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In a previous study, it was demonstrated that anthocyanins could be stabilized into green plasticizers namely deep eutectic solvents (DESs). In this work, the fabrication of edible films by integrating anthocyanins along with DESs into biocompatible chitosan (CHT)-based formulations enriched with polyvinyl alcohol (PVA) and PVA nanoparticles was investigated. CHT\/PVA-DES films\u2019 physical properties were characterized by scanning electron microscopy, water vapor permeability, swelling index, moisture sorption isotherm, and thermogravimetry analysis. Innovative red-to-blue formulation films were achieved for CHT\/PVA nanoparticles (for 5 min of sonication) at a molar ratio 1:1, and with 10% of ternary DES (TDES)-containing malvidin-3-glucoside (0.1%) where the physical properties of films were enhanced. After immersion in solutions at different pH values, films submitted to pHs 5\u20138 were revealed to be more color stable and resistant with time than at acidic pH values.<\/jats:p>","DOI":"10.3390\/ijms25116154","type":"journal-article","created":{"date-parts":[[2024,6,3]],"date-time":"2024-06-03T10:08:38Z","timestamp":1717409318000},"page":"6154","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Chitosan\/Polyvinyl Alcohol-Based Biofilms Using Ternary Deep Eutectic Solvents towards Innovative Color-Stabilizing Systems for Anthocyanins"],"prefix":"10.3390","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2619-6892","authenticated-orcid":false,"given":"Hil\u00e9ia K. S.","family":"de Souza","sequence":"first","affiliation":[{"name":"REQUIMTE\/LAQV, Chemistry and Biochemistry Department, Faculdade de Ci\u00eancias, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal"},{"name":"PIEP\u2014P\u00f3lo de Inova\u00e7\u00e3o em Engenharia de Pol\u00edmeros, Universidade do Minho, Campus de Azur\u00e9m, Edif\u00edcio 15, 4800-058 Guimar\u00e3es, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6196-4899","authenticated-orcid":false,"given":"Marta","family":"Guimar\u00e3es","sequence":"additional","affiliation":[{"name":"REQUIMTE\/LAQV, Chemistry and Biochemistry Department, Faculdade de Ci\u00eancias, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9318-9732","authenticated-orcid":false,"given":"Nuno","family":"Mateus","sequence":"additional","affiliation":[{"name":"REQUIMTE\/LAQV, Chemistry and Biochemistry Department, Faculdade de Ci\u00eancias, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal"}]},{"given":"Victor","family":"de Freitas","sequence":"additional","affiliation":[{"name":"REQUIMTE\/LAQV, Chemistry and Biochemistry Department, Faculdade de Ci\u00eancias, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2226-0404","authenticated-orcid":false,"given":"Lu\u00eds","family":"Cruz","sequence":"additional","affiliation":[{"name":"REQUIMTE\/LAQV, Chemistry and Biochemistry Department, Faculdade de Ci\u00eancias, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2024,6,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1416","DOI":"10.1021\/acs.chemrev.1c00399","article-title":"Natural and Synthetic Flavylium-Based Dyes: The Chemistry Behind the Color","volume":"122","author":"Cruz","year":"2022","journal-title":"Chem. 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