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开发了反胶束模板-原位聚合纳米复合法制备聚苯胺(PANI)/Ce(OH)3-Pr2O3.3H2O/石墨纳米薄片(NanoG)纳米复合材料的方法。膨胀石墨在乙醇水溶液中经超声处理制得石墨纳米薄片,以苯胺的氯仿溶液为油相,稀土金属离子Pr3+、Ce3+水溶液为水相,依靠表面活性剂十六烷基三甲基溴化铵(CTAB)自组装形成的反胶束为模板,制备PANI/Ce(OH)3-Pr2O3.3H2O/NanoG复合材料。利用红外光谱(FTIR)、扫描电镜(SEM)、透射电镜(TEM)和X-射线衍射(XRD)对该复合材料进行了表征和分析,研究了其导电性能和热性能。结果表明,PANI/Ce(OH)3-Pr2O3.3H2O/NanoG复合材料各相分散均匀,稀土纳米粒子在体系中以棒状的形态分布。热重分析表明,该复合材料的热稳定性明显提高;导电性研究说明,石墨纳米薄片的特殊的结构(较大的径厚比)对其在聚合物基体中形成导电网络具有重要作用;PANI/Pr2O3-Ce(OH)3/NanoG纳米复合材料的渗滤阀值低于1.0wt%。
A reverse micelle template-in situ polymerization nanocomposite method for the preparation of polyaniline (PANI) / Ce (OH) 3-Pr2O3.3H2O / graphite nanosheet (NanoG) nanocomposites was developed. Graphite nanoflakes were obtained by ultrasonic treatment of expanded graphite in ethanol aqueous solution. The aniline chloroform solution was used as the oil phase. The rare earth metal ions Pr3 + and Ce3 + aqueous solution were used as the aqueous phase. The surfactant was cetyltrimethylammonium bromide CTAB) self-assembled reverse micelles as template to prepare PANI / Ce (OH) 3-Pr2O3.3H2O / NanoG composites. The composites were characterized and analyzed by FTIR, SEM, TEM and XRD. The electrical and thermal properties of the composites were investigated. The results showed that the phases of PANI / Ce (OH) 3-Pr2O3.3H2O / NanoG composites were uniformly dispersed, and the rare earth nanoparticles were distributed in a rod-like morphology. Thermogravimetric analysis shows that the thermal stability of the composites is obviously improved. The conductivity study shows that the special structure (larger aspect ratio) of graphite nanosheet plays an important role in the formation of conductive network in the polymer matrix. PANI / Pr2O3-Ce (OH) 3 / NanoG nano-composite infiltration threshold of less than 1.0wt%.