Vanadium dioxide-polydiacetylene thermochromic composite films and their solar regulation properties

被引：0
|
作者：
Wang B.
Gao Y.
Yang S. [1 ]
Xu H.
Nie Y.
Jiang X. [1 ,2 ]
机构：
[1] Institute for Smart Materials & Engineering, University of Jinan, Jinan
[2] School of Materials Science & Engineering, University of Jinan, Jinan
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 06期
基金：
中国国家自然科学基金;
关键词：
composite films; polydiacetylene; smart windows; thermochromism; vanadium dioxide (VO[!sub]2[!/sub]);
D O I：
10.13801/j.cnki.fhclxb.20221028.002
中图分类号：
学科分类号：
摘要：
Vanadium dioxide (VO2) with thermally induced phase transition has demonstrated a good regulation ability in the range of near-infrared light, and widely used in smart windows. However, the VO2-based smart windows still face critical challenges in practical use, such as the unfavorable brown-yellow color of the VO2 thin film, and lack of indicative color-changing for the phase transition process, which are key factors limiting its applications in smart glass. Combining VO2 with other chromogenic materials could effectively improve the appearance color of smart window coatings and endow it indicative color-changing function. In this study, it is successful to obtain VO2 multifunctional composite film with reversible thermochromic polydiacetylene (PDA-1, from blue to red) through a bilayer structure strategy. The composite film not only shows favorable grayish-blue color, but also exhibits good solar light regulation ability and luminescence transmittance (solar light regulation ability ΔTsol=7.64%, luminescence transmittance at low temperature Tl, lum=56.23%, luminescence transmittance at high temperature Th, lum= 62.37%). In addition, the thermochromic temperature of the PDA-1 is close to the phase transition temperature of monoclinic VO2 (~68℃). With the temperature increases, the appearance color of the composite film can change from grayish-blue to red color, and also regulating the near-infrared transmittance, which is conducive to the visual display and further promotion for the thermochromic smart windows. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：3417 / 3427
页数：10
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