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Studying Normal Tissue Radiation Effects using Extracellular Matrix Hydrogels
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Bioinspired Entangled Hydrogels with Evaporative and Radiative Cooling for Self-Adaptive Temperature Management.

Libin Sun1,2,3, Da-Wen Sun1,2,3,4, Liang Xu1,2,3

  • 1School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China.

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Summary

Researchers developed a novel hydrogel for passive cooling, inspired by plants. This zero-energy material significantly reduces temperatures and preserves food quality by combining spectrum modulation, water evaporation, and radiative cooling.

Keywords:
entangled hydrogelevaporation coolingquality preservationradiative coolingtemperature managementthermoresponsive hydrogel

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Area of Science:

  • Materials Science
  • Sustainable Energy
  • Food Science

Background:

  • Passive temperature management is crucial for energy conservation and food preservation.
  • Existing methods often require energy input or lack efficiency.
  • Plant-inspired strategies offer novel solutions for zero-energy cooling.

Purpose of the Study:

  • To synthesize a novel hydrogel for passive cooling applications.
  • To investigate the hydrogel's properties for temperature regulation and food preservation.
  • To demonstrate a zero-energy consumption cooling solution.

Main Methods:

  • Synthesized an entangled porous hydrogel via copolymerization of N-isopropylacrylamide (NIPAM) and butyl acrylate (BA) using a cross-linker-free strategy.
  • Characterized the hydrogel's optical properties (transmittance, reflectance) and mechanical strength.
  • Evaluated the hydrogel's performance in subambient temperature achievement and food quality preservation.

Main Results:

  • The hydrogel exhibited reversible transparency alteration with high solar transmittance modulation (>63.92%) and reflectance modulation (>43.99%).
  • Achieved subambient temperatures of ~6 °C under sunlight via integrated spectrum modulation, water evaporation, and radiative cooling.
  • Successfully preserved pear quality by preventing sunburn damage.

Conclusions:

  • The cross-linker-free hydrogel provides an effective solution for passive temperature management.
  • The material's enhanced mechanical properties broaden its application potential.
  • This zero-energy approach offers significant promise for sustainable cooling and food preservation.