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Title: Sustainable and Inexpensive Polydimethylsiloxane Sponges for Daytime Radiative Cooling

Abstract

Radiative cooling is an emerging cooling technology that can passively release heat to the environment. To obtain a subambient cooling effect during the daytime, chemically engineered structural materials are widely explored to simultaneously reject sunlight and preserve strong thermal emission. However, many previously reported fabrication processes involve hazardous chemicals, which can hinder a material’s ability to be mass produced. In order to eliminate the hazardous chemicals used in the fabrication of previous works, this article reports a white polydimethylsiloxane (PDMS) sponge fabricated by a sustainable process using microsugar templates. By substituting the chemicals for sugar, the manufacturing procedure produces zero toxic waste and can also be endlessly recycled via methods widely used in the sugar industry. The obtained porous PDMS exhibits strong visible scattering and thermal emission, resulting in an efficient temperature reduction of 4.6 °C and cooling power of 43 W m–2 under direct solar irradiation. In addition, due to the air-filled voids within the PDMS sponge, its thermal conductivity remains low at 0.06 W (m K)–1. This unique combination of radiative cooling and thermal insulation properties can efficiently suppress the heat exchange with the solar-heated rooftop or the environment, representing a promising future for new energy-efficient building envelopemore » material.« less

Authors:
ORCiD logo [1];  [1];  [2];  [1];  [1];  [2]; ORCiD logo [1]
  1. State Univ. of New York at Buffalo, NY (United States)
  2. King Abdullah University of Science and Technology (KAUST), Thuwal (Saudi Arabia)
Publication Date:
Research Org.:
State Univ. of New York at Buffalo, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1831812
Grant/Contract Number:  
FE0031960; CBET-1932968
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Science
Additional Journal Information:
Journal Volume: 8; Journal Issue: 23; Journal ID: ISSN 2198-3844
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; building envelope; radiative cooling; sustainability; thermal management

Citation Formats

Zhou, Lyu, Rada, Jacob, Zhang, Huafan, Song, Haomin, Mirniaharikandi, Seyededriss, Ooi, Boon S., and Gan, Qiaoqiang. Sustainable and Inexpensive Polydimethylsiloxane Sponges for Daytime Radiative Cooling. United States: N. p., 2021. Web. doi:10.1002/advs.202102502.
Zhou, Lyu, Rada, Jacob, Zhang, Huafan, Song, Haomin, Mirniaharikandi, Seyededriss, Ooi, Boon S., & Gan, Qiaoqiang. Sustainable and Inexpensive Polydimethylsiloxane Sponges for Daytime Radiative Cooling. United States. https://doi.org/10.1002/advs.202102502
Zhou, Lyu, Rada, Jacob, Zhang, Huafan, Song, Haomin, Mirniaharikandi, Seyededriss, Ooi, Boon S., and Gan, Qiaoqiang. Wed . "Sustainable and Inexpensive Polydimethylsiloxane Sponges for Daytime Radiative Cooling". United States. https://doi.org/10.1002/advs.202102502. https://www.osti.gov/servlets/purl/1831812.
@article{osti_1831812,
title = {Sustainable and Inexpensive Polydimethylsiloxane Sponges for Daytime Radiative Cooling},
author = {Zhou, Lyu and Rada, Jacob and Zhang, Huafan and Song, Haomin and Mirniaharikandi, Seyededriss and Ooi, Boon S. and Gan, Qiaoqiang},
abstractNote = {Radiative cooling is an emerging cooling technology that can passively release heat to the environment. To obtain a subambient cooling effect during the daytime, chemically engineered structural materials are widely explored to simultaneously reject sunlight and preserve strong thermal emission. However, many previously reported fabrication processes involve hazardous chemicals, which can hinder a material’s ability to be mass produced. In order to eliminate the hazardous chemicals used in the fabrication of previous works, this article reports a white polydimethylsiloxane (PDMS) sponge fabricated by a sustainable process using microsugar templates. By substituting the chemicals for sugar, the manufacturing procedure produces zero toxic waste and can also be endlessly recycled via methods widely used in the sugar industry. The obtained porous PDMS exhibits strong visible scattering and thermal emission, resulting in an efficient temperature reduction of 4.6 °C and cooling power of 43 W m–2 under direct solar irradiation. In addition, due to the air-filled voids within the PDMS sponge, its thermal conductivity remains low at 0.06 W (m K)–1. This unique combination of radiative cooling and thermal insulation properties can efficiently suppress the heat exchange with the solar-heated rooftop or the environment, representing a promising future for new energy-efficient building envelope material.},
doi = {10.1002/advs.202102502},
journal = {Advanced Science},
number = 23,
volume = 8,
place = {United States},
year = {2021},
month = {10}
}

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