Subambient daytime radiative cooling of vertical surfaces

Science, Год журнала: 2024, Номер 386(6723), С. 788 - 794

Опубликована: Ноя. 14, 2024

Subambient daytime radiative cooling enables temperatures to passively reach below ambient temperature, even under direct sunlight, by emitting thermal radiation toward outer space. This technology holds promise for numerous exciting applications. However, previous demonstrations of subambient require surfaces that directly face the sky, and these cannot be applied vertical are ubiquitous in real-world scenarios such as buildings vehicles. Here, we demonstrate peak sunlight using a hierarchically designed, angularly asymmetric, spectrally selective emitter. Under about 920 watts per square meter, our emitter reaches temperature is 2.5°C corresponding reduction 4.3° 8.9°C compared with silica-polymer hybrid cooler commercial white paint, respectively.

Язык: Английский

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Bioinspired Metafabric with Dual‐Gradient Janus Design for Personal Radiative and Evaporative Cooling

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 12, 2024

Abstract Personal radiative cooling fabrics are a promising zero‐energy solution for creating cool and comfortable microclimate outdoor crowds. Despite significant progress, achieving efficient under some extreme situations, such as thermal shock intensive physical activity, remains challenge. Herein, bioinspired metafabric with dual‐gradient Janus design is reported personal evaporative cooling. The hierarchical fiber structure allows an excellent solar reflectance of 99.4% mid‐infrared emittance 0.94, inducing skin temperature drop 17.8 °C intense sunlight. Mesoporous silica nanoparticles fixed in the fibrous network can store capacity by atmospheric moisture‐absorption mild humid nighttime release moisture‐desorption hot daytime, providing additional 2.5 °C. Dual‐gradient endows outstanding sweat‐wicking effect high‐performance sweat capacity. In steady‐state evaporation tests, maximum consumption only 0.5 ml h −1 to temperature, preventing harmful excessive sweating. Additionally, also possesses favorable wearability color expansibility. Given these first‐rate features, will pave way development advanced functional fabrics.

Язык: Английский

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Recent Advances in Next‐Generation Textiles

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 5, 2025

Textiles have played a pivotal role in human development, evolving from basic fibers into sophisticated, multifunctional materials. Advances material science, nanotechnology, and electronics propelled next-generation textiles beyond traditional functionalities, unlocking innovative possibilities for diverse applications. Thermal management incorporate ultralight, ultrathin insulating layers adaptive cooling technologies, optimizing temperature regulation dynamic extreme environments. Moisture utilize advanced structures unidirectional transport breathable membranes, ensuring exceptional comfort activewear outdoor gear. Protective exhibit enhanced features, including antimicrobial, antiviral, anti-toxic gas, heat-resistant, radiation-shielding capabilities, providing high-performance solutions healthcare, defense, hazardous industries. Interactive integrate sensors monitoring physical, chemical, electrophysiological parameters, enabling real-time data collection responses to various environmental user-generated stimuli. Energy leverage triboelectric, piezoelectric, hygroelectric effects improve energy harvesting storage wearable devices. Luminous display textiles, electroluminescent fiber optic systems, enable visual applications fashion communication. These advancements position at the forefront of materials significantly expanding their potential across wide range

Язык: Английский

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Large-scale continuous production of cellulose/hollow SiO2 composite aerogel fibers for outdoor all-day radiation cooling

Nano Energy, Год журнала: 2025, Номер unknown, С. 110688 - 110688

Опубликована: Янв. 1, 2025

Язык: Английский

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Space-to-ground infrared camouflage with radiative heat dissipation

Light Science & Applications, Год журнала: 2025, Номер 14(1)

Опубликована: Март 26, 2025

Abstract With the development of space exploration and exploitation, it is imperative to address potential threats posed objects, particularly ground-based infrared observation. However, in extreme environment, achieving camouflage across different bands with simultaneous thermal management challenging has so far slipped out concern. Here, we propose space-to-ground strategy, compatible radiative heat dissipation. Camouflage H, K, mid-wave-infrared (MWIR), long-wave-infrared (LWIR) achieved through a multilayer structure, dissipation very-long-wave-infrared (VLWIR) band. High absorptivity (0.839/0.633) H/K minimizes reflected signal solar radiation low emissivity (0.132/0.142) MWIR/LWIR suppresses signal. Additionally, high (0.798) VLWIR band ensures efficient management, resulting temperature decrement 39.8 °C metal reference simulated environment (with 1200 W m − 2 input). This work inspires sophisticated spectral manipulation environments guides techniques for objects.

