Coordination Funds

协调基金

• 批准号: 510862232
• 负责人: Professor Dr. Sebastian Seiffert, Ph.D.
• 金额: --
• 依托单位: Department Chemie
• 依托单位国家: 德国
• 项目类别: Research Units
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/510862232?language=en
• 关键词: Coordination; Funds

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.

两亲性聚合物凝胶是由具有亲水和疏水部分的聚合物网络组成的。它们具有良好的性能，对环境介质的极性有微妙的依赖性，如环境敏感的粘弹性和选择性渗透性。然而，为了真正开发这一应用潜力，有必要了解网络纳米和微结构之间的相互作用以及由此产生的凝胶特性。网络结构具有多个层次的复杂性，从网状尺度上的局部连通性缺陷开始，更大尺度上的网络不均匀，以及更大尺度上潜在的微相分离的域。这些结构部分是在网络合成过程中永久赋予的，部分是进一步适应当前实验条件的。我们的研究目标是在制备条件、由此产生的网络结构和由此产生的凝胶性能之间获得合理的理解，主要集中在它们的粘弹性力学和渗透性上。这是通过采用模型网络合成的TETRA-PEG法来制备两种类型的两亲性模型网络：不可逆交联型和可逆交联型。然后，根据它们在多个长度尺度上的结构以及它们的粘弹性和渗透性来表征这些网络。所有这些都是通过理论和实验的协同衔接来完成的。