Magnetic field induced thermal conductive networks in silicone rubber composites with a low fraction of hybrid filler

摘要

The high thermal conducting composites with low filler content are of critical importance in developing high-performance thermal interface materials, In this work, the thermal conductive silicone rubber composites with a low volume fraction (≤4.58%) of Carbon Nanotubes (CNTs) and magnetic nickel microfibers hybrid filler were prepared by the simple mixing and curing process at room temperature. A remarkable enhancement in thermal conductivity was observed for the composites cured under an external magnetic field of -0.5 T. This improvement in thermal conductivity can be attributed to the conductive network formation of CNTs-nickel microfibers induced by the external magnetic field.