Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada, J1K 2R1.
Macromol Rapid Commun. 2013 Nov;34(22):1742-6. doi: 10.1002/marc.201300640. Epub 2013 Oct 29.
A general method for very fast and efficient optical healing of crystalline polymers is reported. By loading a very small amount of gold nanoparticles (AuNPs) in either poly(ethylene oxide) (Tm ≈ 63 °C) or low-density polyethylene (Tm ≈ 103 °C), the heat released upon surface plasmon resonance (SPR) absorption of 532 nm light by AuNPs can melt crystallites in the interfacial region of two polymer pieces brought into contact; and the subsequent recrystallization of polymer chains on cooling merges the two pieces into one. The fracture strength of such repaired sample can reach the level of the undamaged polymer after 10 s laser exposure. Moreover, in addition to an ability of long-distance remote and spatially selective healing, the optical method also works for polymer samples immersed in water.
本文报道了一种用于快速高效修复结晶聚合物的通用方法。通过在聚氧化乙烯（Tm ≈ 63°C）或低密度聚乙烯（Tm ≈ 103°C）中负载少量的金纳米粒子（AuNPs），AuNPs 吸收 532nm 光的表面等离子体共振（SPR）吸收所释放的热量可以使接触界面处的两个聚合物片的结晶融化；冷却时聚合物链的再结晶将两个部分融合成一个整体。经过 10 秒激光照射后，这种修复样品的断裂强度可以达到未损坏聚合物的水平。此外，除了远距离远程和空间选择性修复的能力外，该光学方法还适用于浸入水中的聚合物样品。