Язык: Английский

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Advancing Efficiency in Solar-Driven Interfacial Evaporation: Strategies and Applications

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 8, 2025

Solar-driven interfacial evaporation (SDIE) has emerged as a promising technology for addressing global water scarcity by utilizing solar-thermal conversion and at the air/material/water interface. The exceptional performance of these systems attracted significant interest; it is imperative to establish rigorous scientific standards evaluating effectiveness, optimizing system design, ensuring efficient practical applications. In this Review, we propose consensus criteria accurately assessing guiding future advancements. We then explore fundamental mechanisms driving synergy, emphasizing how material compositions, microscopic hierarchical structures, macroscopic three-dimensional spatial architecture designs enhance solar absorption photothermal conversion; balance heat confinement with pathway optimization; manage salt resistance; regulate enthalpy during vaporization. These matched coordination strategies are crucial maximizing target SDIE efficiency. Additionally, investigate applications technologies, focusing on cutting-edge progress versatile purification, combined atmospheric harvesting, collection, electric generation, deicing. Finally, highlight challenges exciting opportunities advancing research, efforts integrate principles, system-level collaboration, application-driven approaches boost sustainable highly energy technologies. By linking evaluation optimization influencing factors, offer comprehensive overview field outlook that promotes clean production synergistic

Язык: Английский

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Multifunctional Smart Fabrics with Integration of Self-Cleaning, Energy Harvesting, and Thermal Management Properties

ACS Nano, Год журнала: 2024, Номер 18(45), С. 31085 - 31097

Опубликована: Окт. 31, 2024

Due to their good wearability, smart fabrics have gradually developed into one of the important components multifunctional flexible electronics. Nevertheless, function integration is typically accomplished through intricate stacking diverse modules, which inevitably compromises comfort and elevates processing complexities. The these discrete functional modules a unified design for represents superior solution. Here, we put forward rational approach typical challenges thermal management, energy supply, surface contamination in fabrics. This sandwich-structured multilayer fabric (MLF) obtained by continuous electrospinning two layer P(VDF-HFP) functionalized with core–shell SiO2/ZnO/ZIF-8 (SZZ) nanoparticles. Specifically, MLFs achieve effective stable harvesting triboelectric nanogenerators (TENGs) hydrophobicity antibacterial properties. Meanwhile, also high mid-infrared emissivity sunlight reflectivity, successfully realizing radiative cooling under different climates, been applied wearing clothing, roof shading, car covers. work may contribute manufacturing next-generation wearable electronics, particularly terms devices.

Язык: Английский

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Wind‐Proof and Moisture Permeability Aerogel‐Functionalized Textile as All‐Seasonal Passive Thermal Regulators

Advanced Functional Materials, Год журнала: 2024, Номер 34(49)

Опубликована: Авг. 23, 2024

Abstract Individuals are easily threatened by heat stress or hypothermia in outdoor environments. Therefore, there is a pressing necessity for thermal regulation materials capable of adapting to temperature shocks. Herein, an aerogel‐functionalized textile as passive regulator (AT‐PTR) designed and demonstrated, comprising heating side composed carbon nanotube‐modified cotton fabric cooling built silica poly(vinylidene‐co‐hexafluoropropene) P(VdF‐HFP) nanofibers. The AT‐PTR demonstrates exceptional solar absorption on the side, achieving warming performance 23.2 °C cold winter. On its high reflectance infrared emissivity facilitate sub‐ambient effect 12.7 during hot summer. Moreover, field tests conducted across various regions seasons demonstrate all‐seasonal human management capability. Additionally, exhibits outstanding wind‐proof moisture permeability, flow can be simply attained flipping AT‐PTR, ensuring sustained comfort individuals

Язык: Английский

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Research Advances in Electrospun Nanofiber Membranes for Non-Invasive Medical Applications

Micromachines, Год журнала: 2024, Номер 15(10), С. 1226 - 1226

Опубликована: Сен. 30, 2024

Non-invasive medical nanofiber technology, characterized by its high specific surface area, biocompatibility, and porosity, holds significant potential in various domains, including tissue repair biosensing. It is increasingly becoming central to healthcare offering safer more efficient treatment options for contemporary medicine. Numerous studies have explored non-invasive nanofibers recent years, yet a comprehensive overview of the field remains lacking. In this paper, we provide summary applications electrospun fields, considering multiple aspects perspectives. Initially, introduce electrospinning nanofibers. Subsequently, detail their health, health monitoring, personal protection, thermal regulation, wound care, highlighting critical role improving human health. Lastly, paper discusses current challenges associated with offers insights into future development trajectories.

Язык: Английский

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Thermal management with innovative fibers and textiles: manipulating heat transport, storage and conversion

National Science Review, Год журнала: 2024, Номер 11(10)

Опубликована: Авг. 22, 2024

Thermal management is essential for maintaining optimal performance across various applications, including personal comfort, electronic systems and industrial processes. Thermal-management fibers textiles have emerged as innovative solutions to manipulate heat transport, storage conversion efficiently. This review explores recent advancements in material innovations this field. We summarize the novel designed controlling transport through different pathways, progress developing phase-change-material-based regulation, application of photothermal conversion, Joule heating thermoelectric effect energy routes advanced textiles. Furthermore, we discuss challenges future perspectives It believed that ongoing research development promise bring about thermal-management catering demands multiple sectors.

Язык: Английский

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