Abstract
Oceans and soils have been contaminated with traditional plastic due to its lack of degradability. Therefore, green biopolymer composites reinforced with cellulose nanocrystal-zinc oxide hybrids (ZnO hybrids) with good biodegradation ability provided a positive impact on reducing environmental challenges. In this work, the effect of various morphologies of ZnO hybrids on the biodegradation ability of poly(butylene adipate-co-terephthalate), PBAT) under seawater, soil burial, and UV aging conditions were investigated. Sheet-like ZnO hybrids (s-ZnO hybrid) efficiently enhanced the mechanical, UV-blocking properties and biodegradation ability of PBAT nanocomposite films. Compared to neat PBAT, the best tensile strength of PBAT nanocomposite with 2 wt% s-ZnO hybrid was increased by 15.1%, meanwhile this nanocomposite films showed the highest biodegradation rate after 80 days of soil degradation and 90 days of seawater degradation. Besides, three possible biodegradation mechanisms of green PBAT nanocomposite films were presented, hinting that such PBAT nanocomposite have great promising packaging applications.
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Acknowledgments
The work was supported by Zhejiang Provincial Natural Science key Foundation of China (LZ20E030003), the Fundamental Research Funds of Zhejiang Sci-Tech University (2019Q001) and the Young Elite Scientists Sponsorship Program by CAST (2018QNRC001).
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GL: Conceptualization, Data curation, Investigation, Writing-original draft, Writing-review and editing. JZ: Project administration, Writing-review and Software. HY: Methodology, Writing-review and editing, Supervision. MJ: Investigation, Project administration. SYHA: Conceptualization, Writing—review and editing. YW: Investigation, Supervision.
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Lu, G., Zhu, J., Yu, H. et al. Degradation mechanism of green biopolyester nanocomposites with various cellulose nanocrystal based nanohybrids. Cellulose 28, 7735–7748 (2021). https://doi.org/10.1007/s10570-021-04031-1
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DOI: https://doi.org/10.1007/s10570-021-04031-1