冷凝
成核
露水
润湿
材料科学
抽吸
多孔介质
露点
化学物理
多孔性
纳米技术
化学工程
热力学
化学
复合材料
物理
工程类
作者
Yaqi Cheng,Mingmei Wang,Jing Sun,Minjie Liu,Bingang Du,Yuanbo Liu,Yuankai Jin,Rongfu Wen,Zhong Lan,Xiaofeng Zhou,Xuehu Ma,Zuankai Wang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2021-06-26
卷期号:21 (17): 7411-7418
被引量:45
标识
DOI:10.1021/acs.nanolett.1c01928
摘要
Water collection by dew condensation emerges as a sustainable solution to water scarcity. However, the transient condensation process that involves droplet nucleation, growth, and transport imposes conflicting requirements on surface properties. It is challenging to satisfy all benefits for different condensation stages simultaneously. By mimicking the structures and functions of moss Rhacocarpus, here, we report the attainment of dropwise condensation for efficient water collection even on a hydrophilic surface gated by a liquid suction mechanism. The Rhacocarpus-inspired porous surface (RIPS), which possesses a three-level wettability gradient, facilitates a rapid, directional, and persistent droplet suction. Such suction condensation enables a low nucleation barrier, frequent surface refreshing, and well-defined maximum droplet shedding radius simultaneously. Thus, a maximum ∼160% enhancement in water collection performance compared to the hydrophobic surface is achieved. Our work provides new insights and a design route for developing engineered materials for a wide range of water-harvesting and phase-change heat-transfer applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI