Abstract Amount of wood flour was gradually increased from 0 to 50 wt% in the production of polylactic acid (PLA) based filaments with 1.75 mm diameter using twin screw extruder. Surface roughness and wettability were measured of the specimens. Surface roughness of the specimens significantly increased with incorporation of wood flour into PLA filament. Wettability of the specimens significantly decreased with increasing wood flour content. This was mainly attributed to the higher surface free energy of PLA than the beech wood. Contact angle values of the 3D printed wood/PLA specimens having wood flour content up to 30 wt% were less than 90°.

中文翻译：

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木粉含量对木粉/PLA长丝制成的3D打印材料表面性能的影响

摘要 在使用双螺杆挤出机生产直径为 1.75 mm 的聚乳酸 (PLA) 基长丝时，木粉的用量从 0 wt% 逐渐增加到 50 wt%。测量样品的表面粗糙度和润湿性。将木粉加入 PLA 长丝后，试样的表面粗糙度显着增加。随着木粉含量的增加，试样的润湿性显着降低。这主要归因于 PLA 的表面自由能高于山毛榉木材。木粉含量高达 30 wt% 的 3D 打印木材/PLA 样品的接触角值小于 90°。