| Literature DB >> 30262632 |
Jyotirmoy Mandal1, Yanke Fu1, Adam C Overvig1, Mingxin Jia2, Kerui Sun1, Norman N Shi1, Hua Zhou3,4, Xianghui Xiao3,4, Nanfang Yu5, Yuan Yang5.
Abstract
Passive daytime radiative cooling (PDRC) involves spontaneously cooling a surface by reflecting sunlight and radiating heat to the cold outer space. Current PDRC designs are promising alternatives to electrical cooling but are either inefficient or have limited applicability. We present a simple, inexpensive, and scalable phase inversion-based method for fabricating hierarchically porous poly(vinylidene fluoride-co-hexafluoropropene) [P(VdF-HFP)HP] coatings with excellent PDRC capability. High, substrate-independent hemispherical solar reflectances (0.96 ± 0.03) and long-wave infrared emittances (0.97 ± 0.02) allow for subambient temperature drops of ~6°C and cooling powers of ~96 watts per square meter (W m-2) under solar intensities of 890 and 750 W m-2, respectively. The performance equals or surpasses those of state-of-the-art PDRC designs, and the technique offers a paint-like simplicity.Entities:
Year: 2018 PMID： 30262632 DOI： 10.1126/science.aat9513
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728