Department of Chemistry, University of California, Irvine, California 92697, United States.
J Am Chem Soc. 2015 Apr 15;137(14):4846-50. doi: 10.1021/jacs.5b01601. Epub 2015 Apr 1.
Polymers that repair themselves after mechanical damage can significantly improve their durability and safety. A major goal in the field of self-healing materials is to combine robust mechanical and efficient healing properties. Here, we show that incorporation of sacrificial bonds into a self-repairable network dramatically improves the overall mechanical properties. Specifically, we use simple secondary amide side chains to create dynamic energy dissipative hydrogen bonds in a covalently cross-linked polymer network, which can self-heal via olefin cross-metathesis. We envision that this straightforward sacrificial bonding strategy can be employed to improve mechanical properties in a variety of self-healing systems.
具有自修复能力的聚合物可以显著提高其耐用性和安全性。自修复材料领域的一个主要目标是结合坚固的机械性能和高效的修复性能。在这里，我们表明，在自修复网络中引入牺牲键可以显著提高整体机械性能。具体来说，我们使用简单的仲酰胺侧链在共价交联聚合物网络中形成动态能量耗散氢键，该氢键可以通过烯烃交叉复分解进行自修复。我们设想，这种简单的牺牲键合策略可以用于提高各种自修复系统的机械性能。
