Vidakis Nectarios, Petousis Markos, Maniadi Athena, Koudoumas Emmanuel, Kenanakis George, Romanitan Cosmin, Tutunaru Oana, Suchea Mirela, Kechagias John
Mechanical Engineering Department, Hellenic Mediterranean University, 71004 Heraklion, Greece.
Department of Materials Science and Technology, University of Crete, 70013 Heraklion Crete, Greece.
Micromachines (Basel). 2020 Jun 25;11(6):615. doi: 10.3390/mi11060615.
In order to expand the mechanical and physical capabilities of 3D-printed structures fabricated via commercially available 3D printers, nanocomposite and microcomposite filaments were produced via melt extrusion, 3D-printed and evaluated. The scope of this work is to fabricate physically and mechanically improved nanocomposites or microcomposites for direct commercial or industrial implementation while enriching the existing literature with the methodology applied. Zinc Oxide nanoparticles (ZnO nano) and Zinc Oxide micro-sized particles (ZnO micro) were dispersed, in various concentrations, in Acrylonitrile Butadiene Styrene (ABS) matrices and printable filament of ~1.75mm was extruded. The composite filaments were employed in a commercial 3D printer for tensile and flexion specimens' production, according to international standards. Results showed a 14% increase in the tensile strength at 5% wt. concentration in both nanocomposite and microcomposite materials, when compared to pure ABS specimens. Furthermore, a 15.3% increase in the flexural strength was found in 0.5% wt. for ABS/ZnO nano, while an increase of 17% was found on 5% wt. ABS/ZnO micro. Comparing the two composites, it was found that the ABS/ZnO microcomposite structures had higher overall mechanical strength over ABS/ZnO nanostructures.
为了扩展通过商用3D打印机制造的3D打印结构的机械和物理性能，通过熔融挤出制备了纳米复合材料和微复合材料长丝，进行了3D打印和评估。这项工作的范围是制造物理和机械性能得到改善的纳米复合材料或微复合材料，以便直接用于商业或工业应用，同时用所应用的方法丰富现有文献。将氧化锌纳米颗粒（ZnO纳米）和氧化锌微米级颗粒（ZnO微米）以不同浓度分散在丙烯腈-丁二烯-苯乙烯（ABS）基体中，并挤出直径约1.75mm的可打印长丝。根据国际标准，将复合长丝用于商用3D打印机以生产拉伸和弯曲试样。结果表明，与纯ABS试样相比，纳米复合材料和微复合材料在5%重量浓度下的拉伸强度提高了14%。此外，ABS/ZnO纳米在0.5%重量浓度下的弯曲强度提高了15.3%，而ABS/ZnO微米在5%重量浓度下的弯曲强度提高了17%。比较这两种复合材料发现，ABS/ZnO微复合材料结构的整体机械强度高于ABS/ZnO纳米结构。
