Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract Scalable and cost‐efficient porous structural materials, characterized by their thermal insulation solar scattering properties, hold significant promise as radiative cooling solutions for zero‐energy regulation of objects subjected to sunlight high temperatures. However, the intrinsic restricts capacity effectively dissipate excess internal heat, thereby limiting applicability in scenarios within above‐ambient enclosed environments. Herein, a directional freeze‐casting strategy is presented preparing highly aligned nanocomposite aerogel. This aerogel demonstrates anisotropy factor 3.48, indicating markedly enhanced conductivity axial direction ascribing dual orientation skeletal walls space‐confined arrangement thermally conductive nanosheets. also reflectance 95.3% facilitated design hierarchical pore structures backscattering properties embedded 2D Consequently, this functions multi‐scenario cooler, achieving temperature reductions 3.3 15.9 °C sub‐ambient environments exposed study significantly expands materials cooling, addressing limitations conventional heat‐generating

Language: Английский