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首页> 美国卫生研究院文献>Polymers >3D Printing and Solvent Dissolution Recycling of Polylactide–Lunar Regolith Composites by Material Extrusion Approach
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3D Printing and Solvent Dissolution Recycling of Polylactide–Lunar Regolith Composites by Material Extrusion Approach

机译：通过材料挤出方法将3D印刷和溶剂溶解回收聚物 - 月球凝固性复合材料

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The in situ resource utilization of lunar regolith is of great significance for the development of planetary materials science and space manufacturing. The material extrusion deposition approach provides an advanced method for fabricating polylactide/lunar regolith simulant (PLA/CLRS-1) components. This work aims to fabricate 3D printed PLA–lunar regolith simulant (5 and 10 wt.%) components using the material extrusion 3D printing approach, and realize their solvent dissolution recycling process. The influence of the lunar regolith simulant on the mechanical and thermal properties of the 3D printed PLA/CLRS-1 composites is systematically studied. The microstructure of 3D printed PLA/CLRS-1 parts was investigated by scanning electron microscopy (SEM) and X-ray computed tomography (XCT) analysis. The results showed that the lunar regolith simulant can be fabricated and combined with a PLA matrix utilizing a 3D printing process, only slightly influencing the mechanical performance of printed specimens. Moreover, the crystallization process of PLA is obviously accelerated by the addition of CLRS-1 because of heterogeneous nucleation. Additionally, by using gel permeation chromatography (GPC) and attenuated total reflectance Fourier transform infrared (ATR-FTIR) characterization, it is found that the 3D printing and recycling processes have a negligible influence on the chemical structure and molecular weight of the PLA/CLRS-1 composites. As a breakthrough, we successfully utilize the lunar regolith simulant to print components with satisfactory mechanical properties and confirm the feasibility of recycling and reusing 3D printed PLA/CLRS-1 components via the solvent dissolution recycling approach.
机译：农历概况的原位资源利用对于行星材料科学和太空制造的发展具有重要意义。材料挤出沉积方法提供了制造聚丙酯/月球重新熔模拟剂（PLA / CLRS-1）组分的先进方法。这项工作旨在使用材料挤出3D打印方法制造3D印刷PLA-Lunar umolith模拟器（5和10wt.％）组件，并实现其溶剂溶解回收过程。系统地研究了月球重新利用模拟对3D印刷PLA / CLRS-1复合材料的机械和热性能的影响。通过扫描电子显微镜（SEM）和X射线计算断层扫描（XCT）分析来研究3D印刷PLA / CLRS-1份的微观结构。结果表明，利用3D印刷工艺，可以制造和结合PLA矩阵，仅略微影响印刷样本的机械性能，与PLA矩阵合并。此外，由于异质成核，加入CLRS-1，PLA的结晶过程明显加速。另外，通过使用凝胶渗透色谱（GPC）和衰减的总反射率傅里叶变换红外（ATR-FTIR）表征，发现3D打印和再循环过程对PLA / CLRS的化学结构和分子量具有可忽略不计的影响-1复合材料。作为突破，我们成功利用了月球重新旋转性模拟程序，以通过溶剂溶解回收方法确认回收和重用3D印刷PLA / CLRS-1组分的回收和重用3D印刷PLA / CLRS-1组分的可行性。

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