Thermal anisotropy of epoxy resin-based nano-hybrid films containing BN nanosheets under a rotating superconducting magnetic field

We demonstrated that the orientation of unmodified BN nanosheets can be controlled in a polymer matrix either perpendicular or parallel to the nanocomposite film surface with high anisotropy triggered by a rotating superconducting magnetic field (10T) while the prepolymer suspension of polyepoxide was cross-linked. The resulting polymer nanocomposite had outstanding thermal anisotropy, and the increased thermal diffusivity was proportional to the anisotropic orientation of the BN nanosheet. This research provides a method to effectively control diamagnetic 1D or 2D nanofiller particles in polymer-based nanocomposites, and may provide enhanced dielectric thermal interface materials for the semiconductor industry.

Thermal anisotropy of epoxy resin based nanocomposites with orientation of unmodified BN nanosheets, induced by a rotating high magnetic field.Figure optionsDownload as PowerPoint slideHighlights
► Fabrication of thermally anisotropic polyepoxide/BN nanosheet nanocomposites films.
► Controlled assembly of diamagnetic fillers in polymer under rotating magnetic fields.
► High thermal anisotropy of composites without necessitating modification of the BN.