Relation of the number of cross-links and mechanical properties of multi-walled carbon nanotube films formed by a dehydration condensation reaction

Shin Ichi Ogino, Yoshinori Sato, Go Yamamoto, Kenichiro Sasamori, Hisamichi Kimura, Toshiyuki Hashida, Kenichi Motomiya, Balachandran Jeyadevan, Kazuyuki Tohji

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21 Citations (Scopus)

Abstract

Multi-walled carbon nanotube (MWCNT) films were prepared by employing a condensation reaction utilizing 1,3-dicyclohexylcarbodiimide (DCC) to cross-link each MWCNT with carboxylic acid and hydroxyl groups. Morphological changes in the resultant MWCNT films were monitored using scanning electron microscopy and showed that the MWCNTs were randomly intertwined in the films. The prepared MWCNT films were 17 mm in diameter and 20 μm in thickness, and the apparent density was 0.59 g/cm3. Fourier transforminfrared spectroscopy confirmed that each MWCNT modified with carboxylic acid and hydroxyl groups was cross-linked through the ester bond. It was found that the ratio of the number of ester cross-links and carbon atoms of the nanotubes per unit apparent volume (cm3) of condensed-MWCNT films was 5.27 × 10-3 using thermogravimetric analysis (TGA). The tensile strength and Vickers hardness of condensed-MWCNT films achieved an average of 15 and 9.2 MPa, respectively, and were greater than those of free-standing MWCNT films without ester bond.

Original languageEnglish
Pages (from-to)23159-23163
Number of pages5
JournalJournal of Physical Chemistry B
Volume110
Issue number46
DOIs
Publication statusPublished - 2006 Nov 23

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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