接枝聚苯乙烯/多壁碳纳米管纳米复合材料制备及合成机理  

Synthesis and Mechanism of Nanocomposites Containing Multi-walled Carbon Nanotubes Grafted from Polystyrene

作　　者：盛玮[1] 徐学诚[1] 

机构地区：[1]华东师范大学物理学系纳米功能材料与器件研究中心,上海200241

出　　处：《化学学报》2011年第12期1393-1398,共6页Acta Chimica Sinica

基　　金：上海市纳米科技专项基金(No.0252nm011)资助项目

摘　　要：通过原位悬浮聚合的方法,以过氧化苯甲酰(BPO)做引发剂,制备了聚苯乙烯/多壁碳纳米管(MWNT-g-PS)纳米复合材料,复合材料在水和乙醇中均表现出良好的分散性及稳定性.通过高倍透射电镜(HRTEM)、场发射扫描电镜(FESEM)分析,多壁碳纳米管上包覆有1～3 nm的聚苯乙烯膜,并分布有半径从几十纳米到几百纳米不等的聚苯乙烯微球.通过傅立叶变换红外光谱(FTIR)、拉曼光谱(Raman spectroscopy)、X光电子能谱(XPS)和热重分析(TGA)对复合材料进行分析,结果表明,自由基将多壁碳纳米管表面π键打开,形成一种新的自由基,引发聚苯乙烯的自由基聚合,形成了接枝聚苯乙烯/多壁碳纳米管纳米复合材料.Nanocomposites containing nanotubes grafted from polystyrene（PS）,which had good dispersi-bility in water and ethanol,were prepared by in situ suspension polymerization,using benzoyl peroxide（BPO） as initiator.The high-resolution transmission electron microscopy（HRTEM） and field emission scanning electron microscopy（FESEM） suggested that the multi-walled carbon nanotubes（MWNT） were covered by PS films of 1～3 nm and PS latex whose radius are from few nanometers to hundreds of nano-meters.The π bond on the surface of MWNT were opened by radicals generated from BPO to form a new type of radicals containing MWNT.The chemical bond between MWNT and polystyrene was confirmed by Fourier transform infrared spectroscopy（FTIR）,Raman spectroscopy and X-ray photoelectron spectroscopy（XPS）.

关 键 词：聚苯乙烯 多壁碳纳米管 接枝 纳米复合材料 自由基 分散性 

分 类 号：TB383.1[一般工业技术—材料科学与工程]