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Updated: Jun 28, 2025

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Thermal-Rectified Gradient Porous Polymeric Film for Solar-Thermal Regulatory Cooling.

Yufeng Wang1, Xiaobo Zhang2, Song Liu1

  • 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P.R. China.

Advanced Materials (Deerfield Beach, Fla.)
|April 12, 2024
PubMed
Summary

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A Comprehensive Review on Fabrication and Structural Design of Polymer Composites for Wearable Pressure Sensors.

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3D-Printed Phase-Change Porous Monoliths for Adaptive Radiative Cooling with High Solar Reflectance and Latent Heat Buffering.

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4-Methylpyridine-Mediated Homogenization of Wide-Bandgap Perovskite Films for Efficient All-Perovskite Tandem Solar Cells.

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ACS applied materials & interfaces·2025

Researchers developed a gradient porous film for advanced solar-thermal regulation. This material offers superior thermal insulation and heat dissipation, crucial for smart buildings and cooling textiles.

Area of Science:

  • Materials Science
  • Polymer Science
  • Thermal Engineering

Background:

  • Solar-thermal regulation is critical for energy efficiency in smart buildings and cooling textiles.
  • A key challenge is balancing heat insulation with efficient heat dissipation.
  • Existing materials often struggle to meet these conflicting demands.

Purpose of the Study:

  • To develop a novel material for effective solar-thermal management.
  • To address the contradiction between preventing heat infiltration and dissipating internal heat.
  • To create a material with tunable thermal conductivity for diverse environmental conditions.

Main Methods:

  • Fabrication of a gradient porous polymeric film using concentration-gradient polymerization.
  • Utilizing an electric field to control crosslinker distribution.
Keywords:
concentration‐gradient polymerizationgradient porous filmpassive daytime radiative coolingsolar‐thermal regulationthermal rectification

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  • Employing polymerization and freeze-drying techniques.

    • Main Results:

    • The film exhibits a significant porosity gradient, enabling unidirectional thermal insulation.
    • Achieved a thermal rectification factor of 21%.
    • Demonstrated temperature reductions of 3.0 °C (unheated) and 4.1 °C (spontaneously heated) compared to uniform films.

    Conclusions:

    • The gradient porous film effectively reconciles conflicting thermal management requirements.
    • This material shows significant promise for advanced solar-thermal regulation in enclosed environments.
    • The developed technology offers a new pathway for thermal-rectified materials.