受生物启发的辐射冷却涂层具有高辐射率和强大的自清洁功能,可持续高效散热

Yong Li, Yingnan Song, Hongye Zu, Feilong Zhang, Hui Yang, Wei Dai, Jingxin Meng, Lei Jiang
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引用次数: 0

摘要

为了克服电子设备和能源元件的过热现象,开发具有良好辐射特性的先进免能源冷却涂层似乎是一种有效的节能方法。然而,由于这些涂层易碎、易污染,其可持续性极大地限制了这些涂层的进一步应用。本文报告了一种生物启发辐射冷却涂层(BRCC),它结合了高辐射率和强大的自清洁性能,可持续地高效散热。通过多壁碳纳米管(MWCNTs)、改性二氧化硅(SiO2)和氟硅树脂(FSi)构建的分层多孔结构,BRCC 的参与提高了总传热系数≈25%,从而改善了冷却性能。在磨损和脏污测试中,BRCC 涂层铝合金散热器始终表现出稳定的辐射冷却性能。此外,仿真和实验结果均表明,减少 BRCC 的表面覆盖率(≈80.9%)仍能保持较高的冷却效率,从而开辟了一条具有成本效益的途径。因此,本研究可为先进辐射冷却涂层的设计和制造提供指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Bioinspired radiative cooling coating with high emittance and robust self-cleaning for sustainably efficient heat dissipation

Bioinspired radiative cooling coating with high emittance and robust self-cleaning for sustainably efficient heat dissipation

To overcome the overheating phenomena of electronic devices and energy components, developing advanced energy-free cooling coatings with promising radiative property seem an effective and energy-saving way. However, the further application of these coatings is greatly limited by their sustainability because of their fragile and easy contamination. Herein, it is reported that a bioinspired radiative cooling coating (BRCC) displayed sustainably efficient heat dissipation by the combination of high emittance and robust self-cleaning property. With the hierarchical porous structure constructed by multiwalled carbon nanotubes (MWCNTs), modified SiO2 and fluorosilicone (FSi) resin, the involvement of the BRCC improves the cooling performance by increasing ≈25% total heat transfer coefficient. During the abrasion and soiling tests, the BRCC-coated Al alloy heat sink always displays stable radiative cooling performance. Moreover, the simulation and experimental results both revealed that reducing surface coverage of BRCC (≈80.9%) can still keep highly cooling efficiency, leading to a cost-effective avenue. Therefore, this study may guide the design and fabrication of advanced radiative cooling coating.

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