An Easy‑to‑Prepare Flexible Dual‑Mode Fiber Membrane for Daytime Outdoor Thermal Management  

作　　者：Bo Xiang Rong Zhang Xujia Zeng Yanlong Luo Zhenyang Luo 

机构地区：[1]College of Science,Nanjing Forestry University,Nanjing 210037,People’s Republic of China [2]Department of Materials Science and Engineering,Collaborative Innovation Center of Advanced Microstructures,Jiangsu Key Laboratory of Artificial Functional Materials,College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,People’s Republic of China

出　　处：《Advanced Fiber Materials》2022年第5期1058-1068,共11页先进纤维材料（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.32001429);China Postdoctoral Science Foundation(2020M671442,2019M661768);Jiangsu Planned Projects for Postdoctoral Research Funds(2020Z369,2019K091);Scientific Research Start-up Funds of Nanjing Forestry University(163101127);Undergraduate Innovation Training Program of Nanjing Forestry University(2020NFUSPITP0224);the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).

摘　　要：Excellent outdoor thermal management is vital for public health and safety.However,the ever-changing and uncontrol-lable outdoor environmental conditions,such as irrepressible sunlight and drastic temperature fluctuations,bring majestic challenges to outdoor thermal management.Here,we report a significant advancement toward designing and fabricating a novel fiber membrane with a dual-function of radiative cooling and solar heating for an efficient daytime outdoor thermal management.Unlike the reported dual-mode thermal management materials,which are usually fabricated by compounding organic polymers and metal/inorganic non-metal materials,our fiber-based membrane is composed of only two polymers,i.e.,poly(vinylidene fluoride-co-hexafluoropropene)(PVDF-HFP)and polypyrrole(PPy).The resulting membrane presents outstanding outdoor thermoregulation capacity,with a practically attainable sun-ambient cooling temperature of~4.5℃,super-ambient heating temperature of~35.8℃,in an outdoor environment,under solar intensity(Isolar)of~850 W m^(-2).Fabrication process is simple and cost-effective,which offers the possibility of preparing large-scale products.Owing to the scalable and simple fabrication process,and the exceptional outdoor thermoregulation ability,this dual-mode fiber membrane has great potential to maintain a comfortable outdoor environment for human activities and industrial operations.

关 键 词：Radiative cooling Solar heating Solar reflectance Infrared emittance Daytime outdoor thermal management 

分 类 号：TB3[一般工业技术—材料科学与工程]