A Hierarchically Nanofibrous Self-Cleaning Textile for Efficient Personal Thermal Management in Severe Hot and Cold Environments

ACS Nano, Journal Year: 2023, Volume and Issue: 17(18), P. 18308 - 18317

Published: Sept. 13, 2023

Climate change has recently caused more and severe temperatures, inducing a growing demand for personal thermal management at outdoors. However, designing textiles that can achieve thermoregulation without energy consumption in severely hot cold environments remains huge challenge. Herein, hierarchically nanofibrous (HNF) textile with improved insulation radiative functions is fabricated efficient temperatures. The consists of cooling layer, an intermediate heating wherein the porous lignocellulose aerogel membrane (LCAM) as layer low conductivity (0.0366 W·m-1·K-1), ensuring less heat loss weather blocking external weather. introduction polydimethylsiloxane (PDMS) increases emissivity (90.4%) atmospheric window also endows it perfect self-cleaning performance. Solar absorptivity (80.1%) dramatically increased by adding only 0.05 wt% carbon nanotubes (CNTs) into polyacrylonitrile. An outdoor test demonstrates HNF temperature drop 7.2 °C compared white cotton environment be high 12.2 warmer than black environment. In addition, possesses excellent moisture permeability, breathability, directional perspiration performances, making promising environments.

Language: Английский

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Wearable Aerogels for Personal Thermal Management and Smart Devices

ACS Nano, Journal Year: 2024, Volume and Issue: 18(14), P. 9798 - 9822

Published: March 29, 2024

Extreme climates have become frequent nowadays, causing increased heat stress in human daily life. Personal thermal management (PTM), a technology that controls the body's microenvironment, has promising strategy to address stress. While effective ordinary environments, traditional high-performance fibers, such as ultrafine, porous, highly thermally conductive, and phase change materials, fall short when dealing with harsh conditions or large temperature fluctuations. Aerogels, third-generation superinsulation material, garnered extensive attention among researchers for their applications building energy conservation, transportation, aerospace, attributed extremely low densities conductivity. aerogels historically faced challenges related weak mechanical strength limited secondary processing capacity, recent advancements witnessed notable progress development of wearable PTM. This underscores potential within serving self-powered smart devices sensors. Review offers timely overview PTM particular focus on wearability suitability. Finally, discussion classifies five types based aerogel function: insulation, heating, cooling, adaptive regulation (involving cooling), utilization devices.

Language: Английский

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A Novel BST@TPU Membrane with Superior UV Durability for Highly Efficient Daytime Radiative Cooling

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(23)

Published: Feb. 12, 2024

Abstract Passive radiative cooling technologies play an integral role in advancing sustainable development. While the potential of polymer‐based materials is increasingly recognized, they often degrade under prolonged ultraviolet (UV) radiation exposure, which undermines both their mechanical and performance. To address this challenge, a coaxial electrospinning method to prepare BST@TPU membrane, with core layer strontium barium titanate nanorods (BST NRs) shell thermoplastic polyurethane (TPU) employed. Capitalizing on UV absorption free radical adsorption properties BST NRs, stability TPU membrane significantly increased. Additionally, inclusion high refractive index NRs compensates for decrease reflectivity caused by absorption. After 216 h continuous 0.7 kW m −2 irradiation, initially exhibits reflectance 97.2%, demonstrated modest decline 92.1%. Its net power maintains 85.78 W from initial 125.21 , extending useful lifetime threefold. This innovation extends promise enhancing efficiency durability materials, contributing solutions across various applications.

Language: Английский

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Biological optics, photonics and bioinspired radiative cooling

Progress in Materials Science, Journal Year: 2024, Volume and Issue: 144, P. 101291 - 101291

Published: April 4, 2024

Language: Английский

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Advancements and challenges in thermoregulating textiles: Smart clothing for enhanced personal thermal management

