Water/polymer mixtures in hard and soft confinement

项目3的主题是硬约束和软约束下混合物的结构、动力学和相行为。从水/酒精混合物开始，我们将重点介绍水和聚合物的混合物。所采用的实验方法是静态和动态散射和介电松弛。软约束是由油包水微乳液的表面活性剂层提供的。这将与离子径迹蚀刻聚合物膜中定义良好的圆柱孔所提供的硬限制的结果进行比较。这将使我们能够直接观察到封闭墙对水/醇和水/聚合物混合物相行为的影响。将分析由壁势和禁闭动力学引起的贡献。作为聚合物溶于水的模型体系，我们将使用聚环氧乙烷和多肽。在后一种情况下，我们将研究禁闭中预期的构象变化。我们的目的是帮助理解空间约束对多组分体系的相行为和分子动力学及其与约束墙的耦合之间的相互作用。

The topic of project 3 is structure, dynamics and phase behavior of mixtures in hard and soft confinement. Starting with water/alcohol mixtures we will focus on mixtures of water and polymers. The experimental methods employed are static and dynamic scattering and dielectric relaxation. The soft confinement is provided by the surfactant layer of water-in-oil microemulsions. This is to be compared with results from the hard confinement as provided by well defined cylindrical pores in ion-track-etched polymer foils. This will enable us to directly observe the impact of the confining wall on the phase behavior of water/alcohol and water/polymer mixtures. The contributions arising from the wall potential and the dynamics of the confinement will be analysed. As a model system for polymers dissolved in water we will use polyethyleneoxide and polypeptides. In the latter case we will study the expected conformational change in confinement. Our aim is to contribute to an understanding of the interplay between spatial confinement on phase behavior and molecular dynamics of the multicomponent system and its coupling to the confining wall.