导电聚苯胺/纳米Fe_3O_4复合材料的制备及耐热性研究

Synthesis and Thermal Stability of Composite of Conducting Polyaniline with Fe_3O_4 Nanoparticles

采用原位聚合法制备了烷基苯磺酸掺杂的导电聚苯胺与纳米Fe3O4复合材料,并对纳米Fe3O4进行了XRD表征,经粉体激光粒度分布测试表明分散剂的存在能较好地保持纳米粉的分散。研究发现复合材料与导电聚苯胺比较,其热分解温度提高了100℃以上,而且分解速率大大下降,这主要是由于纳米Fe3O4粒子对烷基苯磺酸掺杂剂有强烈的表面吸附作用。

The composite of conducting polyaniline with Fe3O4 nanoparticles was synthesized by the means of in situ polymerization and alky-phenylsulfonic acid doping polyaniline. The Fe3O4 nanoparticles, 11 nm of the average of crystal size, were prepared. In order to prove that the in situ polymerization prevents nanoparticles clustering, the effect of dispersant on nanoparticles was studied. It was found that the thermal stability of composite was higher than that of conducting polyaniline, which was important to the application of conducting polyaniline. The decomposition temperature of composite increased 100°C and the decomposition rate reduced greatly. It was thought that the strong absorption of nanoparticles caused above phenomenon.