共 9 条
Electron beam modification and functionalization of MWNT for covalent dispersion into polymeric systems
被引:12
作者:
Sullivan, Mary E.
[1
]
Klosterman, Don
[2
]
Palmese, Giuseppe R.
[1
]
机构:
[1] Drexel Univ, Dept Chem & Biol Engn, Philadelphia, PA 19104 USA
[2] Univ Dayton, Res Inst, Dayton, OH 45469 USA
来源:
基金:
美国国家航空航天局;
美国国家科学基金会;
关键词:
carbon nanotubes;
surface modification;
Raman spectroscopy;
transmission electron microscopy;
D O I:
10.1016/j.nimb.2007.09.002
中图分类号:
TH7 [仪器、仪表];
学科分类号:
0804 ;
080401 ;
081102 ;
摘要:
The development of nanotube-based polymer composites with improved mechanical properties and electrical conductivity requires the covalent dispersion of carbon nanotubes to utilize their stress transfer capabilities. Covalent dispersion of nanotubes therefore requires the functionalization of their surface to interact with solvents or monomers. In this work, we have developed a novel method of nanotube surface modification in which dry MANT are irradiated with a high-energy electron beam (EB) in ambient air environment. Raman spectroscopy was performed to characterize the influence of EB irradiation on nanotubes, namely, variance of the disorder, or D band (similar to 1360 cm(-1)) with respect to the graphitic, or G, band (similar to 1580 cm(-1)). Raman spectra show increased deformation to the graphitic structure, as well as increased strain on the carbon-carbon bonds, weakening the nanotube. Transmission electron microscopy (TEM) confirms that nanotubes remain intact despite high EB dose. In addition, minimal surface deformation and length reduction occurred on irradiated MWNT. (c) 2007 Elsevier B.V. All rights reserved.
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页码:352 / 355
页数:4
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