Ultra-strong anti-freezing hydrogel-based smart window with wide geographical adaptability  

作　　者：BAI YiJie TANG TianQi HE YuRong 

机构地区：[1]School of Energy Science&Engineering,Harbin Institute of Technology,Harbin 150001,China [2]Heilongjiang Key Laboratory of New Energy Storage Materials and Processes,Harbin 15001,China [3]Zhengzhou Research Institute,Harbin Institute of Technology,Zhengzhou 450000,China

出　　处：《Science China(Technological Sciences)》2024年第12期3801-3811,共11页中国科学(技术科学英文版)

基　　金：supported by the Key Research and Development Program-Guidance Project of Heilongjiang Province of China(Grant No.GZ20210150)。

摘　　要：Smart windows,capable of dynamically regulating indoor heat,offer a promising avenue for effectively reducing energy consumption.Hydrogel-based smart windows are excellent at thermal modulation and daylighting,but they are difficult to commercialize globally due to problems like winter ice formation,which can affect thermal insulation,daylighting,and structural integrity,as well as an impractical cloud point temperature(t_(cp)).To solve these issues,a ternary anti-freezing system consisting of ethylene glycol(EG),glycerol,and water is proposed.With the t_(cp)regulated at 31.6℃,the system strikes a balance between outstanding daylighting(91.89%)and solar modulation ability(78.32%).Furthermore,the system shows resilience even below-30.0℃and long-term stability,which qualifies it for use in densely populated regions even with severely cold weather.To further illustrate the distinct impacts of EG and glycerol,the optical characteristics and tcpof binary systems containing EG and water as well as glycerol and water were examined.The durability test includes severely cold temperature of-30.0℃ and solar exposure temperature of 60.0℃.This work would offer insights to advance the field's understanding of antifreezing capability modification in smart windows and advance the development of environmentally and energy-efficiently designed buildings.

关 键 词：smart window ANTI-FREEZING durability test optical properties cloud point temperature regulation 

分 类 号：TU111.4[建筑科学—建筑理论]