Hydrophilic Coating of Copper Particle Monolayer Wicks for Enhanced Passive Water Transport
Hydrophilic Coating of Copper Particle Monolayer Wicks for Enhanced Passive Water Transport
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DOI：
10.3390/en13123294
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发表时间：
2020-06
期刊：
影响因子：
3.2
通讯作者：
Y. Kameya;Ryota Osonoe;Yuto Anjo
中科院分区：
文献类型：
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作者：
Y. Kameya;Ryota Osonoe;Yuto Anjo
通过由导热材料制成的薄表面吸液芯进行的被动式水传输对于开发诸如热管和散热器之类的热管理装置非常重要。在这项研究中，我们展示了一种铜颗粒单层吸液芯的亲水涂层，用于增强水的传输。我们使用标称粒径为100μm的铜粉制备了铜颗粒单层，并利用扫描电子显微镜（SEM）确定了粒径分布。我们观察到在施加亲水涂层后，水接触角发生了显著变化，这表明被动式水传输得到了增强。通过电子探针微分析获得的铜、氧和硅的元素图谱证实了基于二氧化硅的涂层材料在每个铜颗粒上的沉积。尽管铜颗粒只是部分被二氧化硅覆盖，但润湿性得到了显著提高。最后，我们进行了上升速率实验，以定量表征涂覆的铜颗粒单层的水传输性能。因此，我们提出亲水涂层是一种增强通过铜颗粒单层吸液芯的被动式水传输的简单而有效的方法。
Passive water transport through thin-surface wicks made of heat conducting material is important for developing thermal management devices such as heat pipes and spreaders. In this study, we demonstrated the hydrophilic coating of a Cu particle monolayer wick for enhanced water transport. We fabricated a Cu particle monolayer using Cu powder with a nominal particle diameter of 100 μm and determined the particle size distribution using scanning electron microscopy (SEM). We observed a remarkable change in the water contact angle on the application of a hydrophilic coating, which demonstrated the enhanced passive water transport. The elemental mapping of Cu, O, and Si obtained by electron probe microanalysis confirmed the deposition of the SiO2-based coating material on each Cu particle. Although the Cu particles were only partially covered by SiO2, a remarkable enhancement in wettability was achieved. Finally, we conducted a rate-of-rise experiment to quantitatively characterize the water transport performance of the coated Cu particle monolayer. Thus, we propose hydrophilic coating as a simple and effective method to enhance passive water transport through Cu particle monolayer wicks.