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

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 o...

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Bibliographic Details
Published in:Polymers 2022-08, Vol.14 (15), p.3177
Main Authors: Iglesias-Montes, Magdalena L., Soccio, Michelina, Siracusa, Valentina, Gazzano, Massimo, Lotti, Nadia, Cyras, Viviana P., Manfredi, Liliana B.
Format: Article
Language:English
Subjects:
Biocompatibility
Biodegradability
Biodegradable materials
Biopolymers
Carbon dioxide
Cellulose
Chitin
Composting
Crustaceans
Disintegration
Food
Food packaging
Hydrochloric acid
Nanocomposites
Nanocrystals
Nanoparticles
Nanostructured materials
Packaging
Polyhydroxybutyrate
Polylactic acid
Polymer blends
Polyvinyl alcohol
Pressure molding
Thermal degradation
Ultraviolet radiation
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Summary: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.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym14153177