Synthesis of light weight recron fiber-reinforced sodium silicate based silica aerogel blankets at an ambient pressure for thermal protection

Jadhav, Sapna; Makki, Arwa A.; Hajjar, Dina; Sarawade, Pradip B.

doi:10.1007/s10934-022-01231-3

Cited by 13 publications

(4 citation statements)

References 49 publications

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“…The preparation method of the flexible fiber reinforcing aerogel composite is to disperse the fiber evenly into the sols and then gel to obtain the flexible fiber reinforcing aerogel composite. ,, There are many kinds of flexible fibers (such as PI fibers, aramid fibers, glass fibers) that can be incorporated into an aerogel matrix, forming an aerogel–fiber–aerogel structure and achieving the transition from brittleness to flexibility. Flexible fiber reinforced aerogel composites mainly utilize the good interfacial strength between flexible fibers and an aerogel matrix to realize stress transfer, which transfers the stress from the low-strength aerogel matrix to high-strength and high-toughness reinforcing fibers and improves the deformation ability of aerogel composites .…”

Section: Flexible Aerogel Compositesmentioning

confidence: 99%

Flexible Aerogel Materials: A Review on Revolutionary Flexibility Strategies and the Multifunctional Applications

Hou,

Chen,

Chen

et al. 2024

ACS Nano

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The design and preparation of flexible aerogel materials with high deformability and versatility have become an emerging research topic in the aerogel fields, as the brittle nature of traditional aerogels severely affects their safety and reliability in use. Herein, we review the preparation methods and properties of flexible aerogels and summarize the various controlling and design methods of aerogels to overcome the fragility caused by high porosity and nanoporous network structure. The mechanical flexibility of aerogels can be revolutionarily improved by monomer regulation, nanofiber assembly, structural design and controlling, and constructing of aerogel composites, which can greatly broaden the multifunctionality and practical application prospects. The design and construction criterion of aerogel flexibility is summarized: constructing a flexible and deformable microstructure in an aerogel matrix. Besides, the derived multifunctional applications in the fields of flexible thermal insulation (flexible thermal protection at extreme temperatures), flexible wearable electronics (flexible sensors, flexible electrodes, electromagnetic shielding, and wave absorption), and environmental protection (oil/water separation and air filtration) are summarized. Furthermore, the future development prospects and challenges of flexible aerogel materials are also summarized. This review will provide a comprehensive research basis and guidance for the structural design, fabrication methods, and potential applications of flexible aerogels.

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Section: Flexible Aerogel Compositesmentioning

confidence: 99%

Flexible Aerogel Materials: A Review on Revolutionary Flexibility Strategies and the Multifunctional Applications

Hou,

Chen,

Chen

et al. 2024

ACS Nano

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“…Aerogels, with their low thermal conductivity, nanoporous structure, and high specific surface area, occupy an irreplaceable role in thermal management applications such as construction, pipe insulation, and aerospace, making the search for a strategy to improve the mechanical properties of aerogels an urgent issue. − Embedded fibers are an effective strategy for enhancing the mechanical properties of aerogel materials, standing out among methods such as optimizing the internal structure and cross-linking polymers, among others. − Inorganic fibers, particularly glass − and ceramic fibers, − have expanded the application of FACs in extreme temperatures. However, the massive introduction of fibers inevitably results in a high density of the material and a deterioration of the insulation properties. , This becomes a bottleneck that hinders the practical application of the material.…”

Section: Introductionmentioning

confidence: 99%

A Two-Step Route to SiO₂ Nanofiber-Reinforced Aerogel Composites with Lightweight and High Temperature Resistance for Thermal Insulation

Xing

Jiao

et al. 2023

ACS Appl. Nano Mater.

