Porous carbon-bonded carbon fiber composites impregnated with SiO2-Al2O3 aerogel with enhanced thermal insulation and mechanical properties

Li, Huimin; Chen, Yanfei; Wang, Panding; Jin, Xiaochao; Ma, Yongbin; Wang, Wen; Yang, Yusen; Fang, Daining

doi:10.1016/j.ceramint.2017.11.064

Cited by 52 publications

(19 citation statements)

References 14 publications

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“…This is due to the strong interaction of PI and CF after carbonization and the three-dimensional network structure of CF in the matrix, the final modulus of carbon aerogel just slightly decreased; meanwhile, the density of aerogels slightly decreased during the weight loss process. Porous carbon-bonded carbon fiber (CBCF) composites have been used as a high-temperature capability, low thermal conductivity, and low-cost materials for decades . However, the improvement of the mechanical property is often at the expense of its adiabatic performance and lightweight. − Compared with CBCF, PI/CF carbon aerogels can also achieve a balance between thermal conductivity, mechanical property, and lightweight.…”

Section: Resultsmentioning

confidence: 99%

“…Porous carbon-bonded carbon fiber (CBCF) composites have been used as a high-temperature capability, low thermal conductivity, and low-cost materials for decades . However, the improvement of the mechanical property is often at the expense of its adiabatic performance and lightweight. − Compared with CBCF, PI/CF carbon aerogels can also achieve a balance between thermal conductivity, mechanical property, and lightweight. Therefore, PI/CF carbon aerogels may have potential applications in aerospace, nuclear facilities, and other fields with requirements of both high-temperature insulation and radiation resistance.…”

Section: Resultsmentioning

confidence: 99%

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Fabrication and Properties of Polyimide/Carbon Fiber Aerogel and the Derivative Carbon Aerogel

Liu

Zhang

et al. 2022

Ind. Eng. Chem. Res.

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In this study, polyimide (PI)/carbon fiber (CF) aerogel was fabricated via a freeze-drying method. The introduction of CF endows PI aerogels with good dimensional stability in the thermal imidization process. The resulting aerogel possesses excellent mechanical property (as high as 58.45 MPa) and good hydrophobic property (contact angle above 120°). The PI/CF aerogel also has very good radiation resistance, with a compressive modulus of 50.45 MPa even after 10 MGy irradiation, which is 86.53% of the initial modulus. These characteristics make the PI/CF aerogel very suitable for applications in radiation environment. Subsequently, a carbon aerogel with high temperature resistance and good mechanical properties was obtained by carbonization of the PI/CF aerogel. Its comprehensive property is comparable to traditional porous carbon-bonded carbon fiber composites.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Fabrication and Properties of Polyimide/Carbon Fiber Aerogel and the Derivative Carbon Aerogel

Liu

Zhang

et al. 2022

Ind. Eng. Chem. Res.

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“…The thermal conductivity of CA/PAA-wrapped SF aerogel fibers was measured as 0.031 W/(m·K), which is lower than SiO 2 -based aerogels [35,36,37]. Meanwhile, the thermal conductivity of the aerogel fiber remains competitive among previous aerogel-based thermal insulation materials, including inorganic aerogels (e.g., SiO 2 -based and carbon aerogels) and organic aerogels (e.g., cellulose and SF-based aerogels) (Figure S4).…”

Section: Resultsmentioning

confidence: 99%

Continuous, Strong, Porous Silk Firoin-Based Aerogel Fibers toward Textile Thermal Insulation

