This work presents a novel self-healing polyurethane (Upy-PU) that strikes a remarkable balance between ultra-fast room-temperature self-healing and excellent mechanical properties. The representative material, Upy-PU1 after healing at room temperature, exhibits impressive tensile stress (7.8 MPa), extraordinary tensile strain (2379%), and excellent toughness (67.1 MJ/m3) by incorporating the rarely reported Upy-diols into the polyurethane backbone. The healing process can complete in just 30 min with the help of a minimal quantity of solvent. Intriguingly, beverages like beer, wine and Chinese baijiu can also accelerate the room temperature self-healing process, making it more feasible in practical applications. Furthermore, a thin film electrode based on Upy-PU1 demonstrates the ability to maintain electrical conductivity under 300% elongation and restores stable low electric resistance within 200% elongation after 1 h self-healing at room temperature. Notably, at 4.5 V, a conductive circuit can recover the conductivity from cutting within 5 min. These findings highlight the immense potential of Upy-PUs for applications in wearable electronics and soft robotics.

中文翻译：

---

透明、无色、超快室温自修复聚氨酯，具有自修复电极潜力


这项工作提出了一种新型自修复聚氨酯（Upy-PU），它在超快的室温自修复和优异的机械性能之间取得了显着的平衡。代表性材料Upy-PU1在室温下愈合后，通过将罕见报道的Upy-二醇掺入聚氨酯中，表现出令人印象深刻的拉伸应力（7.8 MPa）、非凡的拉伸应变（2379%）和优异的韧性（67.1 MJ/m3）骨干。借助最少量的溶剂，愈合过程只需 30 分钟即可完成。有趣的是，啤酒、葡萄酒和白酒等饮料也可以加速室温自愈过程，使其在实际应用中更加可行。此外，基于Upy-PU1的薄膜电极表现出在300%伸长率下保持导电性的能力，并在室温下自愈1小时后在200%伸长率内恢复稳定的低电阻。值得注意的是，在 4.5 V 电压下，导电电路可以在 5 分钟内从切割中恢复导电性。这些发现凸显了 Upy-PU 在可穿戴电子产品和软机器人领域应用的巨大潜力。