van den Dungen Eric T A, Loos Ben, Klumperman Bert
Department of Chemistry and Polymer Science, Stellenbosch University Private Bag X1, Matieland 7602, South Africa.
Macromol Rapid Commun. 2010 Apr 6;31(7):625-8. doi: 10.1002/marc.200900728. Epub 2009 Dec 29.
An important category of self-healing materials relies on the release of a healing agent from a capsule upon the occurrence of damage to the material. Visualization of the release of the healing agent is difficult to accomplish. Here we show that a profluorophore can successfully be used to visualize the local release of a healing agent in a self-healing coating. A tetra-functional thiol compound encapsulated in nanocapsules or microcapsules is dispersed in a poly(methyl acrylate) film, in which the profluorophore is molecularly dispersed. A strong fluorescence signal is observed when a cut is introduced in the film. This fluorescence provides clear evidence that the capsules rupture locally during the introduction of a cut. In a more general sense, it proves that profluorophores can be very useful in materials science.
一类重要的自愈材料依赖于材料受损时愈合剂从胶囊中释放出来。愈合剂释放的可视化很难实现。在此我们表明，一种前体荧光团可成功用于可视化自愈涂层中愈合剂的局部释放。封装在纳米胶囊或微胶囊中的四官能硫醇化合物分散在聚（丙烯酸甲酯）薄膜中，其中前体荧光团以分子形式分散。当在薄膜中引入切口时，会观察到强烈的荧光信号。这种荧光提供了明确的证据，表明在引入切口时胶囊会在局部破裂。从更普遍的意义上讲，它证明了前体荧光团在材料科学中可能非常有用。
