{"title":"Porous block copolymer films with self-adjustable optical transmittance and passive radiative cooling","authors":"Xue Meng, Weiming Tang, Shuyun Zhuo, Jince Zhao, Zixuan Ren, Zhonghe Sun, Hao Yan, Tianyi Zhao, Ziguang Zhao, Mingjie Liu","doi":"10.1007/s12274-024-6778-z","DOIUrl":null,"url":null,"abstract":"<p>As an energy-free cooling technique, radiative cooling has garnered significant attention in the field of energy conservation. However, traditional radiative cooling films often possess static optical properties and their inherent opacity limits their applications in building such as windows. Therefore, there exists a requirement for passive radiative cooling films endowed with adjustable transmittance. Here we report the porous block copolymer films with self-adjustable optical transmittance and passive radiative cooling. In a result, the film exhibited a high solar reflectance (0.3–2.5 µm) of 96.9% and a high infrared emittance (8–13 µm) of 97.9%. Outdoor experiments demonstrated that the film surface temperature was 6.6 °C lower than ambient temperature, with a cooling power of 104.8 W·m<sup>−2</sup>. In addition, the film’s transmittance can be regulated by altering the polarity of the postprocessing solvent, providing an effective approach for regulating indoor light intensity and thermal balance, thereby enhancing the applicability of radiative cooling.\n</p>","PeriodicalId":713,"journal":{"name":"Nano Research","volume":null,"pages":null},"PeriodicalIF":9.5000,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12274-024-6778-z","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}
引用次数: 0
Abstract
As an energy-free cooling technique, radiative cooling has garnered significant attention in the field of energy conservation. However, traditional radiative cooling films often possess static optical properties and their inherent opacity limits their applications in building such as windows. Therefore, there exists a requirement for passive radiative cooling films endowed with adjustable transmittance. Here we report the porous block copolymer films with self-adjustable optical transmittance and passive radiative cooling. In a result, the film exhibited a high solar reflectance (0.3–2.5 µm) of 96.9% and a high infrared emittance (8–13 µm) of 97.9%. Outdoor experiments demonstrated that the film surface temperature was 6.6 °C lower than ambient temperature, with a cooling power of 104.8 W·m−2. In addition, the film’s transmittance can be regulated by altering the polarity of the postprocessing solvent, providing an effective approach for regulating indoor light intensity and thermal balance, thereby enhancing the applicability of radiative cooling.
期刊介绍:
Nano Research is a peer-reviewed, international and interdisciplinary research journal that focuses on all aspects of nanoscience and nanotechnology. It solicits submissions in various topical areas, from basic aspects of nanoscale materials to practical applications. The journal publishes articles on synthesis, characterization, and manipulation of nanomaterials; nanoscale physics, electrical transport, and quantum physics; scanning probe microscopy and spectroscopy; nanofluidics; nanosensors; nanoelectronics and molecular electronics; nano-optics, nano-optoelectronics, and nano-photonics; nanomagnetics; nanobiotechnology and nanomedicine; and nanoscale modeling and simulations. Nano Research offers readers a combination of authoritative and comprehensive Reviews, original cutting-edge research in Communication and Full Paper formats. The journal also prioritizes rapid review to ensure prompt publication.