Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605 014, India.
Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605 014, India.
J Mech Behav Biomed Mater. 2023 Nov;147:106161. doi: 10.1016/j.jmbbm.2023.106161. Epub 2023 Oct 3.
Herein, material extrusion (MEX) technique is utilized to develop 3D printed models based on reinforcing β-Ca(PO)/α-AlO composite in polylactide (PLA) matrix. β-Ca(PO)/α-AlO composite has been synthesized through co-precipitation method and the phase content of β-Ca(PO) and α-AlO components are respectively determined as 64 and 36 wt%. The resultant β-Ca(PO)/α-AlO composite mixed with PLA at various weight ratios were extruded as filaments and subsequently 3D printed into definite shapes for the physiochemical, morphological and mechanical evaluation. 3D printed bodies that comprise 5 wt % β-Ca(PO)/α-AlO composite yielded an increasing tensile, compressive and flexural strength in the corresponding order of ∼15, ∼15 and 22% than 3D printed pure PLA. Further, the Representative volume element (RVE) unit cells developed based on the various investigated compositions of PLA-β-Ca(PO)/α-AlO were subjected to mechanical evaluation through Finite element analysis (FEA) under both static and dynamic loading conditions on ASTM standard specimens. The results from experimental and FEA analysis demonstrated good uniformity that confirmed the reinforcement of 5 wt % β-Ca(PO)/α-AlO in PLA matrix as an optimum combination to yield better mechanical strength.
本文利用材料挤出（MEX）技术，以聚乳酸（PLA）为基质，开发出基于增强β-Ca（PO）/α-AlO 复合材料的 3D 打印模型。β-Ca（PO）/α-AlO 复合材料通过共沉淀法合成，β-Ca（PO）和α-AlO 相的含量分别确定为 64wt%和 36wt%。将所得的β-Ca（PO）/α-AlO 复合材料与 PLA 以不同的重量比混合，挤出成纤维，然后 3D 打印成特定形状，进行物理化学、形态和机械性能评估。与 3D 打印纯 PLA 相比，包含 5wt%β-Ca（PO）/α-AlO 复合材料的 3D 打印体的拉伸、压缩和弯曲强度分别提高了约 15%、15%和 22%。此外，基于 PLA-β-Ca（PO）/α-AlO 的各种研究成分开发的代表性体积元（RVE）单元细胞，通过有限元分析（FEA）在 ASTM 标准试件上的静态和动态加载条件下进行了机械评估。实验和 FEA 分析的结果表明，均匀性较好，证实了 PLA 基质中 5wt%β-Ca（PO）/α-AlO 的增强作用是获得更好机械强度的最佳组合。
