U.S.-Germany Cooperative Research on the Equilibrium and Dynamic Behavior of Systems Containing a Zwitterionic Surfactant

这个奖项支持教授克拉伦斯A。米的米勒 大学与海因茨霍夫曼教授合作， 物理化学系 拜罗伊特，德国。 他们将进行联合研究， 表面活性剂体系的平衡和动力学性质 这将建立和加强他们正在进行的独立工作， 关于表面活性剂动力学。 两个实验室将共享 确定体系平衡相态的工作 含有纯形式的特定两性离子表面活性剂 加上各种碳氢化合物和直链醇。 然后 每个实验室将进行适合其 阐明系统中其他行为的专用设备 含有相同的两性离子表面活性剂， 化学和物理条件。 米勒博士的实验室 将使用视频显微镜来研究 当表面活性剂溶液接触油时发生。 博士 霍夫曼在德国的实验室将测量流变学， 电双折射和其它动态响应特性 对于许多系统的纯相。 这些技术 从未应用于L3阶段。 比较结果 与理论模型相结合， 了解这一阶段的微观结构。 这项联合工作的总目标是获得一个 更好地理解表面活性剂体系中的某些相， 特别是所谓的L3相，即各向同性液相 其发生在各种表面活性剂体系中， 条件完全不同于那些普通胶束 找到解决方案。合作者还将研究 层状液晶相，其广泛存在于 水含量的范围，并推测具有广泛的 流变行为 关于这一阶段的形态 德国测量的物理性质数据 应该更好地理解 新的相，如层状液晶，形成在 表面活性剂水溶液之间的初始界面， 油 这样的知识将有多种实用 应用.

This award supports Professor Clarence A. Miller of Rice University to collaborate with Professor Heinz Hoffmann of the Physical Chemistry Department of the University of Bayreuth, Germany. They will carry out joint research on equilibrium and dynamic properties of surfactant systems that will build on and enhance their ongoing independent work on surfactant dynamics.. The two laboratories will share the work of determining equilibrium phase behavior of systems containing a particular zwitterionic surfactant in pure form plus various hydrocarbons and straight-chain alcohols. Then each laboratory will conduct experiments suited to its specialized equipment to elucidate other behavior in systems containing the same zwitterionic surfactant under different chemical and physical conditions. Dr. Miller's laboratory will use videomicroscopy to investigate the dynamic behavior that occurs when surfactant solutions contact oil. Dr. Hoffmann's laboratory in Germany will measure rheological, electric birefringence and other dynamic response properties of pure phases for a number of systems. Such techniques have never been applied to the L3 phase. Comparing the results with theoretical models is sure to advance fundamental understanding of the microstructure of this phase. The general objective of this joint work is to obtain a better understanding of certain phases in surfactant systems, especially the so-called L3 phase, an isotropic liquid phase which occurs in a variety of surfactant systems under conditions quite different from those where ordinary micellar solutions are found. The collaborators will also examine the lamellar liquid crystalline phase, which exists over a wide range of water content and presumably has a wide range of rheological behavior. Relating the morphology of this phase to the data on physical properties from the German measurements should provide a better understanding of the manner in which new phases, such as the lamellar liquid crystal, form at the initial interface between aqueous surfactant solutions and oil. Such knowledge will have a variety of practical applications.