Inhibiting Leidenfrost phenomenon has been conventionally mediated by texturing materials to facilitate the solid-liquid contact or by arranging vapor channels to promote vapor evacuation. However, it remains challenging to break the trade-off between the high Leidenfrost point and the high heat transfer efficiency because elevating Leidenfrost point is often accompanied by the increase of thermal resistance. We propose a method using Rayleigh-Bénard-Marangoni convection and non-solvent induced phase separation to create granulated matrices that prevent the Leidenfrost effect at temperatures up to 400 °C. These matrices offer strong capillary adhesion, ensuring water droplets remain pinned and provide effective cooling. Additionally, the unique bubble dynamics prevent film boiling and Leidenfrost levitation. The matrices are mechanically robust and thermally stable, making them suitable for cooling high-power electronic devices at high temperatures. These results highlight the potential of using polymer matrices for cooling devices at elevated temperatures, potentially advancing cooling technologies.

中文翻译：

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用粒状聚合物薄膜抑制莱顿弗罗斯特现象


抑制莱顿弗罗斯特现象通常是通过纹理材料促进固液接触或通过布置蒸汽通道以促进蒸汽排出来介导的。然而，打破高莱顿弗罗斯特点和高传热效率之间的权衡仍然具有挑战性，因为莱顿弗罗斯特点的升高往往伴随着热阻的增加。我们提出了一种使用 Rayleigh-Bénard-Marangoni 对流和非溶剂诱导相分离来创建粒状基质的方法，该基质可在高达 400 °C 的温度下防止莱顿弗罗斯特效应。这些基质具有很强的毛细管粘附力，确保水滴保持固定并提供有效的冷却。此外，独特的气泡动力学可防止薄膜沸腾和莱顿弗罗斯特悬浮。该矩阵机械坚固且热稳定，适合在高温下冷却大功率电子设备。这些结果凸显了使用聚合物基体在高温下冷却设备的潜力，有可能推进冷却技术。