木质素磺酸钠掺杂聚(3,4-乙撑二氧噻吩)水分散性复合材料的制备和表征

Preparation and characterization of water-dispersed conductive PEDOT composites doped with lignosulfonate

在水性介质中,以可再生资源木质素磺酸钠作为新型掺杂剂和软模板,采用化学氧化聚合法制备了在水中稳定分散的聚(3,4-乙撑二氧噻吩)—木质素磺酸复合材料。采用红外光谱、紫外-可见吸收光谱、TGA、SEM以及电导率仪对其性能进行了相关测试和表征。结果表明:所制备的材料呈现管状或纤维状的微观构型,当木质素磺酸钠与3,4-乙撑二氧噻吩单体的质量比为1.5∶1时,所制备的复合材料室温电导率可达1.15·10-3 S/cm,并具有热稳定性和分散稳定性好等优点,该材料在抗静电涂层和生物医用导电高分子领域具有潜在的应用前景。

The water-dispersed conductive PEDOT composites were prepared via the chemical oxidative polymerization with lignosulfonate（LGS） which was a renewable resource and used as a novel dopant and soft template in aqueous medium. The properties were characterized by fourier transform infrared（FTIR）, UV - Vis, thermogravimetric analysis （TGA）, scanning electron microscopy（SEM） and electric conductivity, respectively. The tubular or fiber structure was observed from SEM. The four probe conductivity measurement suggested that the high conductivity of the composites was obtained about 1. 15 · 10^-3 S/cm. The composites also had advantages of good thermal and dispersion stability, which showed potential application prospects in the field of antistatic coating and biomedical conducting polymer..