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Title: 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:
ORCiD logo; ; ORCiD logo; ORCiD logo; ; ORCiD logo; ; ; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Lab. (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. 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, and Yang, Yuan. Thu . "Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling". United States. doi: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},
journal = {Science},
issn = {0036-8075},
number = 6412,
volume = 362,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1126/science.aat9513

Citation Metrics:
Cited by: 46 works
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