Biodegradable films functionalized with Moringa oleifera applied in food packaging
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ORIGINAL RESEARCH
Biodegradable films functionalized with Moringa oleifera applied in food packaging Adriana Gomes Verdi1 · Alana Gabrieli de Souza1 · Daniel Belchior Rocha1 · Sueli Aparecida de Oliveira1 · Rosa Maria Vercelino Alves2 · Derval dos Santos Rosa1 Received: 1 June 2020 / Accepted: 10 November 2020 © Iran Polymer and Petrochemical Institute 2020
Abstract Biodegradable polymers are a suitable alternative for replacing traditional food packaging with environmental concerns. Poly(butylene adipate-co-terephthalate) (PBAT) is a synthetic biodegradable polymer with high flexibility and a high potential for functionalization, aiming at bactericidal, antimicrobial, or antifungal properties. In this work, the casting method was used to prepare PBAT films containing Moringa oleifera (MO) seed powder. The MO was added in different contents of 0, 1, 3, 5, and 10% (wt) to functionalize the film properties and its efficiency as strawberry packaging. The PBAT films containing 1% (wt) of MO were the most suitable for packaging applications, considering the mechanical properties and thermal properties. MO did not present significant interactions with the PBAT matrix and reduced the PBAT crystallinity, leading to a decrease in gas and water vapor permeabilities. The PBAT-1% MO films showed good performance as biodegradable packaging for strawberry storage, prolonging their storage time and reducing their vulnerability to fungal attack. Besides, the MO decreased the fungal contamination of strawberries when compared to those stored in neat PBAT. The developed films performance suggests that the PBAT/MO films have good potential to be used as active food packaging. Keywords Packaging · Moringa oleifera · Strawberry · Active films · PBAT
Introduction Packaging plays a fundamental role in the storage, transportation, and maintenance of food quality. Fresh foods, such as fruits and vegetables, are known for their short shelf life, resulting in high losses in relatively short times (~ 10 days) [1]. Among the primary packaging used by the food industry, commodity polymers are mainly used, with a production of 360 million tons worldwide every year [2]. The basic Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13726-020-00885-7) contains supplementary material, which is available to authorized users. * Derval dos Santos Rosa [email protected]; [email protected] 1
Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas-CECS/Universidade Federal Do ABC (UFABC)Santo André, Avenida Dos Estados, 5001, Santo André, SP 09210‑580, Brazil
Packaging Technology Center-Instituto de Tecnologia de Alimentos-Cetea/Ital-Campinas, Avenida Brasil 2880, Campinas, SP 13070‑178, Brazil
2
polymers used for packaging are polyethylene, polypropylene, polyvinyl chloride, polystyrene, and polyethylene terephthalate. Despite being low-density and low-cost materials, these polymers present significant ecological issues for their disposal due to their high degradation time
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