Biomimetic, knittable aerogel fiber for thermal insulation textile

Science, Journal Year: 2023, Volume and Issue: 382(6677), P. 1379 - 1383

Published: Dec. 21, 2023

Aerogels have been considered as an ideal material for thermal insulation. Unfortunately, their application in textiles is greatly limited by fragility and poor processability. We overcame these issues encapsulating the aerogel fiber with a stretchable layer, mimicking core-shell structure of polar bear hair. Despite its high internal porosity over 90%, our up to 1000% strain, which improved compared that traditional fibers (~2% strain). In addition washability dyeability, mechanically robust, retaining stable insulation property after 10,000 stretching cycles (100% A sweater knitted was only one-fifth thick down, similar performance. Our strategy this provides rich possibilities developing multifunctional textiles.

Language: Английский

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Micro–Nano Water Film Enabled High-Performance Interfacial Solar Evaporation

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Sept. 22, 2023

Interfacial solar evaporation holds great promise to address the freshwater shortage. However, most interfacial evaporators are always filled with water throughout process, thus bringing unavoidable heat loss. Herein, we propose a novel structure based on micro-nano film, which demonstrates significantly improved performance, as experimentally verified by polypyrrole- and polydopamine-coated polydimethylsiloxane sponge. The 2D evaporator as-prepared sponge realizes an enhanced rate of 2.18 kg m-2 h-1 under 1 sun fine-tuning film. Then, homemade device condensation function is engineered for outdoor clean production. Throughout continuous test 40 days, this high production (WPR) 15.9-19.4 kW-1 m-2. Based outcomes, further establish multi-objective model assess global WPR. It predicted that m2 can produce at 7.8 per day, could meet daily drinking needs 3 people. Finally, technology greatly alleviate current energy crisis through large-scale applications.

Language: Английский

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Constructing Scalable Membrane with Tunable Wettability by Electrolysis‐Induced Interface pH for Oil–Water Separation

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(50)

Published: Aug. 9, 2023

Abstract The tunable wettability by pH‐stimulus has great potential in liquid adhesion, transport, collection, and separation due to its rapid response wide control range. However, achieving pH‐regulated on the selected region of material without acid–base contamination presents a distinct challenge for existing methods. Here, scalable conductive network membrane is prepared with switchable regulating interfacial pH. generation diffusion pH are regulated through confinement electrolysis process, which adapted both spatial arrangements electrical potential. By (>13), can change from superhydrophobicity (Water contact angle = 150°) superhydrophilicity/underwater superoleophobicity 0°) additional reagent 30 s under 15 V. Based precise controllability, efficiently realize on‐demand oil–water (>99%) situ extraction‐back extraction. programable free contamination, may have broad practical application intelligent fluid‐related systems.

Language: Английский

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Solar‐Powered Interfacial Evaporation and Deicing Based on a 3D‐Printed Multiscale Hierarchical Design

Small, Journal Year: 2023, Volume and Issue: 19(33)

Published: April 22, 2023

Abstract Solar‐powered interfacial heating has emerged as a sustainable technology for hybrid applications with minimal carbon footprints. Aerogels, hydrogels, and sponges/foams are the main building blocks state‐of‐the‐art photothermal materials. However, these conventional three‐dimensional (3D) structures related fabrication technologies intrinsically fail to maximize important performance‐enhancing strategies this still faces several performance roadblocks. Herein, monolithic, self‐standing, durable aerogel matrices developed based on composite inks ink‐extrusion 3D printing, delivering all‐in‐one steam generators (SGs). Rapid prototyping of multiscale hierarchical synergistically reduce energy demand evaporation, expand actual evaporation areas, generate massive environmental input, improve mass flows. Under 1 sun, high water rates 3.74 kg m −2 h −1 in calm air 25.3 at gentle breeze 2 s achieved, ranking among best‐performing solar‐powered SGs. 3D‐printed microchannels hydrophobic modification deliver an icephobic surface aerogels, leading self‐propelled rapid removal ice droplets. This work shines light rational materials, not merely breaking through constraints clean production, but also discovering new functions deicing.

