Multifunctional nanofiber aerogels for environmental applications: oil water separation, thermal insulation, fire proofing

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115541 - 115541

Published: Jan. 1, 2025

Language: Английский

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Diatomaceous Earth/Polyvinylidene Fluoride Piezoelectric Composite Foam for Enhancing Sound Absorption Performance

Fibers and Polymers, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Language: Английский

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Ambiently Dried Aerogel-Foam Composites with Gradient Pore Structure for Enhanced Sound Absorption

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

Published: March 11, 2025

Silica-based aerogels are widely regarded as promising sound-absorbing materials due to their low density and high specific surface area. However, hard small pores hinder sound wave penetration, resulting in a relatively poor absorption performance. To overcome this limitation, our study employs melamine foam (MF) scaffold construct gradient aerogel composite acoustic absorber. This innovative design significantly leads average (31.3–117.4 mg/cm3) large up 13.7 mg/cm4 (approximately 2.7 times difference compared with the lowest density), its properties greatly improved, achieving an coefficient of 87% over entire frequency band 95% above 2000 Hz for 30 mm samples. In addition, best noise reduction can reach 0.59. For demonstration, simulations further reveal role pore size enhancing absorption. The skeleton facilitate coupling waves into structure, while effectively block transmission, providing additional pathways energy dissipation. Moreover, incorporation enhances foam's mechanical properties. terms thermal insulation, presence markedly improves insulating not only expands potential applications insulation but also provides novel approach development advanced materials.

Language: Английский

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Load-Bearing Organogels: Hierarchical Anisotropic Composite Structure for High Mechanical Toughness and Antifatigue-Fracture Capability under Extreme Conditions

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Gels with excellent mechanical properties and antifatigue-fracture capability are attractive materials for load-bearing applications; however, at extreme temperatures, they still suffer from catastrophic failure caused by freezing- or dehydration-induced crack propagation. Here, we present a series of hierarchical anisotropic composite organogels that strong yet tough over wide temperature range (-30 to 60 °C) through the combination strategies freezing-casting, annealing, solvent exchange polyols. Such hybrid design endows gels structures tolerance thus guaranteeing efficient energy dissipation propagation resistance under both ambient harsh conditions. For instance, organogel obtained via glycerol exhibited high strength (22.6 MPa), toughness (198.0 MJ/m3), fatigue threshold (6.92 kJ/m2), particularly, superhigh fracture (665.7 which is even higher than anhydrous elastomers, metals, alloys. Importantly, these values were further boosted such as thresholds 8.01 9.77 kJ/m2 -30 °C, respectively. This work offers an strategy fabricating gel reliable applications

Language: Английский

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Stimuli-responsive hydrogels composed of modified cellulose nanocrystal and gelatin with oriented channels for guiding axonal myelination

Carbohydrate Polymers, Journal Year: 2025, Volume and Issue: 356, P. 123402 - 123402

Published: Feb. 16, 2025

Language: Английский

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