模板合成H4PMo11VO40／聚苯胺纳米线列阵及其聚合机理探讨  

TEMPLATE SYNTHESIS AND POLYMERIZATION MECHANISM OF HPA/PANI NANOWIRE ARRAYS

作　　者：殷广明[1] 邓启刚[1] 毕野[1] 杨万丽[1] 吕仁江[1] 周德瑞[2] 

机构地区：[1]齐齐哈尔大学化工学院,齐齐哈尔161006 [2]哈尔滨工业大学应用化学系,哈尔滨150001

出　　处：《高分子学报》2008年第5期430-434,共5页Acta Polymerica Sinica

摘　　要：在氧化铝模板中制备了HPA/PANI纳米线列阵,SEM、TEM表明列阵中纳米线直径约为80 nm;XRD与FT-IR证明形成了有效掺杂;单根纳米线的导电率为16.2 S.cm-1;材料的TG-DTA表明PANI纳米线材料有三步失重过程,失去吸附水过程,多酸失去结晶水和PANI结构持续分解过程,多酸结构分解过程;在氧化聚合过程中H4PMo11VO40即为质子酸又为氧化剂和掺杂剂;聚合反应采用自由基机理进行,掺杂反应发生在形成醌二亚胺式自由基正离子和双苯胺式自由基正离子和醌二亚胺式自由基正离子偶联聚合成链结构时.By the synthetic method of chemical oxidative polymerization, conducting polyaniline （PANI） doped with vanadium-containing molybdicacid （HPA） had been prepared by template synthesis within porous anodic aluminum oxide （AAO）.The porous anodic aluminum oxide membranes were immersed in the aniline monomer solution, and a vacuum was kept until no air bubble gave off in the AAO templates ; in this case, the template channels were full of the aniline monomer, the HPA solution was dropped into aniline solution, and reaction was initiated inside the channels to form one-dimensional nanostructures PANI. The nanowires of the PANI were characterized by Fourier transform infrared spectroscopy （FT-IR）, the X-ray diffraction （XRD）, the scanning electron microscopy （SEM） and the transmission electron microscopy （TEM）. The XRD and FT-IR spectra analysis provides evidence for the HPA/ PANI that the PANI could be effectively doped by the HPA, and the HPA existed with molecular state in the materials,and the materials are of non-crystalline structure. The surface morphology of the HPA/PANI nanowire arrays was observed by using scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The SEM and TEM information show that the PANI nanowires are about 80 nm in diameter. Furthermore, the thermal stability and the conductivity of doped PANI were also determined. The materials have three steps in the thermal analysis,losing adsorbed water process, losing crystalline water of the HPA structure and continous decomposition process of the PANI structure and HPA structure decomposition process. The conductivity of the HPA/PANI was determined to be 16.2 S·cm^-1. In the polymerization process, the HPA not only acts as protonic acid, but also oxidant and dopant. The polymerization follows a radical mechanism：In the first the aniline is protonated by HPA, and then HPA further oxidates aniline cationic radicals. The aniline is induced to generate the quinoid dimine cationic radicals and

关 键 词：AAO模板 H4PMo11 VO40 聚苯胺 纳米线列阵 聚合机理 

分 类 号：O633.2[理学—高分子化学]