无机化学学报

兼具电磁性能的PANI/ZnFe₂O₄纳米复合材料的制备

Preparation of PANI/ZnFe₂O₄ Nanocomposite Materials with Electromagnetic Property

作者	单位
费鹏	西北师范大学化学化工学院，生态环境相关高分子材料教育部重点实验室，甘肃省高分子材料重点实验室，兰州 730070
方燕	甘肃省分析测试中心，兰州 730070
苏碧桃	西北师范大学化学化工学院，生态环境相关高分子材料教育部重点实验室，甘肃省高分子材料重点实验室，兰州 730070
雷自强	西北师范大学化学化工学院，生态环境相关高分子材料教育部重点实验室，甘肃省高分子材料重点实验室，兰州 730070

摘要: 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。

关键词: ZnFe₂O₄ PANI 纳米复合材料电磁性能制备

基金项目:

Abstract: 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 (Hc) was higher than that of pure ZnFe₂O₄ nanoparticles 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 nanoparticles with nitric acid solution.

Keywords: ZnFe₂O₄ PANI nanocomposite material electromagnetic property preparation

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费鹏,方燕,苏碧桃,雷自强.兼具电磁性能的PANI/ZnFe₂O₄纳米复合材料的制备[J].无机化学学报,2011,27(7):1329-1333.

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