2D Filler Orientation Control in Polymer using Thermophoresis
발표자
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초록
내용
To achieve efficient heat dissipation using polymer composites, it is important to optimize the heat conduction pathway. Therefore, manipulating the orientation of thermally conductive 2D fillers in composites represents a judicious strategy. In this presentation, a facile method for manufacturing composite with an orientation-controlled model anisotropic filler, hexagonal boron nitride (h-BN), by harnessing thermophoresis will be described. Thermophoresis causes movement and/or rotation of solid particles in a fluid with a steady temperature gradient. A suspension of UV-curable monomer with well-dispersed h-BN was subjected to a temperature gradient, inducing filler rotation via thermophoresis. A subsequent photo-curing yielded a solid composite with the frozen h-BN aligned in a direction agreed with expected for thermophoresis, as indicated by the anisotropic thermal conductivity measurement and cross-sectional scanning electron microscopy (SEM) observation.