太原理工大学学报2017，Vol.48Issue(4)：563-569,7.DOI:10.16355/j.cnki.issn1007-9432tyut.2017.04.009
化学氧化法制备条件对聚噻吩导电性能的影响
Influence of Preparation Conditions of Chemical Oxidative Polymerization on the Conductivity of Polythiophenes
摘要
Abstract
Polythiophenes were prepared by chemical oxidative polymerization under the conditions of different reaction time t (1 ～ 12 h),temperature θ (-32～0 ℃),molar ratio of oxidant to thiophene n(FeCl3)/n(Th) =2～5,thiophene concentration c (Th) =0.05 ～ 0.20 mol/L.The structure and conductivity of the polythiophenes were characterized using Fourier transform infrared spectroscopy,ultraviolet and visible diffuse reflectance spectroscopy and megohmmeter.The results indicate that these preparation conditions could greatly affect the structure and conductivity of polythiophenes.The conductivity of polythiophene increase from 10-13 to 10-8 S/m with the increase of thiophene concentration from 0.05 to 0.20 mol/L.The highest conductivity of polythiophene at different reaction time is 10-10 S/m when the reaction time is 3 h.The conductivity of the polythiophenes prepared at different temperatures is all at 10-13 S/m level.When the n (FeCl3)/n(Th)increases from 2 to 5,the conductivity of samples increases from 10-13 to 10-10 S/m.The conductivity of the sample prepared by the treatment of direct filtration and washing increases 5 orders of magnitude over that prepared by the treatment of solvent volatilization at room temperature followed by filtration and washing.From the aspect of the balance of conductivity and cost,the optimized reaction conditions are:c(Th)=0.1 mol/L,t=3 h,θ =0 ℃,n(FeCl3)/n(Th) =2,and using direct filtration treatment on the products.Moreover,the optimized conductivity of the polythiophene is 2.49 × 10-8 S/m.关键词
化学氧化聚合法/聚噻吩/电导率/聚合度/连接方式Key words
chemical oxidative polymerization/polythiophene/conductivity/degree of polymerization/connection manner of thiophene分类
通用工业技术引用本文复制引用
王亚杉,廖俊杰,韩鹏月,常丽萍,鲍卫仁..化学氧化法制备条件对聚噻吩导电性能的影响[J].太原理工大学学报,2017,48(4):563-569,7.基金项目
国家自然科学基金资助项目:吸附剂表面修饰和结构调变对焦化苯中噻吩深度脱除的影响及其再利用研究(51372161),吸附剂的表面化学特性对深度脱除汽油中噻吩类含硫化合物的影响及吸附机理研究(21406151) （51372161）
