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Droplet detachment behavior from a rough hydrophilic surface
Journal of Aerosol Science ( IF 4.5 ) Pub Date : 2020-01-01 , DOI: 10.1016/j.jaerosci.2019.105469 C.T. Wang , W.T. Leung , J.C. Xu , S.C. Fu , Christopher Y.H. Chao
Journal of Aerosol Science ( IF 4.5 ) Pub Date : 2020-01-01 , DOI: 10.1016/j.jaerosci.2019.105469 C.T. Wang , W.T. Leung , J.C. Xu , S.C. Fu , Christopher Y.H. Chao
Abstract Understanding of the droplet detachment behavior from rough hydrophilic surfaces is important in many biological and industrial applications such as biomedicine, surface coating, and pathogen-laden aerosol resuspension. Due to the partial detachment of the droplet on hydrophilic surfaces, leaving behind some droplet residues, the adhesion behavior is extremely complicated. Here we reveal a new adhesion mechanism between a droplet and a rough hydrophilic surface. The adhesion behavior is controlled by a liquid film stuck in the surface microstructure. We establish a model to describe the contributions of liquid film and naked solid peaks, to the work of adhesion and verify the model experimentally. We also find that the normal adhesion force is about 3.35 ± 0.25 times of the lateral adhesion force for different surface roughness, meaning that the separation direction is an important factor affecting adhesion due to the different separation mechanisms. The results of this work shed new insights on the understanding of droplet detachment and adhesion to a rough surface.
中文翻译:
粗糙亲水表面的液滴脱离行为
摘要 了解粗糙亲水表面的液滴脱离行为在许多生物和工业应用中很重要,例如生物医学、表面涂层和载有病原体的气溶胶再悬浮。由于液滴在亲水表面部分脱离,留下一些液滴残留物,粘附行为极其复杂。在这里,我们揭示了液滴和粗糙的亲水表面之间的新粘附机制。粘附行为由粘附在表面微结构中的液膜控制。我们建立了一个模型来描述液膜和裸露固体峰对粘附工作的贡献,并通过实验验证了该模型。我们还发现,对于不同的表面粗糙度,法向附着力约为横向附着力的 3.35±0.25 倍,这意味着由于不同的分离机制,分离方向是影响附着力的重要因素。这项工作的结果为理解液滴脱离和粗糙表面的粘附提供了新的见解。
更新日期:2020-01-01
中文翻译:
粗糙亲水表面的液滴脱离行为
摘要 了解粗糙亲水表面的液滴脱离行为在许多生物和工业应用中很重要,例如生物医学、表面涂层和载有病原体的气溶胶再悬浮。由于液滴在亲水表面部分脱离,留下一些液滴残留物,粘附行为极其复杂。在这里,我们揭示了液滴和粗糙的亲水表面之间的新粘附机制。粘附行为由粘附在表面微结构中的液膜控制。我们建立了一个模型来描述液膜和裸露固体峰对粘附工作的贡献,并通过实验验证了该模型。我们还发现,对于不同的表面粗糙度,法向附着力约为横向附着力的 3.35±0.25 倍,这意味着由于不同的分离机制,分离方向是影响附着力的重要因素。这项工作的结果为理解液滴脱离和粗糙表面的粘附提供了新的见解。