Preparation and characterization of magnetite/dextran nanocomposite used as a precursor of magnetic fluid
Preparation and characterization of magnetite/dextran nanocomposite used as a precursor of magnetic fluid
复制标题
磁性流体前驱体磁铁矿/葡聚糖纳米复合材料的制备及表征
DOI：
10.1016/j.cej.2009.03.034
复制
发表时间：
2009-08-01
影响因子：
15.1
通讯作者：
Li, H. Z.
中科院分区：
文献类型：
--
作者：
Hong, R. Y.;Li, J. H.;Li, H. Z.
采用氢氧化铵（NH 4 OH）共沉淀Fe 2+和Fe 3+的方法制备磁性纳米粒子。通过X射线粉末衍射对所得纳米粒子进行了表征。透射电子显微镜、扫描电子显微镜、傅里叶变换红外（FT-IR）光谱和振动样品磁强计。为了制备具有生物相容性的水基磁流体，通过两步法用葡聚糖修饰纳米颗粒。研究了葡聚糖分子量对纳米复合材料的尺寸、形貌、包覆效率和磁性能的影响。通过球磨将磁铁矿/葡聚糖纳米复合材料分散在水中以形成磁流体。采用旋转流变仪研究了磁流体的流变性能。(C)2009 Elsevier B. V.保留所有权利。
Magnetic nanoparticles were synthesized by the co-precipitation of Fe2+ and Fe3+ using ammonium hydroxide (NH4OH). The obtained nanoparticles were characterized by X-ray powder diffraction. transmission electron microscopy, scanning electron microscopy, Fourier transform infrared (FT-IR) spectroscopy and vibrating sample magnetometer. In order to prepare a biocompatible water-based magnetic fluid, the nanoparticles were modified by dextran through a two-step method. The influences of dextran molecular weight on the size, morphology, coating efficiency and magnetic property of magnetite/dextran nanocomposite were investigated. The magnetite/dextran nanocomposite was dispersed in water to form a magnetic fluid by ball milling. The rheological property of magnetic fluids was investigated using a rotating rheometer. (C) 2009 Elsevier B.V. All rights reserved.