| 초록 |
To achieve efficient heat dissipation using polymer composites, aligning thermally conductive and anisotropic filler in desired direction is very important. So far, external fields have been applied to align the fillers in melts. However, those processes are generally energy intensive and also require stimuli-responsive fillers by surface modification. In this research, to that end, a facile and energy-efficient method for aligning filler by harnessing a temperature gradient driven convection from hot to cold region, or thermophoresis, will be reported. Suspension of UV-curable monomer with well-dispersed hexagonal boron nitride (h-BN) was subjected to temperature gradients, inducing the material convection prior to photo-crosslinking. The resulting solid composite possessed shear aligned h-BN in a direction agreed with expected for thermophoresis as evidenced by cross-section scanning electron microscopy and anisotropic thermal conductivity measurement. |
