Property Changes of Multiphasic Fluids by Geometrical Confinement in Advanced Mesoporous Materials

限制在纳米尺寸多孔几何结构中的流体表现出相应的块体系统中所没有的独特的性质。因此，它们值得广泛关注，因为它们具有很高的技术创新潜力。在这方面，已鼓励科学界改进纳米受限液体的基础知识。在过去的十年里，当流体被限制在介孔介质中时，人们已经研究了大量的物理化学性质。总的来说，表面-液体相互作用的性质和约束的几何参数很容易影响相行为、结构、动力学和流体流动，从而导致原始的物理化学现象。该领域的下一步将是以所需的方式指导纳米流体的(新)性质。许多被研究的系统只有一个被限制在“被动”多孔材料中的流体相，这被视为此类发展的瓶颈。因此，纳米液体项目的目的是探索新系统的特性，这种新系统将允许基于多组分流体的纳米限制对界面进行前所未有的控制，从而形成具有周期性表面化学变化的功能化多孔材料。从考察体相二元体系的介观结构和动力学出发，探索限制在定制介孔介质中的混合物的物理化学性质。特别是微相分离、气体溶解性增强和限制引起的流体流变性变化等效应以及这些现象的相互作用将是研究的重点。这些研究只有结合大量实验和数值物理和化学方面的互补方法和技能才有可能，包括从分子到宏观尺度的时间和空间窗口，并为拟议的法德合作提供强大的附加值。

Fluids confined in nanometer-size porous geometry exhibit unique properties that have no equivalent in the corresponding bulk systems. As such, they deserve an extensive interest for their high potential of technological innovation. In this context, the scientific community has been encouraged to improve the ground basis knowledge of nanoconfined liquids. During the last decade, an impressive number of physico-chemical properties have been studied when confining a fluid in a mesoporous medium. As a whole, it appears that the nature of the surface-liquid interaction and the geometric parameters of confinement readily affect the phase behavior, structure, dynamics and fluid flow, leading to original physico-chemical phenomena.The next step in the field would be to direct the (new) properties of nanofluids in a desired manner. Many of the studied systems comprised a single fluid phase confined in a ‘passive’ porous material, which is seen as a bottleneck to such developments. For this reason, the intension of the NanoLiquids project, is to explore the properties of new systems that would allow for an unprecedented control of interfaces based on the nanoconfinement of multicomponent fluids into functionalized porous materials with periodically alternating surface chemistry. Starting from examinations of the mesoscale structure and dynamics of the bulk binary systems the physico-chemical properties of mixtures confined in tailored mesoporous media shall be explored. In particular effects such as microphase separation, enhanced gas solubility and confinement-induced changes in the fluid rheology as well as the interplay of these phenomenologies will be in the research focus. These studies will be possible only by the combination of an extensive number of complementary methods and skills in physics and chemistry, both experimental and numerical, encompassing temporal and spatial windows that range from the molecular to the macroscopic scales and provide a strong added value to the proposed French-German collaboration.