Chen Kun, Liang Kewei, Liu He, Liu Ruonan, Liu Yiying, Zeng Sijia, Tian Ye
College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, 110169, People's Republic of China.
Foshan Graduate School of Innovation, Northeastern University, Foshan, 528300, People's Republic of China.
Nanomicro Lett. 2023 Apr 13;15(1):102. doi: 10.1007/s40820-023-01084-8.
Multifunctional supramolecular ultra-tough bionic e-skin with unique durability for human-machine interaction in complex scenarios still remains challenging. Herein, we develop a skin-inspired ultra-tough e-skin with tunable mechanical properties by a physical cross-linking salting-freezing-thawing method. The gelling agent (β-Glycerophosphate sodium: Gp) induces the aggregation and binding of PVA molecular chains and thereby toughens them (stress up to 5.79 MPa, toughness up to 13.96 MJ m). Notably, due to molecular self-assembly, hydrogels can be fully recycled and reprocessed by direct heating (100 °C for a few seconds), and the tensile strength can still be maintained at about 100% after six recoveries. The hydrogel integrates transparency (> 60%), super toughness (up to 13.96 MJ m, bearing 1500 times of its own tensile weight), good antibacterial properties (E. coli and S. aureus), UV protection (Filtration: 80%-90%), high electrical conductivity (4.72 S m), anti-swelling and recyclability. The hydrogel can not only monitor daily physiological activities, but also be used for complex activities underwater and message encryption/decryption. We also used it to create a complete finger joint rehabilitation system with an interactive interface that dynamically presents the user's health status. Our multifunctional electronic skin will have a profound impact on the future of new rehabilitation medical, human-machine interaction, VR/AR and the metaverse fields.
具有独特耐久性的多功能超分子超韧性仿生电子皮肤，在复杂场景下实现人机交互仍具有挑战性。在此，我们通过物理交联盐冻融法开发了一种具有可调机械性能的受皮肤启发的超韧性电子皮肤。胶凝剂（β - 甘油磷酸钠：Gp）诱导聚乙烯醇（PVA）分子链聚集和结合，从而使其 toughens （应力高达5.79兆帕，韧性高达13.96兆焦/平方米）。值得注意的是，由于分子自组装，水凝胶可通过直接加热（100℃几秒钟）完全回收和再加工，经过六次回收后拉伸强度仍可保持在约100%。该水凝胶兼具透明度（>60%）、超高韧性（高达13.96兆焦/平方米，承受自身拉伸重量的1500倍）、良好的抗菌性能（大肠杆菌和金黄色葡萄球菌）、紫外线防护（过滤率：80% - 90%）、高电导率（4.72西门子/米）、抗溶胀性和可回收性。这种水凝胶不仅可以监测日常生理活动，还可用于水下复杂活动以及信息加密/解密。我们还利用它创建了一个完整的手指关节康复系统，该系统带有一个动态呈现用户健康状况的交互界面。我们的多功能电子皮肤将对新型康复医学、人机交互、虚拟现实/增强现实以及元宇宙领域的未来产生深远影响。 （注：原文中“toughens them”这里的“toughens”可能有误，推测应该是“toughen”，但按照要求未做修改，直接翻译了。）
