Dynamics of Spontaneous Emulsification in Microchannels

微通道中自发乳化的动力学

• 批准号: 2223988
• 负责人: Thomas Cubaud
• 金额: $ 35.96万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2223988&HistoricalAwards=false
• 关键词: Dynamics; Spontaneous; Emulsification; Microchannels

This award will investigate the basic multiphase flow properties of mixtures made of oil, water, and organic solvents at small scales. The phenomenon of spontaneous emulsification refers to the natural formation of droplets due to the presence of a miscible solvent in oil-water systems and offers great opportunities for tailoring the properties of soft materials and developing innovative methods for the treatment of oil and aqueous products in a range of industries, including pharmaceutical, personal care, food, energy, and in the environment. While the multiphase flow behavior of pure substances is relatively well understood, less is known about the influence of fluid additives, which significantly alter material properties and flow arrangements. Here, an integrated suite of teaching and research activities is designed to unravel the physics of multiphase flows in the presence of miscible solvents and develop new predictive knowledge into an array of captivating fluid phenomena of fundamental and practical interests. This award will provide a wide range of educational opportunities for a diversity of students in an inclusive and well-structured environment and original outreach activities will stimulate the curiosity of the public at large.This award will formulate the relationships between material properties and liquid-liquid multiphase flows using advanced microfluidic protocols. A series of hypothesis-driven inquiries will quantitatively elucidate various microscale transport phenomena resulting from the addition of miscible solvents, such as alcohols, in immiscible liquid-liquid multiphase flows. Alcohols compose an important class of simple organic compounds with a myriad of practical uses as extractants, antiseptics, detergents, biofuels, wetting agents, viscosity modifiers, or emulsifiers. The proposed research will lay the scientific foundations for improved manipulations of aqueous-oil multiphase flows with alcohol solvents and characterize out-of-equilibrium fluid interactions resulting from the interplay of interfacial tension and diffusion phenomena in microflow geometries. Functional relationship of flow pattern characteristics will be established across a broad range of solvent concentration for both ‘water-in-oil’ and ‘oil-in-water’ multiphase flows. Interfacial phenomena leading to the generation of colloidal dispersions at ultralow interfacial tension will be methodically accessed over vast ranges of length-scales and timescales using well-characterized microgeometries and leading-edge imaging and diagnostic techniques. Broad variations of flow velocity and fluid properties will delineate significant regions of uncharted flow regimes and enable opportunities for scientific discoveries. Ultimately, a general, unifying theoretical framework will be developed to characterize the role of liquid solubility on the fundamentals of multiphase flows.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.

该奖项将调查小尺度上由油，水和有机溶液制成的混合的基本多相流。赞助商乳化的现象是指由于油水系统中存在可混杂的解决方案而导致的液滴的自然形成，并为量身定制软材料的特性并开发了用于处理油和水性产品的创新方法，以在包括药品，个人护理，食品，食物，食物，食物，食物，环境以及环境中的一系列行业。虽然纯物质的多相流动行为相对众所周知，但对流体添加剂的影响却较少，从而显着改变了材料特性和流动排列。在这里，一套综合的教学和研究活动套件旨在揭示在有混血的解决方案的存在下流动的物理，并将新的预测知识发展成一系列迷人的基本和实践利益的流体现象。该奖项将为包容性和结构良好的环境中的各种学生提供广泛的教育机会，而原始的外展活动将刺激公众在整个广阔的好奇心。该奖项将使用先进的微流体协议来制定材料属性与液体液体多相流之间的关系。一系列假设驱动的查询将定量阐明由于不混溶的液体液体多相流中的添加可混杂的溶液（例如醇）而导致的各种微观传输现象。醇构成一类重要的简单有机化合物，并具有无数实际用途，作为提取物，防腐剂，确定，生物燃料，润湿剂，粘度修饰剂或乳化剂。拟议的研究将奠定科学基础，以改善对酒精溶液的水性多相流的操纵，并表征由界面张力的相互作用和微流层中的扩散现象相互作用而导致的不平衡流体相互作用。流动模式特性的功能关系将在“油中”和“水中油”多相流的广泛溶液浓度上建立。界面现象，导致在超大界面张力下产生胶体分散体的产生，将有条不紊地在长度尺度和时间尺度上使用良好的特征化的微地球镜以及前沿成像和诊断技术进行访问。流速度和流体特性的广泛变化将描绘出未知流程度的重要区域，并为科学发现带来机会。最终，将开发一个统一的一般统一的理论框架，以表征液体溶解度在多相流的基础上的作用。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响评估标准来评估值得支持。