Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling
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 similar to 6 degrees C and cooling powers of similar to 96 watts per square meter (Wm(-2)) under solar intensities of 890 and 750 Wm(-2), respectively. The performance equals or surpasses those of state-of-the-art PDRC designs, and the technique offers a paint-like simplicity.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1478138
- Alternate Identifier(s):
- OSTI ID: 1482561; OSTI ID: 1503287
- Report Number(s):
- BNL-209460-2018-JAAM
Journal ID: ISSN 0036-8075; /sci/362/6412/315.atom
- Grant/Contract Number:
- AC02-06CH11357; SC0012704
- Resource Type:
- Journal Article: Published Article
- Journal Name:
- Science
- Additional Journal Information:
- Journal Name: Science Journal Volume: 362 Journal Issue: 6412; Journal ID: ISSN 0036-8075
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Mandal, Jyotirmoy, Fu, Yanke, Overvig, Adam C., Jia, Mingxin, Sun, Kerui, Shi, Norman N., Zhou, Hua, Xiao, Xianghui, Yu, Nanfang, and Yang, Yuan. Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling. United States: N. p., 2018.
Web. doi:10.1126/science.aat9513.
Mandal, Jyotirmoy, Fu, Yanke, Overvig, Adam C., Jia, Mingxin, Sun, Kerui, Shi, Norman N., Zhou, Hua, Xiao, Xianghui, Yu, Nanfang, & Yang, Yuan. Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling. United States. https://doi.org/10.1126/science.aat9513
Mandal, Jyotirmoy, Fu, Yanke, Overvig, Adam C., Jia, Mingxin, Sun, Kerui, Shi, Norman N., Zhou, Hua, Xiao, Xianghui, Yu, Nanfang, and Yang, Yuan. 2018.
"Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling". United States. https://doi.org/10.1126/science.aat9513.
@article{osti_1478138,
title = {Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling},
author = {Mandal, Jyotirmoy and Fu, Yanke and Overvig, Adam C. and Jia, Mingxin and Sun, Kerui and Shi, Norman N. and Zhou, Hua and Xiao, Xianghui and Yu, Nanfang and Yang, Yuan},
abstractNote = {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 similar to 6 degrees C and cooling powers of similar to 96 watts per square meter (Wm(-2)) under solar intensities of 890 and 750 Wm(-2), respectively. The performance equals or surpasses those of state-of-the-art PDRC designs, and the technique offers a paint-like simplicity.},
doi = {10.1126/science.aat9513},
url = {https://www.osti.gov/biblio/1478138},
journal = {Science},
issn = {0036-8075},
number = 6412,
volume = 362,
place = {United States},
year = {Thu Sep 27 00:00:00 EDT 2018},
month = {Thu Sep 27 00:00:00 EDT 2018}
}
Web of Science
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