摘要
为了研究冷表面对超疏水涂层的防冰霜性能和液滴的撞击接触行为的影响,在碳纤维表面喷涂氟基自组装超疏水涂层,然后在半导体制冷台上对试样进行结霜、液滴结冰和液滴接触行为的可视化观测,分析超疏水涂层表面的结霜、液滴结冰以及液滴的撞击接触行为随时间的变化规律。结果表明:在-5℃下,与普通表面不同,超疏水表面的凝结液滴没有发生冻结。在-10、-15℃下,超疏水表面的抑霜效果明显优于普通表面,结霜时间分别延迟了34 s和22 s;在-5、-10、-15℃下,超疏水表面上液滴的延迟结冰时间分别是普通表面的16倍、10倍、9倍;在不同温度下,液滴在撞击低温超疏水表面后,最大铺展直径相同,在-5、-10℃下液滴部分反弹,25℃下液滴在超疏水表面反弹了11次。
In order to study the effect of the cold surface on the anti-frosting performance of the superhydrophobic coating and the impact con-tact behavior of droplets,a fluorine-based self-assembled superhydrophobic coating was sprayed on the surface of carbon fibers.Subsequently,the frosting,droplet icing and droplet contact behaviors of the sample on a semiconductor refrigeration table were observed visually,and the variation mechanisms of frost formation,droplet icing and droplet impact contact behaviors over time on the surface of superhydrophobic coat-ings were analyzed.Results showed that unlike ordinary surfaces,condensation droplets on superhydrophobic surfaces did not freeze at-5℃.At temperatures of-10,-15℃,the frost suppression effect of superhydrophobic surfaces was significantly better than that of ordinary sur-faces,with frost formation times delayed by 34 s and 22 s,respectively.Besides,the delayed freezing times of droplets on superhydrophobic surfaces at-5,-10,-15℃were 16 times,10 times and 9 times longer than those on ordinary surfaces,respectively.The maximum sprea-ding diameter of droplets after colliding with low-temperature superhydrophobic surfaces was the same at different temperatures.The droplet partially rebounded at-5℃and-10℃,and rebounded 11 times on the superhydrophobic surface at 25℃.
作者
杨京龙
邱超
YANG Jinglong;QIU Chao(Aviation Engineering College,Civil Aviation Flight University of China,Guanghan 618307,China;Key Laboratory of Icing and Anti/Deicing,China Aerodynamics Research and Development Center,Mianyang 621000,China)
出处
《材料保护》
CAS
CSCD
2024年第4期63-69,共7页
Materials Protection
基金
国家自然科学基金青年基金(52205238)
中国空气动力研究与发展中心结冰与防除冰重点实验室开放课题(IADL20220407)资助。
关键词
超疏水
抑霜
延迟结冰
液滴碰撞
superhydrophobic
anti-frosting
delayed icing
droplet impact