Language: Английский

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Ionization Engineering of Hydrogels Enables Highly Efficient Salt-Impeded Solar Evaporation and Night-Time Electricity Harvesting

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 16(1)

Published: Nov. 6, 2023

Interfacial solar evaporation holds immense potential for brine desalination with low carbon footprints and high energy utilization. Hydrogels, as a tunable material platform from the molecular level to macroscopic scale, have been considered most promising candidate evaporation. However, simultaneous achievement of efficiency satisfactory tolerance salt ions in remains challenging scientific bottleneck, restricting widespread application. Herein, we report ionization engineering, which endows polymer chains hydrogels electronegativity impeding activating water molecules, fundamentally overcoming hydrogel salt-impeded challenge dramatically expediting evaporating brine. The sodium dodecyl benzene sulfonate-modified black is chosen absorbers. reaches ground-breaking rate 2.9 kg m

Language: Английский

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Chitosan/silica hybrid aerogels with synergistic capability for superior hydrophobicity and mechanical robustness

Carbohydrate Polymers, Journal Year: 2023, Volume and Issue: 320, P. 121245 - 121245

Published: Aug. 1, 2023

Language: Английский

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Photothermal fabrics for solar-driven seawater desalination

Progress in Materials Science, Journal Year: 2024, Volume and Issue: unknown, P. 101407 - 101407

Published: Nov. 1, 2024

Language: Английский

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Solar-driven interfacial evaporation: materials design and device assembly

Energy Materials, Journal Year: 2024, Volume and Issue: 4(2)

Published: March 15, 2024

Solar-driven interfacial evaporation (SIE) is an emerging research topic that gaining attention due to its potential in addressing global water scarcity issues. This review provides a comprehensive overview of base materials, recent innovations photothermal materials and the design evaporators for effective desalination purification. The development SIE meticulously discussed, providing deep understanding key performance indicators state-of-the-art materials. Additionally, this examines novel strategies have been reported literature enhancing efficiency scalability systems. These involve using exploring innovative device configurations. Finally, we discuss existing challenges future directions, emphasizing contributing sustainable future.

Language: Английский

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Recent Advances in High‐Rate Solar‐Driven Interfacial Evaporation

Advanced Science, Journal Year: 2024, Volume and Issue: 11(26)

Published: May 5, 2024

Abstract Recent advances in solar‐driven interfacial evaporation (SDIE) have led to high rates that open promising avenues for practical utilization freshwater production and industrial application pollutant nutrient concentration, resource recovery. Breakthroughs overcoming the theoretical limitation of 2D allowed developing systems with rates. This study presents a comprehensive review various evaporator designs achieved pure beyond 4 kg m −2 h −1 , including structural material allowing rapid evaporation, passive 3D designs, coupled alternative energy sources wind joule heating. The operational mechanisms each design are outlined together discussion on current benefits areas improvement. overarching challenges encountered by SDIE concerning feasibility direct integration into contemporary settings assessed, issues relating sustaining elevated under diverse environmental conditions addressed.

Language: Английский

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MXene Sediment-Based Poly(vinyl alcohol)/Sodium Alginate Aerogel Evaporator with Vertically Aligned Channels for Highly Efficient Solar Steam Generation

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

Published: June 17, 2024

Solar-driven interfacial evaporation from seawater is considered an effective way to alleviate the emerging freshwater crisis because of its green and environmentally friendly characteristics. However, developing evaporator with high efficiency, stability, salt resistance remains a key challenge. MXene, internal photothermal conversion efficiency 100%, has received tremendous research interest as material. process prepare MXene monolayer inefficient generates large amount "waste" sediments (MS). Here, selected material, three-dimensional sediments/poly(vinyl alcohol)/sodium alginate aerogel vertically aligned pores by directional freezing method innovatively designed. The vertical porous structure enables improve water transport, light capture, rate. Cotton swabs polypropylene are used channel support, respectively, thus fabricating self-floating evaporator. exhibits rate 3.6 kg m

Language: Английский

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