Paper Title:
Analysis on the Mechanical and Electrical Properties of PI/MWNTs Nano-Hybrid Films
  Abstract

In this paper, MWNTs (multi-walled carbon nanotubes) were modified by the mixture acid of H2SO4 and HNO3, the PI (polyimide)/MWNTs nano-hybrid films were prepared by means of ultrasonic vibration and in-situ polymerization. The surface morphology was characterized by SEM, the chemical structure was characterized by FT-IR. The tensile strength and Young’s modulus increased at first and then decreased with the increase of MWNTs content. The dielectric constant was tested at a frequency of 1 kHz. The dielectric constant had no obvious variation when MWNTs content was less than 2.9 wt%, as the MWNTs content exceeded 5.36 wt%, the dielectric constant increased rapidly. In general, the dielectric loss of PI/MWNTs nano-hybrid films was higher than the dielectric loss of pure polyimide films. The dielectric loss increased slowly in low frequency region but rapidly in high frequency region. All the test results were attributed to the dispersion degree of MWNTs doping and the combination degree between PI matrix and modified MWNTs in PI/MWNTs nano-hybrid films.

  Info
Periodical
Materials Science Forum (Volumes 675-677)
Edited by
Yi Tan and Dongying Ju
Pages
1241-1244
DOI
10.4028/www.scientific.net/MSF.675-677.1241
Citation
M. Y. Zhang, P. H. Diao, X. Y. Zhu, "Analysis on the Mechanical and Electrical Properties of PI/MWNTs Nano-Hybrid Films", Materials Science Forum, Vols. 675-677, pp. 1241-1244, 2011
Online since
February 2011
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Price
$32.00
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