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研究了在0.2 T的磁场作用下,采用微乳液法以十二烷基苯磺酸钠(SDBS)为乳化剂,过硫酸铵(APS)为氧化剂,大分子磺基水杨酸(SSA)为掺杂剂制备导电聚苯胺(PAn),并结合红外光谱、X射线衍射、粒径分析、电导率等手段对其结构及性能进行表征.结果显示:磁场作用可以提高PAn的电导率、掺杂度和腐蚀电位,但对PAn基本单元结构没有影响;与无磁场条件下合成的PAn相比,磁场条件下合成的PAn具有更高的结晶度和明显的微观取向结构,且反应时间从3 h减少到2 h,掺杂酸浓度(CSSA)从0.4 mol.L-1减小到0.3 mo.lL-1,乳化剂与苯胺单体的摩尔比(nSDBS/nAn)从0.6减少到0.45,PAn的电导率从0.85 S.cm-1增加到1.55 S.cm-1.
Under the action of a magnetic field of 0.2 T, the microemulsion method with SDBS as emulsifier and ammonium persulfate (APS) as oxidant, the macromolecular sulfosalicylic acid (SSA) as Doped polyaniline (PAn) was synthesized and its structure and properties were characterized by infrared spectroscopy, X-ray diffraction, particle size analysis and conductivity. The results show that the magnetic field can improve the conductivity, doping Degree and corrosion potential, but have no effect on the basic unit structure of PAn. Compared with PAn without magnetic field, PAn synthesized under magnetic field has higher crystallinity and obvious microstructure, and the reaction time is from 3 h The molar ratio of emulsifier to aniline monomer (nSDBS / nAn) decreased from 0.6 to 0.45 after decreasing the doping acid concentration (CSSA) from 0.4 mol.L-1 to 0.3 mol·L-1, The conductivity increased from 0.85 S.cm-1 to 1.55 S.cm-1.