et al. 2019

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Aerogel fiber, with the characteristics of ultra-low density, ultra-high porosity, and high specific surface area, is the most potential candidate for manufacturing wearable thermal insulation material. However, aerogel fibers generally show weak mechanical properties and complex preparation processes. Herein, through firstly preparing a cellulose acetate/polyacrylic acid (CA/PAA) hollow fiber using coaxial wet-spinning followed by injecting the silk fibroin (SF) solution into the hollow fiber, the CA/PAA-wrapped SF aerogel fibers toward textile thermal insulation were successfully constructed after freeze-drying. The sheath (CA/PAA hollow fiber) possesses a multiscale porous structure, including micropores (11.37 ± 4.01 μm), sub-micron pores (217.47 ± 46.16 nm), as well as nanopores on the inner (44.00 ± 21.65 nm) and outer (36.43 ± 17.55 nm) surfaces, which is crucial to the formation of a SF aerogel core. Furthermore, the porous CA/PAA-wrapped SF aerogel fibers have many advantages, such as low density (0.21 g/cm3), high porosity (86%), high strength at break (2.6 ± 0.4 MPa), as well as potential continuous and large-scale production. The delicate structure of multiscale porous sheath and ultra-low-density SF aerogel core synergistically inhibit air circulation and limit convective heat transfer. Meanwhile, the high porosity of aerogel fibers weakens heat transfer and the SF aerogel cellular walls prevent infrared radiation. The results show that the mat composed of these aerogel fibers exhibits excellent thermal insulating properties with a wide working temperature from −20 to 100 °C. Therefore, this SF-based aerogel fiber can be considered as a practical option for high performance thermal insulation.

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“…In our daily life, effective thermal protection is also crucial for personal safety, especially for people who are always exposed to excessive high- or low-temperature conditions, such as firefighters in fire rescue, steelworkers, divers in deep sea, polar researchers, and so on. Prior efforts to develop flexible thermal insulation textiles or fabrics primarily focused on the ultrafine nonwoven fabrics , and hollow synthetic fibers, , including the glass/carbon fiber felts , and hollow polypropylene, polyester, and nanocellulose fibers. Nevertheless, glass/carbon fiber felts are uncomfortable and have poor skin affinity, while traditional synthetic hollow fibers suffer from nonprominent comprehensive properties (such as low thermal stability, easy flammability), complex fabrication, etc.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Continuous and Porous Polyimide Aerogel Fibers for Multifunctional Applications

Gan

Dong

et al. 2021

ACS Appl. Mater. Interfaces

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High-performance aerogel fibers with high porosity, ultralow density and thermal conductivity, and good flexibility are attractive candidates for the next generation of effective thermal insulation, efficient personal thermal management, and other functional applications. However, most previously reported aerogel fibers suffered from either limited working temperatures, weak mechanical properties, or complex manufacturing processes. In the present work, a facile wet-spinning technique combined with freeze-drying was developed to fabricate strong polyimide aerogel fibers (PAFs) based on organo-soluble polyimide. Attributed to the unique "porous core−dense sheath" morphology, the PAFs exhibited excellent mechanical properties with an optimum tensile strength of 265 MPa and an initial modulus of 7.9 GPa at an ultimate elongation of 65%, representing the highest value for aerogel fibers reported so far. Moreover, the PAFs possess high porosity (>80%) and high specific surface area (464 m 2 g −1 ), which render the woven PAF fabrics with excellent thermal insulation properties within a wide temperature range (−190 to 320 °C) and potential applications for thermal insulation under harsh environments. Additionally, a series of functionalized aerogel fibers or their fabrics based on PAFs, including phase-change fabrics with a thermoregulation function and electromagnetic shielding (EMI) textiles with a high EMI SE value, have been successfully fabricated for expanding their potential applications. Overall, this novel aerogel fiber sheds light on a promising direction for developing the next generation of high-performance thermal insulation and multifunctional fibers and textiles.

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Porous carbon-bonded carbon fiber composites impregnated with SiO2-Al2O3 aerogel with enhanced thermal insulation and mechanical properties

Cited by 52 publications

References 14 publications

Fabrication and Properties of Polyimide/Carbon Fiber Aerogel and the Derivative Carbon Aerogel

Fabrication and Properties of Polyimide/Carbon Fiber Aerogel and the Derivative Carbon Aerogel

Continuous, Strong, Porous Silk Firoin-Based Aerogel Fibers toward Textile Thermal Insulation

Facile Preparation of Continuous and Porous Polyimide Aerogel Fibers for Multifunctional Applications

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