Švarc Tilen, Zadravec Matej, Jelen Žiga, Majerič Peter, Kamenik Blaž, Rudolf Rebeka
Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia.
Materials (Basel). 2023 Jul 22;16(14):5162. doi: 10.3390/ma16145162.
This study demonstrates the successful synthesis of Ni/YO nanocomposite particles through the application of ultrasound-assisted precipitation using the ultrasonic spray pyrolysis technique. They were collected in a water suspension with polyvinylpyrrolidone (PVP) as the stabiliser. The presence of the YO core and Ni shell was confirmed with transmission electron microscopy (TEM) and with electron diffraction. The TEM observations revealed the formation of round particles with an average diameter of 466 nm, while the lattice parameter on the Ni particle's surface was measured to be 0.343 nm. The Ni/YO nanocomposite particle suspensions were lyophilized, to obtain a dried material that was suitable for embedding into a polylactic acid (PLA) matrix. The resulting PLA/Ni/YO composite material was extruded, and the injection was moulded successfully. Flexural testing of PLA/Ni/YO showed a slight average decrease (8.55%) in flexural strength and a small decrease from 3.7 to 3.3% strain at the break, when compared to the base PLA. These findings demonstrate the potential for utilising Ni/YO nanocomposite particles in injection moulding applications and warrant further exploration of their properties and new applications in various fields.
本研究展示了通过应用超声喷雾热解技术的超声辅助沉淀法成功合成Ni/YO纳米复合颗粒。它们以聚乙烯吡咯烷酮（PVP）作为稳定剂收集在水悬浮液中。通过透射电子显微镜（TEM）和电子衍射确认了YO核和Ni壳的存在。TEM观察显示形成了平均直径为466 nm的圆形颗粒，同时测量出Ni颗粒表面的晶格参数为0.343 nm。将Ni/YO纳米复合颗粒悬浮液冻干，以获得适合嵌入聚乳酸（PLA）基质的干燥材料。将所得的PLA/Ni/YO复合材料进行挤出，并成功注塑成型。与基础PLA相比，PLA/Ni/YO的弯曲测试表明弯曲强度平均略有下降（8.55%），断裂应变从3.7%小幅下降至3.3%。这些发现证明了在注塑应用中利用Ni/YO纳米复合颗粒的潜力，并值得进一步探索它们在各个领域的性能和新应用。
