纳米聚苯胺在均相反应介质中的合成与导电性能研究

Preparation and Electric Properties of the Nano-polyaniline in the Homogeneous Reaction Medium

在丙酮、丁二酮水溶液中采用化学氧化法合成纳米聚苯胺,并研究有机溶剂的含量对纳米聚苯胺导电性能的影响。通过傅里叶变换红外光谱仪、紫外分光光度计、扫描电镜对其分子结构及微观形貌进行表征。两探针法测试结果表明,在丙酮水溶液中合成的纳米聚苯胺电导率从0.0295 S/cm(纯水介质)提高到0.5640 S/cm;表面电阻从201.28 Ω/cm(纯水介质)降至14.89 Ω/cm(丙酮体积分数为25%);在丁二酮水溶液中合成的纳米聚苯胺电导率提高至0.4590 S/cm;表面电阻降低至15.57Ω/cm(丁二酮体积分数为50%)。

The nano-polyaniline was synthesized through the chemical oxidation method in an aqueous solution of acetone or diacetyl, separately. The products were characterized using Fourier transform infrared, Ultraviolet-visible, and scanning electro microscope. Determination with two-probe method showed that, when the volume fraction of acetone was 25 %, the conductivity value of the nanopolyaniline increases from 0. 029 5 S/cm （in pure water） to 0. 564 0 S/cm while the value of the surface resistance decreases from 201.28Ω/cm （in pure water） to 14.89 Ω/cm. When the volume fraction of diacetyl was 50 %, the conductivity value of the nano-polyaniline increases to 0. 459 0 S/cm while the value of the surface resistance decreases to 15.57 Ω/cm.