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Polylactide films produced with bixin and acetyl tributyl citrate: Functional properties for active packaging

Abstract : Packaging materials are decisive to preserve the quality and nutritional value of food. Polylactide (PLA) is a biodegradable polymer with adequate mechanical properties for packaging applications, but its moderate oxygen barrier properties and high UV light transmission hamper its performance as packaging for oxygen-and light-sensitive products. Bixin, a carotenoid with coloring and antioxidant character, was used to improve the light barrier of PLA films plasticized or not with acetyl tri-butyl citrate (ATBC). The films were subjected to thermal treatment mimicking polymer processing temperatures. Despite more than 74 wt% of bixin degraded during heat treatment, films were still blocking up to 95% of UVA and 90% of UVB transmission. Plasticizing PLA with ATBC accelerated up to six times the bixin release into a food simulant, which allowed to reach relevant concentrations for food preservation. In conclusion, bixin is a promising natural antioxidant and UV-shielding additive of biodegradable packaging.
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https://hal-agroparistech.archives-ouvertes.fr/hal-03413495
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Submitted on : Wednesday, November 3, 2021 - 6:37:46 PM
Last modification on : Friday, December 3, 2021 - 10:41:31 AM

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Liana Stoll, Sandra Domenek, Simone Hickmann Flôres, Sonia Marli B. Nachtigall, Alessandro de Oliveira Rios. Polylactide films produced with bixin and acetyl tributyl citrate: Functional properties for active packaging. Journal of Applied Polymer Science, Wiley, 2021, 138 (17), pp.50302. ⟨10.1002/app.50302⟩. ⟨hal-03413495⟩

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