碳纳米管/聚苯胺复合材料的制备及电性能

Preparation and Electrical Performance of Carbon Nanotubes/Polyaniline Nanocomposites

利用超声波将多壁碳纳米管(CNTs)分散于苯胺盐酸溶液体系中,以过硫酸铵((NH4)2S2O8)为氧化剂,原位聚合法制备碳纳米管/聚苯胺纳米复合材料(CNTs/PANI)。采用扫描电子显微镜(SEM)、傅立叶变换红外光谱(FT-IR)、四探针电导率测试仪对复合材料进行表面观察、结构测定和电性能表征。结果表明,复合材料为核-壳结构,碳纳米管和聚苯胺间存在相互作用,其电导率随碳纳米管含量的增加而增加。

The carbon nanotubes（CNTs） were dispersed the aniline HCl solution by ultrasonication. Using ammonium peroxydisulfate as oxidant carbon nanotubes/polyaniline nanocomposites （CNTs/PANI） were prepared by in-situ polymerization. Fourier transform infrared spectroscopic（FT-IR） and scanning electron microscope （SEM） confirmed the dispersion and the morphology of in water or matrix. The results show that the CNTs can be well-dispersed in water after purification. FT-IR spectra illustrates the presence of CNTs in the composites. The interaction between PANI and CNTs can be proved. The conductivity of the CNTs/PANI is increased with increasing the CNTs concentration.