Klein Michael, Fesser Patrick, Zechel Stefan, Hager Martin D, Schubert Ulrich S
Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743, Jena, Germany.
Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany.
Chemistry. 2025 Mar 20;31(17):e202404267. doi: 10.1002/chem.202404267. Epub 2025 Feb 12.
This current study focusses on the investigation of the self-healing abilities of metallopolymers containing different kinds of metal complexes, which were processed by direct digital light processing (DLP) based three-dimensional (3D) printing. For this purpose, 2-phenoxyethyl acrylate is mixed with ligand-containing monomers either based on triphenylmethyl(trt)-histidine or terpyridine, respectively. Either zinc(II) or nickel(II) salts are successfully applied for a complexation of the ligand monomers in solution and, subsequently, photopolymerization is performed. The thermo-mechanical properties of the obtained metallopolymers were characterized by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) as well as dynamic mechanical thermal analysis (DMTA). Multiple damages with defined forces ranging from 20 to 1500 mN were introduced into the 3D-structures and successfully healed within 24 h at 70 °C or 120 °C, respectively without losing the structural integrity of the overall 3D-structures. Herein, excellent healing efficiencies up to 97 % were determined. Consequently, these hollow structures not only feature very good self-healing abilities but also excellent retention of the 3D-structure at and above the healing temperature.
本研究聚焦于对含不同金属配合物的金属聚合物自修复能力的研究，这些金属聚合物是通过基于直接数字光处理（DLP）的三维（3D）打印工艺制备的。为此，将丙烯酸2-苯氧基乙酯分别与基于三苯甲基（trt）-组氨酸或三联吡啶的含配体单体混合。锌（II）盐或镍（II）盐成功用于溶液中配体单体的络合，随后进行光聚合反应。通过差示扫描量热法（DSC）、热重分析（TGA）以及动态热机械分析（DMTA）对所得金属聚合物的热机械性能进行了表征。在3D结构中引入了力范围为20至1500 mN的多次损伤，并分别在70℃或120℃下于24小时内成功修复，且未丧失整个3D结构的结构完整性。在此，测定了高达97%的优异修复效率。因此，这些中空结构不仅具有非常好的自修复能力，而且在修复温度及以上时能出色地保持3D结构。
