Individual dissolution of single-walled carbon nanotubes by using polybenzimidazole, and highly effective reinforcement of their composite films

Minoru Okamoto, Tsuyohiko Fujigaya, Naotoshi Nakashima

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

Polybenzimidazole (PBI) is shown to individually dissolve/disperse single-walled carbon nanotubes (SWNTs) in N,N-dimethylacetamide (DMAc), which is demonstrated by vis-near IR absorption and photoluminescence spectroscopy and atomic force microscopy observations. By casting these dispersions, SWNTs/PBI composite films were successfully fabricated on substrates without any sign of macroscopic aggregation. The thermal stability and mechanical properties of the composite films were investigated using thermogravimetric analysis (TGA) and tensile tests, respectively, and it was found that, first, the addition of SWNTs to PBI does not deteriorate the thermal stability of the matrix film, and second, the mechanical properties of the PBI film were reinforced by ca. 50% with only 0.06 wt% addition of the SWNTs to the film without reducing the thermal stability of the PBI. Raman spectroscopy of the composite films revealed the existence of an interaction between the PBI and the SWNTs. The individual dissolution of the SWNTs and efficient reinforcement of the PBI are due to the π-π interaction between the PBI and the sidewalls of the SWNTs.

Original languageEnglish
Pages (from-to)1776-1782
Number of pages7
JournalAdvanced Functional Materials
Volume18
Issue number12
DOIs
Publication statusPublished - Jun 24 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry

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