Beyond Biodegradability of Poly(lactic acid) : Physical and Chemical Stability in Humid Environments

Jeancarlo R. Rocca-Smith; Orla Whyte; Claire-Helene Brachais; Dominique Champion; Francesca Piasente; Eva Marcuzzo; Alessandro Sensidoni; Frederic Debeaufort; Thomas Karbowiak

Beyond Biodegradability of Poly(lactic acid) : Physical and Chemical Stability in Humid Environments

Jeancarlo R. Rocca-Smith ^{1, 2} Orla Whyte ¹ Claire-Helene Brachais ³ Dominique Champion ² Francesca Piasente ⁴ Eva Marcuzzo ² Alessandro Sensidoni ² Frederic Debeaufort ^{5, 6} Thomas Karbowiak ^{1, *}

* Auteur correspondant

1 PAM - Procédés Alimentaires et Microbiologiques [Dijon]

2 DI4A - Dipartimento di Scienze AgroAlimentari, Ambientali e Animali - [Udine]

3 ICMUB - Institut de Chimie Moléculaire de l'Université de Bourgogne [Dijon]

4 Taghleef Industries

5 Département Génie biologique [IUT de Dijon/Auxerre - université de Bourgogne]

6 PAM - Procédés Alimentaires et Microbiologiques

Abstract : Poly(lactic acid) (PLA) is the most traded biodegradable and biobased material. It is largely used as ecofriendly substitute of conventional plastics. Nevertheless, one of the main limiting factors is its water sensitivity. PLA reacts with water and is hydrolyzed during time, which determines its performance. Limited information related to the hydrolysis mechanism driven by water in vapor state is available in scientific literature. Literature is mainly focused on the effects of water in liquid state. This lack of information is of significant importance, since PLA interacts with water in both phases. This work was aimed to give a full depiction of the chemical and physical changes of PLA in a large range of relative humidity environments (from 50 to 100% RH) and in contact with liquid water. This research clearly showed that the stability of PLA was influenced not only by the chemical potential of water molecules, but also by their physical state due to a different behavior of degradation products. From a practical point of view, the findings of this study can be used as strong scientific basis for giving recommendations about the use of this material in its applications as packaging or mulch films.

Keywords : Polylactide PLA Amorphous phase Glass-transition Relative-humidity Lactide copolymers Poly(l-lactic acid) Amorphous fractions Hydrolytic degradation In-vitro degradation Phosphate-buffered solution State of water Aging Hydrolysis Bioplastic

Type de document :

Article dans une revue

Domaine :

Sciences du Vivant [q-bio] / Ingénierie des aliments

Liste complète des métadonnées

https://hal-univ-bourgogne.archives-ouvertes.fr/hal-01509636
Contributeur : Pam - Université de Bourgogne <>
Soumis le : mardi 18 avril 2017 - 12:01:33
Dernière modification le : vendredi 24 mai 2019 - 09:50:09

Beyond Biodegradability of Poly(lactic acid) : Physical and Chemical Stability in Humid Environments

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