【摘要】 以十六烷基三甲基溴化铵(CTAB)为软模板、磷酸为掺杂剂、过硫酸铵为氧化剂，采用化学氧化法合成聚吡咯(PPy)纳米线，分别采用X射线衍射仪、扫描电镜和网络矢量分析仪对PPy纳米线的结构、形貌、介电性能和微波吸收性能进行研究。结果表明：合成的PPy纳米线形貌较规整，直径约为60～90nm;阳离子表面活性剂CTAB在水中形成的胶束成为合成PPy纳米线的软模板，聚合过程受到胶束形貌的诱导控制；形貌规整的纳米线在5～20GHz频率范围内，随着频率的增大，复介电常数ε的实部ε′值总体呈下降趋势，虚部ε″值则总体先增加后降低，在12.3GHz处达到最大值6.98;厚3mm的PPy纳米线涂层在5～20GHz频段内反射损耗均低于-7.27dB,在12.6GHz处达到最小值-10.95dB,表现出较好的宽频吸收特性。更多还原

【Abstract】 Polypyrrole(PPy)nanowires were prepared by chemical oxidative polymerization method using cetyltrimethylammounium bromide(CTAB)as the soft templates, phosphonic acid as the dopant and ammonium persulfate as the oxidant.The structural characteristics, morphology, dielectric properties and wave absorbing properties of PPy nanowires were analyzed by X-ray diffraction, scanning electron microscope and network analyzer, respectively.The results indicated that PPy nanowires were well defined with an uniform diameter of 60～90 nm.The micelles formed by cationic surfactant CTAB in water became the soft template for the synthesis of PPy nanowires.The polymerization process was controlled by the induction of micelle morphology.The ε′ values decreased with increasing frequency in the range of 5～20 GHz.But the ε″ values increased firstly and decreased then.It was observed that the ε″ values got the maximum value 6.98 at 12.3 GHz.The reflection loss of PPy nanowires for 3 mm arrived at a minimum value of-10.95 dB at 12.6 GHz.Its reflection loss was below-7.27 dB in the frequency range of 5～20 GHz which showed better broadband absorbing properties.更多还原