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Blends of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) with Fruit Pulp Biowaste Derived Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate-co-3-Hydroxyhexanoate) for Organic Recycling Food Packaging

1
Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Spain
2
UCIBIO-REQUIMTE-Applied Molecular Biosciences Unit, Chemistry Department, Faculty of Sciences and Technology, New University of Lisbon, 1099-085 Lisbon, Portugal
3
Polymers and Advanced Materials Group (PIMA), Universitat Jaume I (UJI), 12071 Castellón, Spain
*
Author to whom correspondence should be addressed.
This author is currently with the Research Institute of Food Engineering for Development (IIAD), Universitat Politècnica de València (UPV), Camino de Vera s/n, 46022 Valencia, Spain; [email protected]
Academic Editor: Justyna Możejko-Ciesielska
Polymers 2021, 13(7), 1155; https://doi.org/10.3390/polym13071155
Received: 13 March 2021 / Revised: 25 March 2021 / Accepted: 26 March 2021 / Published: 4 April 2021
In the present study, a new poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxyhexanoate) [P(3HB-co-3HV-co-3HHx)] terpolyester with approximately 68 mol% of 3-hydroxybutyrate (3HB), 17 mol% of 3-hydroxyvalerate (3HV), and 15 mol% of 3-hydroxyhexanoate (3HHx) was obtained via the mixed microbial culture (MMC) technology using fruit pulps as feedstock, a processing by-product of the juice industry. After extraction and purification performed in a single step, the P(3HB-co-3HV-co-3HHx) powder was melt-mixed, for the first time, in contents of 10, 25, and 50 wt% with commercial poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). Thereafter, the resultant doughs were thermo-compressed to obtain highly miscible films with good optical properties, which can be of interest in rigid and semirigid organic recyclable food packaging applications. The results showed that the developed blends exhibited a progressively lower melting enthalpy with increasing the incorporation of P(3HB-co-3HV-co-3HHx), but retained the PHB crystalline morphology, albeit with an inferred lower crystalline density. Moreover, all the melt-mixed blends were thermally stable up to nearly 240 °C. As the content of terpolymer increased in the blends, the mechanical response of their films showed a brittle-to-ductile transition. On the other hand, the permeabilities to water vapor, oxygen, and, more notably, limonene were seen to increase. On the overall, this study demonstrates the value of using industrial biowaste derived P(3HB-co-3HV-co-3HHx) terpolyesters as potentially cost-effective and sustainable plasticizing additives to balance the physical properties of organic recyclable polyhydroxyalkanoate (PHA)-based food packaging materials. View Full-Text
Keywords: polyhydroxyalkanoates; waste valorization; food packaging; Circular Bioeconomy; organic recycling polyhydroxyalkanoates; waste valorization; food packaging; Circular Bioeconomy; organic recycling
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MDPI and ACS Style

Meléndez-Rodríguez, B.; Torres-Giner, S.; Reis, M.A.M.; Silva, F.; Matos, M.; Cabedo, L.; Lagarón, J.M. Blends of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) with Fruit Pulp Biowaste Derived Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate-co-3-Hydroxyhexanoate) for Organic Recycling Food Packaging. Polymers 2021, 13, 1155. https://doi.org/10.3390/polym13071155

AMA Style

Meléndez-Rodríguez B, Torres-Giner S, Reis MAM, Silva F, Matos M, Cabedo L, Lagarón JM. Blends of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) with Fruit Pulp Biowaste Derived Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate-co-3-Hydroxyhexanoate) for Organic Recycling Food Packaging. Polymers. 2021; 13(7):1155. https://doi.org/10.3390/polym13071155

Chicago/Turabian Style

Meléndez-Rodríguez, Beatriz, Sergio Torres-Giner, Maria A.M. Reis, Fernando Silva, Mariana Matos, Luis Cabedo, and José M. Lagarón. 2021. "Blends of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) with Fruit Pulp Biowaste Derived Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate-co-3-Hydroxyhexanoate) for Organic Recycling Food Packaging" Polymers 13, no. 7: 1155. https://doi.org/10.3390/polym13071155

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