Self-Assembly of Amphiphilic Polymers and Polymer/Surfactant Systems at Interfaces, Comparative Study of Solid/Liquid and Air/Liquid Interfaces

研究了表面活性剂与聚电解质在界面处的相互作用以及界面间空间约束的影响。该项目旨在更好地理解这样一个问题，即在水介质中，聚电解质和带相反电荷的表面活性剂之间的协同相互作用如何受到带电或不带电界面的影响。特别是，对于固定底物附近的聚电解质/表面活性剂配合物，聚电解质-表面活性剂、聚电解质-底物和表面活性剂-底物之间相互作用的竞争尚不清楚。具体而言，将研究反离子交换在聚集体形成过程中的意义。此外，还需要澄清聚电解质/表面活性剂复合物是否以及在何种条件下与带电表面结合，以及在此结合过程中是否存在反离子。为了澄清这些问题，将通过量热法研究聚电解质链、表面活性剂和底物表面之间的相互作用。吸附层的结构要用反射测量法来表征。从项目的核心方面研究了表面活性剂/聚电解质水溶液的独立薄膜，以及介孔二氧化硅玻璃腔中聚电解质/表面活性剂的聚集。

The interaction between surfactants and polyelectrolytes at interfaces and under the influence of the spatial confinement between interfaces will be investigated. The project aims at a better understanding of the question, how the cooperative interaction between polyelectrolytes and opposite charged surfactants in aqueous media is influenced by the presence of a charged or uncharged interface. In particular, for polyelectrolyte/surfactant complexes near a fixed substrate the competition between the interactions of the type polyelectrolyte-surfactant, polyelectrolyte-substrate, and surfactant-substrate is not well understood. Specifically, the significance of the counter ion exchange in the aggregate formation process will be studied. Furthermore it is to be clarified whether and under which conditions polyelectrolyte/surfactant-complexes are bound to charged surfaces and whether the counter ions in this binding process. To clarify these questions, the interaction between polyelectrolyte chains, surfactant and substrate surfaces will be studied by calorimetric measurements. The structure of the adsorbed layers is to be characterized by reflectometry measurements. Investigations in thin free-standing films of aqueous surfactant/polyelectrolyte solutions, as well as polyelectrolyte/surfactant aggregates in the cavities of mesoporous silica glasses from central aspects of the project.