Multiwalled carbon nanotubes functionalized by hyperbranched poly(urea-urethane)s by a one-pot polycondensation

Yingkui Yang, Xiaolin Xie, Jingao Wu, Zhifang Yang, Xiaotao Wang, Yiu Wing Mai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

92 Citations (Scopus)

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 languageEnglish
Pages (from-to)1695-1701
Number of pages7
JournalMacromolecular Rapid Communications
Volume27
Issue number19
DOIs
Publication statusPublished - 2 Oct 2006
Externally publishedYes

Keywords

  • Carbon nanotubes
  • Functionalization
  • Hyperbranched
  • Polycondensation

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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