Vidakis Nectarios, Petousis Markos, Michailidis Nikolaos, Grammatikos Sotirios, David Constantine N, Mountakis Nikolaos, Argyros Apostolos, Boura Orsa
Mechanical Engineering Department, Hellenic Mediterranean University, 71004 Heraklion, Crete, Greece.
Physical Metallurgy Laboratory, Mechanical Engineering Department, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Macedonia, Greece.
Nanomaterials (Basel). 2022 Feb 4;12(3):534. doi: 10.3390/nano12030534.
In the current study, nanocomposites of medical-grade polyamide 12 (PA12) with incorporated copper (I) oxide (cuprous oxide-CuO) were prepared and fully characterized for their mechanical, thermal, and antibacterial properties. The investigation was performed on specimens manufactured by fused filament fabrication (FFF) and aimed to produce multi-purpose geometrically complex nanocomposite materials that could be employed in medical, food, and other sectors. Tensile, flexural, impact and Vickers microhardness measurements were conducted on the 3D-printed specimens. The fractographic inspection was conducted utilizing scanning electron microscopy (SEM), to determine the fracture mechanism and qualitatively evaluate the process. Moreover, the thermal properties were determined by thermogravimetric analysis (D/TGA). Finally, their antibacterial performance was assessed through a screening method of well agar diffusion. The results demonstrate that the overall optimum performance was achieved for the nanocomposites with 2.0 wt.% loading, while 0.5 wt.% to 4.0 wt.% loading was concluded to have discrete improvements of either the mechanical, the thermal, or the antibacterial performance.
在当前的研究中，制备了含有氧化铜（氧化亚铜 - CuO）的医用级聚酰胺12（PA12）纳米复合材料，并对其机械、热学和抗菌性能进行了全面表征。该研究针对通过熔融长丝制造（FFF）制造的试样进行，旨在生产可用于医疗、食品和其他领域的多功能几何形状复杂的纳米复合材料。对3D打印的试样进行了拉伸、弯曲、冲击和维氏显微硬度测量。利用扫描电子显微镜（SEM）进行断口分析，以确定断裂机制并定性评估该过程。此外，通过热重分析（D/TGA）确定热性能。最后，通过琼脂扩散孔板筛选法评估其抗菌性能。结果表明，对于负载量为2.0 wt.%的纳米复合材料，实现了总体最佳性能，而负载量为0.5 wt.%至4.0 wt.%时，得出结论认为其在机械、热学或抗菌性能方面有不同程度的改善。
