Flexible Al2O3/ZrO2 nanofibrous membranes for thermal insulation

Li, Shouzhen; Wu, Fan; Zhang, Xuan; Han, Guangting; Si, Yang; Yu, Jianyong; Ding, Bin

doi:10.1039/d1ce01512e

Cited by 9 publications

(3 citation statements)

References 52 publications

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“…Recently, Li and co-workers [70] prepared Al 2 O 3 /ZrO 2 fibrous membrane through sol-gel electrospinning approach (Figure 5c). The resulting membranes display favorable flexibility, dramatic fire and temperature resistance, as well as low thermal conductivity of 0.03166 W•m −1 •K −1 at room temperature (Figure 5d-f).…”

Section: Al 2 O 3 Fibermentioning

confidence: 99%

Advancements in Thermal Insulation through Ceramic Micro-Nanofiber Materials

Wang,

Fu,

et al. 2024

Molecules

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Ceramic fibers have the advantages of high temperature resistance, light weight, favorable chemical stability and superior mechanical vibration resistance, which make them widely used in aerospace, energy, metallurgy, construction, personal protection and other thermal protection fields. Further refinement of the diameter of conventional ceramic fibers to microns or nanometers could further improve their thermal insulation performance and realize the transition from brittleness to flexibility. Processing traditional two-dimensional (2D) ceramic fiber membranes into three-dimensional (3D) ceramic fiber aerogels could further increase porosity, reduce bulk density, and reduce solid heat conduction, thereby improving thermal insulation performance and expanding application areas. Here, a comprehensive review of the newly emerging 2D ceramic micro-nanofiber membranes and 3D ceramic micro-nanofiber aerogels is demonstrated, starting from the presentation of the thermal insulation mechanism of ceramic fibers, followed by the summary of 2D ceramic micro-nanofiber membranes according to different types, and then the generalization of the construction strategies for 3D ceramic micro-nanofiber aerogels. Finally, the current challenges, possible solutions, and future prospects of ceramic micro-nanofiber materials are comprehensively discussed. We anticipate that this review could provide some valuable insights for the future development of ceramic micro-nanofiber materials for high temperature thermal insulation.

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Section: Al 2 O 3 Fibermentioning

confidence: 99%

Advancements in Thermal Insulation through Ceramic Micro-Nanofiber Materials

Wang,

Fu,

et al. 2024

Molecules

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“…A typical ZrO 2 spinning solution consists of the following four sections: polymer template, zirconium salt, crystalline stabilizer, and solvent. The zirconium salt contains ZrOCl 2 •8H 2 O [74][75][76], zirconium acetate [77][78][79], zirconium n-propoxide [80][81][82], and zirconium alkali carbonate [83,84]. The addition of polymer templates can enhance the spinnability of the solution and optimize the morphology and structure of the ZrO 2 precursor NFs.…”

Section: Electrospinningmentioning

confidence: 99%

Recent advances in ZrO2 nanofibers: From structural design to emerging applications

Wang

Yin

et al. 2022

Sci. China Mater.

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One-dimensional (1D) zirconium dioxide nanofibers (ZrO 2 NFs), as an important inorganic material, have attracted significant attention because of their unique structural characteristics, outstanding chemical/thermal stability, and excellent optical/electronic properties. The biotemplate method, phase inversion method, centrifugal spinning, and electrospinning are facile and highly versatile approaches for the synthesis of ZrO 2 NFs, which have great potential in many emerging applications, such as thermal insulation, air filtration, water purification, catalyst supports, dye-sensitized solar batteries, and lithium-ion batteries. In this review, strategies for synthesizing ZrO 2 NFs with various structures, such as porous, hollow, layered, and even 3D selfassembled structures, are described and analyzed in detail. Recent revolutionary progress in mitigating the brittle nature of ceramics and constructing flexible ZrO 2 NFs, as well as their deformation mechanisms, is also discussed. Then, achievements concerning the application fields of ZrO 2 NFs in thermal insulation, environmental remediation, catalysis, and batteries are presented. Finally, we provide a comprehensive summary of the critical challenges and future perspectives on ZrO 2 NFs. This review is envisioned to guide future research on novel ZrO 2 NFs for emerging applications.

