Self-assembly of ultralight and compressible inorganic sponges with hierarchical porosity by electrospinning

Wang, Yun; Huang, Haibo; Zhao, Yue; Feng, Zhongmin; Fan, Hong-Tao; Sun, Ting; Yan, Xu

doi:10.1016/j.ceramint.2019.09.031

Cited by 21 publications

(10 citation statements)

References 52 publications

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“…6d). First, the multichannel pores lengthen the path of solid heat transfer and restrict the gaseous heat conduction, which lead to the decline of λs and λg [18,19]. Second, the multichannel structure makes the IR radiation multiple reflect and absorb, resulting in the lowering of λr [21].…”

Section: Thermal Insulation Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Compared with carbon fibers, the thermal conductivity of the porous carbon fibers with nanoscale structure decreased 98 % to 0.15 W m -1 •K -1 at ambient temperature. Wang et al [19] reported SiO2-TiO2 and SiO2-ZrO2 fibers with highly porous structure. The numerous pores within the fiber could effectively reduce the solid heat transfer, confine the gaseous heat transfer and enhance the reflection of IR.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, it has been found that constructing porous structure is an effective way to reduce the thermal conductivity of fibers [18][19][20][21][22]. On the one hand, the porous structure will lengthen the path of heat transfer and hinder the gaseous heat conduction, leading to a low solid and gas heat transfer [18,19]. On the other hand, the multiscale porous structure contributes to enhance multiple reflection-absorption of the IR radiation, which can decrease radiation heat transfer [16,20,21].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the SiO2-TiO2 and SiO2-ZrO2 porous fibers had great potential to be used in the thermal insulation fields. However, despite these advances, ceramic fibers with highly porous structure usually suffered from the poor mechanical properties, which was mainly due to the brittle nature of ceramics and numerous pore defects [14,18,19]. Therefore, it was still a long-standing challenge in designing porous structured ceramic fibers with both high flexibility and thermal insulation performance.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Multichannel and Super-flexible SiZrOC Ultrafine Fibers for High Temperature Thermal Insulation

Zhang

Tian

Wang

et al. 2021

Preprint

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Light but robust porous ceramic fibers with combined properties of super flexibility, excellent thermal stability and thermal insulation performance are attractive for use in extreme conditions, especially in the field of aerospace. However, the practical application of traditional porous ceramic fibers are usually limited by their brittle nature and poor mechanical properties. Herein, we designed a multichannel SiZrOC ultrafine fiber (MSUF) composed of ZrO2, SiOxCy and free carbon phases by electrospinning technique. The resulting fibers exhibited integrated properties of excellent fire resistance, high temperature stability, thermal shock resistance and temperature-invariant flexibility. More importantly, the fancy multichannel structure and components of the fiber provides it with outstanding thermal insulation performance with low thermal conductivity (0.041 W m-1·K-1 at 25 ºC and 0.141 W m-1·K-1 at 1000 ºC). The successful fabrication of such flexible porous MSUFs may provide a new approach to design high performance thermal insulators for high temperature thermal insulation.

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Section: Thermal Insulation Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multichannel and Super-flexible SiZrOC Ultrafine Fibers for High Temperature Thermal Insulation

Zhang

Tian

Wang

et al. 2021

Preprint

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Ceramic Meta‐Aerogel with Thermal Superinsulation up to 1700 °C Constructed by Self‐Crosslinked Nanofibrous Network via Reaction Electrospinning

Xu,

Liu,

Xin

et al. 2024

Advanced Materials

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Thermal insulation under extreme conditions requires the materials to be capable of withstanding complex thermo‐mechanical stress, significant gradient temperature transition, and high‐frequency thermal shock. The excellent structural and functional properties of ceramic aerogels make them attractive for thermal insulation. However, in extremely high‐temperature environments (above 1500 °C), they typically exhibit limited insulation capacity and thermo‐mechanical stability, which may lead to catastrophic accidents, and this problem has never been effectively addressed. Here, we design a novel ceramic meta‐aerogel constructed from a crosslinked nanofiber network using a reaction electrospinning strategy, which ensures excellent thermo‐mechanical stability and superinsulation under extreme conditions. The ceramic meta‐aerogel has an ultralow thermal conductivity of 0.027 W m–1 k–1, and the cold surface temperature is only 303 °C in a 1700 °C high‐temperature environment. After undergoing a significant gradient temperature transition from liquid nitrogen to 1700 °C flame burning, the ceramic meta‐aerogel can still withstand thousands of shears, flexures, compressions, and other complex forms of mechanical action without structural collapse. This work provides new insight into developing ceramic aerogels that can be used for a long period in extremely high‐temperature environments.This article is protected by copyright. All rights reserved

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In situ Synthesis of Biomimetic Silica Nanofibrous Aerogels with Temperature‐Invariant Superelasticity over One Million Compressions

et al. 2020

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Resilient and compressible three‐dimensional nanomaterials comprising polymers, carbon, and metals have been prepared in diverse forms. However, the creation of thermostable elastic ceramic aerogels remains an enormous challenge. We demonstrate an in situ synthesis strategy to develop biomimetic silica nanofibrous (SNF) aerogels with superelasticity by integrating flexible electrospun silica nanofibers and rubber‐like Si−O−Si bonding networks. The stable bonding structure among nanofibers is in situ constructed along with a fibrous freeze‐shaping process. The resultant SNF aerogels exhibit integrated properties of ultralow density (>0.25 mg cm−3), temperature‐invariant superelasticity up to 1100 °C, and robust fatigue resistance over one million compressions. The ceramic nature also endows the aerogels with fire resistance and ultralow thermal conductivity. The successful synthesis of the SNF aerogels opens new pathways for the design of superelastic ceramic aerogels in a structurally adaptive and scalable form.

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Self-assembly of ultralight and compressible inorganic sponges with hierarchical porosity by electrospinning

Cited by 21 publications

References 52 publications

Multichannel and Super-flexible SiZrOC Ultrafine Fibers for High Temperature Thermal Insulation

Multichannel and Super-flexible SiZrOC Ultrafine Fibers for High Temperature Thermal Insulation

Ceramic Meta‐Aerogel with Thermal Superinsulation up to 1700 °C Constructed by Self‐Crosslinked Nanofibrous Network via Reaction Electrospinning

In situ Synthesis of Biomimetic Silica Nanofibrous Aerogels with Temperature‐Invariant Superelasticity over One Million Compressions

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Self-assembly of ultralight and compressible inorganic sponges with hierarchical porosity by electrospinning

Cited by 21 publications

References 52 publications

Multichannel and Super-flexible SiZrOC&nbsp;Ultrafine Fibers for High Temperature Thermal Insulation

Multichannel and Super-flexible SiZrOC&nbsp;Ultrafine Fibers for High Temperature Thermal Insulation

Ceramic Meta‐Aerogel with Thermal Superinsulation up to 1700 °C Constructed by Self‐Crosslinked Nanofibrous Network via Reaction Electrospinning

In situ Synthesis of Biomimetic Silica Nanofibrous Aerogels with Temperature‐Invariant Superelasticity over One Million Compressions

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Product

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Multichannel and Super-flexible SiZrOC Ultrafine Fibers for High Temperature Thermal Insulation

Multichannel and Super-flexible SiZrOC Ultrafine Fibers for High Temperature Thermal Insulation