Published: Jan. 1, 2024
Language: Английский
Laser & Photonics Review, Journal Year: 2024, Volume and Issue: unknown
Published: July 15, 2024
Abstract In modern war of “find and destroy,” hiding the target is one essential means to improve battlefield survivability personnel, weapons, equipment. Infrared stealth technology started emerge when in visible light band could no longer meet protection requirements. With rapid development infrared detection technology, materials are gradually diversified. At present, focuses only on low emissivity, but from multiple perspectives achieve stealth, such as tunability optical properties, good thermal management, multi‐spectral compatibility stealth. same time, shifted passive active, emphasizing dynamic integration environment. This review summarizes research progress, development, application materials. Camouflage dye coating classified traditional technologies, however new developments novel processes literature can be constantly retrieved over years. addition dyeing/coating this also highlights advanced insulation materials, phase change electrochromic metamaterials, bionic Outlines technologies mainly focused those published recent Challenges prospects for future presented at end review.
Language: Английский
Citations
11
Small, Journal Year: 2025, Volume and Issue: unknown
Published: March 6, 2025
Hybridization by multi-components in an aerogel is efficient way to make nanoporous robust, high-temperature stable and multifunctional. While the formation of network a liquid-solid phase separation, solid-solid separation between multi-component likely be triggered enthalpy penalty, which would undermine synergistically effects. Here, this work presents copolymerized precursor that simultaneously incorporates two metals one precursor, efficiently suppress potential distinct components during sol-gel reaction. The form atomic-level cross-links are inherited into aerogel. difference hydrolysis reaction rates slows down gelation time inhibits separation. As proof-of-concept, polyacetylacetone yttrium-zirconium (PAYZ) derived Y2O3 stabilized ZrO2 (YSZ) demonstrates homogeneous chemical structure than those synthesized metal-salt precursor; additionally, YSZ can retain nanopores up 1300 °C SBET 17 cm2·g-1 after assessment low bulk shrinkage, outperforming metal-salts aerogels reported so far. only 1 mm thick insulate heating source temperature 860 about 407 °C, indicating remarkable thermal insulation performance. Owing uniform incorporation Y lattices, shows excellent ultraviolet (UV) shielding performances. hybrid synthesis provides strategy explore new aerogels, have better performance wider applications.
Language: Английский
Citations
1
Solar Energy, Journal Year: 2024, Volume and Issue: 279, P. 112840 - 112840
Published: Aug. 7, 2024
Language: Английский
Citations
8
ACS Nano, Journal Year: 2024, Volume and Issue: 18(42), P. 29273 - 29281
Published: Oct. 8, 2024
Barium aluminate (BAO) ceramics are highly sought after as a kind of high-temperature refractory material due to their exceptional thermal stability in both vacuum and oxygen atmospheres, but inherent brittleness results rapid hardening, imposing negative impact on the overall construction performance. Here, we report strategy synthesize flexible BAO nanofibers with needle-like structure through confined-gelation electrospinning followed by situ mineralization. The confined gelation among colloidal particles promotes formation precursor high continuity large aspect ratio. resulting nanofiber membranes bendable, stretchable, can even be woven, exhibiting softness (12 mN) that is lower than tissue paper (27 mN). Additionally, they capable withstanding hundreds thousands continuous buckling bending at 50% deformation without tearing. More importantly, low emissivity ensures excellent insulation 1300 °C while preserving structural integrity performance stability. In this sense, our easily scaled up produce yet tough oxide ceramic for wider range applications.
Language: Английский
Citations
4
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 9, 2024
Abstract Elastic ceramic aerogels are exceptionally suitable for thermal insulating applications, but lacking multi‐mechanical synergistic high strength remains a deficiency. Inspired by the robust protective shells of mollusks in nature, which feature distinct hierarchical ordered structures, exhibiting strong and tough mechanical properties, system construction structural governing strategy is proposed to allow nanostructure assemble flexible aerogels. Through design multi‐arched structure configurated binary‐soldering‐assemble interfacial topology interlocking, concentrated stress effectively discrete. This biomimetic enables effective dissipation energy, resulting with exemplary compressive resilience, bendability, tensile resistance, their exceeding that other nanofibrous up tenfold. Additionally, also show remarkable resistance from −196 1100 °C superior insulation capabilities (39.72 mW m −1 K ), making them more applications.
Language: Английский
Citations
4
ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 20, 2025
Language: Английский
Citations
0
Journal of Building Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112149 - 112149
Published: Feb. 1, 2025
Language: Английский
Citations
0
Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179525 - 179525
Published: March 1, 2025
Language: Английский
Citations
0
ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 16, 2025
Aerogels are regarded as the next generation of thermal insulators; however, conventional aerogels suffer from issues such brittleness, low moisture resistance, and a complex production process. Subnanowires (SNWs) emerging materials known for their exceptional flexibility, toughness, intrinsic hydrophobicity, gelling capabilities, making them ideal building blocks flexible, tough, hydrophobic, thermally insulating aerogels. Herein, we present simple scalable strategy to construct SNW by freeze-drying hydroxyapatite (HAP) dispersions in cyclohexane. The resulting consist three-dimensional porous flakes composed thin layers bundles. They exhibit numerous outstanding properties, including ultralow density (12.33 mg·cm–3), high porosity (99.15%), remarkable flexibility excellent insulation properties (27.53 mW·m–1·K–1). Because HAP SNWs cores capped with hydrocarbon chains, demonstrate hydrophobicity (138° water contact angle) superior stability compared polymer foams. Furthermore, can effectively shield against infrared radiation due conductivity. This work suggests that serve intrinsically hydrophobic aerogels, paving way future applications insulation.
Language: Английский
Citations
0
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 28, 2025
Abstract Breaking the thermal, mechanical and lightweight performance limit of aerogels has pivotal significance on thermal protection, new energy utilization, high‐temperature catalysis, structural engineering, physics, but is severely limited by serious discrete characteristics between grain boundary nano‐units interfaces. Herein, a thermodynamically driven surface reaction confined crystallization process reported to synthesize centimeter‐scale supercontinuous ZrO 2 nanolayer ‐SiO fiber aerogel surface, which significantly improved its properties with density almost unchanged (≈26 mg cm −3 ). Systematic structure analysis confirms that layer achieves close connection grains fibers through Zr─O─Si bonds. The as‐prepared exhibits record‐breaking specific strength (≈84615 N m kg −1 , can support up ≈227 272 times mass) dynamic impact resistance (withstanding impacts 500 mass 200 cycling stability at 80% strain). Besides, temperature also been greatly optimized (400 °C enhancement, 1500 °C). This work will provide perspective for exploring limits lightweight, high strength, solid materials.
Language: Английский
Citations
0