Humidity-Driven Switch in the Transparency of a Nanofiber Film for a Smart Window
Humidity-Driven Switch in the Transparency of a Nanofiber Film for a Smart Window
复制标题
智能窗户纳米纤维薄膜透明度的湿度驱动开关
DOI：
10.1021/acs.jpclett.1c02772
复制
发表时间：
2021
影响因子：
5.7
通讯作者：
Dong Wang
中科院分区：
文献类型：
--
作者：
Chenxue Xiang;Wang Wen;Shuang Wang;Shuying Liu;Mufang Li;Dong Wang
传统的智能窗户使用电信号来转换透明度。然而，这种电力传输模式极大地限制了它们的使用。本文制备了一种透明的PVA-co-PE/CA复合膜，该复合膜在湿度刺激下可实现透明性的可逆转变。复合膜的制备方法包括简单的浸渍和热固化过程，显示出高的光学透明性（96.61%）和优异的拉伸断裂应变为536.34%。一旦暴露于湿气刺激，复合膜的快速吸湿溶胀导致柠檬酸填充相与纳米纤维之间的折射率差增大，这直接导致复合膜的透明度急剧下降。此外，该复合膜可以任意附着在透明基底表面，设计成一些特殊的可视化装置或智能窗户，在信息加密和智能家居方面具有广阔的应用前景。
Traditional smart windows use electrical signals to transform transparency. However, this electric transmission mode greatly limits their uses. Here, we have prepared a transparent PVA-co-PE/CA composite film, which can realize the reversible transformation of transparency under the stimulation of humidity. The preparation method of the composite film included simple immersion and a thermal curing process, showing high optical transparency (96.61%) and an excellent tensile strain at break of 536.34%. Once exposed to moisture stimulation, the rapid hygroscopic swelling of the composite film led to the increase in the difference in the refractive index between the citric acid filling phase and the nanofibers, which directly led to the sharp decrease in the composite film's transparency. Moreover, the composite film can be arbitrarily attached to the surface of the transparent substrate and designed as some special visualization devices or smart windows, which have a promising future in information encryption and intelligent homes.