聚吡咯与三氧化二铁复合材料制备与表征

为了得到导电高分子与含铁金属氧化物的复合材料，采用偶氮染料甲基橙为掺杂剂，利用一步法合成聚吡咯/三氧化二铁纳米复合材料，并通过扫描电镜, 傅立叶红外光谱, X射线衍射和四探针法对合成的聚吡咯/三氧化二铁复合材料的结构与微观形貌进行表征，研究了反应条件，主要是甲基橙与二价亚铁离子的用量对于聚吡咯/三氧化二铁复合材料性能与结构的影响.结果表明，在反应体系中引入甲基橙，有利于得到颗粒尺寸较小，粒径分布较均匀的聚吡咯/三氧化二铁复合材料；而且随着二价铁离子与三价铁离子的浓度比增大，所得到复合材料的粒子较大，堆积程度较低，电导率可以达到5.7 S/cm.表明可以通过这种一步法来调控聚吡咯/三氧化二铁复合材料的微观形貌与导电性能，使其在将来能应用在新型电磁功能器件上.

Synthesis and characterization of polypyrrole/ferric oxide composites

To prepare the composite of conducting polymer and ferrous compound, methyl orange was used as the dopant. Polypyrrole/ferric oxide composites were synthesized via one-step method. Fourier transform infrared spectroscope, scanning electron microscope, X-ray diffraction and four-point probe method test were carried out to characterize the structure, morphology and properties of the polypyrrole/ferric oxide composites. The effect of methyl orange and the content of ferrous ion on the composites were studied. The results show that the smaller polypyrrole/ferric oxide composites with more uniform distribution can be prepared with the addition of methyl orange in the reaction;with the increase of the concentration ratio of ferrous ion and ferric ion, the composites with bigger size are obtained and packed more closely,and the conductivity of the composite is about 5.7 S/cm. It indicates that the morphology and property of polypyrrole/ferric oxide composites can be controlled via this one-step method and these polypyrrole/ferric oxide composites could be used in the fabrication of functional devices in future.