High-Efficiency Responsive Smart Windows Fabricated by Carbon Nanotubes Modified by Liquid Crystalline Polymers
High-Efficiency Responsive Smart Windows Fabricated by Carbon Nanotubes Modified by Liquid Crystalline Polymers
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DOI：
10.3390/cryst11040440
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发表时间：
2021-04-01
期刊：
影响因子：
2.7
通讯作者：
Xie, He-Lou
中科院分区：
文献类型：
--
作者：
Deng, Yuan;Li, Shi-Qin;Xie, He-Lou
智能窗可以通过非能源或低能源的方式动态、自适应地调整透光率，保持舒适的环境温度，有利于能源的高效利用。以联苯类液晶聚合物刷接枝碳纳米管(CNT-PDB)为定向层，提出了一种具有高效近红外(NIR)响应的液晶智能窗口。得到的CNT-PDB聚合物刷可以提供LC分子的垂直取向，以保持初始的透明度。同时，智能窗户对近红外光反应迅速，可以快速调整透光率，防止阳光进入房间。与常用的掺杂体系不同，该方法避免了液晶基质与光热转换材料相容性差的问题，有利于提高器件的耐用性。
Smart windows can dynamically and adaptively adjust the light transmittance in non-energy or low-energy ways to maintain a comfortable ambient temperature, which are conducive to efficient use of energy. This work proposes a liquid crystal (LC) smart window with highly efficient near-infrared (NIR) response using carbon nanotubes grafted by biphenyl LC polymer brush (CNT-PDB) as the orientation layer. The resultant CNT-PDB polymer brush can provide the vertical orientation of LC molecules to maintain the initial transparency. At the same time, the smart window shows a rapid response to NIR light, which can quickly adjust the light transmittance to prevent sunlight from entering the room. Different from common doping systems, this method avoids the problem of poor compatibility between the LC host and photothermal conversion materials, which is beneficial for improving the durability of the device.