嵌段聚合物非共价修饰对碳纳米管／聚苯乙烯复合材料导电性能的影响

Effect of Block Polymer Modification of Multiwalled Carbon Nanotubes on the Electrical Conductivity of MWNTs/Polystyrene Nanocomposites

采用嵌段共聚物PS-b-PAH非共价修饰碳纳米管,透射电镜(TEM)结果表明,PS-b-PAH均匀包覆在碳管表面,有利于碳纳米管在PS基体中分散。电性能表征结果显示,PS-b-PAH非共价修饰碳纳米管P-MWNTs/PS复合材料的渗流阈值远低于未修饰MWNTs/PS复合材料。

The block polymer of poly （styrene-b-pyrene） （PS-b-PAH） was successfully applied on the surface of muhiwalled carbon nanotubes （MWNTs）. The morphology of MWNTs modified by PS-b-PAH was investigated by transmission electron microscopy（TEM）. The TEM results of PS-b-PAH modified MWNTs in polystyrene（PS） matrices show that PS-b-PAH can effectively help to disperse MWNTs well in PS matrices. The percolation threshold of the modified P-MWNTs/PS composites was lower than that of pristine MWNTs/PS composites.