Synthesis and Properties of the Amino-Functionalized Multiple-Walled Carbon Nanotubes/polyimide Nanocomposites

摘要

The 1,6-hexanediamine-functionalized multi-walled carbon nanotubes(a-MWNTs)/polyimide(PI) nanocomposite films were prepared through in-situ polymerization followed by mixture casting, evaporation, and thermal imidization. To increase the compatibility of carbon nanotubes with the matrix polyimide, a-MWNTs was used as the filler. According to the results, a-MWNTs were homogeneously dispersed in the nanocomposite films. With the incorporation of a-MWNTs, the mechanical properties of the resultant films were improved due to the strong chemical bonding and interfacial interaction between a-MWNTs and 4,4-oxydiphthalic anhydride(ODPA)/4,4'-Oxydianiline(ODA) polyimide matrix. The thermal stability of the a-MWNTs/polyimide nanocomposite was also improved by the addition of a-MWNTs. The electrical tests showed a percolation threshold at about 0.85 vol% and the electrical properties were increased sharply.