Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling
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, in...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2018-10, Vol.362 (6412), p.315-319 |
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| creator | Mandal, Jyotirmoy Fu, Yanke Overvig, Adam C Jia, Mingxin Sun, Kerui Shi, Norman N Zhou, Hua Xiao, Xianghui Yu, Nanfang Yang, Yuan |
| description | 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)
] 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
) under solar intensities of 890 and 750 W m
, respectively. The performance equals or surpasses those of state-of-the-art PDRC designs, and the technique offers a paint-like simplicity. |
| doi_str_mv | 10.1126/science.aat9513 |
| format | Article |
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] 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
) under solar intensities of 890 and 750 W m
, respectively. The performance equals or surpasses those of state-of-the-art PDRC designs, and the technique offers a paint-like simplicity.</description><identifier>ISSN: 0036-8075</identifier><identifier>EISSN: 1095-9203</identifier><identifier>DOI: 10.1126/science.aat9513</identifier><identifier>PMID: 30262632</identifier><language>eng</language><publisher>United States: The American Association for the Advancement of Science</publisher><subject>Air conditioners ; Air conditioning ; Climate Control ; Cooling ; Daytime ; Durability ; Fluorides ; MATERIALS SCIENCE ; Polymer coatings ; Protective coatings ; Roofs ; Substrates ; Temperature ; Vinylidene ; Vinylidene fluoride</subject><ispartof>Science (American Association for the Advancement of Science), 2018-10, Vol.362 (6412), p.315-319</ispartof><rights>Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.</rights><rights>Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c498t-2d09f25c11fd30a2e124d7d1d12fe0dcd3d8afaee2851217ed22b0020606d55a3</citedby><cites>FETCH-LOGICAL-c498t-2d09f25c11fd30a2e124d7d1d12fe0dcd3d8afaee2851217ed22b0020606d55a3</cites><orcidid>0000-0001-8124-5234 ; 0000-0002-4389-2921 ; 0000-0002-9462-4724 ; 0000-0003-0264-2640 ; 0000-0002-7912-4027 ; 0000-0002-1559-066X ; 000000021559066X ; 0000000302642640 ; 0000000279124027 ; 0000000294624724 ; 0000000181245234 ; 0000000243892921</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,2884,2885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/30262632$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/1478138$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Mandal, Jyotirmoy</creatorcontrib><creatorcontrib>Fu, Yanke</creatorcontrib><creatorcontrib>Overvig, Adam C</creatorcontrib><creatorcontrib>Jia, Mingxin</creatorcontrib><creatorcontrib>Sun, Kerui</creatorcontrib><creatorcontrib>Shi, Norman N</creatorcontrib><creatorcontrib>Zhou, Hua</creatorcontrib><creatorcontrib>Xiao, Xianghui</creatorcontrib><creatorcontrib>Yu, Nanfang</creatorcontrib><creatorcontrib>Yang, Yuan</creatorcontrib><creatorcontrib>Brookhaven National Lab. (BNL), Upton, NY (United States)</creatorcontrib><creatorcontrib>Argonne National Lab. (ANL), Argonne, IL (United States)</creatorcontrib><title>Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling</title><title>Science (American Association for the Advancement of Science)</title><addtitle>Science</addtitle><description>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)
] 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
) under solar intensities of 890 and 750 W m
, respectively. 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(BNL), Upton, NY (United States)</aucorp><aucorp>Argonne National Lab. (ANL), Argonne, IL (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling</atitle><jtitle>Science (American Association for the Advancement of Science)</jtitle><addtitle>Science</addtitle><date>2018-10-19</date><risdate>2018</risdate><volume>362</volume><issue>6412</issue><spage>315</spage><epage>319</epage><pages>315-319</pages><issn>0036-8075</issn><eissn>1095-9203</eissn><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)
] 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
) under solar intensities of 890 and 750 W m
, respectively. The performance equals or surpasses those of state-of-the-art PDRC designs, and the technique offers a paint-like simplicity.</abstract><cop>United States</cop><pub>The American Association for the Advancement of Science</pub><pmid>30262632</pmid><doi>10.1126/science.aat9513</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0001-8124-5234</orcidid><orcidid>https://orcid.org/0000-0002-4389-2921</orcidid><orcidid>https://orcid.org/0000-0002-9462-4724</orcidid><orcidid>https://orcid.org/0000-0003-0264-2640</orcidid><orcidid>https://orcid.org/0000-0002-7912-4027</orcidid><orcidid>https://orcid.org/0000-0002-1559-066X</orcidid><orcidid>https://orcid.org/000000021559066X</orcidid><orcidid>https://orcid.org/0000000302642640</orcidid><orcidid>https://orcid.org/0000000279124027</orcidid><orcidid>https://orcid.org/0000000294624724</orcidid><orcidid>https://orcid.org/0000000181245234</orcidid><orcidid>https://orcid.org/0000000243892921</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | Science (American Association for the Advancement of Science), 2018-10, Vol.362 (6412), p.315-319 |
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| source | American Association for the Advancement of Science; Jstor Complete Legacy |
| subjects | Air conditioners Air conditioning Climate Control Cooling Daytime Durability Fluorides MATERIALS SCIENCE Polymer coatings Protective coatings Roofs Substrates Temperature Vinylidene Vinylidene fluoride |
| title | Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling |
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