Mechanically strong, stretchable and self-healable silicone elastomers with designed dynamic networks for exceptional self-adhesion under harsh conditions

作者：Shuai‐Chi Liu, Yutong Li, Yu‐Qing Qin, Ling Yang, Mengying Liu, Ji Liu, Yang Li, Cheng‐Fei Cao, Li‐Xiu Gong, Shi‐Neng Li, Guodong Zhang, Long‐Cheng Tang · 发表于：Advanced Industrial and Engineering Polymer Research · 年份：2025 · DOI：10.1016/j.aiepr.2025.05.003 · 被引用次数：5 · 研究领域：Polymer composites and self-healing、Advanced Sensor and Energy Harvesting Materials、Advanced Materials and Mechanics

Silicone elastomers with wide-temperature stability and excellent mechanical flexibility have attracted considerable interest in both academic and industrial fields. However, the highly cross-linked networks cannot self-heal and usually show poor adhesion to other substrates, limiting their sustainable applications in emerging fields. Developing self-adhesive organosilicon elastomers with high mechanical strength, superior stretchability, and exceptional self-healing performance remains a significant challenge. Herein, we propose a facile method to synthesize self-adhesive organosilicon elastomers with high mechanical strength, flexibility, and self-healing performance by designing dynamic networks. Specifically, multiple reversible physical and chemical bonds, such as disulfide bonds, hydrogen bonds, and Zn 2+ coordination bonds, are integrated into the organosilicon chains via click reactions, carboxylic acid-amine condensation, and ionic coordination. The optimized organosilicon elastomers exhibit exceptional stretchability and mechanical properties, including an elongation at break of ∼5600%, high strength (2.2 MPa), and toughness (54.38 MJ/m 3 ), outperforming traditional organosilicon elastomers. Additionally, the as-prepared elastomers demonstrate remarkable self-healing ability, with 80–93% healing efficiency at 25–60 o C, and excellent self-adhesion to various substrates (0.3–1.0 MPa on aluminum, steel, and wood). These properties are maintained under harsh condition...