Photothermally induced scratch healing effects of thermoplastic nanocomposites with gold nanoparticles
Photothermally induced scratch healing effects of thermoplastic nanocomposites with gold nanoparticles
复制标题
含金纳米粒子的热塑性纳米复合材料的光热诱导划痕愈合效果
DOI：
10.1016/j.compscitech.2016.07.032
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发表时间：
2016-09
影响因子：
9.1
通讯作者：
Wang, Rongguo
中科院分区：
文献类型：
--
作者：
Yang, Fan;Jiao, Weicheng;Liu, Wenbo;Wang, Rongguo
报道了一种制备具有光引发自修复能力的热塑性涂料的新方法。利用金纳米粒子（Au NPs）的光热效应产生的局部加热，可以有效地修复普通热塑性涂层。少量的Au NP成功地分散到涂层中。一旦涂层表面出现划痕，可以使用激光照射Au纳米颗粒以产生大量的热量，通过光热效应显著提高局部温度。它会熔化聚合物并形成局部变形，以有效地合并划痕。已经证实，含有Au NPs的涂层具有愈合能力。愈合后，表面形貌和力学性能得到恢复。对修复机制进行了初步探讨，发现Au纳米粒子含量和辐照强度在修复过程中起关键作用。通过调整这两个元件，最大温升可达225.5 °C。对多种类型的热塑性涂料（PAA、PVAc、PS和TPU）进行了愈合测试，并且还实现了重复愈合。
A novel method for providing thermoplastic coatings with light-triggered self-healing ability is reported. Normal thermoplastic coatings can be healed efficiently via local heating generated by photothermal effect of gold nanoparticles (Au NPs). Small amounts of Au NPs were successfully dispersed into the coatings. Once the scratch occurred in the coating surface, a laser could be used to illuminate Au NPs to generate a large amount of heat which dramatically increased the local temperature through the photothermal effect. It would melt the polymer and form local deformation to merge the scratch efficiently. It had been confirmed that the coating containing Au NPs had the healing ability. After healing, the surface morphology and the mechanical property were recovered. The mechanism of the healing was also investigated and it was found that the Au NPs content and irradiation intensity played the key roles in the healing process. Through adjusting these two elements, the maximum temperature rise could achieve 225.5 °C. Healing tests were carried out on multiple types of thermoplastic coatings (PAA, PVAc, PS and TPU) and repeated healing was also achieved.
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