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    Chitin Nanocomposite Based on Plasticized Poly(lactic acid)/Poly(3-hydroxybutyrate) (PLA/PHB) Blends as Fully Biodegradable Packaging Materials

    Year: 2022

    Journal: Polymers, Volume 14, AUG

    Authors: Iglesias-Montes, Magdalena L.; Soccio, Michelina; Siracusa, Valentina; Gazzano, Massimo; Lotti, Nadia; Cyras, Viviana P.; Manfredi, Liliana B.

    Organizations: National Research Council of Argentina; ANCyPT [PICT17-1318, PICT19-2677]; National University of Mar del Plata; COST Action FUR4Sustain [CA18220]

    Keywords: poly(lactic acid); poly(hydroxybutyrate); chitin nanoparticles; nanocomposites; biodegradable polymers; packaging

    Fully bio-based poly(lactic acid) (PLA) and poly(3-hydroxybutyrate) (PHB) blends plasticized with tributyrin (TB), and their nanocomposite based on chitin nanoparticles (ChNPs) was developed using melt mixing followed by a compression molding process. The combination of PHB and ChNPs had an impact on the crystallinity of the plasticized PLA matrix, thus improving its oxygen and carbon dioxide barrier properties as well as displaying a UV light-blocking effect. The addition of 2 wt% of ChNP induced an improvement on the initial thermal degradation temperature and the overall migration behavior of blends, which had been compromised by the presence of TB. All processed materials were fully disintegrated under composting conditions, suggesting their potential application as fully biodegradable packaging materials.
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