超声辅助原位聚合聚吡咯/石墨烯纳米复合材料的制备及其性能研究

Study on Polypyrrole / Graphene Nanocomposite Prepared through In-Situ Polymerization Assisted by Ultrasonic Radiation

利用超声波的分散、粉碎、活化、引发等多重作用以及吡咯单体与石墨烯的π-π相互作用,在实现石墨烯均匀分散的同时,使吡咯单体在石墨烯表面进行原位聚合反应,制备出聚吡咯/石墨烯(PPy/RGO)纳米复合材料。运用扫描电子显微镜(SEM)、红外光谱(FTIR)、X射线光电子能谱(XPS)等测试手段对PPy/RGO纳米复合材料的表面特性、化学组成及结构等进行了表征。在此基础上,研究了制备过程中的各种因素(如氧化剂、反应温度、石墨烯含量等)对PPy/RGO纳米复合材料产率及导电性能的影响。并采用热重分析(TGA)和导电测试分析了石墨烯含量对其热稳定性及电导率的影响。

Taking advantages of the multiple effects of ultrasonic irradiation （ dispersion, pulverizing, activation and initiation）, graphene sheets were dispersed into nanoscale. Meanwhile, in-situ polymerization of pyrrole monomer on graphene surface was carried out. The high surface area in graphene and π-π interactions between aromatic structures of pyrrole and the basal plane of the graphene surface made the synthesized polypyrrole depositing on graphene surface. Polyprrole/graphene （PPy/RGO） nanocomposites were prepared. The surface property, chemical composition and structure of polyprrole/graphene （PPy/ RGO） nanocomposites were investigated by scanning electron microscope （SEM） , Fourier transform infrared spectroscopy （FTIR）, and X-ray photoelectron spectroscopy （XPS）. On these bases, effects of different factors during the process of PPy/RGO in-situ polymerization （such as oxidizer categories, oxidizer concentration, and temperature and RGO contents） on the productivity and electric properties of PPy/RGO were investigated. Thermal stability and conductivity of PPy/RGO nanocomposites with different RGO contents were also analyzed.