二次掺杂态聚苯胺的制备与性能研究

Study on Preparation and Properties of Secondary Doped Polyaniline

为了研究二次掺杂聚苯胺(PANI)中掺杂剂的掺杂行为,本文采用化学氧化法制得盐酸掺杂的聚苯胺,经脱掺杂后,用樟脑磺酸(CSA)进行二次掺杂.通过改变CSA的加入量,考察了掺杂剂及其用量对聚苯胺结构和导电性能的影响.分别采用傅立叶变换红外(FT-IR)光谱仪和四探针电导率测试仪对掺杂后聚苯胺的结构和电导率进行了表征.结果表明:与本征态聚苯胺相比,CSA掺杂聚苯胺由于诱导和共轭效应使得其红外吸收峰向低波数方向移动.随掺杂剂CSA用量的增加,聚苯胺的电导率先增大后减小;当CSA与PANI的质量比为3.49∶1时,聚苯胺的电导率最大,达到2.22S·cm^(-1).之后,随着CSA加入量的继续增大,其电导率逐渐降低.

The paper studies the doping behaviors of dopants in doped polyaniline （PANI ） .The hydrochloric acid-doped polyaniline was prepared by chemical oxidative polymerization .After being dedoped ,PANI was doped with camphor sulfonic acid （CSA） the second time .By changing the amount of CSA ,the effects of doping agent and its amount on the structure and conductivity of PANI were investigated .The structure and electrical conductivity of the doped PANI were characterized by using Fourier Transform Infrared （FT-IR ） Spectrometer and Four-Point Probe Conductivity Tester , respectively .The results show that ,compared with the intrinsic PANI ,the infrared absorption peaks of the CSA-doped PANI shift to the lower wavenumber because of the inductive and conjugated effect .In addition ,with the increase in the amount of CSA ,the conductivity of PANI increases at first and then decreases .When the mass ratio of CSA to PANI is 3 .49 ∶ 1 ,the conductivity of PANI reaches the maximum （2 .22 S ＆#183; cm -1 ） .Thereafter ,with the amount of CSA increasing ,its conductivity decreases gradually .