Abstract
Hyperbranched poly(urea-urethane)-functionalized multiwalled carbon nanotubes (MWNT-HPUs) have been synthesized by a one-pot polycondensation of tolylene 2,4-diisocyanate and diethanolamine in die presence of MWNTs terminated with multiple hydroxy groups. FT-IR, Raman, 1H NMR, and 13C NMR spectra reveal that the HPU trees are covalently grafted onto the MWNT surfaces. After a high density of HPU trees (83.5 wt.-%) is attached to the MWNTs, core-shell nanostructures with MWNTs as the core and the HPU trees as the shell are formed. A loose and uniform nanotube network can be observed by TEM, SEM, and AFM. The resulting MWNT-HPUs are soluble in polar solvents such as dimethylformamide, dimethylacetamine, 1-methyl-2-pyrrolidinone, and dimethyl sulfoxide.
Original language | English |
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Pages (from-to) | 1695-1701 |
Number of pages | 7 |
Journal | Macromolecular Rapid Communications |
Volume | 27 |
Issue number | 19 |
DOIs | |
Publication status | Published - 2 Oct 2006 |
Externally published | Yes |
Keywords
- Carbon nanotubes
- Functionalization
- Hyperbranched
- Polycondensation
ASJC Scopus subject areas
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry