Biocomposite films based on poly(lactic acid) and chitosan nanoparticles: elaboration, microstructural and thermal characterization

Nibal Hijazi; Nicolas Le Moigne; Élisabeth Rodier; Martial Sauceau; Thierry Vincent; Jean-Charles Bénézet; Jacques Fages

Biocomposite films based on poly(lactic acid) and chitosan nanoparticles: elaboration, microstructural and thermal characterization

Nibal Hijazi ^{1, 2} Nicolas Le Moigne ² Élisabeth Rodier ¹ Martial Sauceau ¹ Thierry Vincent ² Jean-Charles Bénézet ² Jacques Fages ¹

1 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement

2 C2MA - Centre des Matériaux des Mines d'Alès

Abstract : Structured and fully bio‐based polymer assemblies based on chitosan micro‐ and nano‐particles and poly(lactic acid) (PLA) were developed using a continuous cast‐film extrusion process. The microstructure and thermal properties of the resulting biocomposite films are studied. Dispersion and size distribution of chitosan particles within the films were analyzed by optical microscopy and laser diffraction. Results show a homogeneous dispersion with no particles agglomeration, due to favorable physico–chemical interactions between chitosan particles and PLA and weak particle cohesion within the agglomerates. Differential scanning calorimetry experiments evidence a pronounced nucleating effect as well as an enhanced crystal growth rate, and a great increase in crystallinity of PLA in the presence of chitosan particles. Furthermore, in the case of chitosan nanoparticles, no reduction of PLA molecular weight occurred as revealed by gel permeation chromatography. The dispersion of nanosized chitosan particles in PLA thus appears to be an efficient way to control its crystallization behavior without degrading its molecular characteristics.

Document type :

Journal articles

Domain :

Engineering Sciences [physics] / Materials

Chemical Sciences / Polymers

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https://hal-mines-albi.archives-ouvertes.fr/hal-01924005
Contributor : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Submitted on : Tuesday, November 27, 2018 - 3:42:59 PM
Last modification on : Monday, August 5, 2019 - 12:44:03 PM

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