A Biodegradable and Sustainable Polymeric Nanocomposite Based on Modified Cellulose Nanofibers with Outstanding Mechanical Properties
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초록
내용
A biodegradable and sustainable polymeric nanocomposite (BSPN) with enhanced mechanical properties is developed using cellulose nanofibers (CNFs) modified by a heterocyclic surfactant. A blend of poly(butylene adipate terephthalate) (PBAT) and poly(lactic acid) (PLA) in a weight ratio of 9 to 1 serves as a matrix, while sustainable CNF sourced from biomass acts as a reinforcing agent. A heterocyclic surfactant (HS) composed of isosorbide and PLA is synthesized and employed to facilitate the effective exfoliation of strongly aggregated CNFs. Consequently, the excellent dispersion of HS-coated CNFs in BSPN leads to superior mechanical properties compared to the pure PBAT/PLA blend without CNFs. Specifically, tensile strength, toughness, and elongation at the break of BSPN are dramatically enhanced by 21.68%, 65.92%, and 51.71%, respectively. A mechanism for significantly improved mechanical properties of BSPN is also proposed in this study.