纳米结构苯胺/吡咯共聚物的静态法合成及自组装

采用静态聚合法,以过硫酸铵为氧化剂,使苯胺与吡咯进行共聚,制备了高产率(88%)的纳米结构苯胺/吡咯(PANPY)共聚物。研究结果发现,苯胺/吡咯摩尔比和聚合介质对共聚物的形貌有重大影响。以1.0 mol/L盐酸溶液为介质,苯胺/吡咯摩尔比为90/10时,可制得直径为70 nm～90 nm、长为1.3μm的共聚物纳米纤维;苯胺/吡咯摩尔比为50/50时,得到平均粒径约为400 nm的杨梅球状共聚物颗粒,透射电子显微镜的结果表明这些杨梅球状共聚物颗粒是由直径为5nm,长25nm的共聚物微小纳米纤维自组装而成。而以0.1 mol/L NaOH水溶液为反应介质,则可以得到外直径为1.8μm～2.6μm的自组装共聚物微球。

Synthesis and Self-Assembly of Nanostructural Copolymer from Aniline with Pyrrole via Unstirred Polymerization

Nanostructural poly(aniline-co-pyrrole)(PANPY) copolymers with a high yield(88%) were synthesized by unstirred polymerization of aniline(AN) and pyrrole(PY) with ammonium peroxydisulfate as an oxidant.It is found that the morphologies of the copolymer strongly depend on the aniline/pyrrole molar ratio and polymerization medium species.PANPY(90/10) copolymer nanofibers in diameters of 70～90 nm and lengths of 1.3μm were prepared in 1.0 mol/L HCl at 0℃for 24 h,whereas PANPY(50/50) copolymer waxberry-like spheres (400nm in diameter) were produced during the polymerization in 1.0 mol/L HCl at 0℃for 24 h.Transmission electron microscopy(TEM) image reveals that the PANPY(50/50) copolymer waxberry-like spheres are constructed with their own nanofibers by self-assembly process.While the PAN/PY(90/10) copolymer self-assembled microspheres(1.8μm～2.6μm in outer diameter) were obtained by changing the reaction medium from 1.0 mol/L HCl to 0.1 mol/L NaOH.