%0 Journal Article
%T Template Synthesis and Polymerization Mechanism of HPA/PANI Nanowire Arrays<br>模板合成H4PMo11VO40/聚苯胺纳米线列阵及其聚合机理探讨
%A YIN Guangming
%A DENG Qigang
%A BI Ye
%A YANG Wanli
%A Lü
%A Renjiang
%A ZHOU Derui
%A <br>殷广明
%A 邓启刚
%A 毕野
%A 杨万丽
%A 吕仁江
%A 周德瑞
%J 高分子学报
%D 2008
%I 
%X 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 bensoid cationic radicals,the formation of the PANI long chain results from coupling of two cationic radicals.The electron transfers from benzenoid ring segments to quinoid ring segments and further fabricates the model structure of tetracyclic anamorphosis of the benzenoid-type and quinoid-type in the chain structure of the PANI.The doping reaction undergoes in two steps,formation of the quinoid dimine cationic and their coupling with bensoid cationic radicals.
%K AAO Templates
%K H_4PMo_(11)VO_(40)
%K Polyaniline
%K Nanowire arrays
%K Polymerization mechanism<br>AAO模板
%K H4PMo11VO40
%K 聚苯胺
%K 纳米线列阵
%K 聚合机理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=15971983683C7643EE80F1CE621DEB60&aid=FA75768F70F66A700A7ADAD122295F21&yid=67289AFF6305E306&iid=94C357A881DFC066&sid=389DA78D878702A9&eid=E57FE519484CFB70&journal_id=1000-3304&journal_name=高分子学报&referenced_num=0&reference_num=21