Thermal Conductivity of Epoxy Resin Reinforced with Magnesium Oxide Coated Multiwalled Carbon Nanotubes

Abstract EN

Magnesium oxide coated multiwalled carbon nanotubes (MgO@MWNT) were fabricated and dispersed into epoxy matrix.

The microstructures of MgO@MWNT and epoxy/MgO@MWNT nanocomposites were characterized by TEM and SEM.

Electrical resistivity and thermal conductivity of epoxy nanocomposites were investigated with high resistance meter and thermal conductivity meter, respectively.

MgO@MWNT has core-shell structure with MgO as shell and nanotube as core, and the thickness of MgO shell is ca.

15 nm.

MgO@MWNT has been dispersed well in the epoxy matrix.

MgO@MWNT loaded epoxy nanocomposites still retain electrical insulation inspite of the filler content increase.

However, thermal conductivity of epoxy was increased with the MgO@MWNT content increasing.

When MgO@MWNT content reached 2.0 wt.%, thermal conductivity was increased by 89% compared to neat epoxy, higher than that of unmodified MWNT nanocomposites with the same loading content.