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Open AccessArticle

Synthesis of Polylactic Acid Initiated through Biobased Antioxidants: Towards Intrinsically Active Food Packaging

1
Department of Chemistry, University of Milan, Via Golgi 19, 20133 Milan, Italy
2
CRC Materiali Polimerici (LaMPo), Department of Chemistry, University of Milan, Via Golgi 19, 20133 Milan, Italy
3
IRTA, Food Technology, Finca Camps i Amet s/n, 17121 Monells, Spain
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DeFENS, Department of Food, Environmental and Nutritional Sciences-PackLab–University of Milan, Via Celoria 2, 20133 Milan, Italy
5
Department of Environmental Science and Policy, via Celoria 2, University of Milan, 20133 Milan, Italy
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(5), 1183; https://doi.org/10.3390/polym12051183
Received: 10 April 2020 / Revised: 18 May 2020 / Accepted: 20 May 2020 / Published: 21 May 2020
(This article belongs to the Special Issue Biodegradable and Biobased Polymers Obtained via Step Polymerization)
Polylactide (PLA)-based polymers, functionalized with biobased antioxidants, were synthesized, to develop an intrinsically active, biobased and potentially biodegradable material for food packaging applications. To achieve this result, phenolic antioxidants were exploited as initiators in the ring opening polymerization of l-lactide. The molecular weight, thermal properties and in vitro radical scavenging activity of the polymers obtained were compared with the ones of a PLA Natureworks 4043D, commonly used for flexible food packaging applications. The most promising synthesized polymer, bearing vanillyl alcohol as initiator (PLA-VA), was evaluated for active food packaging applications. Packaging with PLA-VA films reduced color and fat oxidation of salami during its shelf life. View Full-Text
Keywords: polylactic acid; phenolic antioxidant; vanillyl alcohol; active food packaging; salami; shelf life polylactic acid; phenolic antioxidant; vanillyl alcohol; active food packaging; salami; shelf life
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MDPI and ACS Style

Ortenzi, M.A.; Gazzotti, S.; Marcos, B.; Antenucci, S.; Camazzola, S.; Piergiovanni, L.; Farina, H.; Di Silvestro, G.; Verotta, L. Synthesis of Polylactic Acid Initiated through Biobased Antioxidants: Towards Intrinsically Active Food Packaging. Polymers 2020, 12, 1183.

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