Aerogel‐Functionalized Thermoplastic Polyurethane as Waterproof, Breathable Freestanding Films and Coatings for Passive Daytime Radiative Cooling
Abstract Passive daytime radiative cooling (PDRC) is an emerging sustainable technology that can spontaneously radiate heat to outer space through an atmospheric transparency window to achieve self‐cooling. PDRC has attracted considerable attention and shows great potential for personal thermal mana...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-07-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202201190 |
| _version_ | 1828264860945743872 |
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| author | Xiameng Shan Ling Liu Yusi Wu Dengsen Yuan Jing Wang Chengjiao Zhang Jin Wang |
| author_facet | Xiameng Shan Ling Liu Yusi Wu Dengsen Yuan Jing Wang Chengjiao Zhang Jin Wang |
| author_sort | Xiameng Shan |
| collection | DOAJ |
| description | Abstract Passive daytime radiative cooling (PDRC) is an emerging sustainable technology that can spontaneously radiate heat to outer space through an atmospheric transparency window to achieve self‐cooling. PDRC has attracted considerable attention and shows great potential for personal thermal management (PTM). However, PDRC polymers are limited to polyethylene, polyvinylidene fluoride, and their derivatives. In this study, a series of polymer films based on thermoplastic polyurethane (TPU) and their composite films with silica aerogels (aerogel‐functionalized TPU (AFTPU)) are prepared using a simple and scalable non‐solvent‐phase‐separation strategy. The TPU and AFTPU films are freestanding, mechanically strong, show high solar reflection up to 94%, and emit strongly in the atmospheric transparency window, thereby achieving subambient cooling of 10.0 and 7.7 °C on a hot summer day for the TPU and AFTPU film (10 wt%), respectively. The AFTPU films can be used as waterproof and moisture permeable coatings for traditional textiles, such as cotton, polyester, and nylon, and the highest temperature drop of 17.6 °C is achieved with respect to pristine nylon fabric, in which both the cooling performance and waterproof properties are highly desirable for the PTM applications. This study opens up a promising route for designing common polymers for highly efficient PDRC. |
| first_indexed | 2024-04-13T04:31:00Z |
| format | Article |
| id | doaj.art-087f0782ec5d468ca7501140a019a705 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-13T04:31:00Z |
| publishDate | 2022-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-087f0782ec5d468ca7501140a019a7052022-12-22T03:02:19ZengWileyAdvanced Science2198-38442022-07-01920n/an/a10.1002/advs.202201190Aerogel‐Functionalized Thermoplastic Polyurethane as Waterproof, Breathable Freestanding Films and Coatings for Passive Daytime Radiative CoolingXiameng Shan0Ling Liu1Yusi Wu2Dengsen Yuan3Jing Wang4Chengjiao Zhang5Jin Wang6School of Nano‐Tech and Nano‐Bionics University of Science and Technology of China Hefei 230026 P. R. ChinaSchool of Nano‐Tech and Nano‐Bionics University of Science and Technology of China Hefei 230026 P. R. ChinaKey Laboratory of Multifunctional Nanomaterials and Smart Systems Suzhou Institute of Nano‐Tech and Nano‐Bionics Chinese Academy of Sciences Suzhou 215123 P. R. ChinaGusu Laboratory of Materials Science Suzhou 215123 P. R. ChinaSchool of Nano‐Tech and Nano‐Bionics University of Science and Technology of China Hefei 230026 P. R. ChinaSchool of Textile and Clothing Nantong University Nantong 226019 P. R. ChinaSchool of Nano‐Tech and Nano‐Bionics University of Science and Technology of China Hefei 230026 P. R. ChinaAbstract Passive daytime radiative cooling (PDRC) is an emerging sustainable technology that can spontaneously radiate heat to outer space through an atmospheric transparency window to achieve self‐cooling. PDRC has attracted considerable attention and shows great potential for personal thermal management (PTM). However, PDRC polymers are limited to polyethylene, polyvinylidene fluoride, and their derivatives. In this study, a series of polymer films based on thermoplastic polyurethane (TPU) and their composite films with silica aerogels (aerogel‐functionalized TPU (AFTPU)) are prepared using a simple and scalable non‐solvent‐phase‐separation strategy. The TPU and AFTPU films are freestanding, mechanically strong, show high solar reflection up to 94%, and emit strongly in the atmospheric transparency window, thereby achieving subambient cooling of 10.0 and 7.7 °C on a hot summer day for the TPU and AFTPU film (10 wt%), respectively. The AFTPU films can be used as waterproof and moisture permeable coatings for traditional textiles, such as cotton, polyester, and nylon, and the highest temperature drop of 17.6 °C is achieved with respect to pristine nylon fabric, in which both the cooling performance and waterproof properties are highly desirable for the PTM applications. This study opens up a promising route for designing common polymers for highly efficient PDRC.https://doi.org/10.1002/advs.202201190aerogelpassive radiative coolingpersonal thermal managementthermoplastic polyurethane |
| spellingShingle | Xiameng Shan Ling Liu Yusi Wu Dengsen Yuan Jing Wang Chengjiao Zhang Jin Wang Aerogel‐Functionalized Thermoplastic Polyurethane as Waterproof, Breathable Freestanding Films and Coatings for Passive Daytime Radiative Cooling Advanced Science aerogel passive radiative cooling personal thermal management thermoplastic polyurethane |
| title | Aerogel‐Functionalized Thermoplastic Polyurethane as Waterproof, Breathable Freestanding Films and Coatings for Passive Daytime Radiative Cooling |
| title_full | Aerogel‐Functionalized Thermoplastic Polyurethane as Waterproof, Breathable Freestanding Films and Coatings for Passive Daytime Radiative Cooling |
| title_fullStr | Aerogel‐Functionalized Thermoplastic Polyurethane as Waterproof, Breathable Freestanding Films and Coatings for Passive Daytime Radiative Cooling |
| title_full_unstemmed | Aerogel‐Functionalized Thermoplastic Polyurethane as Waterproof, Breathable Freestanding Films and Coatings for Passive Daytime Radiative Cooling |
| title_short | Aerogel‐Functionalized Thermoplastic Polyurethane as Waterproof, Breathable Freestanding Films and Coatings for Passive Daytime Radiative Cooling |
| title_sort | aerogel functionalized thermoplastic polyurethane as waterproof breathable freestanding films and coatings for passive daytime radiative cooling |
| topic | aerogel passive radiative cooling personal thermal management thermoplastic polyurethane |
| url | https://doi.org/10.1002/advs.202201190 |
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