Yang Jonguk, Lim Taekyung, Jeong Sang-Mi, Ju Sanghyun
Department of Nanoengineering, Kyonggi University, Gyeonggi-Do, Suwon 16227, South Korea.
ACS Appl Mater Interfaces. 2021 May 5;13(17):20689-20697. doi: 10.1021/acsami.1c03085. Epub 2021 Apr 23.
A smart window, which can easily adjust light transmittance, can provide barrier functions, such as improvement in energy efficiency, glare prevention, and privacy protection. However, a smart window that can selectively provide real-time information and display various colorful characters and images at a desired location has not been developed. In this study, a novel smart window capable of real-time information conversion is developed by advancing the light transmittance control of the existing smart windows. A transparent and flexible window display is fabricated by synthesizing poly(-isopropylacrylamide) (pNIPAM)-,-methylenebisacrylamide-crosslinked hydrogels (NBcH) and near-infrared (NIR) absorption-heating films sandwiched between two plastic substrates. When the NIR laser irradiates the window display panel surface, the temperature rises rapidly, as the NIR absorption-heating film absorbs the NIR wavelength. The generated heat is transferred to pNIPAM in contact with the NIR absorption-heating film, and an image forms in real time. In addition, if the NIR laser and projector simultaneously irradiate the window display panel surface, various colorful images can be displayed. The smart window for real-time information provision proposed in this study acts like a glass curtain that can selectively make a desired location transparent or opaque by controlling the transmittance of light and acts as a display that can present various colorful characters and images in real time. Therefore, it is expected to be highly convenient for users.
一种能够轻松调节透光率的智能窗户，可以提供诸如提高能源效率、防眩光和隐私保护等屏障功能。然而，一种能够选择性地提供实时信息并在期望位置显示各种彩色字符和图像的智能窗户尚未被开发出来。在本研究中，通过改进现有智能窗户的透光率控制，开发了一种能够进行实时信息转换的新型智能窗户。通过合成聚（N-异丙基丙烯酰胺）（pNIPAM）、N,N'-亚甲基双丙烯酰胺交联水凝胶（NBcH）以及夹在两个塑料基板之间的近红外（NIR）吸收加热膜，制备了一种透明且灵活的窗户显示屏。当近红外激光照射窗户显示屏表面时，由于近红外吸收加热膜吸收近红外波长，温度会迅速升高。产生的热量传递到与近红外吸收加热膜接触的pNIPAM上，实时形成图像。此外，如果近红外激光和投影仪同时照射窗户显示屏表面，就可以显示各种彩色图像。本研究中提出的用于实时信息提供的智能窗户，其作用类似于玻璃幕，通过控制光的透过率，可以选择性地使期望位置透明或不透明，并且还能作为显示屏实时呈现各种彩色字符和图像。因此，预计对用户来说会非常方便。
