The desirable dielectric properties and high thermal conductivity of epoxy composites with the cobweb-structured SiCnw-SiO_2-NH_2 hybrids

摘要

We report the preparation of epoxy-based composites by intercalating low loading of core-shell silicon carbide nanowire-silica-amino (named as SiCnw-SiO_2-NH_2) hybrids, exhibiting simultaneously high permittivity and thermal conductivity (TC) and maintaining rather low dielectric loss. More interestingly, the epoxy composites with the cobweb-structured SiCnw-SiO_2-NH_2 hybrids exhibited high thermal conductivity at low filler loading due to space micro-structures and hydrogen bond interaction. Specifically, permittivity of the sample with 3.0 vol% SiCnw-SiO_2-NH_2 hybrids reaches 61.9 under 0.1 Hz, while its dielectric loss is only 0.012, and possessing a high TC of 1.59 W/m K, respectively.