Communication Dans Un Congrès Année : 2019

Development of nanocellulose-based high gas barrier composites for packaging

Résumé

Polylactic Acid (PLA) is a bio-degradable, thermoplastic polyester with overall good mechanical properties, which makes it an interesting and reliable substitute for the classical non-renewable polymers. However, PLA’s barrier properties are often limited, resulting in an inadequacy for prolonged food packaging requirements. This property shortage generally requires an additional reinforcement to the polymeric matrix. The aim of this work was to increase those barrier performances by introducing a bio-based filler (Cellulose Nanocrystals) to the polymeric matrix. In this work, we targeted two modification routes: chemical and physical surface modifications to enhance the compatibility between the filler and the matrix. For the chemical modification and for the sake of comparison, two acids were used as compatibilizers (via esterification): a short (Pentanoic) and a medium chain fatty acid (Lauric). The necessary conditions required to obtain the composites (by both solvent and melt routes) are presented, allowing high reproducibility from sample to sample. The effect of unmodified and modified nanocellulose particles on the overall properties of PLA have also been investigated; the adhesion between the matrix and the filler was enhanced after the modification, especially for the Lauric Acid-modified CNCs, as well as the barrier properties.

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Dates et versions

hal-03906660 , version 1 (19-12-2022)

Identifiants

  • HAL Id : hal-03906660 , version 1

Citer

Hajar Faraj, Sandra Domenek, Cyrille Sollogoub, Alain Guinault. Development of nanocellulose-based high gas barrier composites for packaging. Matbim 2019, May 2019, Milan, Italy. ⟨hal-03906660⟩
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