Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE Process diagram for preparation and characterization of composites.

ABSTRACT
The effect of four wood fibers (Rosewood, White oak, Black walnut, Classic birch)/PLA composites was studied, which were prepared by 3D printing technology. Considering the actual service environment, the short-term hydrothermal test was performed, and the wear and mechanical behavior of four wood fibers/PLA composites were characterized. The characterization results indicated that the Rosewood fiber/PLA composite had better mechanical properties than the other wood fibers; the addition of wood fiber can improve its wear resistance, deformation resistance and water resistance ability. The improvement of key indicators can be observed by the surface microstructure and cross-sectional microstructure morphology, Stable and stronger interfacial adhesion resulted in better deformation and heat resistance ability. However, after short-term hydrothermal aging, these obvious interfacial defects led to the decline of wear resistance and deformation resistance ability. There are a lot of gaps between the fiber and matrix, which raised an increase in water absorption. These data are beneficial for the application of wood fibers in composites with PLA matrix.