.subjectpH indicator
dc.subjectintelligent packaging
dc.subjectfish freshness
dc.titleZein-Curcumin Composite Edible Films for Intelligent Packaging: A Natural pH-Sensing Indicator to Monitor Sea Bream Freshness
dc.typeArticle

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