Coordination Funds

两亲性聚合物凝胶由具有亲水和疏水部分的聚合物网络组成。它们具有良好的性能，对环境介质极性具有微妙的依赖性，例如环境敏感的粘弹性和选择性渗透性。然而，为了真正利用这种应用潜力，有必要了解网络纳米和微观结构之间的相互作用以及由此产生的凝胶特性。网络结构具有多层次的复杂性，从局部连通性缺陷的网格规模，网络不均匀性在更大的尺度上，甚至更大的尺度上的微相分离域。这些结构部分地在网络合成期间永久地赋予，部分地进一步适应当前的实验条件。我们的研究计划的目标是获得合理的理解之间的制备条件，所产生的网络结构，并尚未产生的凝胶性能，主要集中在其粘弹性力学和渗透性。这是通过调整的四-PEG方法的模型网络合成制备两种类型的两亲模型网络：不可逆和可逆交联。然后，这些网络的特点是鉴于其结构上的多个长度尺度，并鉴于其粘弹性渗透性能。所有这一切都是通过理论和实验的协同融合来完成的。

Amphiphilic polymer gels are composed of a polymer network with both hydrophilic and hydrophobic parts. They feature favorable properties with delicate dependency on the environmental medium polarity, such as environmentally sensitive viscoelasticity and selective permeability. To truly exploit this potential for applications, however, it is necessary to understand the interplay between the network nano- and microstructure and the resulting gel properties. The network structure features multiple levels of complexity, starting from local connectivity defects on the mesh scale, network inhomogeneities on larger scales, and potentially microphase-separated domains on even larger scales. These structures are partly imparted permanently during the network synthesis and partly further adaptable to the current experimental conditions. Our research initiative targets at gaining rational understanding between the preparation conditions, the resulting network structures, and the yet resulting gel properties, primarily focusing on their viscoelastic mechanics and permeabilities. This is done by adaption of the tetra-PEG approach for model-network synthesis to preparing amphipilic model networks of two kinds: irreversibly and reversibly crosslinked. These networks are then characterized in view of their structures on multiple lengthscales and in view of their viscoelastic an permeation properties. All that is done by synergistic convergence of theory and experiment.