Heat-shedding with photonic structures: radiative cooling and its potential

Heo, Se‐Yeon; Lee, Gil Ju; Song, Young Min

doi:10.1039/d2tc00318j

Cited by 28 publications

(20 citation statements)

References 200 publications

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“…Novel cooling structures based on heat dissipation mechanisms for flexible/wearable devices: (1) high-thermal-conductivity materials; (2) passive radiative cooler; (3) evaporative textile; (4) phase change material; and (5) TE device. Reproduced with permission [115] . Copyright 2020, Springer Nature [43] .…”

Section: Thermal Management Through Heat Transfer Modementioning

confidence: 99%

Recent progress in thermal management for flexible/wearable devices

Yun¹

2023

Soft Sci

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Thermal management for wearable devices is evolving to make ubiquitous applications possible based on advanced devices featuring miniaturization, integration, and ultrathin designs. Thermal management and control integrated with wearable devices are highly desirable for various applications for human body monitoring, including external heat exposure and metabolic heat generation, in various activities. Recently, dynamic change materials have been integrated with micro/nano thermal management platforms to address the potential for active thermal management. In this article, recent advances in the architecture of effective thermal management in wearable devices are reviewed, along with the essential mechanisms for managing thermal conditions for users in external/internal thermal environments. Appropriate thermal management approaches are proposed for the design and integration of materials/structures tailored to specific targets in wearable devices. In particular, this review is devoted to materials/structures based on five thermal management strategies: conduction, radiation, evaporation/convection, heat absorption/release, and thermoelectric (TE). Finally, the challenges and prospects for practical applications of thermal management in wearable devices are discussed.

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Section: Thermal Management Through Heat Transfer Modementioning

confidence: 99%

Recent progress in thermal management for flexible/wearable devices

Yun¹

2023

Soft Sci

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“…For radiative cooling textiles, the thermoregulatory features rely on the construction of solar scattering structures, which originates from the delicate morphology design to attain a very broad distribution of porosity or hierarchical morphologies with sizes much larger than the transport mean free path of light, ,, and the MIR emission depends on the chemical bonds (e.g., C–O–C, C–OH) that vibrate at 8–13 μm. − Therefore, the introduction of specific components with abundant chemical bonds is a feasible way to enhance the MIR emission. Metal–organic frameworks (MOFs) as well-developed functional materials with tunable organic ligands and designable functionalities may offer the possibility to further broaden the application with an enhanced cooling effect and requirement of tailored functional design. − …”

Section: Introductionmentioning

confidence: 99%

MOF-Integrated Hierarchical Composite Fiber for Efficient Daytime Radiative Cooling and Antibacterial Protective Textiles

Cai

Gao

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Incorporating passive radiative cooling into textiles is an effective way to improve individual personalized thermophysiological comfort for the human body. Based on radiative cooling textile design, rational functionalization further facilitates practical applications, especially for medical protective products with customized requirements. Herein, we present a hierarchical polyurethane/metal−organic framework (MOF) composite nanofiber membrane with an integrated radiative cooling effect and photocatalytic antibacterial property. Fabricated by a scalable electrospinning method, the hierarchical nanofiber membrane shows high solar reflectance of 97% and improved thermal emissivity of 93% attributed to the abundant chemical bonds in ZIF-8 nanoparticles, rendering a temperature drop of ∼7.2 °C under direct sunlight and ∼5.5 °C at night. In addition, the photocatalytic activity of ZIF-8 ensures a 96% bacterial mortality rate for preventing bacterial infection. In practical application, our composite fabric can prevent superheating by 4.4 °C compared with the traditional protective suit under direct sunlight. Along with its anti-infection ability, the composite fabric is desirable for medical protective textiles. The innovative integration of passive radiative cooling design and functional MOFs breaks through the traditional cooling mode and provides huge substantial advantages for smart textiles and personal cooling applications.

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“…1,2 Passive daytime radiative cooling (PDRC) is a promising future technology for building cooling and renewable energy harvesting, which can realize subambient cooling performance under direct sunlight by simultaneously reecting sunlight (0.3-2.5 mm) and emitting infrared thermal radiation to the cold outer space (∼3 K) 3 through the mid-infrared (MIR) atmospheric transparent window (8-13 mm). [4][5][6][7][8][9] Recently, researchers have successfully designed numerous PDRC materials and structures with both high solar reectance R solar and high infrared thermal emissivity 3 IR through the atmospheric window, such as photonic structures, 10-14 metamaterials, [15][16][17] nanoparticles, 10,[18][19][20][21][22] porous structures, [23][24][25][26] and bio-inspired materials. [27][28][29] Although these PDRC structures have good radiative cooling performance, their designs and approaches are either complicated or expensive, which makes them unsuitable for widespread eld applications in infrastructure.…”

Section: Introductionmentioning

confidence: 99%