Multi-walled carbon nanotube reinforced epoxy composites were fabricated using shear
mixing and sonication. The mechanical, viscoelastic, thermal, and electrical properties of the
fabricated specimens were measured and evaluated. From the images and the results of the
measurements of tensile strengths, the specimens having 0.6 wt% nanotube content showed
better dispersion and higher strength than those of the other specimens. The Young’s moduli
of the specimens increased as the nanotube filler content was increased in the matrix. As the
concentrations of nanotubes filler were increased in the composite specimens, their storage
and loss moduli also tended to increase. The specimen having a nanotube filler content of
0.6 wt% showed higher thermal conductivity than that of the other specimens. On the other
hand, in the measurement of thermal expansion, specimens having 0.4 and 0.6 wt% filler
contents showed a lower value than that of the other specimens. The electrical conductivities
also increased with increasing content of nanotube filler. Based on the measured and
evaluated properties of the composites, it is believed that the simple and efficient fabrication
process used in this study was sufficient to obtain improved properties in the specimens