Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, MOE Key Laboratory of Cluster Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China.
J Am Chem Soc. 2022 Sep 14;144(36):16389-16394. doi: 10.1021/jacs.2c03511. Epub 2022 Aug 30.
Adhesives are applied extensively in daily life and industries, and people have developed numerous commercial polymeric adhesives. However, in most cases, these adhesives work on dry surfaces in air and form permanent bonds with the substrates, limiting the applications of adhesives. Inspired by the innate adhesive functions of some animals, such as geckos, spiders, mussels, and clingfish, scientists have developed various adhesive compositions and structures to meet various conditions. Here, we show a versatile subnanometer nanowire (SNW) adhesive with high strength and great reversibility, which could be prepared at a large scale through a facile room-temperature reaction. The SNW adhesive contacts the substrates at multiple sites due to the ultrahigh flexibility, and meanwhile, the multilevel interactions among the SNWs endow them with strong cohesion, so they exhibit good adhesive performance. This adhesive is applicable to various substrates, such as metals, polymers, and glass, and not only possesses good stability at room temperature in air but also is suitable for underwater environments and ultralow temperatures. Moreover, this adhesive could be easily recycled and removed from the substrates without any residue and damage. The SNW adhesive not only inspires the design of hierarchical adhesive structures with new contact modes but also has potential for practical applications.
胶粘剂在日常生活和工业中得到广泛应用，人们已经开发出许多商业用聚合物胶粘剂。然而，在大多数情况下，这些胶粘剂在干燥的空气中作用于表面，并与基底形成永久性的结合，限制了胶粘剂的应用。受一些动物（如壁虎、蜘蛛、贻贝和吸盘鱼）先天的粘附功能的启发，科学家们已经开发出各种具有不同用途的胶粘剂组成和结构。在这里，我们展示了一种具有高强度和高可逆性的多功能亚纳米线（SNW）胶粘剂，它可以通过简单的室温反应在大规模制备。由于超高的柔韧性，SNW 胶粘剂可以在多个位置与基底接触，同时，SNWs 之间的多层次相互作用赋予它们很强的内聚力，因此它们表现出良好的粘附性能。这种胶粘剂适用于各种基底，如金属、聚合物和玻璃，不仅在室温下的空气中具有良好的稳定性，而且适用于水下环境和超低温环境。此外，这种胶粘剂可以很容易地从基底上回收和去除，而不会留下任何残留物和损坏。SNW 胶粘剂不仅为具有新接触模式的分层粘附结构设计提供了灵感，而且具有实际应用的潜力。
