Polypyrrole (PPy) nanotubes with different diameters have been successfully prepared by different concentrations of oxidant with methyl orange (MO) as template. When the molar ratio of oxidant to pyrrole monomer was 1.5:1, PPy-1.5:1 nanotubes with smooth surface and diameter of 40–60 nm were obtained. The large crystallization orientations of molecular chains in PPy nanotubes due to the template effect of MO significantly enhance π-π interactions, which improves electrical conductivity of PPy-1.5:1 nanotubes. The great degree of conjugation and the small conjugate defect of the molecular chains in PPy-1.5:1 also contribute to high mobility of carriers and high electrical conductivity. The hollow structures introduced to PPy bring about appropriate grain boundary defects and benefit seebeck coefficient of PPy nanotubes. Enhancement of electrical conductivity and seebeck coefficient of the PPy-1.5:1 nanotubes result in the maximization of power factor of 0.55 µWm⁻¹K⁻², about 22 orders of magnitude higher than PPy particles prepared under the same condition. By designing and tailoring the polymer structure, nano-structured PPy with high thermoelectric properties are highly expected.

以甲基橙（MO）为模板，通过不同浓度的氧化剂，成功制备了直径不同的聚吡咯（PPy）纳米管。当氧化剂与吡咯单体的摩尔比为1.5：1时，可获得表面光滑且直径为40-60 nm的PPy-1.5：1纳米管。由于MO的模板效应，PPy纳米管中分子链的大结晶取向显着增强了π-π相互作用，从而改善了PPy-1.5：1纳米管的电导率。PPy-1.5：1中分子链的高度共轭度和小共轭缺陷也有助于载流子的高迁移率和高电导率。引入PPy的中空结构会引起适当的晶界缺陷，并有利于PPy纳米管的塞贝克系数。^-1 K ^-2，比在相同条件下制备的PPy颗粒高约22个数量级。通过设计和定制聚合物结构，高度期望具有高热电性能的纳米结构的PPy。