Interfacial reinforcement mechanism in poly(lactic acid)/natural fiber biocomposites featuring ZnO nanowires at the interface

Poly(lactic acid) (PLA)/natural fiber (NF) biocomposite is available from renewable resources and can degrade totally in the environment, but suffers from poor interfacial adhesion. Here, we adopted two-step hydrothermal method to functionalize zinc oxide (ZnO) nanowires on the NF surface driven by...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Materials & design 2020-01, Vol.186, p.108332, Article 108332
Hauptverfasser: Yang, Changhua, Han, Rui, Nie, Min, Wang, Qi
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Poly(lactic acid) (PLA)/natural fiber (NF) biocomposite is available from renewable resources and can degrade totally in the environment, but suffers from poor interfacial adhesion. Here, we adopted two-step hydrothermal method to functionalize zinc oxide (ZnO) nanowires on the NF surface driven by strong intramolecular interaction. The perfect integration of the root-like NF and PLA matrix via the laterally-grown ZnO nanowires enabled the corresponding composite to present excellent interfacial adhesion. This can be exemplified by the substantial increases of 157% and 403% in interfacial shear strength and the debonding energy compared to PLA/pristine NF composite. Finally, a comprehensive understanding on the interfacial reinforcement caused by the laterally-grown ZnO nanowires was elucidated based on finite element method and the fracture morphology after the single fiber pull-out test. This study can provide an interfacial manipulation strategy on topological architecture to improve the interfacial properties of the environmentally-friendly PLA/NF biocomposite, which is instructive to achieve the large-scale application. [Display omitted] •Root-like NFs with laterally-grown ZnO nanowires were constructed directly without any pre-treatment via hydrothermal method.•Laterally-grown ZnO nanowires were beneficial to enhance interfacial properties of PLA/NF composite.•A comprehensive understanding on the interfacial reinforcement was established.
ISSN:0264-1275
1873-4197
DOI:10.1016/j.matdes.2019.108332