PEDOT-PSS合成中薄膜的微结构变化与性能  

Microstructure Change and Properties in Process of Synthesis for PEDOT-PSS Film

作　　者：庞峰飞[1] 蔡奕康[1] 耿欣[1] 陈才[1] 韩国志[1,2] 

机构地区：[1]南京工业大学理学院应用化学系,南京210009 [2]东南大学分子电子学国家重点实验室,南京210096

出　　处：《功能高分子学报》2013年第3期217-222,共6页Journal of Functional Polymers

基　　金：中国博士后基金(20100481084);东南大学生物电子学国家重点实验室开放课题(20111218)

摘　　要：以3,4-乙烯二氧噻吩(EDOT)和聚苯乙烯磺酸钠盐(PSS-Na)为原料、过硫酸铵和硫酸铁为引发剂,通过化学氧化聚合法合成了聚3,4-乙烯二氧噻吩-聚苯乙烯磺酸(PEDOT-PSS)水分散体系,并对该体系的相稳定性进行了研究。在此基础上,重点研究了合成过程中PEDOT-PSS薄膜的微结构进化与导电性能的关系。结果表明:导电聚合物PEDOT-PSS水分散体系的相稳定性主要取决于合成中聚苯乙烯磺酸(PSS)与H2O的质量比(mPSS/mH2O)。当mPSS/mH2O<0.03时,形成的聚合物形貌均匀、稳定性较好。随着反应时间的增加,PEDOT-PSS薄膜的微结构形貌不断进化,从不连续的团簇状态向连续的多孔网络状态转变,导电性能也随之增加。但随着mPSS/mH2O的降低,聚合物薄膜最终表面电阻降低。Using 3,4 ethylenedioxythiophene （EDOT） and polystyrene sulfonate acid sodium salt （PSSNa） as raw materials, ammonium persulfate and ferric sulfate as initiator, conductive polymer of poly（3,4- ethylenedioxythiophene）-poly（styrenesulfonate） （PEDOT-PSS） aqueous dispersion was prepared by chemical oxidation polymerization method, and the phase stability of the system was studied. Then, the evolution of microstructures and corresponding conductive property were intensively researched. Results indicated that phase stability of PEDOT-PSS aqueous dispersion mainly depended on the mass ratio of poly（styrenesulfonate） （PSS） to H2O（mpss/mH2O）. When mpss/mH2O〈0. 03, the formed PEDOT-PSS aqueous dispersion had good phase stability with uniform appearance. With the reaction time increasing, microstruc ture of PEDOT-PSS film evolved from discontiguous clusters state to the continuous porous network, meanwhile the conductive performance was improved. However, the surface resistance of the final PEDOT-PSS film would decrease with the decreasing of mpss/mH2O.

关 键 词：导电聚合物 PEDOT—PSS 化学氧化聚合 微结构进化 

分 类 号：O6[理学—化学]