Transparent and Flexible Thermal Insulation Window Material

Cell Reports Physical Science

Shenqiang Ren¹  Yuzi Liu²  Guibin Ma³  Jun Liu³  Thomas Thundat³  Changning Li⁴  Lu An⁴  Yong Hu⁴  Feng Hu⁴  Yulong Huang⁴ 

[1] Research and Education in Energy, Environment, &Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL 60439, USA;Department of Chemical and Biochemical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA;Department of Mechanical and Aerospace Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA;

关键词: thermal insulation;    visible transparency;    nanocomposite sheet;    candle soot;    hollow silica;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: Transparent windows that insulate against infrared light and heat entering buildings hold the promise of reducing energy consumption. However, a long-standing challenge for energy-saving window materials is to concurrently achieve a large tuning of refractive index, broad transmission modulation, and near-room-temperature phase transition. Here, we report the insulation of heat and infrared radiation by using a functionally graded transparent nanocomposite consisting of a hollow network-nanoparticle hybrid. We demonstrate ΔT of 6.9°C by combining the light-reflectance properties of metallic nanoparticles and the thermal insulation of hollow shell networks, resulting in an equivalent cooling power of 396 W/m2 under a light intensity of 3 W/cm2. This flexible nanocomposite sheet shows a high transparency of 91.0%, low haze in the visible region, and a modulus of 160 MPa. The gradient nanocomposites combine UV light blocking, visible transparency, and infrared light shielding, potentially opening a new avenue for energy-saving building window applications.

【 授权许可】

Unknown