Journal
ADVANCED FIBER MATERIALS
Volume 4, Issue 5, Pages 1058-1068Publisher
SPRINGERNATURE
DOI: 10.1007/s42765-022-00164-5
Keywords
Radiative cooling; Solar heating; Solar reflectance; Infrared emittance; Daytime outdoor thermal management
Funding
- National Natural Science Foundation of China [32001429]
- China Postdoctoral Science Foundation [2020M671442, 2019M661768]
- Jiangsu Planned Projects for Postdoctoral Research Funds [2020Z369, 2019K091]
- Nanjing Forestry University [163101127]
- Undergraduate Innovation Training Program of Nanjing Forestry University [2020NFUSPITP0224]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Excellent outdoor thermal management is crucial for public health and safety. In this study, a novel fiber membrane with dual-function of radiative cooling and solar heating was designed and fabricated, demonstrating outstanding outdoor thermoregulation capacity.
Excellent outdoor thermal management is vital for public health and safety. However, the ever-changing and uncontrollable 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 similar to 4.5 degrees C, super-ambient heating temperature of similar to 35.8 degrees C, in an outdoor environment, under solar intensity (I-solar) of similar to 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.
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