Nanostructured smart polymer materials with adaptive / responsive adhesion properties

附着力的控制对于许多工业过程、医疗保健应用、日常使用等都非常重要。根据应用领域的不同，人们致力于制造具有低附着力或强附着力的材料。然而，设计具有可逆可切换/可控制附着力的“智能”表面仍然是一项极具挑战性的任务。这种材料对于从微电子到制药和医疗应用的许多应用都非常重要。该项目旨在开发新的可切换系统的合成路线，基于在平面和粗糙表面上开发的混合聚合物刷子，以及作为其更坚固的类似物的轻度交联型嵌段共聚物的薄膜。这种新的“智能”材料将能够根据它们所应用的衬底来自我调整其粘合行为。设计和研究基于二元刷子的可切换1和可适应2胶粘剂被认为是首要目标。在这里，我们将寻找一种在外部刺激(溶剂、pH、温度等)下表现出最显著的开关和适应性行为的聚合物组合。作为实验工作的补充，将进行计算机模拟，以研究混合聚合物刷子的动力学和亚稳定状态。第二，在制度上实施粗糙度可以带来特殊的好处。因此，我们将系统地研究表面形貌图案和粗糙度(微米和/或纳米结构)对可切换/自适应表面特性的影响。由于聚合物刷的机械稳定性较差，因此使用聚合物刷的限制之一是相对较短的“寿命”，因此第三个目标是基于轻微交联的嵌段共聚物膜来制造机械坚固的“智能”表面。破坏和移除这种薄膜最上层的纳米结构将恢复具有相同性质的底层(“自我修复”效应)。

Control of adhesion is very important for many industrial processes, health care applications, everyday usage, etc. Many efforts were directed towards fabrication of materials with either low or strong adhesion depending on the field of application. However, design of “smart” surfaces with reversibly switchable/controllable adhesion is still a highly challenging task. Such materials can be of great importance for numerous applications ranging from microelectronics to pharmaceutical and medical applications. The project aims to develop synthetic routes to new switchable systems based on mixed polymer brushes developed on flat and rough surfaces and films of lightly cross-linked block copolymers as their more robust analogous. The new “smart” materials will be able to self-tune their adhesion behaviour depending on the substrate to which they are applied. Design and investigation of switchable1 and adaptable2 adhesives based on binary brushes is considered as a first goal. Here, we will be looking for a combination of polymers demonstrating the most pronounced switching and adaptive behaviour under external stimuli (solvent, pH, temperature, etc.). Complementary to the experimental work computer simulations to study the dynamics and meta-stable states of mixed polymer brushes will be performed. Second, special benefits are expected from implementation of roughness in system. Thus, we will systematically investigate the effect of surface topographical patterns and roughness (micro- and/or nano-structuring) on switchable/adaptable surface properties. Since one of the limitations of use of polymer brushes is relatively small “life time” due to their rather poor mechanical stability, the third aim is the fabrication of mechanically robust “smart” surfaces based on lightly cross-linked block copolymer films. Destruction and removing of the nanostructures from the topmost layer of such films will recover underlying layers with identical properties (“self-repairing” effect).