Control of Mixing Driven by Coalescence of Sessile Drops

固着液滴聚结驱动的混合控制

• 批准号: 1264552
• 负责人: Shelley Anna
• 金额: $ 35万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-15 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1264552&HistoricalAwards=false
• 关键词: Control; Mixing; Driven; Coalescence; Sessile

This proposal will address issues of sessile droplet coalescence, such as what role does asymmetries in bulk fluid properties, contact angle, and drop size have on mixing in two drops coalescing on a surface, and what different effects could occur when the surfaces are either homogeneous or heterogeneous. The work will use a testing platform, in which specimen drop and satellite drops of reagent are allowed to mix. The research plan is organized into three Objectives. In the first the PIs aim to investigate the effects of properties, contact angle and size on coalescence in homogeneous surfaces. The second objective will consider interfacial tension asymmetry, and the third will examine coalescence in more interesting surfaces, including superhydrophobic substrates.This proposal has a strong, clearly developed research plan that, if successful, can have a technologically broad impact since many applications such as spray coating and inkjet printing rely on the coalescence of drops on surfaces. Control over these mixing patterns during coalescence can lead to new applications that take advantage of this control including medical diagnostic platform based on the merging of a central target specimen drop with several satellite drops containing reagents. The proposal also includes educational broad impact through developing and teaching new graduate-level courses, supervising students, and outreach programs.

该提案将解决固着液滴聚结的问题，例如在本体流体性质、接触角和液滴大小中的不对称性对在表面上聚结的两滴中的混合有什么作用，以及当表面是均质的或非均质的时可能发生什么不同的影响。这项工作将使用一个测试平台，其中允许样本滴和试剂卫星滴混合。研究计划分为三个目标。在第一个PI的目的是调查的性质，接触角和尺寸的影响，在均匀的表面聚结。第二个目标将考虑界面张力的不对称性，第三个目标将研究更有趣的表面（包括超疏水基底）中的聚结。这一提议有一个强大的、明确的研究计划，如果成功，可能会产生广泛的技术影响，因为许多应用，如喷涂和喷墨打印，都依赖于表面上液滴的聚结。在聚结期间对这些混合模式的控制可以导致利用这种控制的新应用，包括基于中心目标样本液滴与含有试剂的若干卫星液滴的合并的医学诊断平台。该提案还包括通过开发和教授新的研究生课程，监督学生和推广计划来产生广泛的教育影响。