SGER: Microrheology of Liquid-Liquid Interfaces

提案编号： CTS-0624011主要制造商：LENORE DAI机构： 德州理工大学SGER：该基金的目的是探索液-液界面的微观流变学。流变学在各种自然和工业过程中至关重要。 液-液界面的流变性在界面自组装、膜稳定性、乳液稳定性和润滑性中起着关键作用。 PI已经进行了概念验证实验，并证明了在油水界面进行单颗粒微观流变学的可行性。然而，这项研究仍然是探索性的，方法需要进一步验证。提出了以下具体目标：（1）评估探针颗粒与周围介质之间潜在的特定相互作用的影响，（2）用两种液体具有可比粘度的油-油界面代替油-水界面，（3）发展液-液界面的双颗粒微观流变学。预计拟议的工作，以验证液-液界面的微观流变学。虽然最初的概念验证实验是成功的和有前途的，有趣的初步结果表明，需要进一步的研究，以验证液-液界面的微观流变学。虽然这项研究的性质是探索性的和有风险的，但液-液界面微观流变学的验证将为科学和技术界开辟新的重要机会。 此外，这项研究将作为一个标准，应用微观流变学的其他二维系统，如膜，LB膜等，表现出复杂的异质性。建立这样一个标准是当务之急，否则单颗粒流变学应用于二维复杂问题可能会导致错误的结论。该补助金将支持研究生进行高级研究，并给予PI机会，将当代主题纳入工程实验的本科班。此外，PI将参加德克萨斯理工大学工程学院的教学培训学院项目，奥唐纳高中的一名科学教师将在2006年夏天与PI一起工作9周。

PROPOSAL NO.: CTS-0624011PRINCIPAL INVESTIGATORS: LENORE DAIINSTITUTION: TEXAS TECH UNIVERSITY SGER: MICRORHEOLOGY OF LIQUID-LIQUID INTERFACES The objective of this grant is to explore microrheology of liquid-liquid interfaces. Rheology is of critical importance in various natural and industrial processes. The rheology of liquid-liquid interfaces plays a critical role in interfacial self-assembly, membrane stability, emulsion stability, and lubrication. The PI has conducted proof-of-concept experiments and demonstrated the feasibility of doing single-particle microrheology at oil-water interfaces. However, the research remains exploratory and the methodology needs further validation. The following specific objectives are proposed: (1) evaluate the effect of potential specific interaction between the probe particle and the surrounding medium, (2) replace the oil-water interfaces with oil-oil interfaces where the two liquids have comparable viscosity, and (3) develop two-particle microrheology of liquid-liquid interfaces. The proposed work is anticipated to validate microrheology of liquid-liquid interfaces. Although initial proof-of-concept experiments were successful and promising, the intriguing preliminary results demonstrate the need for further investigation in order to validate microrheology of liquid-liquid interfaces. Although the nature of this investigation is exploratory and risky, the validation of microrheology at liquid-liquid interfaces will open new and important opportunities to the science and technology community. In addition, this research will serve as a standard for applying microrheology to other 2-D systems such as membranes, Langmuir-Blodgett films, etc. which exhibit complicated heterogeneity. There is urgency to establish such a standard otherwise the application of single-particle microrheology to 2-D complicated problems may lead to erroneous conclusions. The grant will support a graduate student to conduct advanced research and give the PI opportunities to incorporate a contemporary subject in an undergraduate class of Engineering Experimentation. In addition, the PI will participate the Teaching Training Institute program at the College of Engineering at Texas Tech and a science teacher from the O'Donnell High School, will work with the PI for 9 weeks in the summer of 2006.