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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (12): 1393-1398. 上一篇    下一篇

研究论文

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

盛玮，徐学诚*   

  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)
  • 投稿日期:2010-09-09 修回日期:2011-01-21 发布日期:2011-02-17
  • 通讯作者: 盛玮 E-mail:swvicky@yahoo.com.cn
  • 基金资助:

    上海市纳米科技专项基金

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

SHENG Wei, XU Xue-Cheng   

  1. (Department of Physics, Center of Functional Nanomaterials and Devices, East China Normal University, Shanghai 200241)
  • Received:2010-09-09 Revised:2011-01-21 Published:2011-02-17

PDF

1563

被引次数

12

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.

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

Nanocomposites containing nanotubes grafted from polystyrene (PS), which had good dispersibility 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 were covered by PS films of 1～3 nm and PS latex whose radius are from few nanometers to hundreds of nanometers. 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).

Key words: polystyrene, MWNT, grafting, nanocomposites, radical, dispersibility