Fluorine-containing polyimide nanofiber membranes for durable and anti-aging daytime radiative cooling  

作　　者：Qiaoran Zhang Tiantian Xue Yang Lu Lei Ma Dingyi Yu Tianxi Liu Wei Fan 

机构地区：[1]Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China [2]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China

出　　处：《Journal of Materials Science & Technology》2024年第12期166-173,共8页材料科学技术（英文版）

基　　金：National Natural Science Foundation of China(No.52073053);Young Elite Scientists Sponsorship Program by CAST(No.2021QNRC001);Shanghai Rising-Star Program(No.21QA1400300);Innovation Program of Shanghai Municipal Education Commission(No.2021–01–07–00–03-E00108);Fundamental Research Funds for the Central Universities(No.JUSRP123014).

摘　　要：Personal daytime radiative cooling(PDRC)materials have high sunlight reflection and high selective emis-sivity to outer space in the main atmospheric window,demonstrating huge potential in energy-saving for sustainable development.Recently,polymer-based membranes for radiative cooling have been widely re-ported,due to their easy processing,low cost,and unique optical performance.However,the desired high sunlight reflectance of PDRC materials is easily dampened by environmental aging,high temperature,and ultraviolet(UV)irradiation,resulting in reduced cooling performance for most polymers,adverse to large-scale practical applications.In this work,we demonstrate a novel polyimide nanofiber(PINF)membrane with a fluorine-containing structure via typical electrospinning technology.The resultant PINF membrane exhibits high sunlight reflectance,UV resistance,and excellent thermal stability,rendering anti-aging day-time radiative cooling.The sunlight reflectance of PINF membranes could maintain constant in the aging test for continuous 720 h under outdoor solar irradiation,exhibiting durable and long-term personal day-time radiative cooling performance.

关 键 词：POLYIMIDE NANOFIBER UV resistance Daytime radiative cooling 

分 类 号：TB332[一般工业技术—材料科学与工程]