磺基水杨酸掺杂导电聚苯胺纳米材料的制备与性能研究

采用化学氧化法以苯胺为单体,过硫酸铵为氧化剂,磺基水杨酸为掺杂酸合成聚苯胺纳米棒导电材料。考察了单体/掺杂酸摩尔比对聚苯胺形貌与电性能的影响,采用傅里叶红外光谱,XRD粉末衍射表征聚苯胺结构;电化学工作站、四探针研究表明聚苯胺的导电性随掺杂酸/单体摩尔比的增大而增大,单体/掺杂酸摩尔比为2时电导率为1.43S/cm;SEM、TEM表明聚苯胺纳米棒表面粗糙,直径约为100～200nm,长度约为400～700nm,表面附着了1层10～30nm厚的颗粒;并提出了纳米棒可能的形成机理。

Preparation and electrochemical properties of polyaniline nanorods doped with sulfosalicylic acid

Polyaniline nanorods doped with sulfosalicylic acid were prepared by chemical oxidization polymerization with aniline as monomer and ammonium persulfate as oxidant.The influence of mono mer/dopant mole ratio on the electrochemical properties and morphology of synthesized polyaniline.The structure of polyaniline was characterized and studied by FT-IR spectrometric and XRD analysis.Four-point and electrochemical system analysis show that conductivity of polianiline nanorod increase as the increasement of dopant/monomer mole ratio and it reached to 1.43S/cm as the dopant/monomer mole ratio is 0.5.SEM and TEM images indicate that typical nanorods are rough with diameter of about 100-200nm and length of about 400-700nm,respectively.Small 10-30nm granular nanoparticles appear to agglomerate onto the available nanorod surface.At last,the probable formation mechanism of polyaniline nanorod is proposed.