Zhao Gui, Zhou Yusai, Wang Jiayi, Wu Zhonghua, Wang Hong, Chen Hongyu
Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, Jiangsu, P. R. China.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Adv Mater. 2019 May;31(18):e1900363. doi: 10.1002/adma.201900363. Epub 2019 Mar 25.
Conventional self-healing is about the recovery of shape and mechanical properties. In contrast, recovery of functional properties is still a great challenge, especially for optical functional materials, as the known self-healing methods are incompatible with optical properties. By utilizing the synergistic effect between Au nanorods and vitrimer, the alignment of Au nanorods can be achieved in the crosslinked polymer. The optical properties of the resulting polarizing film, such as light transmittance and polarization degree, can be fully recovered without an external repair agent. With simple laser irradiation to induce the photothermal effect of Au nanorods, the shape-memory effect of vitrimer returns the Au nanorods to their initial orientation, and the plasticity achieves in situ self-healing of the cutting area. The self-healing of polarizing film provides a new research direction and reference for the application of self-healing systems in functional materials.
传统的自修复是指形状和机械性能的恢复。相比之下，功能特性的恢复仍然是一个巨大的挑战，特别是对于光学功能材料而言，因为已知的自修复方法与光学特性不兼容。通过利用金纳米棒与 Vitrimer 之间的协同效应，可以在交联聚合物中实现金纳米棒的排列。所得偏振膜的光学性能，如透光率和偏振度，无需外部修复剂即可完全恢复。通过简单的激光照射以诱导金纳米棒的光热效应，Vitrimer 的形状记忆效应使金纳米棒恢复到其初始取向，并且可塑性实现了切割区域的原位自修复。偏振膜的自修复为自修复系统在功能材料中的应用提供了新的研究方向和参考。
