γ射线辐射下制备聚苯胺／银纳米复合材料及其输运性质

Fabrication of Polyaniline/Silver Nanocomposite Under Gamma-ray Irradiation

在γ射线辐射下，采用一步法制备了聚苯胺／银复合材料，通过红外光谱、紫外-可见光光谱、X射线衍射分析表明，所制备的样品由聚苯胺和面心立方相的银组成．反应机理研究表明，聚苯胺是通过苯胺阳离子与OH反应生成的苯胺阳离子自由基之间的反应生成的，银是通过银Ag＋与eaq的反应生成的．扫描电子显微镜和透射电子显微镜显示聚苯胺／银复合物呈纳米纤维和纳米颗粒的形貌，这种形貌可能是由于类似“快速混合”聚合反应的过程造成的．在80-300K，聚苯胺／银复合材料的输运行为可较好地符合变程跃迁模型，而在80K以下，则明显地偏离变程跃迁模型．

Polyaniline （PANI）/silver composite was one-step synthesized under γ-ray irradiation. The structure of the composite was characterized by Fourier transform infrared spectroscopy, UV-Visible, and X-ray diffraction, which indicated that PANI and face-centered-cubic silver were synthesized under γ-ray irradiation. The reaction mechanism were discussed, which revealed that the PANI was formed by the reaction of aniline cation radicals formed by the reaction of aniline cation and -OH, and Ag was formed by the reaction of Ag＋ and eaq. The morphology of the composite consisted of PANI nanofibers and Ag nanoparticles, and the mechanism of the morphology formation was discussed, which revealed that the rapid mixing like polymerization process might play an important role. It was revealed that the transport behavior of the composite well fitted with the variable-range-hopping model in 80-300 K and deviated from the model below 80 K.