Entnetzungsphänomene und Stabilität von dünnen Filmen aus Polymeren mit perfluorierten Substituenten

该项目旨在研究具有过氟侧链的聚合物薄膜的稳定性和结构。这对于纺织品和聚合物的防油、防水、防土涂层以及涂层技术本身具有重要的实际意义。我们最近的研究表明，半氟化聚合物经历了一层一层的自疏脱湿。这种现象是由熵上有利的主链卷曲和能量上有利的侧链排列之间的相互作用控制的。将系统地研究聚合物结构、膜厚度和与基质相互作用对脱湿过程的影响。因此，将制备一系列具有可结晶全氟烷基侧链和内在无序全氟聚醚侧链的线性聚合物。除了目前的研究之外，将开发一种基于半氟化聚合物溶液表面的水冷凝模式玻璃化的聚合物薄膜微图图化新技术。这种方法可以制备具有100到10000纳米周期性的六角形图案。

This project is directed towards stability and structure of thin films of polymers with perflorinated side chains. This is of practical importance for oil-, water and soil repellent coatings for textiles and polymers as well as for the coating technology itself. Our recent study has shown that semifluorinated polymers undergo layer-by-layer autophobic dewetting. This phenomenon is controlled by interplay between entropically favorable coiling of the backbone and energetically favored ordering of the side chains. Film stability and kinetics of the dewetting process will be studied systematically in dependence of the polymer structure, film thickness and interaction with the substrate. Hereby, a series of linear polymers with cristallizable perfloroalkyl side chains and intrinsically disordered perfluoroligoether side chains will be prepared. In addition to the current research, a new technique for micropatterning of thin polymer films will be developed based on vitrification of the water condensation pattern on a surface of a semifluorinated polymer solution. This approach allows preparation of a hexagonal pattern with a periodicity ranging from 100 to 10000 nm.