Yamada Yutaka, Ishikawa Taku, Isobe Kazuma, Horibe Akihiko
Faculty of Environmental, Life, Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan.
Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan.
Small. 2025 Sep;21(37):e06765. doi: 10.1002/smll.202506765. Epub 2025 Jul 31.
Ensuring freshwater resources is a vital issue for human beings worldwide. Fog harvesting is one promising way to provide water from unconventional sources. However, clogging by the captured liquid depresses the fog harvesting performance. Here, a harp-shaped Janus harvesting system, which has thin wires with a superhydrophobic side facing the fog stream and a superhydrophilic back side to transport the droplets, is used to yield simultaneous fog capturing and water transport abilities. Attached droplets on the Janus wire transported along the periphery avoided clogging and enhanced the performance. The Janus system thus suppressed the increase and fluctuations of actual shade coefficients, which indicated blockage of the fog stream. This optimized the design of the harvester. Experiments using a multilayered Janus harvester demonstrated a significant enhancement compared with that constructed with mono-wettability wires. Overall, the results indicated the promise of droplet transportation on single wires for improving fog harvesting, as well as for other applications such as oil mist recovery and demulsification.
确保淡水资源对全球人类来说是一个至关重要的问题。雾收集是一种从非常规水源获取水的有前景的方法。然而，捕获的液体造成堵塞会降低雾收集性能。在此，一种竖琴形状的Janus收集系统被用于实现同时的雾捕获和水传输能力，该系统具有细金属丝，其超疏水侧面向雾流，超亲水背面用于传输液滴。附着在Janus金属丝上沿周边传输的液滴避免了堵塞并提高了性能。Janus系统因此抑制了实际遮光系数的增加和波动，这表明雾流被阻塞。这优化了收集器的设计。使用多层Janus收集器的实验表明，与用单润湿性金属丝构建的收集器相比有显著增强。总体而言，结果表明单根金属丝上的液滴传输有望改善雾收集，以及用于其他应用，如油雾回收和破乳。
