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Potential of Lignins as Antioxidant Additive in Active Biodegradable Packaging Materials

Article dans une revue avec comité de lecture
Author
DOMENEK, Sandra
135726 Ingénierie Procédés Aliments [GENIAL]
LOUAIFI, Abderrahim
135726 Ingénierie Procédés Aliments [GENIAL]
GUINAULT, Alain
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
BAUMBERGER, Stephanie
10916 Institut Jean-Pierre Bourgin [IJPB]

URI
http://hdl.handle.net/10985/8097
DOI
10.1007/s10924-013-0570-6
Date
2013
Journal
Journal of Polymers and the Environment

Abstract

Due to their polyphenolic structure lignins bear a number of interesting functional properties, such as antioxidant activity. Natural antioxidants are very much looked for in the aim of protection of light or oxygen sensitive goods and are being used in active packaging. Poly(lactide) (PLA)-lignin films were prepared by twin screw extrusion followed by thermo-compression using two different commercial sources of alkali lignins obtained from gramineous plants. A good dispersion of lignin in the matrix was observed. Mechanical properties of the compounded material were merely diminished and oxygen barrier properties slightly enhanced. The chromatographic study of the lignins revealed that the low molecular weight fraction of both lignins increased during the polymer processing. The migration of low molecular weight compounds in an ethanol/water solution simulating fatty foodstuff was performed and the antioxidant activity of the extract was analysed. It was found that the activity increases with increasing severity of the heat treatment because of the generation of free phenolic monomers during processing. These results open an interesting way for application of lignins as an active compound in packaging materials. Lignins do not impair the mechanical and barrier performance of the polymer and the plastics processing even allows for the generation of active substances.

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