THEORETICAL STUDIES ON ELASTICITY OF MICROEMULSIONS

微乳液弹性的理论研究

• 批准号: 6240238
• 负责人: JIANSHI WU
• 金额: $ 6.51万
• 依托单位: FAYETTEVILLE STATE UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-08-01 至 1998-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6240238
• 关键词: elasticity; electric field; emulsions; mathematical model; mathematics; micelles; model design /development

Microemulsions, vesicles and cell membranes have self-assembling wall structures made of surfactant molecules. The understanding of their elastic properties is particularly important for the understanding of some life processes and pathological diseases on the microscopic level. However, the elastic property is far from being completely understood in a fundamental way. Among these systems, microemulsions are the simplest in structure, and therefore, are ideal for research. The elastic information about microemulsions will have profound implications for characterizing animate cell structures. The elastic property of microemulsions can be inferred through the measurements of their Electro-Optical Bifringence. The Kerr coefficients of the optical bifringence of the (water/AOT/oil) system have been extensively measured at Fayetteville State University. The experimental data show a phi2 - scaling behavior. No existing theory could properly explain these data collectively. It appears that a relevant theory will have to incorporate many-droplet correlation in presence of an electric field. We will: (1) use a dimer model to fit the experimental data and explore the origin of high alignment; (2) reconsider the data based on the structure of multiple-droplet clusters; (3) use the statistical theory of depletion force and Monte Carlo simulation to explore cluster formation in microemulsions. The principal investigator will closely collaborate with Dr. Matthew Edwards, the former experimentalist in the same subproject, at Spelman College, receive further experimental data from him and make suggestions to him for future experiments. For this subproject, pertaining to elasticity of microemulsions, the student trainees will be involved in all aspects of the research activities, including computer programming, and fitting the data. They will also help to prepare and present the results in papers and talks.

微乳液、囊泡和细胞膜具有自组装能力 由表面活性剂分子组成的壁结构。 的理解 它们的弹性特性对于 对一些生命过程和病理疾病的了解 微观层面。 但弹性性能远不及 从根本上完全理解。 其中 体系中，微乳液结构最简单， 因此，非常适合研究。关于弹性信息 微乳液对于表征具有深远的影响 使细胞结构充满活力。 微乳液的弹性特性可以 通过测量它们的电光可以推断出 双折射。光学双折射的克尔系数 （水/AOT/油）系统已在以下位置进行了广泛测量 费耶特维尔州立大学。实验数据显示 phi2 - 缩放行为。 现有的理论无法正确解释这些 数据集中。 看来必须要有一个相关的理论 在存在电场的情况下结合多液滴相关性。 我们将：（1）使用二聚体模型来拟合实验数据， 探索高度对齐的起源； (2)重新考虑数据基础 多液滴簇的结构； (3)利用统计 耗尽力理论和蒙特卡罗模拟探索 微乳液中簇的形成。 首席研究员 将与前任马修·爱德华兹博士密切合作 斯佩尔曼学院同一子项目的实验员获得 进一步向他提供实验数据并向他提出建议 以供将来的实验使用。 对于这个子项目，与弹性有关 微乳液的研究，学生学员将参与所有 研究活动的各个方面，包括计算机编程， 并拟合数据。 他们还将帮助准备和展示 论文和演讲的结果。