Icephobic behaviors of superhydrophobic amorphous carbon nano-films synthesized from a flame process
Icephobic behaviors of superhydrophobic amorphous carbon nano-films synthesized from a flame process
复制标题
火焰法合成的超疏水非晶碳纳米薄膜的疏冰行为
DOI：
10.1016/j.jcis.2019.05.096
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发表时间：
2019
影响因子：
9.9
通讯作者：
Yao Wei
中科院分区：
文献类型：
--
作者：
Xu Yantong;Zhang Guang;Li Long;Xu Changjian;Lv Xiaochen;Zhang Hui;Yao Wei
在寒冷环境中，冰的形成和积聚是导致电力线、飞机机翼和其他重要设施故障的关键问题。虽然在过去的几十年里已经设计出了大量基于超疏水材料的被动疏冰表面，但复杂和高成本的制造工艺限制了它们的大规模应用。因此，进一步研究易获得的低成本功能性憎冰材料是十分必要的。本文采用乙醇-火焰合成的方法，在普通玻璃上合成了一种由非晶碳纳米颗粒组成的超疏水薄膜。更重要的是，充分测量了制备的碳纳米膜的微观结构，以及水滴的静态接触角和动态滑动角。通过测量不同冷却温度下水滴的冻结时间、冰的粘附强度和水滴的动态滑动角等关键参数，对碳纳米膜和裸玻璃的疏冰性能进行了细致的研究。静态接触角和动态滑动角测量结果表明，合成的碳纳米膜具有优异的超疏水性。此外，在低至- 23 °C的冷却温度下，水滴可以以bbbb50°的倾角从碳纳米膜上完全滚出。超疏水碳纳米膜能显著减缓水滴在普通玻璃上的冻结过程。此外，碳纳米膜显著降低了冰的粘附强度。因此，碳纳米膜通过有效地减少冰的形成和积累而产生优异的疏冰性能。因此，我们的工作为低成本的恐冰应用提供了一种潜在的方法。
HypothesisIce formation and accumulation are critical issues for the breakdown of power lines, aircraft wings, and other important facilities in cold environments. Although a large number of passive icephobic surfaces based on superhydrophobic materials have been designed in the last few decades, the complicated and high-cost fabrication processes limit them beyond large-scale applications. Therefore it is indeed to further investigate the readily available and low-cost functional icephobic materials.ExperimentsIn this article, a kind of superhydrophobic film consisting of amorphous carbon nano-particles was synthesized on common glass by the ethanol-flame synthesis method. More importantly, the microstructures of the as-prepared carbon nano-film, as well as the static contact angles, and the dynamic sliding-off angles of water droplets, were fully measured. The icephobic properties of the carbon nano-film and bare glass were also carefully investigated by measuring the critical parameters, including freezing times of water droplets, ice adhesion strengths, and dynamic sliding-off angles of droplets at different cooling temperatures.FindingsResults of static contact angle and dynamic sliding-off angle measurements reveal that the as-synthesized carbon nano-film has outstanding superhydrophobic properties. Furthermore, water droplets could completely roll off from the carbon nano-film with inclination angles >5° at cooling temperatures as low as −23 °C. It is also observed that the superhydrophobic carbon nano-film remarkably decelerate the freezing process of water droplets on common glass. In addition, the ice adhesion strength is remarkably reduced by the carbon nano-film. Hence, the carbon nano-film yields excellent icephobic properties by effectively reducing the formation and accumulation of ice. Thus, our work provides a potential approach for low-cost icephobic applications.