A "Hand-In-Hand" Thermal-Responsive Cyclodextrin Material Designed for Liquid Smart Windows

文献类型： 外文期刊

第一作者： Hu, Siyu

作者： Hu, Siyu;Chen, Yu;Wang, Yong;Zhang, Pengrui;Sun, Jinhe;Li, Cheng;Xiao, Yin

作者机构：

关键词： cyclodextrins; liquid smart windows; thermochromic materials

期刊名称：ADVANCED FUNCTIONAL MATERIALS （ 影响因子：19.0； 五年影响因子：19.4 ）

ISSN： 1616-301X

年卷期： 2024 年 34 卷 42 期

页码：

收录情况： SCI

摘要： Thermochromic smart windows have emerged as a focal point in energy research. In this study, a novel approach is introduced for developing thermoresponsive materials for smart windows, utilizing microscopic agglomeration of molecules to regulate incident light. The groundbreaking material, beta-CD-Val-IBAm4, is constructed by grafting four isobutylated valines onto natural beta-cyclodextrins. This material exhibits a unique "hand-in-hand" effect, resulting from the interaction of isobutylated valine side chains, which leads to molecular aggregation and reduced light transmission at elevated temperatures. The hydration-dehydration process is related to molecular aggregation rather than crosslinking, ensuring the structural integrity and uniformity of the smart windows. Molecular dynamics simulations and 2D NOESY confirm the thermal response mechanism of beta-CD-Val-IBAm4. When dissolve in a glycerol-water binary solvent system, the material forms a thermochromic liquid with outstanding optical performance (Delta Tsol of 1 mm liquid can reach 69.8%) and long-term stability. This innovative approach opens new avenues for the advancement of next-generation smart window technologies. A new cyclodextrin-based material, beta-CD-Val-IBAm4, is developed for smart windows. This supramolecular thermo-responsive material utilizes microscopic agglomeration of beta-CD-Val-IBAm4 rather than crosslinking to regulate incident light, ensuring the structural integrity and uniformity of the smart window. The beta-CD-Val-IBAm4 forms a thermochromic liquid with outstanding optical performance and long-term stability. image

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