环境条件下可调节近红外穿透的柔性常透智能窗,Advanced Materials Interfaces

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环境条件下可调节近红外穿透的柔性常透智能窗
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2022-05-27 , DOI: 10.1002/admi.202200338
Yang Liu ₁ , Wenbing Zhu ₁ , Jingxin Sang ₁ , Xing Zhang ₁ , Dong Wook Lee ₂ , Dae‐Shik Seo ₂

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可逆地遮挡可见光和调制近红外 (NIR) 光穿透的智能窗户可节省大量能源。在这里，设计和制造了一个简单、超快速、可电切换的智能窗口，它最初反射 NIR 光，然后将其散射以响应热刺激。通过光聚合 RM 257 单体制备透明聚合物稳定胆甾型液晶 (PSCLC)，其中平面 CLC 完全反射近红外光 (1050-1550 nm)。接下来，一个超薄的、热致的、W _0.003 V _0.997 O ₂在很宽的温度范围内调制 NIR 光穿透的掺杂聚乙烯吡咯烷酮混合薄层覆盖在 PSCLC 上，最终的 WVO-PSCLC 智能窗口具有四种 NIR 调制模式。具体来说，当带有三个 1.5- × 2-cm WVO-PSCLCs 智能窗的模型木屋被 250-W 红外光热照射 10 分钟时，内部温度比没有智能窗的房屋低 4.8°C . 由聚对苯二甲酸乙二醇酯 (PET) 制成的柔性智能窗户可以弯曲 15 毫米的半径而没有任何明显的损坏，并且非常耐外部垂直压力。灵活的 WVO-PSCLC 智能窗用途广泛，可提供出色的透明度管理和近红外光穿透调制。

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Flexible Normally Transparent Smart Window Modulating Near-Infrared Penetration under Ambient Conditions

Smart windows that both reversibly occlude visible light and modulate the penetration of near-infrared (NIR) light save a great deal of energy. Here, a simple, super-fast, electrically switchable smart window that initially reflects NIR light and then scatters it in response to thermal stimuli is designed and fabricated. Transparent polymer-stabilized cholesteric liquid crystals (PSCLCs) are prepared by photo-polymerizing RM 257 monomers in which the planar CLCs fully reflected NIR light (1050–1550 nm). Next, an ultra-thin, thermotropic, W_0.003V_0.997O₂-doped polyvinylpyrrolidone hybrid thin layer that modulates NIR light penetration over a very broad temperature range is overlaid on the PSCLCs, and the final WVO-PSCLCs smart window features four NIR modulation modes. Specifically, when a model wood house with three 1.5- × 2-cm WVO-PSCLCs smart windows is thermally irradiated by a 250-W infrared light for 10 min, the internal temperature is 4.8 °C less than that of a house lacking smart windows. Flexible smart windows fabricated from polyethylene terephthalate (PET) could be bent through a radius of 15 mm without any noticeable damage, and are very resistant to external vertical pressure. The flexible WVO-PSCLCs smart windows are versatile, and afford outstanding transparency management and modulation of NIR light penetration.

更新日期：2022-05-27

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