Tough adhesion between soft and wet materials is important to many applications in medicine and engineering. Examples include implants, wound dressing, and soft machines. Recent work has highlighted a general principle: tough adhesion can be realized through the synergy of interlink and toughener. Here we develop an adhesive double-network hydrogel to achieve tough adhesion through noncovalent interlinks and covalent tougheners. We show that the noncovalent interlinks can be strong enough to unzip many covalent tougheners. Adhesion energy above 500 J/m² is achieved. Interplay between noncovalent interlinks and covalent tougheners provides new possibilities for toughening mechanism. This work will guide material designs for tough adhesion, as well as contribute to fundamental mechanics of adhesion.

柔软和湿润材料之间的牢固粘合对于医学和工程学中的许多应用都很重要。示例包括植入物，伤口敷料和软机。最近的工作强调了一个总的原理：可以通过互连和增韧剂的协同作用实现坚韧的粘合。在这里，我们开发了一种胶粘剂双网状水凝胶，可通过非共价键和共价增韧剂实现强韧性。我们表明，非共价交联键的强度足以解压缩许多共价增韧剂。实现了高于500 J / m ^2的粘合力。非共价链接和共价增韧剂之间的相互作用为增韧机理提供了新的可能性。这项工作将指导材料设计实现牢固的附着力，并为附着力的基本机理做出贡献。