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Related Experiment Video

Updated: May 21, 2025

Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper
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Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper

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Biomass-based mineralized chitin microsheets for high-efficiency radiative cooling.

Pengfei Li1, Tao Zhang1, Zerong Song1

  • 1School of Materials and Energy, Southwest University, Chongqing 400715, People's Republic of China.

International Journal of Biological Macromolecules
|March 22, 2025
PubMed
Summary

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Researchers developed eco-friendly cooling material from shrimp shells. This sustainable solution reduces building temperatures and energy consumption, offering a novel approach to waste utilization and climate change mitigation.

Area of Science:

  • Materials Science
  • Environmental Science
  • Sustainable Engineering

Background:

  • Extreme heat events due to climate change increase cooling energy demands and CO2 emissions.
  • Conventional cooling systems are unsustainable and costly.
  • Existing passive radiative cooling materials have limitations like pollution and complexity.

Purpose of the Study:

  • To develop a low-cost, eco-friendly radiative cooling material from waste shrimp shells.
  • To address the limitations of traditional cooling solutions.
  • To create a sustainable material for building temperature management.

Main Methods:

  • Utilized shrimp shells' natural mineralized multiscale Bouligand structure.
  • Developed a simple chemical treatment to process shrimp shells into Mineralized Chitin-based Composite Microsheets (MCCM).
Keywords:
Bouligand structureChitin fiberNatural mineralizationRadiative coolingWaste shrimp shells

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  • Preserved the multiscale structure during processing.

    • Main Results:

    • MCCM achieved sub-ambient radiative cooling under solar irradiation.
    • Demonstrated an average temperature reduction of 4.5°C.
    • Exhibited high solar reflectance (90.0%) and mid-infrared emissivity (96.0%).
    • MCCM application to buildings enhanced energy savings (>80 GJ) and reduced CO2 emissions.
    • Material showed excellent thermal stability, flame retardancy, and recyclability as fertilizer.

    Conclusions:

    • Mineralized Chitin-based Composite Microsheets (MCCM) offer a sustainable and cost-effective radiative cooling solution.
    • This method provides high-value utilization of waste shrimp shells, promoting biomass waste recycling.
    • MCCM has significant potential for energy-efficient building temperature management and environmental sustainability.