Construction of a ternary channel efficient passive cooling composites with solar-reflective, thermoemissive, and thermoconductive properties

Yang, Zhangbin; Zichen, Zhou; Sun, Haoxuan; Chen, Tingting; Zhang, Jun

doi:10.1016/j.compscitech.2021.108743

Cited by 27 publications

(21 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, h-BN has a large band gap of 5.765 eV 43 , corresponding to the absorption of light with wavelengths up to approximately 215 nm. This value is even smaller than the lower bound of solar spectrum (~300 nm), meaning that h-BN is intrinsically unable to absorb sunlight and thus favorable for a low solar heat gain 44 .…”

Section: Design and Additive Freeze-casting Of Large-scale Anisotropi...mentioning

confidence: 93%

Scalable anisotropic cooling aerogels by additive freeze-casting

et al. 2022

View full text Add to dashboard Cite

Cooling in buildings is vital to human well-being but inevitability consumes significant energy, adding pressure on achieving carbon neutrality. Thermally superinsulating aerogels are promising to isolate the heat for more energy-efficient cooling. However, most aerogels tend to absorb the sunlight for unwanted solar heat gain, and it is challenging to scale up the aerogel fabrication while maintaining consistent properties. Herein, we develop a thermally insulating, solar-reflective anisotropic cooling aerogel panel containing in-plane aligned pores with engineered pore walls using boron nitride nanosheets by an additive freeze-casting technique. The additive freeze-casting offers highly controllable and cumulative freezing dynamics for fabricating decimeter-scale aerogel panels with consistent in-plane pore alignments. The unique anisotropic thermo-optical properties of the nanosheets combined with in-plane pore channels enable the anisotropic cooling aerogel to deliver an ultralow out-of-plane thermal conductivity of 16.9 mW m−1 K−1 and a high solar reflectance of 97%. The excellent dual functionalities allow the anisotropic cooling aerogel to minimize both parasitic and solar heat gains when used as cooling panels under direct sunlight, achieving an up to 7 °C lower interior temperature than commercial silica aerogels. This work offers a new paradigm for the bottom-up fabrication of scalable anisotropic aerogels towards practical energy-efficient cooling applications.

show abstract

Section: Design and Additive Freeze-casting Of Large-scale Anisotropi...mentioning

confidence: 93%

Scalable anisotropic cooling aerogels by additive freeze-casting

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The large band gap of h-BN corresponds to the absorption of light with a wavelength less than 250 nm, meaning it is conducive to the low low solar heat gain. 96 Chan et al 97 used 2D boron nitride nanosheets (BNNS) exfoliated from bulk h-BN powders and additive freeze-casting technique with waterborne polyurethane (WPU) as matrix to prepare decimeter-scale aerogel panel with consistent planar inner pore arrangement (Fig. 7e–g).…”

Section: Development Of Organic–inorganic Composite Radiative Cooling...mentioning

confidence: 99%

Recent progress in organic-based radiative cooling materials: fabrication methods and thermal management properties

Ding

Kong

et al. 2023

Mater. Adv.

View full text Add to dashboard Cite

show abstract

“…43 One of the proposed strategies to develop thermal management structures is using thermally conductive fillers such as boron nitride (BN). 212,213 Using a well interpenetrated BN network within a nanofibrous membrane, highly thermal conductive breathable NFMs can be developed. 7 In-plane and out-plane thermal conductivity was 17.9 and 0.29 W m À1 K À1 , in the composite membrane obtained in this method.…”

Section: Thermal Conductive Membranesmentioning

confidence: 99%

A review on emerging developments in thermal and moisture management by membrane‐based clothing systems towards personal comfort

Gorji

Mazinani

Gharehaghaji

2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

Enhanced heat and moisture management has become highly urgent to clothing systems due to the global need to personalize the ventilation process. As a significant sector of apparel industries, membrane‐based clothing systems offer protection and ventilation functionalities. This review aims at providing a new viewpoint on efforts to improve heat and moisture management in membrane‐based clothing systems according to the latest advances in this field. The study terminates with presenting a perspective on current challenges and opportunities for future research directions in personal thermal and moisture management technologies. In fact, membranes with different functionalities used in clothing systems such as photonic membranes with heating and cooling performances, unidirectional liquid transport membranes, waterproof‐breathable membranes, shape‐memory membranes, thermoregulating membranes, thermal conductive membranes and finally protective membranes are investigated. The essential functions associated to different categories of the investigated membranes along with the relationships between membrane structure and properties are presented.

show abstract

Construction of a ternary channel efficient passive cooling composites with solar-reflective, thermoemissive, and thermoconductive properties

Cited by 27 publications

References 34 publications

Scalable anisotropic cooling aerogels by additive freeze-casting

Scalable anisotropic cooling aerogels by additive freeze-casting

Recent progress in organic-based radiative cooling materials: fabrication methods and thermal management properties

A review on emerging developments in thermal and moisture management by membrane‐based clothing systems towards personal comfort

Contact Info

Product

Resources

About