Organic Phase Change Material Composite with Segregated Thermally Conductive Filler Structure for Efficient Heat Dissipation
발표자
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초록
내용
Phase change materials (PCMs) can absorb/release heat generated externally without any change in temperature during the phase transition process, making them widely used in thermal management applications. Organic PCMs generally have low thermal conductivity and often suffer from leakage, limiting their usage in many applications. In this presentation, to this end, a PCM composite with a highly networked structure of thermally conductive hexagonal boron nitride (h-BN) fillers will be described. This outcome could be accomplished by preparing the composite by blending the filler with two immiscible organic PCMs in the melt state, yielding a Pickering emulsion before cooling it to the solid state. Due to the 2D filler network structure, the final composite exhibited high thermal conductivity (~ 20.2 W/mK), and structural stability at elevated temperatures (even above melting temperatures of both PCMs), much better than a composite composed of a single PCM matrix material and the filler.