Surface engineering through chemical & topographical manipulation and drop dynamics on such surfaces

通过化学进行表面工程

• 批准号: 349704-2007
• 负责人: Amirfazli, Alidad
• 金额: $ 2.91万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Accelerator Supplements
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=431067
• 关键词: Surface; engineering; through; chemical; topographical

Nature provides examples of surface engineering in Lotus leaves that are self-cleaning when rain drops roll on these leaves. This amazing self-cleaning property is due to surface topography, chemistry and drop motion. Understanding the physics of drop motion on solid surfaces and what can facilitate or hinder this motion at early stages of movement along with how and what can be done to a surface chemically or topographically to manipulate drop movement are the subjects of this proposal. The implications of understanding above issues is not only of academic interest, but also of industrial applications; e.g., engineered surfaces for fuel cell can allow drop shedding in channels to avoid their flooding resulting in enhanced efficiency, or condensers that operate in drop-wise rather than film condensation mode, which will have much improved performance.

大自然提供了荷叶表面工程的例子，当雨滴在这些叶子上滚动时，它们会自我清洁。这种惊人的自清洁特性是由于表面形貌、化学和液滴运动。了解固体表面上的液滴运动的物理学，以及在运动的早期阶段什么可以促进或阻碍这种运动，沿着如何以及可以对表面进行化学或地形学处理以操纵液滴运动是本提案的主题。理解上述问题的含义不仅具有学术意义，而且具有工业应用价值;例如，用于燃料电池的工程表面可以允许在通道中的液滴脱落，以避免它们的溢流，从而导致效率提高，或者允许冷凝器以液滴方式而不是膜冷凝模式操作，这将具有大大改进的性能。