State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Sci Rep. 2017 Feb 7;7:42232. doi: 10.1038/srep42232.
Paper, as one of the most important information carriers, has contributed to the development and transmission of human civilization greatly. Meanwhile, a serious problem of environmental sustainable development caused by the production and utilization of paper has been resulted to modern society. Therefore, a simple and green route is urgently demanded to realize rewritable painting on paper. Herein, a simple route to rewritable painting on copy paper has been demonstrated by using eco-friendly ZnO nanoparticles (NPs) as fluorescent ink, and vinegar and soda that are frequently used in kitchen as erasing and neutralizing agents. Words or patterns written using the ZnO NPs as ink can be erased by vinegar vapour within five seconds, and after a neutralizing process in the ambient of soda vapour, the paper can be used for writing again. It is worth noting that the resolution and precision of the patterns produced via the above route degrade little after ten rewriting cycles, and the quality of the patterns produced using the ZnO NPs as ink fades little after being storage for several months, which promises the versatile potential applications of the rewriting route proposed in this paper.
纸张作为最重要的信息载体之一，为人类文明的发展和传播做出了巨大贡献。与此同时，纸张的生产和使用给现代社会带来了严重的环境可持续发展问题。因此，人们迫切需要一种简单、绿色的途径来实现纸张的可重写绘画。在这里，我们展示了一种在普通复印纸上进行可重写绘画的简单途径，使用环保型的 ZnO 纳米粒子（NPs）作为荧光墨水，以及厨房中常用的醋和苏打作为擦除和中和试剂。使用 ZnO NPs 作为墨水书写的文字或图案可以在五秒钟内被醋蒸汽擦除，并且在苏打蒸汽的环境中进行中和处理后，纸张可以再次用于书写。值得注意的是，经过十次重写循环后，通过上述方法生成的图案的分辨率和精度几乎没有下降，并且使用 ZnO NPs 作为墨水生成的图案在储存数月后质量也几乎没有下降，这预示着本文提出的重写途径具有广泛的应用潜力。
