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Related Experiment Video

Updated: May 6, 2026

TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method
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Microstructured Reflective Coatings on Commodity Textiles for Passive Personal Cooling.

Evan D Patamia1, Megan K Yee1, Trisha L Andrew1,2

  • 1Department of Chemistry, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States.

ACS Applied Materials & Interfaces
|October 18, 2024
PubMed
Summary

Researchers developed a new textile coating using calcium carbonate and barium sulfate nanoparticles for passive personal cooling. This innovative fabric technology can significantly reduce body temperature, offering effective cooling even in direct sunlight.

Keywords:
calcium carbonatechemical vapor depositioncoatingcrystal growthradiative cooling

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Area of Science:

  • Materials Science
  • Textile Engineering
  • Thermal Management

Background:

  • Climate change necessitates advanced personal thermal homeostasis solutions.
  • Conventional textiles offer limited thermal regulation capabilities.
  • Advanced materials can manipulate light for passive heating or cooling.

Purpose of the Study:

  • To develop a passive personal cooling strategy using common clothing.
  • To create a functional textile coating for radiative cooling applications.
  • To assess the performance and durability of the coated fabrics.

Main Methods:

  • Utilized Mie scattering and finite-difference time domain simulations to identify suitable reflective nanoparticles (calcium carbonate and barium sulfate).
  • Developed a stepwise coating process involving photoinitiated chemical vapor deposition and ion-exchange crystal growth.
  • Applied a lamellar composite coating of alternating CaCO3 and BaSO4 nano/microparticle layers onto polyester poplin fabric.

Main Results:

  • Coated fabric demonstrated a cooling ability of up to 8 °C compared to uncoated samples.
  • Achieved a maximum cooling of 6 °C below ambient temperature under direct sunlight.
  • Coating exhibited no mechanical degradation or performance attenuation after wash and durability tests, providing up to 3.4 °C sub-ambient cooling in built environments.

Conclusions:

  • Common fabrics can be transformed into effective passive cooling implements.
  • The developed lamellar composite coating offers a resilient and long-term solution for personal thermal management.
  • This technology presents a promising approach for combating heat stress in various environments.