先采用反向共沉淀法制备了钴铁氧体(CoFe2O4)磁性纳米颗粒,并以此为核,基于离子液体(IL)环境下,以苯胺为单体,运用原位聚合和化学氧化聚合法制备得到了既具有电性能又具有磁性能的钴铁氧体/酸掺杂聚苯胺——PANI/CoFe2O4(IL)复合材料.通过透射电镜(TEM)、X射线衍射分析(XRD)、红外波谱分析(FT-IR)、振动样品磁强计(VSM)和四探针电导率仪等测试手段研究了该复合材料的结构和性质,结果表明:本文实验条件下,制备得到的 CoFe2O4具有单一的尖晶石型铁氧体结构,且分散性较好,IL 存在的反应条件对其晶型没有影响;含相同量钴铁氧体(0.3g CoFe2O4)时,在IL和水相中制备的PANI/CoFe2O4复合材料的电导率分别为1.0S/cm和0.4S/cm,而饱和磁强度则分别为19.8emu/g和22.9emu/g.此外,IL下得到的复合材料表现出较好的电包磁结构.%Cobalt ferrite magnetic nanoparticles was prepared using a reverse coprecipitation method in this paper. Then polyaniline/CoFe2O4 electromagnetic nanocomposites were successfully synthesized using 1-methyl-3-alkylcarboxylic acid imidazolium ionic liquids as synthetic environment byin situ polymerization and chemical oxidative polymerization of aniline molecule on CoFe2O4 nanoparticles. The properties and structures of the composites were characterized by using transmission electron microscopy (TEM),X-ray diffraction (XRD),Fourier transform infrared (FT-IR),vibrating sample magnetometer (VSM) and four-point probe resistivity instrument. The results showed that obtained cobalt ferrite nano-particles have a cubic spinel ferrite type structure and were dispersed uniformly. The ionic liquids have no influence on the formation of the spinel type lattice. When the same amount of CoFe2O4 (0.3g) was added,the conductivity of PANI/CoFe2O4 composites prepared in IL and water were 1.0S/cm and 0.4S/cm,and the saturated magnetizations were 19.8emu/g and 22.9emu/g, respectively. Besides,the composites performed a good structure of magnetic nanoparticles coated by conductive PANI when it was prepared in IL.
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