Ultra‑Light Poly(N‑isopropylacrylamide) Hydrogels: Light Weight Water Materials for Passive Thermal Management via Insulation and Cooling (IMAGE)

Shanghai Jiao Tong University Journal Center

Ultra‑Light Poly(N‑isopropylacrylamide) Hydrogels: Light Weight Water Materials for Passive Thermal Management via Insulation and Cooling

Caption

  • The hydrogel achieves an ultra-light water-based structure (0.041 g cm−3, 52.7 wt% water) by incorporating hollow foaming microspheres.
  • Sealed air pockets enable ultra-low thermal conductivity (0.034–0.039 W m−1 K−1) and over 50 °C thermal shielding under high-temperature conditions.
  • High solar reflectance (0.94) and infrared emittance (0.84) deliver up to 10.8 °C sub-ambient outdoor cooling.

Credit

Xueyan Hu, Siyuan Dou, Yiming Liu, Yaru Li, Caixia Yu, Jin Wang*.

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License

CC BY-NC-ND

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