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3D打印木质-PLA复合材料:木质颗粒尺寸的影响
Wojciech Jasiński1, Karol Szymanowski1, Barbara Nasiłowska2
1Institute of Wood Sciences and Furniture, Warsaw University of Life Sciences-SGGW, 159 Nowoursynowska St., 02-776 Warsaw, Poland.
Polymers
|May 14, 2025
概括
3D打印丝中的木材填充剂颗粒大小不会显著影响拉伸性能. 较大的颗粒会增加挤出力,并可能阻碍印刷,对于木质-PLA复合材料,建议使用较小的尺寸.
科学领域:
- 材料科学 材料科学 材料科学
- 增材制造 增材制造 增材制造
- 聚合物复合材料 聚合物复合材料
背景情况:
- 颗粒大小是传统木聚合物复合材料 (WPC) 的关键因素.
- 有限的研究存在于木材填充剂颗粒大小在化沉积建模 (FDM) 3D打印丝的影响.
- 了解这种关系对于优化3D打印可用的木质-PLA复合材料至关重要.
研究的目的:
- 研究木材填充剂颗粒大小对再生PLA基复合材料的机械性能和挤出能力的影响,用于FDM3D打印.
- 为成功的3D打印应用确定最佳木质颗粒大小范围.
主要方法:
- 制备五种具有明显木质颗粒大小分布 (<0.2毫米至0.8毫米-1毫米) 的PLA-粉复合材料变体.
- 挤出电流吸收,拉力强度和拉力模块的测试.
- 使用扫描电子显微镜/能量分散式X射线光谱 (SEM/EDS) 进行材料表征.
主要成果:
- 拉力强度在9.21 MPa至14.28 MPa之间,拉力模量在802 MPa至1014 MPa之间,与木质颗粒大小没有明显的相关性.
- 挤出力随着木材颗粒大小的增加而显著增加.
- 具有最大颗粒大小 (0.8毫米-1毫米) 的复合材料由于过度挤出阻力而无法打印.
结论:
- 在3D打印尺度下,木质颗粒大小对PLA复合材料的拉伸性能产生最小的影响.
- 用于3D打印PLA复合材料的最佳木质颗粒尺寸应在喷嘴直径的五分之一到一半之间,以平衡可打印性和材料性能.
- 较大的木质颗粒增加了加工挑战,并限制了FDM3D打印用于木材填充纤维的可行性.
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