Synthesis of monodisperse MFe2O4 (M = Fe and Zn) nanoparticles for polydiethylsiloxane-based ferrofluid with a solvothermal method
Synthesis of monodisperse MFe2O4 (M = Fe and Zn) nanoparticles for polydiethylsiloxane-based ferrofluid with a solvothermal method
复制标题
溶剂热法合成聚二乙基硅氧烷基铁磁流体用单分散 MFe2O4（M = Fe 和 Zn）纳米颗粒
DOI：
10.1016/j.materresbull.2014.12.058
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发表时间：
2015-09-01
影响因子：
5.4
通讯作者：
Shen, Hui
中科院分区：
文献类型：
--
作者：
Wang, Wei;Zhuang, Lin;Shen, Hui
通过一种新型溶剂热方法，以1-辛醇和1-辛胺为二元溶剂，油酸（OA）为表面活性剂，金属乙酰丙酮化物[M(acac)(3)]（M = Fe和Zn）为金属源，成功合成了单分散MFe2O4（M= Fe，Zn）纳米颗粒，用于聚二乙基硅氧烷基（PDES）铁磁流体（FFs）的应用。 X射线衍射仪证实所得纳米粒子是具有尖晶石结构的纯MFe2O4。红外光谱表明油酸通过羧酸盐（COO-）和金属阳离子之间的共价键结合到MFe2O4 的表面。 1-辛醇和1-辛胺的比例对于球形形态的形成起着关键作用。透射电子显微镜 (TEM) 图像证实 Fe3O4 颗粒尺寸为 4-11 nm，具有良好的单分散性和窄的尺寸分布。尺寸为7 nm的Fe3O4纳米颗粒的饱和磁化强度可达73.06 emu/g。与聚二甲基硅氧烷基 (PDMS) FF 相比，聚二乙基硅氧烷基 (PDES) FF 在低温（-7 至 20 摄氏度）下的粘度变化相对较小。对于 FF 应用，还讨论了粘度和温度之间的关系。 (C) 2014 Elsevier Ltd. 保留所有权利。
Monodisperse MFe2O4 (M= Fe, Zn) nanoparticles were successfully synthesized for the application of polydiethylsiloxane-based (PDES) ferrofluids (FFs) via a novel solvothermal method, with which 1-octanol and 1-octanamine act as binary solvent, oleic acid (OA) as the surfactant and metal acetylacetonate [M(acac)(3)](M = Fe and Zn) as the metal source. X-ray diffractometer confirms that the resultant nanoparticles are pure MFe2O4 with a spinet structure. Infrared spectroscopy indicates that oleic acid is bound to the surface of MFe2O4 through a covalent bond between carboxylate (COO-) and metal cations. The ratio of 1-octanol and 1-octanamine plays a key role in the formation of the sphere-shaped morphology. Transmission electron microscopy (TEM) images confirm that the Fe3O4 particles are of 4-11 nm with good monodispersity and a narrow size distribution. The saturation magnetization of Fe3O4 nanoparticles with sizes of 7 nm can reach up to 73.06 emu/g. Polydiethylsiloxane-based (PDES) FFs show relatively smaller changes of the viscosity with low temperatures (from -7 to 20 degrees C) than the polydimethylsiloxane-based (PDMS) FFs. For FFs applications, the relationship between viscosity and temperature is also discussed. (C) 2014 Elsevier Ltd. All rights reserved.