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Dramatic property enhancement in polyetherimide using low-cost commercially functionalized multi-walled carbon

Sandeep Kumar1, Bin Li, Santiago Caceres

  • 1School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, USA.

Nanotechnology
|October 23, 2009
PubMed
Summary

This study developed a simple process for polyetherimide/carbon nanotube composites, achieving significant electrical and thermal enhancements with low nanotube content for industrial applications.

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Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Polyetherimide (PEI) possesses excellent mechanical, thermal, and fire-resistant properties.
  • Developing multifunctional PEI/carbon nanotube (CNT) composites is challenging due to processing difficulties and high CNT treatment costs.

Purpose of the Study:

  • To report a simple and innovative fabrication process for PEI/CNT nanocomposite films.
  • To achieve enhanced properties in PEI nanocomposites using low-cost, functionalized multi-walled carbon nanotubes (MWNTs).

Main Methods:

  • Fabrication of PEI nanocomposite films using commercially functionalized MWNTs.
  • Characterization of material properties including electrical conductivity and thermal decomposition temperature.
  • Microscopic analysis (Field Emission Scanning Electron Microscopy) to assess MWNT dispersion and polymer-MWNT interaction.

Main Results:

  • Achieved exceptional properties with only 0.5 wt% MWNTs.
  • Increased electrical conductivity by 12 orders of magnitude.
  • Increased thermal decomposition temperature by 86°C, enabling higher service temperatures.
  • Observed uniform dispersion of MWNTs and a homogeneous nanotube network.

Conclusions:

  • The developed processing approach is simple, innovative, and cost-effective.
  • The resulting PEI/MWNT nanocomposites exhibit significantly enhanced electrical and thermal properties.
  • These nanocomposites show great potential for multi-functional coatings and interfacing materials in aerospace and electronics.