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Fiber reinforcement is an effective method to improve the inherent brittleness of conventional aerogels. However, high-density and complex preparation processes plague fiber-reinforced aerogel composites (FACs). For example, they are usually prepared using costly supercritical drying, freeze-drying, and time-consuming atmospheric drying, limiting the further development in applications and technologies of the material. Herein, a straightforward route to FACs is proposed. Namely, electrostatically spun nanofibers are used as reinforcement materials for aerogels. The nanofiber composite silica gel precursors are produced using chemical swelling and sol–gel techniques. Direct calcination is then used to prepare FACs with distinct nanoporous structures. As a result, FACs have a thermal conductivity as low as 0.029 W m–1 K–1 at room temperature, a high porosity of up to 99.55%, and excellent temperature resistance, maintaining a stable porous structure even at 1400 °C. Therefore, FACs have greater potential for thermal insulation applications. The route described in this study will contribute to the opening of a pathway for the simple preparation of FACs with ultralow density and high temperature resistance, thereby promoting the application and development of nanofiber-reinforced aerogel materials.

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“…One way is to optimize the micro/macro morphology of the aerogel through preparation [ 13 ]. Another method is to add materials to form an enhanced composite structure [ 14 ]. Additionally, it has been demonstrated that spherical aerogels have good fluidity, uniform stress, and strain, which can improve the elastic–plastic deformability and mechanical properties [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Spherical Attapulgite/Silica Aerogels Fabricated via Different Drying Methods with Excellent Adsorption Performance

et al. 2023

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Dye wastewater has caused great harm to the environment, which is an urgent problem to be solved. As typical three-dimensional porous materials, aerogels have attracted great interest in dye wastewater treatment. In this work, spherical attapulgite/silica (ATP/SiO2) gels were initially prepared by easily scalable sol-gel dripping methods and then dried to aerogels with three drying techniques, namely, supercritical CO2 drying (SCD), freeze-drying (FD), and ambient pressure drying (APD). The effect of the drying techniques and heat-treated temperature on the physical characteristic, morphological properties, microstructure, and chemical structure of the spherical ATP/SiO2 aerogels were investigated. The macroscopic morphology of the spherical ATP/SiO2 aerogels was homogeneous and integrated without local cracking. The average pore diameter and specific surface area of the spherical ATP/SiO2 aerogels prepared by the three drying techniques were in the range of 6.8–8.6 nm and 218.5–267.4 m2/g, respectively. The heat treatment temperature had a significant effect on the pore structure and the wetting properties of the aerogels. The 600 °C heat-treated aerogels were subjected to adsorption tests in methylene blue (MB) solution (60 mg/g, 100 mL), which exhibited a great adsorption capacity of 102.50 mg/g. Therefore, the resulting spherical ATP/SiO2 aerogels possessed multipath preparation and exhibited an efficient adsorption performance, with the potential to be applied as an adsorbent for dye wastewater.

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Synthesis of light weight recron fiber-reinforced sodium silicate based silica aerogel blankets at an ambient pressure for thermal protection

Cited by 13 publications

References 49 publications

Flexible Aerogel Materials: A Review on Revolutionary Flexibility Strategies and the Multifunctional Applications

Flexible Aerogel Materials: A Review on Revolutionary Flexibility Strategies and the Multifunctional Applications

A Two-Step Route to SiO₂ Nanofiber-Reinforced Aerogel Composites with Lightweight and High Temperature Resistance for Thermal Insulation

Spherical Attapulgite/Silica Aerogels Fabricated via Different Drying Methods with Excellent Adsorption Performance

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Synthesis of light weight recron fiber-reinforced sodium silicate based silica aerogel blankets at an ambient pressure for thermal protection

Cited by 13 publications

References 49 publications

Flexible Aerogel Materials: A Review on Revolutionary Flexibility Strategies and the Multifunctional Applications

Flexible Aerogel Materials: A Review on Revolutionary Flexibility Strategies and the Multifunctional Applications

A Two-Step Route to SiO2 Nanofiber-Reinforced Aerogel Composites with Lightweight and High Temperature Resistance for Thermal Insulation

Spherical Attapulgite/Silica Aerogels Fabricated via Different Drying Methods with Excellent Adsorption Performance

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A Two-Step Route to SiO₂ Nanofiber-Reinforced Aerogel Composites with Lightweight and High Temperature Resistance for Thermal Insulation