PEDOT-PSS的制备及性能研究_材料与化学工程.rar

摘要:摘  要:本课题以聚苯乙烯磺酸钠和聚苯乙烯磺酸为模板，过硫酸铵为氧化剂，Fe2(SO4)3为催化剂，采用模板聚合的方法制备不同比例的PEDOT：PSS分散体；再用不同型号的PVA，对聚合物进行改性。通过紫外（UV）、电化学测试系统（CV）、四探针，旋转粘度计，等对所有PEDOT：PSS的性能进行表征。四探针测试结果表明：模板添加比例为1：1时PEDOT：PSS的薄膜方块电阻约为150KΩ/□左右，模板添加比例增加时 PEDOT：PSS的方块电阻会有所上升。Na型模板（聚苯乙烯磺酸钠）的PEDOT：PSS的方块电阻值高于H型（聚苯乙烯磺酸）。PVA加入量在40%以下时，对PEDOT：PSS薄膜的导电性基本无影响。紫外吸收测试表明：PEDOT：PSS薄膜的可见光吸收率都小于10%，透明性非常好。随模板用量的增加，薄膜透明性增强。PVA的分子量，醇解度对薄膜的透明性影响不大。对不同PEDOT：PSS体系进行旋涂和成膜实验操做时得出结论：不同分子量的和醇解度的PVA对PEDOT：PSS分散体的成膜性能均有较明显的改善，随着PVA添加量的增加，成膜效果显著增加。旋转粘度计测试表明：体系的粘度随PVA的加入量的增加而线性增加，不同分子量和醇解度的PVA对体系粘度的影响基本相同。四探针测试结果表明，PVA的添加量在60%以下时，对PEDOT：PSS薄膜的导电性基本上没有影响。CV测试表明，添加PVA后 PEDOT：PSS的电化学活性和稳定性变差，PVA的分子量和醇解度对薄膜的电化学性能影响不大。

关键词：聚3,4-乙撑二氧噻吩(PEDOT)；苯乙烯磺酸钠（PSS）；聚苯乙烯磺酸（PSS）；导电聚合物；成膜性；电导率

Abstract:With polystyrene sulfonate and polystyrene sulfonic acid as the template, ammonium persulfate as the oxidant, ferric sulfate as the catalyst, PEDOT: PSS dispersions were prepared by the template polymerization. And then different types of PVA were doped in the dispersions in the different proportions to change the performances of it.The performances of PEDOT: PSS were by characterized by ultraviolet (UV), cyclic voltammetric curve (CV), the four-point probes , rotating viscometer. The results of four-point probes tests showed that when the adding ratio of the template was 1:1 the square resistance of PEDOT: PSS film was about 150 K Ω /□, the conductivity of it was very good. When the amount of the template increased , the square resistance of PEDOT: PSS would be increased. When the addition amount  of PVA under 40%, the conductivity of PEDOT: PSS films remained unchanged . Ultraviolet absorption tests showed that the visible light absorption rate of PEDOT: PSS films were less than 10%, the transparency of them were very good. With the increase of the amount of the template, the transparency of the films became better . The molecular weight of PVA, had little effect on the transparency of the films. Rotating viscometer tests showed that when the amount of PVA increased the viscosity of the system nearly remained unchanged.The molecular weight of the PVA nearly had no effect on the viscosity of the system. Four-point probes tests showed that when the amount of PVA added below 60%, the conductivity of the film nearly remained unchanged. CV tests show that, after PVA was added, the electrochemical activity and stability of PSS PEDOT: PSS became poorer, and the molecular weight of PVA had little effect on the the electrochemical activity and stability of PSS PEDOT: PSS.

Keywords：poly(3,4-ethylenedioxythiophene),sodium p-styrenesulfonate,polystyrenesulfonic acid, conducting polymer, film-forming property, conductivity