基于PNIPAm-glass-MXene/PAM的新型光热致变色智能窗具有高屏蔽、快速响应和优异的稳定性,Solar RRL

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基于PNIPAm-glass-MXene/PAM的新型光热致变色智能窗具有高屏蔽、快速响应和优异的稳定性
Solar RRL ( IF 6.0 ) Pub Date : 2023-01-24 , DOI: 10.1002/solr.202200990
Qiuxing Lei ₁ , Wei Yu _{1,

2} , Guoxiang Xie ₁ , Yifan Li _{1,

2} , Changheng Wu ₃ , Gangkai Jiang ₁ , Yang Zhou ₁ , Huaqing Xie _{1,

2}

Affiliation

近年来，智能窗户已成为实现建筑节能的重要方法。热致变色智能窗的响应非常依赖于纳米粒子的光热吸收。然而，分散在热致变色材料中的纳米粒子会在窗户表面造成高热负荷，并随着时间的推移变得不均匀和不稳定。这些问题严重限制了光热变色智能窗的应用。在此，使用双组分聚 ( N-异丙基丙烯酰胺）PNIPAm 和 MXene/聚丙烯酰胺（PAM），表示为 PgM 智能窗。与其他光致变色智能窗相比，开发的PgM智能窗降低了窗体表面温度，并且由于MXene的长期稳定分散，能见度没有明显下降。一步法合成的 PNIPAm 微凝胶粒径小，散射效率高，制备的 1-mm PNIPAm 可见光透射率为 91.2%，太阳光屏蔽率为 99.2%。在追求高效光管理的同时，PgM 智能窗的响应速度比 1 毫米 PNIPAm 智能窗快 25 分钟。此外，该装置有效提高了水凝胶的热响应稳定性。

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Novel Photothermochromic Smart Window Based on PNIPAm-glass-MXene/PAM with High Shield, Fast Response, and Excellent Stability

In recent years, smart windows have emerged as an important method to achieve energy efficiency in buildings. The responses of thermochromic smart windows are very dependent on the photothermal absorption of nanoparticles. However, nanoparticles dispersed in thermochromic materials cause high thermal loads on the window's surface and become nonuniform and unstable with time. These problems seriously limit application of photothermochromic smart windows. Herein, a new photothermochromic smart window is designed using bicomponent poly (N-isopropylacrylamide) PNIPAm and MXene/polyacrylamide (PAM), denoted as P-g-M smart window. Compared with other photothermochromic smart windows, the developed P-g-M smart window reduces the window's surface temperature, and there is no obvious visibility decrement due to the long-term stable dispersion of MXene. The small particle size of PNIPAm microgels synthesized by the one-step method shows high scattering efficiency, and the fabricated 1-mm PNIPAm displays 91.2% visible light transmittance and 99.2% solar light shielding. While pursuing efficient light management, the P-g-M smart window responds 25 min faster than a 1 mm PNIPAm smart window. In addition, the device effectively improves the hydrogel thermal response stability. The indoor and outdoor energy-saving demonstration shows that P-g-M smart windows can reduce indoor air temperature by 5–10 °C compared with normal windows.

更新日期：2023-01-24

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