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Related Experiment Video

Updated: Jan 16, 2026

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Eco-Friendly Skin-Wrinkle-Inspired Micro-Nano Structured Cellulose Composite Fibers for Highly Efficient Daytime

Qihua Li1, Jianfeng Li1, Chen Zeng1

  • 1State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.

ACS Nano
|September 26, 2025
PubMed
Summary

Researchers developed eco-friendly, coating-free radiative cooling fabrics using cellulose and silica nanoparticles. These bioinspired materials offer superior cooling performance and comfort, paving the way for sustainable thermal management solutions.

Keywords:
SiO2 nanoparticlesbionic structureradiative coolingregenerated cellulosewet-spinning

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Area of Science:

  • Materials Science
  • Textile Engineering
  • Sustainable Technologies

Background:

  • Passive radiative cooling fabrics offer sustainable thermal management but often rely on petroleum-based materials and complex coatings.
  • These conventional methods raise concerns regarding environmental impact and wearer comfort.

Purpose of the Study:

  • To develop a bioinspired, coating-free radiative cooling fabric using regenerated cellulose and silica nanoparticles (RCSF).
  • To achieve high solar reflectivity and infrared emissivity through intrinsic material properties and structural design.
  • To enhance fabric comfort through improved air permeability and moisture-wicking.

Main Methods:

  • Fabrication of RCSF via wet-spinning, mimicking the micro-nano structure of human skin.
  • Characterization of optical properties (solar reflectivity, infrared emissivity) and structural features.
  • Evaluation of thermal performance under solar irradiation and assessment of comfort properties (air permeability, moisture-wicking).

Main Results:

  • RCSF achieved high solar reflectivity (93.7%) and infrared emissivity (0.98).
  • The fabric demonstrated a net cooling power of 100.1 W m-2, resulting in a 5 °C temperature reduction.
  • Significant improvements in air permeability (75%) and moisture-wicking were observed compared to pristine cellulose fabrics.

Conclusions:

  • The bioinspired, coating-free RCSF offers a sustainable and effective solution for passive radiative cooling.
  • The one-step fabrication method is cost-effective and avoids toxic materials and energy-intensive post-treatments.
  • This approach establishes a new paradigm for eco-efficient radiative cooling materials balancing performance, comfort, and scalability.