Chen Shuyu, Yang Ming, Liu Bin, Xu Min, Zhang Teng, Zhuang Bilin, Ding Ding, Huai Xiulan, Zhang Hang
Institute of Engineering Thermophysics, Chinese Academy of Sciences Beijing 100190 China
University of Chinese Academy of Sciences Beijing 100049 China.
RSC Adv. 2019 Feb 6;9(8):4563-4570. doi: 10.1039/c8ra09879d. eCollection 2019 Jan 30.
Highly efficient thermal transport between graphene and water is crucial in applications such as microscopic heat dissipation, solar steam generation, sea-water desalination, and thermally conductive composites. However, a practical approach for enhancing thermal transport across graphene-water interfaces is lacking. We propose an effective and universal method to improve thermal-transport properties at the interface between multilayer graphene and water by a factor of ∼4 by grafting functionalized groups onto graphene. The most improved interfacial thermal conductance was 121.0 ± 11.4 MW m K. This design is compatible with industrial processes. We also undertook molecular-level analyses to unveil the underlying mechanism for heat-transport enhancement. This study could provide new approaches for engineering heat transport across two-dimensional materials and water interfaces.
石墨烯与水之间高效的热传输在微观散热、太阳能蒸汽产生、海水淡化及导热复合材料等应用中至关重要。然而，目前仍缺乏一种切实可行的方法来增强石墨烯 - 水界面的热传输。我们提出了一种有效且通用的方法，通过在石墨烯上接枝官能团，将多层石墨烯与水界面的热传输性能提高约4倍。改进后的最高界面热导率为121.0±11.4 MW m⁻² K⁻¹。该设计与工业生产过程兼容。我们还进行了分子层面的分析，以揭示热传输增强的潜在机制。这项研究可为调控二维材料与水界面间的热传输提供新方法。
