Yang Ding, Zhao Jiahui, Liu Fang-Yu, Chen Meng, Qu Da-Hui
Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
Chem Sci. 2025 Apr 23. doi: 10.1039/d5sc01404b.
Supramolecular chemistry empowers polymeric materials with versatile beneficial features encompassing stimulus adaptation, self-healing, to truly function in a biomimetic manner. To seek an effective self-healing mechanism for current polymers with no trade-offs in other property perspectives still remains a challenge. Herein, we present a sustainable alternative to the conventional covalent elastomers, a dynamic covalent disulfide polymer highly crosslinked by bio-catechol hydrogen bonds and coordinative metallic dopants. The polymeric elastomer exhibits mechanical tailorability, ambient intrinsic self-healing with an efficiency reaching 90%, and closed-loop recycling capability with no property deterioration. The assembled microstructured capacitive pressure sensor possesses a sensitivity up to 1.58 kPa, an effective working range up to 35 kPa and an exceptional response time of a few milliseconds, which makes it particularly promising for contemporary wearable devices for a spectrum of applications like physiological monitoring and voice-cancelling communication.
超分子化学赋予聚合材料多种有益特性，包括刺激适应性、自我修复能力，使其能够以仿生方式真正发挥作用。在不影响其他性能的前提下，为当前聚合物寻找一种有效的自我修复机制仍然是一项挑战。在此，我们提出了一种替代传统共价弹性体的可持续材料，即一种通过生物儿茶酚氢键和配位金属掺杂剂高度交联的动态共价二硫聚合物。这种聚合弹性体具有机械可定制性、室温下高达90%的固有自我修复效率以及闭环回收能力，且性能不会下降。组装后的微结构电容式压力传感器灵敏度高达1.58 kPa，有效工作范围高达35 kPa，响应时间仅为几毫秒，这使其在生理监测和语音消除通信等一系列应用的当代可穿戴设备中具有特别广阔的应用前景。
