EAGER: Dewetting dynamics at liquid/air interfaces

EAGER：液/气界面的去湿动力学

• 批准号: 2028571
• 负责人: Sushant Anand
• 金额: $ 11.37万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-06-15 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2028571&HistoricalAwards=false
• 关键词: EAGER; Dewetting; dynamics; liquid; air

Oil-water systems are commonplace and form the basis of numerous processes in industries such as pharmaceuticals, food, cosmetics, agrochemicals, and nanomaterials. Not all interactions between oil and water are beneficial, especially in situations such as oil spills in oceans. Although recent investigations have probed different facets of oil spillages, several questions remain unanswered. As an example, the process by which oil droplets impacting on the ocean surface eventually spread to form thin films is not well understood. This project will elucidate this process in detail using a combination of experiments and mathematical models. The proposed research is transformative as it has the potential to probe new pathways for oil spill proliferation, and it will shed light on involved processes that have been largely overlooked. The results should expand the understanding on oil spills by providing a comprehensive experimental data and a validated theoretical framework that can inform better containment strategies. The knowledge gained can be applied to other oil/water systems such as separation/extraction columns or thin films. The project's findings will be disseminated through outreach programs and presentations at national and international conferences. The aftermaths of a dewetting event at liquid-air interface by an oil droplet will strongly depend upon the chemical properties of these oils, the bulk liquid properties, and the presence of particles within these oil drops. Consequently, the research will use simulant clay particles with the auxiliary objective of devising a method to arrest the spreading. Post a dewetting event, the research will study the spreading behavior of oils in absence and presence of microparticles and such behavior will be quantified in the form of dimensionless groups to classify the predict behavior of the spreading oil. The data collected from this investigation should also help develop more accurate drop size distribution models. The investigation will touch upon diverse fields such as interfacial fluid science of thin liquid film/drops and synthesis of colloids. The possible control of dewetting by microparticles could also lead to methods for formulating Pickering emulsions which could then find novel uses within many disciplines.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

油水系统很常见，在制药、食品、化妆品、农用化学品和纳米材料等行业中构成了许多过程的基础。并不是所有的油和水之间的相互作用都是有益的，特别是在海洋石油泄漏等情况下。尽管最近的调查已经调查了漏油事件的不同方面，但仍有几个问题没有得到回答。例如，撞击海洋表面的油滴最终扩散形成薄膜的过程还不是很清楚。这个项目将使用实验和数学模型相结合的方法详细阐述这一过程。这项拟议的研究具有变革性，因为它有可能探索石油泄漏扩散的新途径，并将揭示在很大程度上被忽视的相关过程。通过提供全面的实验数据和经过验证的理论框架，可以为更好的遏制策略提供信息，这一结果应该会扩大对漏油的理解。所获得的知识可应用于其他油/水系统，如分离/萃取塔或薄膜。该项目的发现将通过外展计划和在国内和国际会议上的陈述来传播。油滴在液-气界面发生的脱湿事件的后果将很大程度上取决于这些油的化学性质、大块液体性质以及这些油滴中颗粒的存在。因此，这项研究将使用模拟粘土颗粒，辅助目标是设计一种方法来阻止扩散。除湿事件发生后，研究人员将研究油在无微粒和有微粒存在的情况下的扩散行为，并以无因次群的形式对这种行为进行量化，以对扩散油的预测行为进行分类。从这次调查中收集的数据也应该有助于开发更准确的液滴尺寸分布模型。该研究将涉及多个领域，如界面流体科学、液膜/液滴科学和胶体合成。对微粒除湿的可能控制也可能导致研制Pickering乳液的方法，然后在许多学科中找到新的用途。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。