Li Guozheng, Jiang Xiaofeng, Asfahan Hafiz, Jia Siyuan, Shao Sujin, Li Xiuqiang
Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, and Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
Adv Sci (Weinh). 2025 Sep;12(33):e06980. doi: 10.1002/advs.202506980. Epub 2025 Jun 4.
Dynamic and continuous regulation of both solar and thermal radiation through windows is critical for enhancing building energy efficiency. However, achieving such adaptive regulations within a single window remains a formidable challenge. In this study, a humidity-responsive polytetrafluoroethylene (PTFE)/ polyvinyl alcohol (PVA) composite membrane is developed with a nanoporous structure and integrated between two layers of glass to engineer a humidity-controlled smart window. By modulating the humidity level between the glass layers, the smart window enables the dynamic and coordinated modulation of solar and thermal radiation via the reversible adsorption and desorption of water vapor by the PTFE/PVA composite. The results indicate that the humidity-controlled smart window demonstrates superior capabilities in solar modulation (54.4%) and thermal radiation modulation (51.4%). Statistical analysis reveals that compared to ordinary windows and low emissivity (Low-E) windows, PTFE/PVA windows reduce total annual energy consumption by ≈25% and 40%, respectively. This broadband dynamic continuous regulation mechanism may offer groundbreaking insights into the advancement of smart window technologies.
通过窗户对太阳辐射和热辐射进行动态和持续调节对于提高建筑能源效率至关重要。然而，在单个窗户内实现这种自适应调节仍然是一项艰巨的挑战。在本研究中，开发了一种具有纳米多孔结构的湿度响应性聚四氟乙烯（PTFE）/聚乙烯醇（PVA）复合膜，并将其集成在两层玻璃之间，以设计一种湿度可控的智能窗户。通过调节玻璃层之间的湿度水平，智能窗户能够通过PTFE/PVA复合材料对水蒸气的可逆吸附和解吸，实现对太阳辐射和热辐射的动态和协同调节。结果表明，湿度可控智能窗户在太阳辐射调节（54.4%）和热辐射调节（51.4%）方面表现出卓越的能力。统计分析表明，与普通窗户和低辐射（Low-E）窗户相比，PTFE/PVA窗户每年的总能耗分别降低了约25%和40%。这种宽带动态连续调节机制可能为智能窗户技术的发展提供开创性的见解。