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 488, P. 151040 - 151040

Published: April 5, 2024

This review addresses the burgeoning field of thermoregulating textiles, highlighting their role in enhancing human thermal comfort and reducing building energy consumption. It delves into development application smart leveraging novel materials methods to regulate heat transfer between skin environment. The systematically explores various strategies, including radiative, conductive responsive mechanisms both active/passive bidirectional textile systems. provides a critical analysis strengths limitations these textiles identifies crucial challenges field. Furthermore, it offers forward-looking insights future research trajectories rapidly evolving domain advanced clothing. roadmap for includes current materials, innovating new solutions ultimately establishing global standards widespread, versatile applications across industries

Language: Английский

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Multifunctional dressings for wound exudate management

Progress in Materials Science, Journal Year: 2024, Volume and Issue: 146, P. 101328 - 101328

Published: June 14, 2024

Language: Английский

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Dual‐Cooling Textile Enables Vertical Heat Dissipation and Sweat Evaporation For Thermal and Moisture Regulation

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(34)

Published: May 7, 2024

Abstract Personal thermal management textiles have garnered a lot of attention because they can efficiently preserve the body's and moisture comfort while saving energy consumption. Nonetheless, conduction cooling‐based textile research is scarce frequently encounters obstacles like overlooking through‐plane heat conduction, management, durability assurance. Here, dual‐cooling (DCT) that combines high‐efficiency dissipation sweat evaporation with 3D conductive network Janus wetting structure demonstrated. The DCT achieves notable in‐plane conductivity (8.57 0.70 W m −1 K ), along practical mechanical qualities (tensile fracture strength 65 MPa), under influence multistage network. Additionally, benefits from its structure, exhibiting unidirectional moisture‐wicking capability (transport index 1081%) fast water performance (0.34 g h ). Rapid are advantageous features for cooling human body in both static dynamic situations. Compared to cotton fabric, lower temperature by up 3.7 °C. This strategy provides fresh perspective on development advanced functional personalized savings buildings.

Language: Английский

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Wettability Gradient-Induced Diode: MXene-Engineered Membrane for Passive-Evaporative Cooling

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: March 21, 2024

Abstract Thermoregulatory textiles, leveraging high-emissivity structural materials, have arisen as a promising candidate for personal cooling management; however, their advancement has been hindered by the underperformed water moisture transportation capacity, which impacts on thermophysiological comfort. Herein, we designed wettability-gradient-induced-diode (WGID) membrane achieving MXene-engineered electrospun technology, could facilitate heat dissipation and moisture-wicking transportation. As result, obtained WGID obtain temperature of 1.5 °C in “dry” state, 7.1 “wet” was ascribed to its high emissivity 96.40% MIR range, superior thermal conductivity 0.3349 W m −1 K (based radiation- conduction-controlled mechanisms), unidirectional property. The proposed design offers an approach meticulously engineering membranes with enhanced transportation, thereby paving way developing more efficient comfortable thermoregulatory textiles high-humidity microenvironment.

Language: Английский

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

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 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.

Language: Английский

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Advanced Bioinspired Personal Thermoregulation Textiles for Outdoor Radiative Cooling

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Radiative cooling textiles designed to reflect incoming sunlight and enhance mid-infrared (MIR) emissivity show great potential for ensuring personal thermal comfort. Thus, these are gaining prominence as a means of combating the heat stress induced by global warming. Nonetheless, integrating radiative effects into scalable textile materials thermoregulation remains formidable challenge. To achieve optimal performance, must exhibit finely tuned optical properties spectral selectivity. In this study, smart was devised drawing inspiration from structure greater flamingo (Phoenicopterus roseus) feathers, which have effective thermoregulatory properties. Specifically, nanoporous nonwoven material fabricated polyacrylonitrile alumina particles integrated with cellulosic cotton knit fabric through an efficient electrospinning hot pressing process produce metafabric (PAC@T) superior wearer PAC@T exhibited average fiber diameter 501.6 nm pore size 857.6 nm, resulting in solar reflectance 95 ± 1.2% MIR 91.8 0.98%. It also demonstrated enhanced water vapor transmission rate (5.5 kg/m2/24 h), evaporation (334 2.2 mg/h), significant leading temperatures 6.1 °C cooler than those achieved traditional knitted textile. offers several distinct advantages, namely efficiency, long-term durability, energy-free operation. addition, it is formed accessible raw via potentially that likely substantial applications industrial generation thermoregulation.

Language: Английский

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