Advanced Materials· 2025Q1
Bioinspired Hierarchical Radiative‐Phase Change Hybrid Cooling Composite with Record‐Breaking Cooling Power
- 92citations
- Q1SCImago
- 2025year
Short summary
A novel bioinspired composite material achieves a record-breaking radiative-phase change hybrid cooling power of 226 W m⁻², a 50% increase over conventional materials, by integrating microstructured cellulose with phase change capsules.
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Key points
- Developed a nacre-pearl-inspired hierarchical radiative-phase change hybrid cooling (RPHC) composite using a water pre-removal strategy.
- Achieved high solar reflectivity (0.969) and mid-infrared emissivity (0.958) with a latent heat of 132.1 J g⁻¹.
- Demonstrated a record RPHC cooling power of 226 W m⁻², leading to an average 10.1 °C temperature reduction below ambient.
- Potential application to building envelopes could reduce cooling energy use by up to 4.4% and cut global CO₂ emissions by 1.22 billion metric tons annually.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Passive daytime radiative cooling (PDRC) offers a sustainable route to reducing cooling energy consumption and greenhouse gas emissions. However, conventional PDRC materials exhibit limited cooling power (<150 W m −2 ), insufficient for growing cooling demands. While integrating phase change materials enhances cooling capacity, to balance radiative cooling, latent heat, and heat transfer performances remains challenging due to their conflicting requirements. Inspired by the light scattering mechanism of nacre‐pearl systems, hierarchically microstructured radiative‐phase change hybrid cooling (RPHC) composites with a homogeneous morphology are developed via a water pre‐removal strategy. The composite combines a multilayered microfibrillated cellulose (MFC) matrix with core–shell phase change capsules (PCCs), achieving solar reflectivity of 0.969 and mid‐infrared emissivity of 0.958. Efficient PCC integration provides a high latent heat of 132.1 J g −1 . This nacre‐pearl‐inspired design enables a record‐high PRHC power of 226 W m −2 and an average temperature reduction of 10.1 °C below ambient. Applied to building envelopes, the MFC/PCC composite reduces cooling energy use by up to 4.4%, potentially cutting global CO 2 emissions by 1.22 billion metric tons annually. Overall, this work provides innovative energy‐saving materials for energy savings and carbon neutrality.
The authors' abstract, as published at the source. Advanced Materials, 2025 · DOI ↗
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Field: Civil and Structural Engineering
Civil and Structural EngineeringEngineering