Tough, Transparent, and Anti-Freezing Nanocomposite Organohydrogels with Photochromic Properties
Poor mechanical properties and freezing at low temperditional 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 flflexible optical information storage devices and optical fifilters, 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.
This work was supported by the Excellent Youth Fund Project of Henan Natural Science Foundation (202300410166), Major Project of WIUCAS (WIUCASQD2021004), National Natural Science Foundation of China (21504022), China Postdoctoral Science Foundation (2018M642745 and 2020M672179), Science and Technology Project of Henan Province (212102210201 and 212102310015), and Project from Department of Education in Henan Province (21A430017 and 2020GGJS052).