Amphiphilic self-organization of non-invasively orthogonally switchable block copolymers

该项目的重点是两亲性嵌段共聚物的诱导自组织。两种嵌段的亲水性或疏水性特征可以通过非侵入性刺激，即通过改变温度或用UV光照射来可逆地且彼此独立地控制。根据分子参数（如化学结构和块的大小），应研究温度变化或辐照后的结构形成和转换行为，无论是在水溶液中还是在薄膜中。为了实现这一点，必须合成新的二嵌段共聚物，其中嵌段的亲水性或疏水性可以独立地通过温度，特别是通过光诱导过程来反转。将使用现代光谱和散射方法详细研究其结构以及跨越相界时的结构变化，并将体积行为与薄膜中的体积行为进行比较。

The project focuses on the induced self-organization of amphiphilic block copolymers. The hydrophilic or hydrophobic character of both blocks can be controlled reversibly and independently from each other by means of non-invasive stimuli, namely by change of temperature or irradiation with UV-light. In dependence on the molecular parameters (like chemical structure and size of the blocks), structure formation and switching behavior upon change of temperature or after irradiation shall be studied both, in volume in aqueous solution and in thin films. To enable this, new diblock copolymers have to be synthesized, in which the hydrophilicity or hydrophobicity of the blocks can be inverted independently by temperature- and especially by light-induced processes. The structures as well as the structural changes upon crossing the phase boundaries will be investigated in detail using modern spectroscopic and scattering methods and thevolume behavior will be compared with that in thin films.