DEVELOPMENT OF NANOSTRUCTURED FILMS BASED ON PLA AND CHITOSAN NANOPARTICLES GENERATED BY SUPERCRITICAL CO 2 ASSISTED PROCESSES

Abstract : In this study, supercritical processes were setup to generate chitosan nanoparticles that were incorporated in biobased PLA films produced by cast extrusion. Firstly, chitosan nanoparticles were generated using two CO 2 based processes: (1) Supercritical AntiSolvent process where CO 2 acts as an antisolvent towards an acetic acid aqueous solution. Nanoparticles with an average size of 378 nm were obtained. (2) Sc-CO 2 assisted solubilisation and atomization process where chitosan was dissolved in CO 2 acidified water followed by spray-drying. Dried nanoparticles with a median diameter of 400 nm were generated. These generated nanoparticles and other chitosan particles were dispersed in PLA (2.4% w/w) by cast extrusion using a micro-compounder. The morphology and properties of the resultant nanostructured composite films were studied. Particles dispersion and size distribution within the films were analysed by optical and scanning electron microscopy and showed a good dispersion of the particles with no agglomeration. Differential scanning calorimetry revealed a nucleating effect of the chitosan nanoparticles.
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Communication dans un congrès
16th European conference on composite materials, Jun 2014, Seville, Spain. Conference proceedings, 2014, 〈www.eccm16.org/〉
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Nibal Hijazi, Nicolas Le Moigne, Elisabeth Rodier, Jean‐jacques Letourneau, Martial Sauceau, et al.. DEVELOPMENT OF NANOSTRUCTURED FILMS BASED ON PLA AND CHITOSAN NANOPARTICLES GENERATED BY SUPERCRITICAL CO 2 ASSISTED PROCESSES. 16th European conference on composite materials, Jun 2014, Seville, Spain. Conference proceedings, 2014, 〈www.eccm16.org/〉. 〈hal-01258547〉

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