Rewritable paper (RP) which takes advantages of stimuli-responsive color-changing materials/smart materials and can be used multiple times has been demonstrated to hold potential to reduce human waste of paper and alleviate the increasingly severe environmental issues. To make the RP closer to the way that people are accustomed to reading and more practical for daily life, interest and effort toward smart materials with clearly visible or naked-eye color-switching properties are particularly important. In this review, depending upon the stimulation protocol, five types of stimuli (thermo-, water-related-, light-, stress-, and electric-field-) smart chromogenic materials and systems with visible color switching applied in light absorptive display for RP are focused on. In each section, different stimulus-chromic molecules and their corresponding systems are discussed to explore the design concepts, methodologies, working mechanisms, and pros and cons of various chromogenic materials used in light absorptive RP. In addition, the challenges and prospects are sketched to provide strategies to explore more smart materials for high-performance RP and its relative techniques.

中文翻译：

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用于光吸收可重写纸的智能材料：变色机制和结构设计

可重写纸（RP）利用刺激响应变色材料/智能材料并可多次使用，已被证明具有减少人类纸张浪费并缓解日益严重的环境问题的潜力。为了让RP更接近人们习惯的阅读方式，更贴近日常生活，对具有清晰可见或肉眼变色特性的智能材料的兴趣和努力尤为重要。在这篇综述中，根据刺激方案，五种类型的刺激（热、水相关、光、应力和电场）智能显色材料和具有可见颜色切换的系统应用于光吸收显示器RP是重点。每个部分都讨论了不同的刺激显色分子及其相应的系统，以探讨光吸收RP中各种显色材料的设计理念、方法、工作机制和优缺点。此外，还概述了挑战和前景，为探索更多用于高性能RP的智能材料及其相关技术提供策略。