Tough, self-adhesive and conductive hydrogels have recently attracted considerable interest due to their promising applications in electronic skins, wearable devices and flexible sensors. In this work, we designed a mussel-inspired nanocomposite hydrogel derived from water-soluble tannic acid/polyaniline coated cellulose nanocrystals (TA/PANI@CNCs) and various functional acrylic monomers. The incorporated TA/PANI@CNCs not only endowed the nanocomposite hydrogels with enhanced electrical conductive network and mechanical performance, but also played an important role in repeatable and durable adhesiveness to human skin without additional fixation. By taking the advantage of double networks based on various supramolecular interactions and dynamic borate ester bonds, the hydrogels exhibited a dramatic breaking strain of 974%, fracture stress of 759 kPa and rapid self-healing ability at room temperature without external stimuli. In addition, the as-prepared nanocomposite hydrogels had great strain sensitivity and excellent electrical conductivity, which can be employed as flexible strain sensors for tracking human body motion with a broad range of strain or directly assembled on other materials surfaces as electrical circuits. Compared with previous conductive hydrogels, this work will provide a novel pathway to fabricate nanocomposite hydrogels with self-healing, self-adhesive, strain sensitive and robust mechanical properties for potential applications in wearable strain sensors, flexible electrical interconnection and human motion monitoring.

坚韧，自粘和导电的水凝胶最近因在电子皮肤，可穿戴设备和柔性传感器中的应用前景而备受关注。在这项工作中，我们设计了一种以贻贝为灵感的纳米复合水凝胶，该水凝胶衍生自水溶性单宁酸/聚苯胺涂层的纤维素纳米晶体（TA / PANI @ CNCs）和各种功能性丙烯酸单体。掺入的TA / PANI @ CNCs不仅赋予纳米复合水凝胶增强的导电网络和机械性能，而且在无需额外固定的情况下在对人类皮肤的可重复性和持久粘合性方面也发挥了重要作用。通过利用基于各种超分子相互作用和动态硼酸酯键的双网络的优势，水凝胶显示出974％的惊人断裂应变，断裂应力为759 kPa，室温下具有快速的自愈能力，无外界刺激。另外，所制备的纳米复合水凝胶具有良好的应变敏感性和优异的导电性，可以用作柔性应变传感器，以大范围的应变追踪人体运动，或直接组装在其他材料表面作为电路。与以前的导电水凝胶相比，这项工作将为制造具有自修复，自粘，应变敏感和坚固机械性能的纳米复合水凝胶提供一条新颖的途径，可用于可穿戴应变传感器，柔性电互连和人体运动监测。所制备的纳米复合水凝胶具有很高的应变敏感性和优异的导电性，可以用作柔性应变传感器，以大范围的应变追踪人体运动，或者直接组装在其他材料表面作为电路。与以前的导电水凝胶相比，这项工作将为制造具有自修复，自粘，应变敏感和坚固机械性能的纳米复合水凝胶提供一条新颖的途径，可用于可穿戴应变传感器，柔性电互连和人体运动监测。所制备的纳米复合水凝胶具有很高的应变敏感性和优异的导电性，可以用作柔性应变传感器，以大范围的应变追踪人体运动，或者直接组装在其他材料表面作为电路。与以前的导电水凝胶相比，这项工作将为制造具有自修复，自粘，应变敏感和坚固机械性能的纳米复合水凝胶提供一条新颖的途径，可用于可穿戴应变传感器，柔性电互连和人体运动监测。可以用作柔性应变传感器，以跟踪人体在较大应变范围内的运动，也可以直接组装在其他材料表面作为电路。与以前的导电水凝胶相比，这项工作将为制造具有自修复，自粘，应变敏感和坚固机械性能的纳米复合水凝胶提供一条新颖的途径，可用于可穿戴应变传感器，柔性电互连和人体运动监测。可以用作柔性应变传感器，以跟踪人体在较大应变范围内的运动，也可以直接组装在其他材料表面作为电路。与以前的导电水凝胶相比，这项工作将为制造具有自修复，自粘，应变敏感和坚固机械性能的纳米复合水凝胶提供一条新颖的途径，可用于可穿戴应变传感器，柔性电互连和人体运动监测。