【摘要】 聚苯胺(polyaniline,PANI)磺化后,可显著提高水溶加工性,具有重要工业应用价值,目前的关键是如何获得高导电性的磺化聚苯胺(sulfonatedpolyaniline,SPAN)。本文以多壁碳纳米管(MWCNTs)作为导电添加剂,草酸作为掺杂剂,采用溶液中的化学氧化聚合法制得了具有核-壳结构的聚苯胺(PANI)包覆多壁碳纳米管(MWCNT)复合材料后,再对其进行氯磺化,得到了具有良好导电性的SPAN包覆MWCNT复合材料。紫外-可见光谱研究发现,MWCNT与SPAN之间存在着静电相互作用,稳定了SPAN分子链中的共轭作用,增强了共轭长度。性能测试表明该复合材料的电导率可达到4.45S/cm,比相同方法制备的SPAN高出约5个数量级;在水溶液中的溶解度约为1mg/mL,采用过滤的方法获得了一层均匀且光滑的黑色薄膜,表明其具有优异的成膜性。更多还原

【Abstract】 The sulfonated polyaniline (SPAN) with good solubility and processibility has many potential applications in industry.A large hurdle is how to improve its electrical properties.In this paper,multi-walled carbon nanotubes (MWCNTs) were used as conductive fillers to improve the conductivity of SPAN.The highly conductive SPAN/MWCNT composites were prepared by chemical oxidation polymerization using oxalic acid as dopant and then sulfonating with chlorosufonic acid.The UV-Vis spectrum of the composite demonstrates that electrostatic interaction exists between MWCNTs and SPAN molecular chain,which might increase the conjugation length of SPAN.The composite has a good conductivity of 4.45 S/cm,which is nearly 5 orders of magnitude higher than sulfonated polyaniline (SPAN) obtained by the same chemical oxidation polymerization method.The composite has good water solubility of 1 mg/mL and can form uniform and glazed film through vacuum filtration.更多还原