锌-铜-铬-镧铁氧体及其与聚苯胺的纳米复合材料的制备与磁性
Preparation and magnetic properties of Zn-Cu-Cr-La ferrite and its nanocomposites with polyaniline.
作者信息
Li Liangchao, Liu Hui, Wang Yuping, Jiang Jing, Xu Feng
机构信息
Zhejiang Key Laboratory for Reactive Chemistry on Solid Surface, Zhejiang Normal University, Jinhua 321004, People's Republic of China.
出版信息
J Colloid Interface Sci. 2008 May 15;321(2):265-71. doi: 10.1016/j.jcis.2008.02.013. Epub 2008 Feb 14.
Nanosized Zn(0.6)Cu(0.4)Cr(0.5)Fe(1.5-x)La(x)O(4) (x=0 - 0.06) ferrites doped with La are synthesized by a rheological phase reaction method. Polyaniline (PANI)/ferrite nanocomposites are prepared by in situ polymerization method. The structure, morphology and ferromagnetic property of ferrite powders and nanocomposites are characterized by X-ray powder diffractometer (XRD), transmission electron microscope (TEM), Fourier transform infrared spectra (FTIR), UV-visible spectroscopy (UV), thermogravimetric analysis (TGA) and vibrating sample magnetometer (VSM). The results indicate that the PANI and nanosized ferrite powders can be combined effectively. The polymers can reduce the agglomeration of nanosized ferrite particles to some extent, which is good for the dispersedness and stabilization of nanoparticles. The PANI/ferrite nanocomposites under applied magnetic field exhibit the hysteretic loops of the ferromagnetic nature. The magnetic properties of nanocomposites are tailored by controlling the ferrite content.
采用流变学相反应法合成了掺杂La的纳米尺寸Zn(0.6)Cu(0.4)Cr(0.5)Fe(1.5 - x)La(x)O(4)（x = 0 - 0.06）铁氧体。通过原位聚合法制备了聚苯胺（PANI）/铁氧体纳米复合材料。利用X射线粉末衍射仪（XRD）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）、紫外可见光谱（UV）、热重分析（TGA）和振动样品磁强计（VSM）对铁氧体粉末和纳米复合材料的结构、形貌及铁磁性能进行了表征。结果表明，PANI与纳米尺寸的铁氧体粉末能够有效结合。聚合物在一定程度上可以减少纳米尺寸铁氧体颗粒的团聚，这有利于纳米颗粒的分散和稳定。施加磁场下的PANI/铁氧体纳米复合材料呈现出铁磁性质的磁滞回线。通过控制铁氧体含量来调整纳米复合材料的磁性能。
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