降落对亚毫米结构表面的影响,其湿行为不同.
Jiangen Wu1, Jun Zou1, Haojun Ma1
1Sino-German College of Intelligent Manufacturing, Shenzhen Technology University, Shenzhen 518118, China.
Langmuir : the ACS journal of surfaces and colloids
|October 9, 2023
概括
亚毫米表面结构增强滴滴冲击稳定性,用于疾病控制和喷墨印刷等应用. 增加表面的水友性抑制了喷,并控制了这些坚固的结构上的滴水行为.
科学领域:
- 表面科学和材料工程 表面科学和材料工程
- 流体动力学 流体动力学
- 纳米技术和微型制造
背景情况:
- 滴滴冲击动态对于传染病控制,喷墨印刷和防冰技术至关重要.
- 表面的湿透性和微观结构显著影响滴滴的行为.
- 与微观结构相比,亚毫米结构提供了优越的抗损伤能力,确保了稳定的滴水冲击性能.
研究的目的:
- 为了研究滴滴撞击行为在亚毫米结构的聚甲基 (PDMS) 表面与量身定制的湿性质.
- 评估结构参数 (高度,间距) 和表面湿透度对滴滴喷和沉积的影响.
- 为了确定液体分离中滴滴冲击效应的稳定,长期应用的潜力.
主要方法:
- 制造PDMS表面,具有不同的亚毫米柱子尺寸和表面湿透度.
- 对水滴撞击动态的实验分析,包括喷,反弹和沉积.
- 表面性质的表征和与观察到的滴滴行为的相关性.
主要成果:
- 与平面相比,亚毫米结构的表面对滴滴喷的敏感性增加.
- 增强的表面水友性有效地抑制了这些结构表面的喷.
- 增加的亚毫米柱高度和减少的间距提高了关键的韦伯数,表明对喷的阻力更大.
- 超的表面促进滴滴撞击和随后的沉积由于毛细血管力.
结论:
- 亚毫米结构为控制滴水冲击动态提供了一个强大的平台.
- 表面水友性是减轻喷和指导结构表面滴滴行为的一个关键参数.
- 这些发现支持使用亚毫米结构表面用于稳定和高效的流体分离应用.
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