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Silicon-based radiation refrigeration emitter for atmospheric water collection and preparation method of silicon-based radiation refrigeration emitter
The invention discloses a silicon-based radiation refrigeration emitter for atmospheric water collection and a preparation method of the silicon-based radiation refrigeration emitter, and a composite nested structure of a groove and an air microcavity is prepared on a diamond wire-cut silicon substrate through a metal-assisted chemical etching method and rounding treatment and is subjected to local oxidation treatment. According to the invention, the introduction of the air microcavity enables a large number of bubbles to exist at the interface between water drops and the radiation refrigeration emitter, thereby reducing the sliding angle of condensate water; while the nucleation rate of water vapor condensation is ensured, a condensed water film can be timely desorbed from the surface, and the rate of taking water from air is greatly improved; the prepared silicon-based radiation refrigeration emitter with the anisotropy and the low sliding angle can achieve efficient atmospheric water collection.
本发明公开了一种用于大气集水的硅基辐射制冷发射极及其制备方法，在金刚石线切割的硅衬底上，通过金属辅助化学刻蚀法和圆化处理制备了凹槽与空气微腔的复合嵌套结构并进行局部氧化处理。本发明中，空气微腔的引入使得水滴与辐射制冷发射极界面处存在大量气泡，从而减小了冷凝水的滑动角；本发明在保证水汽冷凝的成核速率的同时，冷凝水膜能及时从表面解附，大大提高了空气取水速率；制备得到的具有各向异性低滑动角的硅基辐射制冷发射极可实现高效大气集水。
Silicon-based radiation refrigeration emitter for atmospheric water collection and preparation method of silicon-based radiation refrigeration emitter
The invention discloses a silicon-based radiation refrigeration emitter for atmospheric water collection and a preparation method of the silicon-based radiation refrigeration emitter, and a composite nested structure of a groove and an air microcavity is prepared on a diamond wire-cut silicon substrate through a metal-assisted chemical etching method and rounding treatment and is subjected to local oxidation treatment. According to the invention, the introduction of the air microcavity enables a large number of bubbles to exist at the interface between water drops and the radiation refrigeration emitter, thereby reducing the sliding angle of condensate water; while the nucleation rate of water vapor condensation is ensured, a condensed water film can be timely desorbed from the surface, and the rate of taking water from air is greatly improved; the prepared silicon-based radiation refrigeration emitter with the anisotropy and the low sliding angle can achieve efficient atmospheric water collection.
本发明公开了一种用于大气集水的硅基辐射制冷发射极及其制备方法，在金刚石线切割的硅衬底上，通过金属辅助化学刻蚀法和圆化处理制备了凹槽与空气微腔的复合嵌套结构并进行局部氧化处理。本发明中，空气微腔的引入使得水滴与辐射制冷发射极界面处存在大量气泡，从而减小了冷凝水的滑动角；本发明在保证水汽冷凝的成核速率的同时，冷凝水膜能及时从表面解附，大大提高了空气取水速率；制备得到的具有各向异性低滑动角的硅基辐射制冷发射极可实现高效大气集水。
Silicon-based radiation refrigeration emitter for atmospheric water collection and preparation method of silicon-based radiation refrigeration emitter
一种用于大气集水的硅基辐射制冷发射极及其制备方法
GAO KAI (author) / TAN DEZHI (author) / CHEN CHENDUAN (author) / WU JIAJIA (author) / WANG ZHIQIANG (author)
2024-09-20
Patent
Electronic Resource
Chinese
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