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<p>The global cold chain consumes vast amounts of energy and emits greenhouse gases, while many regions lack proper refrigeration. To address this, we developed a dual-layer electrospun membrane (PZ-PML) for energy-free fruit preservation. The top PVDF-HFP/ZIF-8 layer offers 97.64% solar reflectance and 92.5% mid-infrared emissivity, providing 70 W/m<sup>2</sup> radiative cooling. The bottom PAN/MIL-101/LiCl layer, with 2.18 g/g water uptake at 80% RH, delivers ∼156 W/m<sup>2</sup> evaporative cooling, lowering surface temperature by 6.1 °C under ∼400 W/m<sup>2</sup> irradiation. The membrane also shows ⩾99% antibacterial efficiency against <i>E. coli</i> and <i>S. aureus</i>. Applied to strawberries, it reduced dehydration to 20.2% after 9 days, compared to 68.2% and 74.4% in controls. Additionally, it demonstrates durability, superhydrophobicity, and UV stability. This scalable solution offers energy-free fruit cooling, reducing postharvest losses while maintaining quality and safety.</p>

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MOF-based hierarchical bilayer membranes for radiative evaporative cooling in fruit preservation

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Zhuochen Huang,
  • Gangzhou Li,
  • Chaohua Qin,
  • Jingsong Yao,
  • Wanyuan Li,
  • Dapeng Lei,
  • Kunfeng Liu,
  • Li Chen,
  • Di Guo,
  • Yin Ning,
  • Jizhuang Wang,
  • Dan Li

摘要

The global cold chain consumes vast amounts of energy and emits greenhouse gases, while many regions lack proper refrigeration. To address this, we developed a dual-layer electrospun membrane (PZ-PML) for energy-free fruit preservation. The top PVDF-HFP/ZIF-8 layer offers 97.64% solar reflectance and 92.5% mid-infrared emissivity, providing 70 W/m2 radiative cooling. The bottom PAN/MIL-101/LiCl layer, with 2.18 g/g water uptake at 80% RH, delivers ∼156 W/m2 evaporative cooling, lowering surface temperature by 6.1 °C under ∼400 W/m2 irradiation. The membrane also shows ⩾99% antibacterial efficiency against E. coli and S. aureus. Applied to strawberries, it reduced dehydration to 20.2% after 9 days, compared to 68.2% and 74.4% in controls. Additionally, it demonstrates durability, superhydrophobicity, and UV stability. This scalable solution offers energy-free fruit cooling, reducing postharvest losses while maintaining quality and safety.