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“…[ 4 ] NASA pioneered the use of aerogels as efficient insulating materials on several Mars rovers and spacecraft parts, such as the insulation assembly of Rover Mars batteries, the outer surface of vehicle decelerators, [ 5 ] etc., and is also advancing their application in extra‐vehicular insulating suits. [ 6 ] Oxide ceramic aerogels have currently been the most rapidly developed in high‐temperature insulation; however, due to the restrictions of crystallization‐induced pulverization, large thermal expansion, and relatively low operating temperatures, for example, SiO 2 (650 °C), [ 7 ] ZrO 2 (1100 °C), [ 8 ] Al 2 O 3 (1300 °C), [ 9 ] and mullite (1400 °C), these aerogels and their composites suffer from severe strength deterioration and catastrophic structural failure during significant temperature gradient changes or long‐term high‐temperature exposure. [ 10 ] Conversely, carbon aerogels (CAs) maintain their mesoporous structure despite heat treatment over 2500 °C under a vacuum or inert atmosphere, showing favorable thermal stability at ultra‐high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Superelastic Carbon Aerogels: An Emerging Material for Advanced Thermal Protection in Extreme Environments

Chang

Cheng

Zhang

et al. 2023

Adv Funct Materials

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speed airflow scouring. Accordingly, the thermal protection system (TPS) must be applied on their surface to cope with the integrated heat load accumulated during flight. [2] The lightweight nature of TPS is critical in addressing the criteria for ultralong-range combat military weapons with high sound speeds and load capacities while considering the production cost in check. Kistler of Stanford University first proposed the concept of aerogel in 1931, [3] which was fabricated by exchanging the liquid in a wet gel by gas whilst guaranteeing that the internal structure did not collapse, becoming one of the lightest solid materials known to date. The abundance of internal nanoscale pore size and highly tortuous pore structure determine aerogel's excellent thermally insulation performance, with the thermal conductivity as low as 0.005 W m −1 K −1 . [4] NASA pioneered the use of aerogels as efficient insulating materials on several Mars rovers and spacecraft parts, such as the insulation assembly of Rover Mars batteries, the outer surface of vehicle decelerators, [5] etc., and is also advancing their application in extra-vehicular insulating suits. [6] Oxide ceramic aerogels have currently been the most rapidly developed in high-temperature insulation; however, due to the restrictions of crystallization-induced pulverization, large thermal expansion, and relatively low operating temperatures, for example, SiO 2 (650 °C), [7] ZrO 2 (1100 °C), [8] Al 2 O 3 (1300 °C), [9] and mullite (1400 °C), these aerogels and their composites suffer from severe strength deterioration and catastrophic structural failure during significant temperature gradient changes or long-term high-temperature exposure. [10] Conversely, carbon aerogels (CAs) maintain their mesoporous structure despite heat treatment over 2500 °C under a vacuum or inert atmosphere, showing favorable thermal stability at ultra-high temperatures. [11] In addition, they also have a much higher specific extinction coefficient (190 m 2 kg −1 ) than others (e.g., SiO 2 aerogel with 20 m 2 kg −1 ), which leads to lower radiative thermal conductivities. [12] Therefore, CAs are anticipated to be up-and-coming candidates for the TPS of hypersonic vehicles in conditions of severe heat flow density and ultra-high temperatures.The terms of CAs initially referred to carbonaceous substances that exist as 3D monoliths macroscopically and

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Flexible Al₂O₃/ZrO₂ nanofibrous membranes for thermal insulation

Abstract: Developing ceramic materials for thermal insulation is vital for various applications. However, ceramics have been considered intrinsically rigid and brittle due to the limited crystallographic slips and structure collapse during...

Cited by 9 publications

References 52 publications

Advancements in Thermal Insulation through Ceramic Micro-Nanofiber Materials

Advancements in Thermal Insulation through Ceramic Micro-Nanofiber Materials

Recent advances in ZrO2 nanofibers: From structural design to emerging applications

Superelastic Carbon Aerogels: An Emerging Material for Advanced Thermal Protection in Extreme Environments

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