- 期刊
- OpenAccess
Fabrication and Properties of Wood-Polylactic Acid Composite Filaments for Fused Deposition Modeling 3D Printing
木粉／聚乳酸複合3D列印線材的製造及性質分析
摘要
Three-dimensional (3D) printing is an emerging technology that is transforming manufacturing technology due to its unique advantages such as freeform fabrication, sustainability, and efficient manufacturing. In this study, we developed a wood flour (WF)/polylactic acid (PLA) composite filament for fused deposition modeling (FDM) 3D printing and analyzed its composite properties. Results showed that the tensile strength of the WF/PLA composite was considerably less than that of neat PLA. By adding 10 wt% of thermoplastic polyurethane (TPU) as a toughening agent, the elongation-at-break value of the WF/PLA composite was greater than that of neat PLA. This shows that the toughening agent could increase the ductility of the WF/PLA composite, leading to a better printing experience. We found a significant relationship among extrusion temperatures and dimensional stability of printed objects, whereas the surface roughness of specimens increased as the extrusion temperatures increased. A higher infill rate and greater extrusion layer height were both shown to give the printed object better dimensional stability.
並列摘要
三維（3D）列印是一項新興的技術，由於其獨特的優勢，例如形式自由、可持續性和效率性，正在改變傳統的製造技術。本研究開發了一種用於熔融沉積成型3D列印機的木粉／聚乳酸複合3D列印線材，並分析了它的性能。研究結果顯示，木粉／聚乳酸複合線材的拉伸強度遠低於純聚乳酸。在添加10％重量比的熱塑性聚胺酯（TPU）作為增韌劑後，木粉／聚乳酸複合線料的拉伸強度會顯著增加，它的斷裂伸長率也會大於純聚乳酸。這表示增韌劑可以增加木粉／聚乳酸複合線材的延展性，從而帶來更好的列印體驗。我們也發現列印時噴頭溫度與列印物件的尺寸穩定性間存在著顯著的相關，列印溫度愈高時，列印物件的尺寸穩定性愈好，但列印物件的表面粗糙度會隨著擠出溫度的升高而增加。較高的填充率和列印層高顯示會為列印物件提供更好的尺寸安定性。