Liuqian An, Jiaxiang Ma, Peizhi Wang, Aleksandr Kuchmizhak, Jinxin Yao, Hongbo Xu and Wei Wang
{"title":"基于光选择性不对称组装的原位可切换纳米纤维薄膜,实现全年节能","authors":"Liuqian An, Jiaxiang Ma, Peizhi Wang, Aleksandr Kuchmizhak, Jinxin Yao, Hongbo Xu and Wei Wang","doi":"10.1039/D4TA03558E","DOIUrl":null,"url":null,"abstract":"<p >Thermal management of buildings consumes 51% of the world's energy use. Optimization of the energy use can be potentially achieved <em>via</em> daylight harvesting and radiative cooling approaches, yet their simultaneous utilization under static conditions is challenging due to opposite operation principles. Here, an <em>in situ</em> switchable photoselective polymer (PSP) material was prepared by sequential electrospinning of light-reflecting and light-absorbing layers made of contrasting polymer nanofibers. The as-prepared PSP material exhibited a high solar light reflectance of 97.7% and a high broadband emissivity of 94.9% resulting in a radiative cooling power of 111.1 W m<small><sup>−2</sup></small>. Such “cooling” state of the PSP film can be easily switched to a “heating” one <em>via</em> impregnation of an index matching liquid that suppresses scattering at the film–air interface and reduces the solar band reflectivity of the film. Thanks to the highly porous structure of the designed PSP film, its switching takes less than 5 min and allows an integrated solar absorbance of ∼95.6% to be achieved, resulting in an estimated heating power of 781.6 W m<small><sup>−2</sup></small>. Performed numerical calculations further supported the high potential of the developed PSP film for thermal management of buildings located at high latitudes with energy savings up to 89.74 GJ m<small><sup>−2</sup></small> per year and reduced CO<small><sub>2</sub></small> emissions down to 21.69 t.</p>","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":" 29","pages":" 18304-18312"},"PeriodicalIF":9.5000,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"In situ switchable nanofiber films based on photoselective asymmetric assembly towards year-round energy saving†\",\"authors\":\"Liuqian An, Jiaxiang Ma, Peizhi Wang, Aleksandr Kuchmizhak, Jinxin Yao, Hongbo Xu and Wei Wang\",\"doi\":\"10.1039/D4TA03558E\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Thermal management of buildings consumes 51% of the world's energy use. Optimization of the energy use can be potentially achieved <em>via</em> daylight harvesting and radiative cooling approaches, yet their simultaneous utilization under static conditions is challenging due to opposite operation principles. Here, an <em>in situ</em> switchable photoselective polymer (PSP) material was prepared by sequential electrospinning of light-reflecting and light-absorbing layers made of contrasting polymer nanofibers. The as-prepared PSP material exhibited a high solar light reflectance of 97.7% and a high broadband emissivity of 94.9% resulting in a radiative cooling power of 111.1 W m<small><sup>−2</sup></small>. Such “cooling” state of the PSP film can be easily switched to a “heating” one <em>via</em> impregnation of an index matching liquid that suppresses scattering at the film–air interface and reduces the solar band reflectivity of the film. Thanks to the highly porous structure of the designed PSP film, its switching takes less than 5 min and allows an integrated solar absorbance of ∼95.6% to be achieved, resulting in an estimated heating power of 781.6 W m<small><sup>−2</sup></small>. Performed numerical calculations further supported the high potential of the developed PSP film for thermal management of buildings located at high latitudes with energy savings up to 89.74 GJ m<small><sup>−2</sup></small> per year and reduced CO<small><sub>2</sub></small> emissions down to 21.69 t.</p>\",\"PeriodicalId\":82,\"journal\":{\"name\":\"Journal of Materials Chemistry A\",\"volume\":\" 29\",\"pages\":\" 18304-18312\"},\"PeriodicalIF\":9.5000,\"publicationDate\":\"2024-06-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Materials Chemistry A\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2024/ta/d4ta03558e\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ta/d4ta03558e","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
In situ switchable nanofiber films based on photoselective asymmetric assembly towards year-round energy saving†
Thermal management of buildings consumes 51% of the world's energy use. Optimization of the energy use can be potentially achieved via daylight harvesting and radiative cooling approaches, yet their simultaneous utilization under static conditions is challenging due to opposite operation principles. Here, an in situ switchable photoselective polymer (PSP) material was prepared by sequential electrospinning of light-reflecting and light-absorbing layers made of contrasting polymer nanofibers. The as-prepared PSP material exhibited a high solar light reflectance of 97.7% and a high broadband emissivity of 94.9% resulting in a radiative cooling power of 111.1 W m−2. Such “cooling” state of the PSP film can be easily switched to a “heating” one via impregnation of an index matching liquid that suppresses scattering at the film–air interface and reduces the solar band reflectivity of the film. Thanks to the highly porous structure of the designed PSP film, its switching takes less than 5 min and allows an integrated solar absorbance of ∼95.6% to be achieved, resulting in an estimated heating power of 781.6 W m−2. Performed numerical calculations further supported the high potential of the developed PSP film for thermal management of buildings located at high latitudes with energy savings up to 89.74 GJ m−2 per year and reduced CO2 emissions down to 21.69 t.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.