Structure Formation in Thin Liquid-Liquid Films

液-液薄膜中的结构形成

• 批准号: 167121686
• 负责人: Professor Dr. Ralf Seemann
• 金额: --
• 依托单位: Weierstraß-Institut für Angewandte Analysis und Stochastik (WIAS)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/167121686?language=en
• 关键词: Structure; Formation; Thin; Liquid; Films

The main topic of this tandem proposal is the direct comparison of results from mathematical modeling, analysis and experimental investigations of rupture, dewetting dynamics and equilibrium patterns of a thin liquid-liquid system. The experimental system uses a PS (polystyrene)/PMMA(polymethylmethacrylate) thin bilayer of a few hundred nm, whose liquid properties can be tuned from Newtonian to visoelastic rheological flow behavior by varying the length of the polymer chains. On these small scales, apart from capillary forces and viscous dissipation intermolecular forces will play an important role in the dynamics and morphology of interfaces. The mathematical analysis and numerical simulation of adequate thin film models that will be derived from the underlying fluid mechanical equations, will be used, through direct comparisons with experiments, to clarify even fundamental properties, such as equilibrium contact angles, singularity formation or dewetting rates. This shall form the basis for more complex situations involving evaporation, surfactant monolayers, and slippage, to yield the understanding crucial for many important nanofluidic problems in nature and technology ranging from rupture of the human tear film to the interface dynamics of donor/acceptor polymer solutions used in organic solar cells.

这串联建议的主要议题是直接比较的结果从数学建模，分析和实验研究的破裂，脱湿动力学和平衡模式的薄液-液系统。实验系统使用的PS（聚苯乙烯）/PMMA（聚甲基丙烯酸甲酯）薄双层的几百nm，其液体性质可以从牛顿的粘弹流变流动行为通过改变聚合物链的长度进行调谐。在这些小尺度上，除了毛细力和粘性耗散外，分子间力将在界面的动力学和形态中起重要作用。数学分析和数值模拟适当的薄膜模型，将来自基本的流体力学方程，将被用来，通过与实验直接比较，以澄清甚至基本属性，如平衡接触角，奇点形成或去湿率。这将形成更复杂的情况下，涉及蒸发，表面活性剂单层，和滑移的基础上，产生的理解至关重要的许多重要的nanofluidic问题的性质和技术，从人类泪膜破裂的有机太阳能电池中使用的供体/受体聚合物溶液的界面动力学。