探索共连接的类似液体的表面的捕水效率
Anthony Katselas1, Isaac J Gresham1, Andrew R J Nelson2
1School of Chemistry and The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia.
The Journal of chemical physics
|June 6, 2023
概括
研究了利用凝结方法捕获大气中的水. 滑动的水友表面显示出更快的滴滴离开,使它们成为收集露水的理想选择,在捕获水效率方面表现优于其他材料.
科学领域:
- 材料科学 材料科学 材料科学
- 表面科学是一门学科.
- 可持续的水技术 可持续的水技术
背景情况:
- 大气湿度的凝结提供了一个可持续的水源.
- 了解表面特性对于有效的捕获水至关重要.
- 低次冷却条件模仿自然露水的形成.
研究的目的:
- 在低次冷却 (11°C) 时研究潮湿空气的凝结.
- 分析水接触角度和歇斯底里斯对水捕获率的影响.
- 比较各种水友和疏水表面的水收集.
主要方法:
- 在光滑的晶片和粗的玻璃上使用了聚乙烯氧化物 (MPEO) 和聚二甲基 (PDMS) 的分子薄涂层.
- 创建了带有低接触角歇斯底里斯 (CAH) 的滑动共振连接液体表面 (SCALS).
- 对比MPEO,PDMS和聚乙烯 (N-vinylpyrrolidone) (PNVP) 表面具有不同的CAH.
主要成果:
- MPEO和PDMS涂层收集了相似的水量 (~5 l m−2 day−1),比PNVP表面的表现优于~20%.
- 在MPEO和PDMS层上的滴滴大小很小 (600-2000μm),热传导阻力微不足道.
- 与PDMS SCALS (90分钟) 相比,滑动的MPEO SCALS表现出明显更快的第一滴滴离开 (28分钟).
结论:
- 滑动的水友表面,特别是MPEO SCALS,由于滴滴的快速流失,因此对露水收集有希望.
- 像接触角歇斯底里斯这样的表面特性会影响收集水的效率.
- 优化表面设计可以增强从大气水分中收集可持续的水.
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