电化学法聚吡咯/碳纳米管复合膜的制备与表征

Electrochemical preparation and characterization of polypyrrole/CNTs films

以对甲苯磺酸(PTSA)为掺杂剂、碳纳米管(CNTs)为增强相通过电化学恒电位法在不锈钢电极表面合成聚吡咯/碳纳米管(PPy/CNTs)复合膜。采用扫描电镜(SEM)和四探针测试仪对PPy/CNTs膜的微观形貌和电导率进行表征。通过交流阻抗谱(EIS)、循环伏安法(CV)研究了PPy/CNTs膜的电化学行为。系统研究了聚合电位、聚合时间、PTSA浓度、CNTs浓度以及吡咯(Py)浓度对PPy/CNTs膜的形貌、厚度以及电导率的影响。结果表明:在0.60～0.90V聚合电位之间PPy/CNTs膜成膜性好且容易从不锈钢电极表面剥离。聚合电位、聚合时间对PPy/CNTs膜的厚度、形貌和电导率均有较大影响,当Py∶PTSA∶CNTs为1.57∶1.97∶1.41,聚合电位为0.75V,聚合时间为1000s时,合成的PPy/CNTs膜电导率最高为33.14S.cm-1。

PPy/CNTs films were synthesized by potentiolstatic method on stainless steel by using P-toluenesulfonic acid（PTSA） as dopant.The analysis of morphology and conductivity of PPy/CNTs films were performed by scanning electron microscope（SEM） and four-probe instrument.Electrochemical behavior of PPy/CNTs films was studied by cyclic voltammetry（CV） and electrochemical impedance spectroscopy（EIS）.The influence of polymerization potential,polymerization time,concentration of PTSA,CNTs and Py on morphology,thickness and conductivity of PPy/CNTs flims were investigated.It showed that PPy/CNTs films were easy to peel from the stainless steel when the potential range was from 0.6V^0.9V.Thickness,morphology and conductivity of PPy/CNTs films were greatly affected by polymerization potential,polymerization time.The conductivity of the film was the highest which was 33.14S·cm-1 when Py∶PTSA∶CNTs was 1.57∶1.97∶1.41,the polymerization potential was 0.75 V and the polymerization time was 1000s.