Title :

Structure and Barrier Properties of Multinanolayered Biodegradable PLA/PBSA Films: Confinement Effect via Forced Assembly Coextrusion

Author(s) :

Messin, Tiphaine [Auteur]
Institut national des sciences appliquées Rouen Normandie [INSA Rouen Normandie]
Polymères Biopolymères Surfaces [PBS]
Normandie Université [NU]
Université de Rouen Normandie [UNIROUEN]
Follain, Nadège [Auteur]
Institut national des sciences appliquées Rouen Normandie [INSA Rouen Normandie]
Polymères Biopolymères Surfaces [PBS]
Normandie Université [NU]
Université de Rouen Normandie [UNIROUEN]
Guinault, Alain [Auteur]
Conservatoire National des Arts et Métiers [CNAM] [CNAM]
Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
Arts et Métiers ParisTech
Centre National de la Recherche Scientifique [CNRS]
Sollogoub, Cyrille [Auteur]
Conservatoire National des Arts et Métiers [CNAM] [CNAM]
Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
Arts et Métiers ParisTech
Centre National de la Recherche Scientifique [CNRS]
Gaucher, Valerie [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Delpouve, Nicolas [Auteur]
Institut national des sciences appliquées Rouen Normandie [INSA Rouen Normandie]
Normandie Université [NU]
Centre National de la Recherche Scientifique [CNRS]
Université de Rouen Normandie [UNIROUEN]
Groupe de physique des matériaux [GPM]
Marais, Stéphane [Auteur]
Institut national des sciences appliquées Rouen Normandie [INSA Rouen Normandie]
Polymères Biopolymères Surfaces [PBS]
Normandie Université [NU]
Université de Rouen Normandie [UNIROUEN]

Journal title :

ACS Applied Materials & Interfaces

Volume number :

9

Pages :

29101-29112

Publication date :

2017

HAL domain(s) :

Sciences de l'ingénieur [physics]/Matériaux
Sciences de l'ingénieur [physics]/Génie des procédés
Chimie/Matériaux
Chimie/Polymères

English abstract : [en]

Multilayer coextrusion processing was applied to produce 2049-layer film of poly(butylene succinate-co-butylene adipate) (PBSA) confined against poly(lactic acid) (PLA) using forced assembly, where the PBSA layer thickness ...
Show more >Multilayer coextrusion processing was applied to produce 2049-layer film of poly(butylene succinate-co-butylene adipate) (PBSA) confined against poly(lactic acid) (PLA) using forced assembly, where the PBSA layer thickness was about 60 nm. This unique technology allowed to process semicrystalline PBSA as confined polymer and amorphous PLA as confining polymer in a continuous manner. The continuity of PBSA layers within the 80/20 wt % PLA/PBSA layered films was clearly evidenced by atomic force microscopy (AFM). Similar thermal events to the reference films were revealed by thermal studies; indicating no diffusion of polymers during the melt-processing. Mechanical properties were measured for the multilayer film and the obtained results were those expected considering the fraction of each polymer, revealing the absence of delamination in the PLA/PBSA multinanolayer film. The confinement effect induced by PLA led to a slight orientation of the crystals, an increase of the rigid amorphous fraction (RAF) in PBSA with a densification of this fraction without changing film crystallinity. These structural changes allowed to strongly improve the water vapor and gas barrier properties of the PBSA layer into the multilayer film up to two decades in the case of CO2 gas. By confining the PBSA structure in very thin and continuous layers, it was then possible to improve the barrier performances of a biodegradable system and the resulting barrier properties were successfully correlated to the effect of confinement on the microstructure and the chain segment mobility of the amorphous phase. Such investigation on these multinanolayers of PLA/PBSA with the aim of evidencing relationships between microstructure implying RAF and barrier performances has never been performed yet. Besides, gas and water permeation results have shown that the barrier improvement obtained from the multilayer was mainly due to the reduction of solubility linked to the reduction of the free volume while the tortuosity effect, as usually expected, was not really observed. This work brings new insights in the field of physicochemical behaviors of new multilayer films made of biodegradable polyesters but also in interfacial processes due to the confinement effect induced in these multinanolayer structures obtained by the forced assembly coextrusion. This original coextrusion process was a very advantageous technique to produce eco-friendly materials with functional properties without the help of tie layer, additives, solvents, surface treatments, or inorganic fillers.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
ENSCL
CNRS
INRA

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Ingénierie des Systèmes Polymères

Submission date :

2019-05-16T17:21:14Z
2024-04-02T13:58:42Z