用于增材制造加工的聚合物混合物的热力学性能评估:对多乳酸和多乳酸/多基酸盐混合物的比较研究
Jacek Andrzejewski1, Katarzyna Skórczewska2, Mateusz Barczewski1
1Institute of Materials Technology, Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3 Street, 61-138 Poznan, Poland.
Polymers
|September 27, 2025
概括
优化沉积建模 (FDM) 打印条件可以增强聚乳酸 (PLA) 和PLA/聚酸酸盐 (PHA) 混合物的热力学性能. 调整床平台温度可以显著提高Vicat的软化温度和机械强度.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物工程 聚合物工程
- 增材制造 增材制造 增材制造
背景情况:
- 未经修改的聚乳酸 (PLA) 是一种广泛使用的3D打印材料,但它有脆性和有限的耐热性.
- 聚氨基酸 (PHA) 与PLA的混合物正在被探索,作为提供改进性能的潜在替代品.
- 沉积建模 (FDM) 是一种常见的增材制造技术,其中工艺参数可以影响材料性能.
研究的目的:
- 评估FDM印刷工艺条件,特别是床平台温度对未经修改的PLA和PLA/PHA混合物的性能的影响.
- 在各种打印参数下对PLA和PLA/PHA的热力学和机械性能进行比较分析.
- 研究PLA/PHA在3D打印应用中作为纯PLA的优质替代品的潜力.
主要方法:
- 对未经修改的PLA和经过FDM打印的PLA/PHA混合物进行比较分析.
- 修改FDM过程参数,重点关注床平台温度.
- 热力学性能 (维卡特软化温度) 和机械性能 (包括冲击强度和异构性) 的评估.
- 分析材料晶度及其与印刷条件的相关性.
主要成果:
- 增加床平台温度显著改善了PLA和PLA/PHA的热力学性能,使Vicat软化温度提高了约80°C (超过130°C).
- 当打印参数被优化时,纯PLA在大多数机械性能,特别是冲击强度方面表现出显著的改进.
- 观察到显著的材料异质性,与不同的床平台温度及其对PLA相结晶的影响有关 (结晶度从17%到33%).
结论:
- 优化FDM打印参数,特别是床平台温度,对于提高PLA和PLA/PHA混合物的热力学和机械性能至关重要.
- /PHA混合物是纯的有希望的替代品,提供更好的耐热性和更低的脆性.
- 建议进行进一步的研究,以充分实现PLA/PHA混合物在增材制造中的应用潜力.
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