Mak-Iad Chaninya, Bertossi Luca, Formon Georges J M, Weder Christoph
Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland.
NCCR Bio-inspired Materials, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland.
ACS Macro Lett. 2025 Jul 15;14(7):996-1003. doi: 10.1021/acsmacrolett.5c00317. Epub 2025 Jun 30.
Metallosupramolecular polymers (MSPs), formed through ligand-metal coordination, feature dynamic bonds that enable damage repair reversible dissociation. Here, we report the synthesis of healable MSPs by modifying commercially available glycol-modified polyethylene terephthalate (PETG), an amorphous commodity polyester known for its durability, chemical resistance, and formability. The new materials were accessed through the Zn-catalyzed transesterification of PETG with ethylene glycol, end-functionalization of the resulting homobifunctional oligomers with the 2,6-bis(1'-methylbenzimidazolyl)pyridine (Mebip) ligand, and subsequent assembly of these macromonomers into MSPs Zn complexation. One of the MSPs made offers an attractive combination of high tensile strength (31 MPa), high Young's Modulus (1 GPa), and excellent healability (94% in 2.5 min).
金属超分子聚合物（MSPs）通过配体-金属配位形成，具有能够实现损伤修复（可逆解离）的动态键。在此，我们报告了通过对市售的二醇改性聚对苯二甲酸乙二酯（PETG）进行改性来合成可自愈的MSPs，PETG是一种无定形商品聚酯，以其耐用性、耐化学性和可成型性而闻名。通过锌催化PETG与乙二醇的酯交换反应、用2,6-双（1'-甲基苯并咪唑基）吡啶（Mebip）配体对所得同双功能低聚物进行末端官能化，以及随后将这些大分子单体组装成MSPs（锌络合）来获得新材料。所制备的一种MSP具有高拉伸强度（31 MPa）、高杨氏模量（1 GPa）和优异自愈性（2.5分钟内可达94%）的诱人组合。
