研究3D打印的聚乳酸/聚-3-基酸复合材料的机械性能. 压缩性和疲劳性能的性能
Walter Crupano1, Bàrbara Adrover-Monserrat1, Jordi Llumà2
1Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est, Mechanical Engineering Department, Av. D'Eduard Maristany, 10-14, 08019, Barcelona, Spain.
Heliyon
|October 9, 2024
概括
这项研究调查了打印参数如何影响3D打印的多乳酸/多3基酸 (PLA/PHB) 混合物的机械性能. 结果显示,与纯PLA相比,PLA/PHB混合物具有较低的机械性能.
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
- 聚合物工程 聚合物工程
背景情况:
- 材料挤出 (MEX) 3D打印,最初用于原型,现在服务于机械和生物医学领域.
- 聚乳酸 (PLA) 是一个常见的MEX聚合物,由于其特性和有机起源.
- 可再生热塑性塑料,如PLA/木复合材料和PLA/Poly-3-hydroxybutyrate (PHB) 混合物,是为了可持续发展而开发的.
研究的目的:
- 描述关键打印参数对PLA/PHB混合物的机械性能的影响.
- 为了比较PLA/PHB与纯PLA和PLA木复合材料的机械性能.
- 通过MEX评估PLA/PHB混合物对于工业应用的适用性.
主要方法:
- 使用材料挤出 (MEX) 3D打印用于制造PLA/PHB混合样本.
- 进行压力和疲劳测试以评估机械性能.
- 将实验结果与纯PLA和PLA木复合材料的现有数据进行比较.
主要成果:
- PLA/PHB的压缩行为受到层高度,喷嘴直径和填充密度的显著影响.
- 疲劳行为主要取决于喷嘴直径和填充密度.
- 与纯PLA和PLA木材相比,PLA/PHB的机械性能较差 (Young's Modulus: 1.67 GPa,收益强度: 33.8 MPa,疲劳寿命: 9711 个周期).与纯PLA和PLA木材相比,PLA/PHB的机械性能较差.
结论:
- 层高度,喷嘴直径和填充密度等打印参数严重影响MEX中的PLA/PHB机械性能.
- 虽然PHB增强了PLA的生物降解性,但它在统计学上阻碍了基材的机械性能.
- PLA/PHB混合物显示出特定应用的潜力,但需要仔细的参数优化以减轻机械限制.
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