期刊
CRYSTALS
卷 11, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/cryst11040440
关键词
smart window; NIR response; liquid crystal; orientation layer; photothermal
资金
- National Natural Science Foundation of China [NNSFC 21975215, 21674088]
- Scientific Research Foundation of Hunan Provincial Education Department [19A486]
- Hunan 2011 Collaborative Innovation Center of Chemical Engineering & Technology with Environmental Benignity and Effective Resource Utilization
This study introduces a novel smart window with CNT-PDB as the orientation layer, which can rapidly respond to NIR light and adjust light transmittance to prevent sunlight from entering the room, improving energy efficiency.
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.
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