导电聚苯胺/聚醋酸乙烯酯复合膜的合成及特征

Synthesis and Characteristics of Conductive Composite Film from Polyaniline and Polyvinyl Acetate

以过硫酸铵为氧化剂，盐酸为掺杂剂，采用原位氧化聚合法合成了聚苯胺（ＰＡｎ）／聚醋酸乙烯酯（ＰＶＡｃ）复合材料，通过溶液浇铸的方法制成了性能优良的可溶性导电自支撑复合膜，电导率达到１０－２Ｓ·ｃｍ－１；考察各种反应条件对复合膜电导率的影响，获得了最佳聚合反应条件．用扫描电镜和红外光谱对导电复合膜的表面形态及组成进行表征，并进行了环境稳定性的测试．

Conductive composite materials of polyaniline (PAn)/polyvinyl acetate (PVAc) was synthesized by in situ chemical oxidative polymerization of aniline in aqueous PVAc solution by using ammonium persulfate as oxidative agent and hydrochloric acid as dopant. The free standing compositive film was made through the evaporation of N methylpyrrolidone. The electric conductivity of the film reached up to 10 -2 S·cm -1 measured by standard four probe method. The conditions of synthesis were discussed, and a proper polymerization condition was obtained. The structure and component of composites were characterized by SEM and IR spectrum, and the stability of the film was discussed as well.