Yang Jia, Tang Chen, Sun Huan, Liu Zhao, Liu Zhuangzhuang, Li Ke, Zhu Lin, Qin Gang, Sun Gengzhi, Li Yangling, Chen Qiang
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 211816, China.
ACS Appl Mater Interfaces. 2021 Jul 7;13(26):31180-31192. doi: 10.1021/acsami.1c07563. Epub 2021 Jun 27.
Poor mechanical properties and freezing at low temperatures of traditional photochromic hydrogels limit their applications. Here, a novel type of photochromic nanocomposite organohydrogels (NC OGHs) by adding tungsten oxide nanoparticles was prepared by a simple one-pot method. The photochromic NC OGHs demonstrated excellent integrated properties, including high transparency, high mechanical properties, low-temperature resistance, anti-dehydration, rewrite capability, and UV blocking ability. In addition, the degree of coloration of NC OGHs could be precisely controlled by UV irradiation, and the bleaching process could be controlled by the temperature and atmosphere. Besides flexible optical information storage devices and optical filters, these photochromic NC OGHs were also used for smart windows in both room temperature and cold environments. The work provides a new insight into photochromic organohydrogels.
传统光致变色水凝胶较差的机械性能以及在低温下会冻结，这限制了它们的应用。在此，通过一种简单的一锅法制备了一种新型的添加氧化钨纳米颗粒的光致变色纳米复合有机水凝胶（NC OGHs）。这种光致变色NC OGHs表现出优异的综合性能，包括高透明度、高机械性能、耐低温、抗脱水、可重写能力以及紫外线阻挡能力。此外，NC OGHs的着色程度可通过紫外线照射精确控制，而漂白过程可通过温度和气氛来控制。除了柔性光学信息存储设备和光学滤波器外，这些光致变色NC OGHs还被用于室温及寒冷环境下的智能窗户。这项工作为光致变色有机水凝胶提供了新的见解。
