Single-wall carbon nanotube polymer composites: Investigating their percolative behavior and physical performance

Zoubeida Ounaies, Joycelyn Harrison, Cheol Park

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


In this work, an approach to enhance the electroactive response of polymers is pursued. Single-wall carbon nanotubes (SWNT) nanoinclusions are dispersed in a piezoelectric polyimide. A qualitative assessment of dispersion is done using optical microscopy and high resolution scanning electron microscopy. Key requirements for the resulting nanocomposites are flexibility, and thermal and chemical stability. Electrical and dielectric properties of the SWNT-reinforced polyimide composites are investigated as a function of SWNT concentration. AC and DC conductivities are measured. The experimental dielectric constant was found to obey a percolation-like power law with a relatively low percolation threshold. It is found that addition of the SWNT in the polyimide composites facilitates poling and results in an increase of the piezoelectric properties of the composites. Furthermore, at higher SWNT concentration, a bending strain is observed at relatively low electric fields, indicating the potential of using these composites actuators. Current investigations illustrate the effects of SWNTs on dielectric, piezoelectric and electroactive properties. Further work is ongoing to assess the effect SWNTs on the mechanical and thermal properties of the polyimide matrix.

Original languageEnglish (US)
Article number62471
Pages (from-to)307-311
Number of pages5
JournalAmerican Society of Mechanical Engineers, Aerospace Division (Publication) AD
StatePublished - 2004
Event2004 ASME International Mechanical Engineering Congress and Exposition - Anaheim, CA, United States
Duration: Nov 13 2004Nov 19 2004

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Space and Planetary Science


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