运用改进的溶胶凝胶-原位聚合法制备出了兼具电、磁性能的PANI/ZnFe2O4纳米复合材料,借助TEM、XRD、FTIR、四探针电导率仪和VSM(振动样品磁强计)等技术研究了复合材料的结构及其电磁性能.结果表明,通过该法可以实现ZnFe2O4与PANI的有机复合,制得纳米尺寸的、ZnFe2O4与PANI相间以化学键结合的纳米复合材料;复合材料兼具电、磁性能,其导电率随ZnFe2O4含量增加而降低,饱和磁化强度随之而升高,复合物的矫顽力在所研究的含量范围内均较纯ZnFe2O4大,且随ZnFe2O4含量的增加呈先升高后降低的变化趋势.此外,对ZnFe2O4进行HNO3预处理可以有效改善复合材料的电磁性能.%PANI/ZnFe2O4 nanocomposite materials with electromagnetic property were prepared with an improved sol-gel and in-situ polymerization process and characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform-infrared (FTIR) spectra, four-probe electrometer and vibrating sample magnetometer (VSM). The results indicated that PANI/ZnFe2O4 materials were nanosized and there was some strong interaction between ZnFe2O4 and PANI in the composite material. The material possessed both conductivity and magnetism. The conductivity decreased and the saturated magnetization (Ms) increased with the increasing ZnFe2O4 content. The coercive force (He) was higher than that of pure ZnFe2O4 nanopartieles and increased firstly and then decreased with the increasing ZnFe2O4 content. Moreover, the electromagnetic property of the materials could be effectively improved by pre-treating ZnFe2O4 nanopartieles with nitric acid solution.
展开▼
