Supramolecularly Connected Armor-like Nanostructure Enables Mechanically Robust Radiative Cooling Materials
writer：Peng Zhou, Yuyan Wang,* and Xinxing Zhang*
keywords：passive daytime radiative cooling (PDRC), supramolecular interactions, interlayer nanostructure, bioinspired materials, mechanical properties
source：期刊
Issue time：2024年
Passive daytime radiative cooling (PDRC) is a
promising practice to realize sustainable thermal management with
no energy and resources consumption. However, there remains a
challenge of simultaneously integrating desired solar reflectivity,
environmental durability, and mechanical robustness for polymeric
composites with nanophotonic structures. Herein, inspired by a
classical armor shell of a pangolin, we adopt a generic design
strategy that harnesses supramolecular bonds between the TiO2-
decorated mica microplates and cellulose nanofibers to collectively
produce strong interfacial interactions for fabricating interlayer
nanostructured PDRC materials. Owing to the strong light
scattering excited by hierarchical nanophotonic structures, the
bioinspired film demonstrates a desired reflectivity (92%) and
emissivity (91%) and an excellent temperature drop of 10 °C
under direct sunlight. Notably, the film guarantees high strength (41.7 MPa), toughness (10.4 MJ m?3), and excellent environmental
durability. This strategy provides possibilities in designing polymeric PDRC materials, further establishing a blueprint for other
functional applications like soft robots, wearable devices, etc.