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Research Article | Open Access

PEGylation of Double-Walled Carbon Nanotubes for Increasing Their Solubility in Water

Haiyu Nie1, Wei Guo1, Yuan Yuan1, Zengpei Dou1, Zujin Shi1, Zhen Liu2, Haifang Wang1,2( ), Yuanfang Liu1,2( )
Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering, Peking UniversityBeijing 100871 China
Institute of Nanochemistry and Nanobiology Shanghai UniversityShanghai 200444 China
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Abstract

Polyethylene glycol (PEG) functionalized double-walled carbon nanotubes (DWNTs) have been synthesized by a [2 + 1] cycloaddition reaction and characterized by transmission electron microscopy, atomic force microscopy, Raman spectroscopy, thermal gravimetric analysis, and UV–visible spectroscopy. Functionalization affords a large increase in the aqueous solubility of DWNTs. The saturated concentrations of DWNTs functionalized with diazido-terminated PEG800 (with a molecular weight of 800) and azido-terminated PEG750 monomethylether (with a molecular weight of 750) are very similar—0.36 and 0.37 mg/mL (DWNTs equivalent concentration), respectively.

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Keywords

Double-walled carbon nanotubes (DWNTs)functionalizationpolyethylene glycol (PEG)water soluble

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Nano Research
Volume 3 Issue 2,
February 2010
Pages 103-109
DOI: 10.1007/s12274-010-1014-4

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Cite this article:
Nie H, Guo W, Yuan Y, et al. PEGylation of Double-Walled Carbon Nanotubes for Increasing Their Solubility in Water. Nano Research, 2010, 3(2): 103-109. https://doi.org/10.1007/s12274-010-1014-4

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Received: 18 September 2009
Revised: 12 December 2009
Accepted: 12 December 2009
Published: 27 March 2010
© The Author(s) 2010