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Updated: Jul 16, 2026

Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells
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Electrospinning CaCO3/Porous PLA Nanofibers for Daytime Radiative Cooling.

Yangyang Sun1,2, Changnai Yang1, Mengge Li1,2

  • 1Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China.

Polymers
|July 15, 2026
PubMed
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Eco-friendly nanofibers made of calcium carbonate (CaCO3) and porous polylactic acid (PLA) show excellent passive daytime radiative cooling (PDRC) performance. These biodegradable materials achieved significant temperature reduction, offering a sustainable solution for cooling applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Sustainable Engineering

Background:

  • Developing high-performance, eco-friendly passive daytime radiative cooling (PDRC) materials is crucial for sustainable thermal management.
  • Existing PDRC materials often face challenges related to performance, cost, or environmental impact.

Purpose of the Study:

  • To fabricate and characterize novel calcium carbonate (CaCO3)/porous polylactic acid (PLA) nanofibers for enhanced PDRC applications.
  • To evaluate the solar reflectivity, radiative cooling performance, and biodegradability of the developed materials.

Main Methods:

  • Electrospinning of PLA matrix with CaCO3 nanoparticles (40 nm) under high ambient humidity (>85% RH).
  • Characterization of nanofiber morphology, solar reflectivity, and PDRC performance through outdoor testing.
Keywords:
interfacenanofiberpassive daytime radiative coolingporous structure

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  • Assessment of biodegradability via 80-day soil burial test.

    • Main Results:

    • CaCO3/porous PLA nanofibers exhibited high solar reflectivity (~92.3%), surpassing pure PLA, CaCO3/PLA, and porous PLA nanofibers.
    • Optimal PDRC performance achieved, with a temperature reduction of ~10.3 °C (6.1 °C improvement over PLA).
    • Significant morphological degradation after soil burial confirmed material biodegradability.

    Conclusions:

    • Synergistic light scattering from surface porosity and CaCO3/PLA interfaces enhances solar spectrum scattering for superior PDRC.
    • The developed CaCO3/porous PLA nanofibers offer a facile strategy for high-performance, eco-friendly, and biodegradable radiative cooling materials.