聚苯胺/CoC2O4纳米复合物的制备与电磁性质

采用固相低热合成法制备了纳米草酸钴，再在不同条件下将聚苯胺原位生长在草酸钴表面从而获得兼具导电性和导磁性的聚苯胺/CoC₂O₄纳米复合物，考察了反应物配比、混合条件、活性剂的种类和数量对产物形貌结构及其电磁性质的影响。通过透射电镜(TEM)、X-射线衍射(XRD)、热重分析(TG)等手段表征了合成产物。结果表明，通过改变纳米CoC₂O₄与聚苯胺原位生长的复合条件可以有效调控产物的形貌结构及其电磁吸波性能，最佳实验结果为：超声作用下获得的聚苯胺/CoC₂O₄试样在8.6 GHz 处具有最大的反射损耗( -28.8 dB)，大于-10 dB的带宽达3.2 GHz。

Preparation and Electromagnetic Properties of PAn/CoC2O4 Nanocomposites

Polyaniline/CoC₂O₄ nanocomposite with both electrical and magnetic conductivity has been synthesized by using in-situ growth of polyaniline under different conditions on the surface of nano-cobalt oxalate, which was obtained by low heating solid state reaction. The influence of  reaction conditions including reactants ratio, mixing methods, type and quantity of surfactants on the morphology and structure and their electromagnetic properties of resulting composites was investigated. The products were characterized by TEM, XRD, and TG analysis techniques. The results indicate that the morphology and structure and their electromagnetic properties of nanocomposites can be effectively tuned by changing the in-situ complex conditions. The optimal experimental results were as follows: PAn/CoC₂O₄ nanocomposite obtained under ultrasonication showed a maximum reflection loss of -28.8 dB at 8.6 GHz with a bandwidth of 3.2 GHz above -10 dB loss.