PEGylation of double-walled carbon nanotubes for increasing their solubility in water
Double-walled carbon nanotubes (DWNTs), functionalization, polyethylene glycol (PEG), water soluble
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.
Tsinghua University Press
Haiyu Nie,Wei Guo,Yuan Yuan,Zengpei Dou,Zujin Shi,Zhen Liu,Haifang Wang,Yuanfang Liu, PEGylation of double-walled carbon nanotubes for increasing their solubility in water. NanoRes.2010, 3: 103–109