高校化学工程学报2017，Vol.31Issue(3)：663-668,6.DOI:10.3969/j.issn.1003-9015.2017.00.027
凸起微结构对超疏水表面液滴弹跳强化机理的研究
Mechanism of Droplet Jumping Enhancement by Raised Structures on Superhydrophobic Surfaces
摘要
Abstract
Studies show that coalescence-induced droplet jumping on superhydrophobic surfaces (SHSs) can be enhanced by regulating the impact position of a liquid bridge on the substrate. Flat SHSs with only nanostructures and SHSs with raised structures (triangular prisms) were fabricated in this study. The dynamic behaviors of droplet jumping on flat SHSs were captured from both side and bottom view with a high-speed camera. Droplet jumping velocities were measured and the corresponding energy conversion efficiencies were calculated to investigate the effect of triangular prism on droplet jumping. The results show that the coalescence-induced droplet jumping process can be divided into four stages: (I) expansion of the liquid bridge between two droplets; (II) impact of the liquid bridge on the surface; (III) retraction of the droplet base area; (IV) deceleration of the coalesced droplet in the air. For droplet coalescence upon the superhydrophobic triangular prism, the droplet jumping velocities increase with the length of the triangular prism, while the height is kept constant until a maximum value is reached. The droplet jumping velocities also increase with the height of the triangular prism when the length is kept constant.关键词
液滴合并/超疏水/凸起微结构/弹跳强化Key words
droplet coalescence/superhydrophobic/raised structures/droplet jumping enhancement分类
能源科技引用本文复制引用
王凯,梁倩卿,姜睿,郑毅,白涛,兰忠,马学虎..凸起微结构对超疏水表面液滴弹跳强化机理的研究[J].高校化学工程学报,2017,31(3):663-668,6.基金项目
国家自然科学基金(21476037). （21476037）
