State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, China.
Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.
Adv Sci (Weinh). 2024 Nov;11(42):e2410446. doi: 10.1002/advs.202410446. Epub 2024 Sep 16.
The rapid advancement in attractive platforms such as biomedicine and human-machine interaction has generated urgent demands for intelligent materials with high strength, flexibility, and self-healing capabilities. However, existing self-healing ability materials are challenged by a trade-off between high strength, low elastic modulus, and healing ability due to the inherent low strength of noncovalent bonding. Here, drawing inspiration from human fibroblasts, a monomer trapping synthesis strategy is presented based on the dissociation and reconfiguration in amphiphilic ionic restrictors (7000-times volume monomer trapping) to develop a eutectogel. Benefiting from the nanoconfinement and dynamic interfacial interactions, the molecular chain backbone of the formed confined domains is mechanically reinforced while preserving soft movement capabilities. The resulting eutectogels demonstrate superior mechanical properties (1799% and 2753% higher tensile strength and toughness than pure polymerized deep eutectic solvent), excellent self-healing efficiency (>90%), low tangential modulus (0.367 MPa during the working stage), and the ability to sensitively monitor human activities. This strategy is poised to offer a new perspective for developing high strength, low modulus, and self-healing wearable electronics tailored to human body motion.
吸引人的平台如生物医学和人机交互的快速发展，对高强度、高弹性和自修复能力的智能材料提出了迫切需求。然而，由于非共价键固有的低强度，现有的自修复能力材料在高强度、低弹性模量和修复能力之间存在着权衡。在这里，受人类成纤维细胞的启发，提出了一种基于两亲性离子限制剂中解离和重排的单体捕获合成策略（7000 倍体积单体捕获），以开发共晶凝胶。得益于纳米约束和动态界面相互作用，形成的受限域的分子链主链得到机械增强，同时保留了柔软的运动能力。所得到的共晶凝胶表现出优异的机械性能（比纯聚合深共晶溶剂高 1799%和 2753%的拉伸强度和韧性）、优异的自修复效率（>90%）、低切向模量（工作阶段为 0.367 MPa），以及对人体活动的敏感监测能力。这种策略有望为开发针对人体运动的高强度、低模量和自修复可穿戴电子产品提供新的视角。
