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Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

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Published on: September 19, 2020

Radiative-Cooling Composites with Enhanced Infrared Emissivity by Structural Infrared Scattering through Indium Tin

Sanghun Park¹, Sudip Kumar Pal¹, Tohid Otoufat¹

¹Biomedical Manufacturing Technology Center, Korea Institute of Industrial Technology, Yeongcheon 38822, Republic of Korea.

ACS Applied Materials & Interfaces

|March 15, 2023

Summary

This study introduces a new radiative cooling composite material. By scattering infrared radiation within a polymer matrix, it enhances cooling performance for buildings and reduces energy consumption.

Keywords:

IR absorption coefficient IR emissivity IR scattering composites polymer film radiative cooling

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Last Updated: Aug 6, 2025

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Area of Science:

Materials Science
Sustainable Energy
Nanotechnology

Background:

Radiative cooling offers a passive method to mitigate global warming by reducing building energy needs.
Polymers are crucial for radiative cooling due to their infrared emissivity, but material optimization has been limited.
Existing research often focuses on optical geometries rather than intrinsic material properties.

Purpose of the Study:

To investigate the infrared absorption properties of various polymer types.
To introduce and demonstrate a novel radiative-cooling composite material.
To enhance radiative cooling performance by optimizing material composition.

Main Methods:

Investigated the infrared (IR) absorption coefficient of diverse polymer materials.
Developed a new concept of radiative-cooling composites by dispersing an IR scattering medium within a polymer matrix.
Utilized indium tin oxide as the IR scattering medium in a cellulose acetate polymer matrix.

Main Results:

The composite material effectively scattered and attenuated infrared radiation.
A window film fabricated from the composite demonstrated significant cooling performance.
Outdoor thermal evaluation confirmed the material's effective cooling capabilities.

Conclusions:

The developed composite material enhances radiative cooling properties.
This approach allows for improved radiative cooling performance irrespective of the base polymer type.
The findings open new avenues for developing advanced radiative cooling materials.