PAPy/MWNTs复合材料的制备及其导电性能研究

通过原位化学氧化聚合法制备了聚3-乙酰基吡咯(PAPy)/多壁碳纳米管(MWNTs)复合材料。利用FT-IR、1 H-NMR、XRD、FE-SEM、FE-TEM、TGA等方法对单体和复合材料进行了结构和性能表征。红外光谱显示PAPy与MWNTs间并没有发生化学反应,MWNTs仅作为3-乙酰基吡咯(APy)单体聚合的模板。FE-SEM与FE-TEM分析表明,PAPy仅涂覆在MWNTs的外表面,涂覆厚度取决于APy与MWNTs间的质量比。热重分析表明,MWNTs可以提高PAPy/MWNTs复合材料的热稳定性。利用四探针法对样品进行了电导率测试,发现通过MWNTs与PAPy复合,可以显著地提高复合材料的导电性,并通过控制投料比,可以使复合材料的电导率接近MWNTs的电导率。

Preparation and electrical properties of PAPy/MWNTs composites

Conducting poly(3-acetylpyrrole)(PAPy)/multi-wall carbon nanotubes(MWNTs) composites were synthesized by the in situ chemical polymerization of 3-acetylpyrrole(APy) on MWNTs.The structure and properties of the resulting PAPy-MWNTs composites was studied by FT-IR,XRD,FE-SEM,FE-TEM and TGA.FT-IR results indicated that no chemical reaction occurred between the PAPy and MWNTs,and only the MWNTs served as a template for APy polymerization.FE-SEM and TEM studies suggested that PAPy was only coated on the surface of carbon nanotubes and the thickness of the PAPy coating on each nanotube depended on the feed ratio of APy to MWNTs.TGA indicated that the MWNTs can improve the thermal stability of PAPy/MWNTs composites.In addition,the standard four probe method was used to measure the electrical conductivity of the samples at room temperature,and the results exhibited the electrical conductivity of PAPy/MWNTs composites can near that of MWNTs by controlling the mass ratio between APy and MWNTs.