Petousis Markos, Vidakis Nectarios, Mountakis Nikolaos, Grammatikos Sotirios, Papadakis Vassilis, David Constantine N, Moutsopoulou Amalia, Das Subrata C
Department of Mechanical Engineering, Hellenic Mediterranean University, 71410 Heraklion, Greece.
Laboratory for Advanced and Sustainable Engineering Materials (ASEMlab), Department of Manufacturing and Civil Engineering, Norwegian University of Science and Technology, 2815 Gjovik, Norway.
Polymers (Basel). 2022 Aug 26;14(17):3492. doi: 10.3390/polym14173492.
In this work, the effect of silicon carbide (carborundum, SiC), as a boosting agent of the mechanical response of the polycarbonate (PC) polymer, was investigated. The work aimed to fabricate nanocomposites with an improved mechanical performance and to further expand the utilization of 3D printing in fields requiring an enhanced material response. The nanocomposites were produced by a thermomechanical process in various SiC concentrations in order to evaluate the filler loading in the mechanical enhancement. The samples were 3D printed with the material extrusion (MEX) method. Their mechanical performance was characterized, following international standards, by using dynamic mechanical analysis (DMA) and tensile, flexural, and Charpy's impact tests. The microhardness of the samples was also measured. The morphological characteristics were examined, and Raman spectra revealed their structure. It was found that SiC can improve the mechanical performance of the PC thermoplastic. A 19.5% increase in the tensile strength was found for the 2 wt.% loading nanocomposite, while the 3 wt.% nanocomposite showed a 16% increase in the flexural strength and a 35.9% higher impact strength when compared to the unfilled PC. No processability issues were faced for the filler loadings that have been studied here.
在本研究中，研究了碳化硅（金刚砂，SiC）作为聚碳酸酯（PC）聚合物机械响应增强剂的效果。这项工作旨在制备具有改进机械性能的纳米复合材料，并进一步扩大3D打印在需要增强材料响应的领域中的应用。通过热机械工艺制备了不同SiC浓度的纳米复合材料，以评估填料负载量对机械增强的影响。采用材料挤出（MEX）方法对样品进行3D打印。按照国际标准，通过动态力学分析（DMA）以及拉伸、弯曲和夏比冲击试验对其机械性能进行了表征。还测量了样品的显微硬度。对形态特征进行了检查，拉曼光谱揭示了它们的结构。结果发现，SiC可以改善PC热塑性塑料的机械性能。对于2 wt.%负载量的纳米复合材料，拉伸强度提高了19.5%，而与未填充的PC相比，3 wt.%的纳米复合材料弯曲强度提高了16%，冲击强度提高了35.9%。对于此处研究的填料负载量，未遇到加工性问题。
