Phase Change Material-Based Film toward Enhanced Radiative Cooling and Mitigation of Overcooling

Xiang, Bo; Xu, Peng; Li, Renzhi; Zhang, Rong

doi:10.1021/acsapm.3c02194

Cited by 5 publications

References 51 publications

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Multifunctional Wood Composite Aerogel with Integrated Radiant Cooling and Fog–Water Harvesting for All‐Day Building Energy Conservation

Yu,

Wei,

Pang

et al. 2024

Adv Funct Materials

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Passive radiative cooling, as a cooling technique with no energy input, can continuously radiate heat into the supercooled universe. However, the continuous cooling effect tends to cause the problem of nighttime overcooling. Moreover, non‐renewable radiative cooling materials and energy‐intensive processing methods lead to increased carbon emissions and resource consumption. Therefore, there is an urgent need to develop a renewable and environmentally friendly self‐adaption radiative cooling thermal management material. In this paper, a high‐performance self‐adaption thermal management wood composite aerogel material is designed and prepared by in situ growth of multi‐scale silicon dioxide on wood. The constructed passive radiative cooling material has a sub‐ambient cooling effect of up to 13.5 °C and 20.2 °C during daytime in winter and summer, respectively. Meanwhile, it has a certain thermal insulation performance (2.0 °C above ambient) due to low thermal conductivity (0.063370 ± 0.000329 W m−1 k−1) at night in winter. In addition, the material is also suitable for fog–water harvesting (fog–water harvesting rate of 59.27 ± 0.76 mg min−1) due to its hydrophobicity. This work can significantly promote the practical application of passive radiative cooling materials.

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Multifunctional Wood Composite Aerogel with Integrated Radiant Cooling and Fog–Water Harvesting for All‐Day Building Energy Conservation

Yu,

Wei,

Pang

et al. 2024

Adv Funct Materials

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Highly Integrated Phase Change and Radiative Cooling Fiber Membrane for Adaptive Personal Thermal Regulation

Zhu,

Bashir,

et al. 2024

Adv Funct Materials

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Environmental heat influx often limits the effectiveness of radiative cooling materials, particularly in wearable applications where thermal comfort is paramount. This study introduces an innovative solution for personal thermal management through radiative cooling phase change (RC‐PC) fiber membranes. Fabricated by coaxial electrospinning, these membranes combine a poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV) and tetraethyl orthosilicate (TEOS) composite shell, encapsulating n‐octadecane as the core phase change material. The membranes demonstrate exceptional optical performance, with a solar reflectivity of 95.0% and an emissivity of 88.6% within the atmospheric window, effectively minimizing ambient heat absorption. The n‐octadecane‐infused fibers (0.3 mL h−1 C18@TEOS/PHBV) exhibit a phase change enthalpy of 88.3 J g−1, reducing heating rates and improving cooling by ≈1 °C at dawn. Under typical solar radiation (939.5 W m−2), the membranes provide an average cooling power of 89.0 W m−2, peaking at 95.3 W m−2. Notably, they achieve a cooling reduction of 5.1 °C under 550.2 W m−2, maintaining temperatures significantly lower than conventional fabrics, with a differential of 4.4 °C compared to medical protective clothing. These findings underscore the potential of RC‐PC fiber membranes for sustainable, efficient personal thermal management.

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Development of multifunctional passive cooling PE composites with high reflectivity and flame retardancy by combining inorganic flame retardant and organic aromatic compound

Wang,

et al. 2024

Vinyl Additive Technology

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In recent years, the pressing issue of energy problems has led to increased interest in passive cooling materials due to their energy‐saving potential. In this work, antimony trioxide (Sb2O3) and decabromodiphenylethane (DBDPE) were added into polyethylene (PE) composites to obtain cooling materials with high reflectivity and flame retardancy. With 7 wt% Sb2O3 and 21 wt% DBDPE, the reflectance of samples in all solar wavelengths was greatly improved by at least 47.76%. Furthermore, the internal temperature of the self‐designed temperature test device was reduced from 47.1 to 28.4 °C with a sunlight simulator at a light intensity of 1000 W/m2 for 1 h at an indoor temperature of 25 °C. In addition, the UL‐94 vertical flammability rating was upgraded from No Rating to V‐0, and the limiting oxygen index value increased by at least 6.2%. The selection of a PE matrix with a higher degree of crystallinity resulted in enhanced mechanical properties. These multifunctional PE composites have the advantage in its high reflectance across all solar wavelengths and relatively good flame retardancy. Evidently, resultant characteristics make these composites potential candidates for application in the passive cooling field.Highlights Inorganic and organic particles were incorporated into the PE matrix. Multifunctional reflective cooling composites were prepared. The factors affecting the reflectivity of composites were analyzed.

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Phase Change Material-Based Film toward Enhanced Radiative Cooling and Mitigation of Overcooling

Cited by 5 publications

References 51 publications

Multifunctional Wood Composite Aerogel with Integrated Radiant Cooling and Fog–Water Harvesting for All‐Day Building Energy Conservation

Multifunctional Wood Composite Aerogel with Integrated Radiant Cooling and Fog–Water Harvesting for All‐Day Building Energy Conservation

Highly Integrated Phase Change and Radiative Cooling Fiber Membrane for Adaptive Personal Thermal Regulation

Development of multifunctional passive cooling PE composites with high reflectivity and flame retardancy by combining inorganic flame retardant and organic aromatic compound

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