Wang Yang, Yan Zhendong, Zhang Mengfei, Zhang Zheng, Li Ting, Chen Mingqing, Dong Weifu
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University 1800 Lihu Road Wuxi 214122 China
Nanoscale Adv. 2021 Mar 27;3(11):3177-3183. doi: 10.1039/d1na00113b. eCollection 2021 Jun 1.
Cesium-doped tungsten bronze Cs WO (CWO) is an ideal near infrared (NIR) shielding material for solar filters. However, the NIR shielding ability of CWO-dispersed films easily deteriorates in hot humid environments, which severely hinders the commercial application of CWO. In this paper, UV/NIR shielding nanocomposite films were prepared by dispersing core-shell structured CWO@polydopamine (CWO@PDA) in a poly(vinyl alcohol) matrix. Because of the strong ultraviolet light absorption ability of PDA, it can shield ultraviolet light, which is generally detrimental to our health. The prepared nanocomposite films can efficiently shield 88.3% UV and 85.5% NIR radiation even though they show relatively high transparency in the visible range. Importantly, the good protection of the continuous PDA shells played an important role in enhancing the stability of CWO nanoparticles. The nanocomposite films also exhibit excellent stability in hot humid environments. Therefore, core-shell structured CWO@PDA nanoparticles have great potential as a novel UV/NIR shielding material for the development of efficient energy-saving windows.
铯掺杂钨青铜CsₓWO₃（CWO）是一种用于太阳能滤光片的理想近红外（NIR）屏蔽材料。然而，CWO分散膜的近红外屏蔽能力在高温潮湿环境中容易恶化，这严重阻碍了CWO的商业应用。本文通过将核壳结构的CWO@聚多巴胺（CWO@PDA）分散在聚乙烯醇基质中制备了紫外/近红外屏蔽纳米复合膜。由于PDA具有很强的紫外光吸收能力，它可以屏蔽通常对我们健康有害的紫外光。制备的纳米复合膜即使在可见光范围内显示出相对较高的透明度，也能有效地屏蔽88.3%的紫外线和85.5%的近红外辐射。重要的是，连续的PDA壳的良好保护在提高CWO纳米颗粒的稳定性方面发挥了重要作用。纳米复合膜在高温潮湿环境中也表现出优异的稳定性。因此，核壳结构的CWO@PDA纳米颗粒作为一种新型的紫外/近红外屏蔽材料在高效节能窗的开发方面具有巨大潜力。
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