PANI/PVA共混薄膜的制备与表征

摘要

将单体苯胺与掺杂剂十二烷基苯磺酸混合,再进行氧化聚合反应得到聚苯胺乳液.用匀胶机将聚苯胺乳液旋涂成膜,并采用扫描电子显微镜(SEM)、傅氏转换红外线光谱分析仪(FTIR)、电化学工作站等方法对聚苯胺共混薄膜进行结构和性能的表征.结果表明:聚苯胺共混薄膜表面结构完整,且膜表面聚苯胺颗粒分散性好,PANI/PVA混合材料的导电性能和电致变色性能受合成参数的影响,当nDBSA/nAN=1.03时,聚苯胺共混薄膜的导电率达1.28 S/cm,可用作电致变色材料;膜具有良好的热稳定性能,其分解温度为301℃左右.%The initial solution is constituted mainly by the monomer aniline mixed with dopant dodecylbenzene sulfonic acid,then PANI emulsion is achieved by oxidation polymerization reaction.Polyaniline (PANI) membrane is coated by the KW-4A spin coater,and the structure and performance of PANI blend membrane are characterized by the scanning electron microscope (SEM),Fourier transform infrared spectroscopy meter (FTIR) and electrochemical workstation.The results indicate that polyaniline blend membrane surface structure is complete and PANI particles can be dispersed evenly in the PVA (Polyvinyl alcohol) matrix; the conductivity and electrochemical properties of the PANI/PVA composites can be affected by synthesis parameters.When nDBSA/nAN =1.03 under the same condition,the conductivity of polyaniline membrane is up to 1.28 S/cm with the best electrochromic performance,the thermal stability,and the decomposition temperature of 301℃,which is very suitable as the electrochromic material.