Das Nikita, Maity Chandan
(Organic)Material Science and Engineering Laboratory, Department of Chemistry, School of Advanced Sciences, and Centre for Nanobiotechnology (CNBT), Vellore Institute of Technology (VIT), Vellore campus, Vellore, Tamil Nadu, 632014, India.
Small. 2024 Oct;20(42):e2403512. doi: 10.1002/smll.202403512. Epub 2024 Jul 16.
As sustainable and eco-friendly replacements to conventional paper, rewritable paper is a very attractive alternative for communication, information circulation, and storage. Development is made for rewritable paper using chromogenic materials that change its color in presence of external stimuli. However, the new techniques have faced several major challenges including feasible operational method, eco-friendly approach. Herein, a simple, convenient, and eco-friendly strategy is described for the preparation of rewritable paper substrate, and multi colored ink for efficient use in writing, painting or printing purpose. In addition, writing with "invisible ink" on the rewritable paper can be realized for potential anti-counterfeiting application. The written, painted, or printed information on the paper substrate can be easily erased using an aqueous solution. Thus, the original paper can be retrieved and the paper substrate can be reused multiple times. Besides, the written or printed information can be retained for a prolonged time at ambient conditions. Overall, this approach shows the rewritable paper as a prototype of multicolor writing/painting application, offering a sustainable solution for reducing paper waste and promoting environmental stewardship.
作为传统纸张的可持续且环保的替代品，可重写纸对于通信、信息流通和存储来说是一种非常有吸引力的选择。人们利用在外部刺激下会改变颜色的显色材料来开发可重写纸。然而，这些新技术面临着几个主要挑战，包括可行的操作方法、环保方法。在此，描述了一种简单、方便且环保的策略，用于制备可重写纸基材以及用于书写、绘画或印刷目的的高效使用的多色墨水。此外，可在可重写纸上用“隐形墨水”书写，以实现潜在的防伪应用。纸张基材上书写、绘制或印刷的信息可以很容易地用水溶液擦除。因此，可以找回原始纸张，并且纸张基材可以多次重复使用。此外，书写或印刷的信息在环境条件下可以长时间保留。总体而言，这种方法展示了可重写纸作为多色书写/绘画应用的原型，为减少纸张浪费和促进环境管理提供了一种可持续的解决方案。
