Alsaedi Wael H, Abu Al-Ola Khulood A, Alhaddad Omaima, Albelwe Zyzafon, Alawaji Renad, Abu-Dief Ahmed M
Department of Chemistry, College of Science, Taibah University, Al-Madinah Al-Munawarah P.O. Box 30002, Saudi Arabia.
Department of Chemistry, Faculty of Science, Sohag University, Sohag 82524, Egypt.
Polymers (Basel). 2024 Apr 24;16(9):1190. doi: 10.3390/polym16091190.
Nanoparticles of spinel ferrites with a composition of CoCuFeO (AM NPs) were effectively synthesized via a hydrothermal route. The structure of ferrite nanoparticles was characterized with X-ray diffraction, which showed a single cubic spinel phase. Energy-dispersive X-ray (EDX) spectroscopy and field emission-scanning electron microscopy (FE-SEM) were employed to analyse elemental composition and surface morphology, respectively. Moreover, the effects of the CoCuFeO on the morphology of [PLA = polylactic acid] nanocomposites were examined through polarized light optical microscopy (POM) and X-ray diffraction (XRD). The thermal behaviours for tested samples were studied through [DSC = differential scanning calorimetry] and [TGA = thermal gravimetric analysis]. A great number of minor PLA spherulites were detected using POM in the presence of the CoCuFeO ceramic magnetic nanoparticles (AM), increasing with AM nanoparticle contents. X-ray diffraction (XRD) analysis showed that the presence of nanoparticles led to an increase in the intensity of diffraction peaks. The DSC findings implied that the crystallization behaviours for the efficient PLA as well as its nanocomposites were affected by the addition of AM nanoparticles. They act as efficient nucleating agents because they shift the temperature of crystallization to a lower value. The Avrami models were used to analyse kinetics data. The experimental data were well described using the Avrami method for all samples tested. The addition of AM to the PLA matrix resulted in a decrease in the crystallization half-time t values, indicating a faster crystallization rate. TGA data showed that the occurrence of AM nanoparticles decreased the thermal stability of PLA.
通过水热法有效地合成了组成为CoCuFeO的尖晶石铁氧体纳米颗粒（AM纳米颗粒）。用X射线衍射对铁氧体纳米颗粒的结构进行了表征，结果表明其为单一的立方尖晶石相。分别采用能量色散X射线（EDX）光谱和场发射扫描电子显微镜（FE-SEM）分析元素组成和表面形貌。此外，通过偏光光学显微镜（POM）和X射线衍射（XRD）研究了CoCuFeO对[PLA =聚乳酸]纳米复合材料形态的影响。通过差示扫描量热法（DSC）和热重分析（TGA）研究了测试样品的热行为。在CoCuFeO陶瓷磁性纳米颗粒（AM）存在的情况下，用POM检测到大量较小的聚乳酸球晶，其数量随AM纳米颗粒含量的增加而增加。X射线衍射（XRD）分析表明，纳米颗粒的存在导致衍射峰强度增加。DSC结果表明，添加AM纳米颗粒会影响高效聚乳酸及其纳米复合材料的结晶行为。它们起到有效的成核剂作用，因为它们将结晶温度降低到了更低的值。采用Avrami模型分析动力学数据。对于所有测试样品，实验数据都能用Avrami方法很好地描述。向聚乳酸基体中添加AM导致结晶半衰期t值降低，表明结晶速率加快。热重分析（TGA）数据表明，AM纳米颗粒的存在降低了聚乳酸的热稳定性。
