Development of Micro‐Crosslinked Poly(L‐Lactic Acid) With Flexible, Anti‐Aging, and Barrier Properties by In Situ Polymerization of Graphene Oxide

Journal of Polymer Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 19, 2025

ABSTRACT Although poly(L‐lactic acid) (PLLA) is biocompatible and degradable, its inherent brittleness, susceptibility to aging, low ultraviolet light (UV) resistance, moderate gas barrier properties limit diverse applications. In this study, graphene oxide (GO) was used as an initiator, unsaturated poly (butylene itaconate) (PBI) a flexible chain segment, GO‐grafted P(LA‐ g ‐BI) (GO‐ ‐PLBI) copolymer synthesized by in situ melt polycondensation of lactic acid. Nuclear magnetic resonance, Fourier transform infrared, X‐ray photoelectron spectroscopy results confirmed the successful synthesis GO‐g‐PLBI formation multi‐branched structure. The GO‐ ‐PLBI film demonstrated excellent ductility oxygen properties, with elongation at break increased 73.8 times compared PLLA, while permeability (OP) decreased 40.3%. incorporation PBI facilitated micro‐crosslinking within copolymer, thereby enhancing thermal stability. More gg gt conformations were formed crystallization induced aging inhibited, thus showing anti‐aging properties. Interestingly, OP value micro‐crosslinked 60.9% after physical demonstrating extremely high This study offers viable approach developing PLLA/graphene nanocomposites that exhibit adjustable flexibility, enhanced barrier, heat UV transparency.

Language: Английский

Preparation of poly(l-lactic acid) antibacterial film based on surface grafting of modified chitosan and its preservation effect on chilled beef

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: unknown, P. 139376 - 139376

Published: Dec. 1, 2024

Language: Английский