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，我们将重点关注水和聚合物的混合物。实验方法有静态散射、动态散射和介质弛豫。油包水微乳的表面活性剂层提供了软约束。这将与离子轨迹蚀刻聚合物箔中定义良好的圆柱形孔所提供的硬约束结果进行比较。这将使我们能够直接观察围壁对水/酒精和水/聚合物混合物相行为的影响。本文将分析由壁势和约束动力学引起的贡献。作为溶解在水中的聚合物的模型系统，我们将使用聚氧化物和多肽。在后一种情况下，我们将研究约束中预期的构象变化。我们的目的是有助于理解空间约束对多组分体系相行为和分子动力学的相互作用及其与约束壁的耦合。

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.