气候变化领域集成服务门户(CCPortal): Biologically inspired flexible photonic films for efficient passive radiative cooling

CCPortal

DOI	10.1073/pnas.2001802117
	Biologically inspired flexible photonic films for efficient passive radiative cooling
	Zhang H.; Ly K.C.S.; Liu X.; Chen Z.; Yan M.; Wu Z.; Wang X.; Zheng Y.; Zhou H.; Fan T.
发表日期	2020
ISSN	0027-8424
起始页码	14657
结束页码	14666
卷号	117 期号:26
英文摘要	Temperature is a fundamental parameter for all forms of lives. Natural evolution has resulted in organisms which have excellent thermoregulation capabilities in extreme climates. Bioinspired materials that mimic biological solution for thermoregulation have proven promising for passive radiative cooling. However, scalable production of artificial photonic radiators with complex structures, outstanding properties, high throughput, and low cost is still challenging. Herein, we design and demonstrate biologically inspired photonic materials for passive radiative cooling, after discovery of longicorn beetles’ excellent thermoregulatory function with their dual-scale fluffs. The natural fluffs exhibit a finely structured triangular cross-section with two thermoregulatory effects which effectively reflects sunlight and emits thermal radiation, thereby decreasing the beetles’ body temperature. Inspired by the finding, a photonic film consisting of a micropyramid-arrayed polymer matrix with random ceramic particles is fabricated with high throughput. The film reflects ∼95% of solar irradiance and exhibits an infrared emissivity >0.96. The effective cooling power is found to be ∼90.8 W·m−2 and a temperature decrease of up to 5.1 °C is recorded under direct sunlight. Additionally, the film exhibits hydrophobicity, superior flexibility, and strong mechanical strength, which is promising for thermal management in various electronic devices and wearable products. Our work paves the way for designing and fabrication of high-performance thermal regulation materials. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Bioinspired materials; Flexible photonic film; Passive radiative cooling; Thermoregulation
语种	英语
scopus关键词	animal experiment; Article; chemical structure; cooling; energy conservation; hydrophobicity; mathematical model; nonhuman; priority journal; process optimization; temperature; thermodynamics; thermoregulation
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160275
作者单位	Zhang, H., State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Ly, K.C.S., State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Liu, X., State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Chen, Z., State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China, Walker Department of Mechanical Engineering, Materials Science and Engineering Program, Texas Materials Institute, University of Texas at Austin, Austin, TX 78712, United States; Yan, M., Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, Kista, 16440, Sweden; Wu, Z., Walker Department of Mechanical Engineering, Materials Scienc...
推荐引用方式 GB/T 7714	Zhang H.,Ly K.C.S.,Liu X.,et al. Biologically inspired flexible photonic films for efficient passive radiative cooling[J],2020,117(26).
APA	Zhang H..,Ly K.C.S..,Liu X..,Chen Z..,Yan M..,...&Fan T..(2020).Biologically inspired flexible photonic films for efficient passive radiative cooling.Proceedings of the National Academy of Sciences of the United States of America,117(26).
MLA	Zhang H.,et al."Biologically inspired flexible photonic films for efficient passive radiative cooling".Proceedings of the National Academy of Sciences of the United States of America 117.26(2020).