Non-covalent poly (2-ethylhexyl acrylate) (P2EHA)/functionalized graphene/h-boron nitride flexible composites with enhanced adhesive and thermal conductivity by a facilitated latex approach

Thermally conductive poly (2-ethylhexyl acrylate) (P2EHA)/functionalized graphene/h-boron nitride composites materials were fabricated by colloid blending and self-assembly approach. Here, self-assembly technology has been used to achieve the facile surface modification of hexagonal boron nitride (h-BN) microplatelets by forming a functionalized graphene (f-G) sheets on its surface via π-π interaction. The polar functionality on the graphene surface allowed the permeation of the polymer matrix through the secondary interaction between them, increasing the content of this hybridized filler in composite. The effective and successful fabrication of f-G@h-BN microplates have been confirmed by SEM, Raman spectroscopy, XRD, and TGA investigations. The self-alignment 2D stacked fillers result in higher in-plane thermal conductivities and excellent electrical insulation of the composites. In addition to the good adhesive properties, the procedure is environment-friendly, easy operation, and potential for the practical application in large scale.