Research Article

Nano Research

, Volume 3, Issue 2, pp 103-109

Open Access This content is freely available online to anyone, anywhere at any time.

PEGylation of double-walled carbon nanotubes for increasing their solubility in water

  • Haiyu NieAffiliated withBeijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University
  • , Wei GuoAffiliated withBeijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University
  • , Yuan YuanAffiliated withBeijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University
  • , Zengpei DouAffiliated withBeijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University
  • , Zujin ShiAffiliated withBeijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University
  • , Zhen LiuAffiliated withInstitute of Nanochemistry and Nanobiology, Shanghai University
  • , Haifang WangAffiliated withBeijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking UniversityInstitute of Nanochemistry and Nanobiology, Shanghai University Email author 
  • , Yuanfang LiuAffiliated withBeijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking UniversityInstitute of Nanochemistry and Nanobiology, Shanghai University Email author 

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.

http://static-content.springer.com/image/art%3A10.1007%2Fs12274-010-1014-4/MediaObjects/12274_2010_1014_Fig1_HTML.jpg

Keywords

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