工艺与制造英文2024被引 4
熔融沉积成型3D打印制备不同晶格结构聚乳酸复合支架的力学性能表征
Mechanical Characterization of Polylactic Acid Composite Scaffolds Formed in Different Lattice Structures by Fused Deposition Modeling-Based 3D Printing
Bora Uzun · Department of Biomechanics, Institute of Health Sciences, Dokuz Eylul University, Izmir, Turkey.
摘要整理
支架设计和物理性能在组织工程中具有重要作用。利用不同生物材料可开发具有多种结构的支架。采用熔融沉积成型（FDM）方法制备支架所用生物材料的热学和力学性能对应用成功至关重要。材料必须既适合生产工艺，又能用作支架。本研究设计了三种不同晶格结构的聚乳酸（PLA）支架。为测定PLA支架的力学性能，对样品施加800 N轴向压缩载荷，加载速率为20 mm/min，每组n=3。通过测量各组载荷下的最大位移数据，计算应力-应变值以确定支架刚度。同时对PLA支架模型进行了有限元分析。此外，还进行了扫描电子显微镜（SEM）、差热分析-热重分析（DTA-TGA）、差示扫描量热法（DSC）和X射线粉末衍射（XRD）分析。结果表明，支架设计对力学性能有显著影响。除材料外，支架设计是组织工程研究中最重要的参数。
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