Improved healing potential of polymers containing double reversible non-covalent interactions: Linking molecular reversibility and macroscale healing

含有双可逆非共价相互作用的聚合物具有更高的愈合潜力：将分子可逆性与宏观愈合联系起来

• 批准号: 202599450
• 负责人: Professor Dr. Jürgen Popp
• 金额: --
• 依托单位: Institut für Organische Chemie und Makromolekulare Chemie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/202599450?language=en
• 关键词: Improved; healing; potential; polymers; containing

The introduction of supramolecular interactions (e.g., hydrogen bonding, metal-ligand interactions, ionic interactions) is a promising concept for self-healing polymers due to the high reversibility of these bonds. In this context, the project aims at combining, for the first time, two non-covalent interactions within one polymer system to create a self-healing material. For this purpose, the synthesis and characterization of three classes of polymers of expected high potential for self-healing will be performed: (i) of polymers containing negatively charged monomers (with small molar mass cationic counterions, ionomers), (ii) of polymers containing positively charged metal complexes (with small molar mass anionic counterions, reversible metallo-supramolecular polymers), and (iii) of polymer networks containing both the positively charged metal complexes and the anionic counterions. The properties and self-healing features of the three material classes will be investigated in detail using temperature changes as main trigger, besides irradiation by light and the application of redox-active metal complexes. The self-healing properties will be tailored by variation of the kind of the used metal-complex as well as the ratio and content of metal complexes and anionic monomers within the polymer system. The kinetics and degree of healing will be determined for both surface damage (scratches) and polymerpolymer interfaces (cracks). In order to design the material combinations and to understand the selfhealing processes, modelling and simulation will be integral parts of the project.

由于这些键的高可逆性，引入超分子相互作用（例如氢键、金属-配体相互作用、离子相互作用）对于自修复聚合物来说是一个有前途的概念。在这种背景下，该项目旨在首次将两种非共价相互作用结合在一个聚合物系统中，以创建一种自修复材料。为此，将进行三类预期高自修复潜力的聚合物的合成和表征：（i）含有带负电单体的聚合物（具有小摩尔质量阳离子抗衡离子，离聚物），（ii）含有带正电金属配合物的聚合物（具有小摩尔质量阴离子抗衡离子，可逆金属超分子聚合物），以及（iii） 含有带正电的金属络合物和阴离子抗衡离子的聚合物网络。除了光照射和氧化还原活性金属配合物的应用之外，还将以温度变化为主要触发因素，详细研究这三类材料的性能和自修复特性。自修复性能将通过所使用的金属配合物的种类以及聚合物体系内金属配合物和阴离子单体的比例和含量的变化来定制。将确定表面损伤（划痕）和聚合物界面（裂纹）的动力学和愈合程度。为了设计材料组合并了解自愈过程，建模和模拟将是该项目的组成部分。