Bicontinuous microemulsions in confinement - absorption into porous matrices, phase behavior and transport

该项目致力于研究无序介孔基质中双连续微乳液在几何约束下的结构和动力学。当双连续微乳液穿透介孔结构时，相行为会发生变化，从而微乳液的物理化学性质也会发生变化。在本项目中，将研究不同疏水性的多孔结构的润湿和渗透对双连续微乳液相行为的影响。将研究具有温度敏感相行为的三元相体系的微乳液以及以糖表面活性剂为基础的四元相体系的微乳液。亲水性和疏水性微乳液在这些孔中的传播，双连续微乳液在这些孔中的润湿行为，以及所形成的相行为之间的关系将被阐明。还将研究几何限制如何影响微乳液的临界行为，以及是否会导致微相分离。小角散射方法的使用，特别是中子小角散射和光学显微镜(特别是单分子局域显微镜)的使用，在介孔基质的结构解释中起着核心作用。在介孔环境中，微乳液的内部动力学也有望发生变化，这将用中子自旋回波谱进行研究。这将允许比较体积相、平面界面和内部孔道基质中的动力学。

The proposed project is dedicated to the investigation of bicontinuous microemulsions in disordered mesoporous matrices with respect to their structure and dynamics within the geometric constraints. When a bicontinuous microemulsion penetrates a mesoporous structure, a change in the phase behaviour and thus a change in the physicochemical properties of the microemulsions is expected. In this project the influence of wetting and penetration of porous structures of different hydrophobicity on the phase behaviour of bicontinuous microemulsions will be studied. Microemulsions of ternary phase systems with a temperature sensitive phase behaviour as well as microemulsions of quaternary phase systems based on sugar surfactants will be investigated. The relationship between the propagation in hydrophilic and hydrophobic pores, the wetting behaviour of the bicontinuous microemulsions within these pores and the phase behaviour that develops will be clarified. It will also be investigated how the geometric restriction affects the critical behaviour of the microemulsions and whether microphase separation is induced. The use of small angle scattering methods, especially neutron small angle scattering and optical microscopy (especially single molecule localization microscopy) plays a central role in the structural elucidation within the mesoporous matrices. Within the mesoporous environment a change in the inner dynamics in the microemulsions is also expected, which will be investigated by using neutron spin echo spectroscopy. This will allow a comparison of the dynamics in the volume phase, at planar interfaces and inside pore matrices.