Department of Chemistry, University of California, Riverside, California 92521, USA.
Nat Commun. 2014 Dec 2;5:5459. doi: 10.1038/ncomms6459.
The invention of paper as writing materials has greatly contributed to the development and spread of civilization. However, its large-scale production and usage have also brought significant environment and sustainability problems to modern society. To reduce paper production and consumption, it is highly desirable to develop alternative rewritable media that can be used multiple times. Herein we report the fabrication of a rewritable paper based on colour switching of commercial redox dyes using titanium oxide-assisted photocatalytic reactions. The resulting paper does not require additional inks and can be efficiently printed using ultraviolet light and erased by heating over 20 cycles without significant loss in contrast and resolution. The legibility of prints can retain over several days. We believe this rewritable paper represents an attractive alternative to regular paper in meeting the increasing global needs for sustainability and environmental protection.
纸作为书写材料的发明极大地促进了文明的发展和传播。然而，它的大规模生产和使用也给现代社会带来了重大的环境和可持续性问题。为了减少纸张的生产和消耗，人们非常希望开发出可重复使用的替代可重写媒体，可以多次使用。在这里，我们报告了一种基于商业氧化还原染料的颜色转换的可重写纸的制备，该染料使用二氧化钛辅助光催化反应。所得到的纸不需要额外的墨水，并且可以使用紫外线高效打印，并且可以通过加热在 20 次循环以上擦除，而不会导致对比度和分辨率明显降低。打印的清晰度可以保留数天。我们相信，这种可重写纸是一种有吸引力的选择，可以替代普通纸，以满足全球对可持续性和环境保护日益增长的需求。
