Organic aerogel-impregnated low-density carbon/carbon composites: Preparation, properties and response under simulated atmospheric re-entry conditions

Wang, Chonghai; Jin, Xiangyu; Cheng, Haiming; Hong, Changqing; Zhang, Xinghong

doi:10.1016/j.matdes.2017.06.021

Cited by 36 publications

(8 citation statements)

References 50 publications

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“…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%

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%

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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“…After the incorporation of aerogel, the compressive strength of the zdirection significantly increased from 0.20 to 1.24 MPa in the x/y-direction, the strength improved from 0.60 to 2.55 MPa, but the density of the composites only slightly increased from 0.10 to 0.14 g cm −3 . The improvement of the compressive strength can be attributed to a resistive effect against the bending fracture or elastic bending/rotation of the fibres [24][25][26] caused by adding the CA filler into the pores of the CBCF. Thus, the composites' compressive strengths in both the x/y-and z-directions increased with CA incorporation.…”

Section: Mechanical Properties Of Cbcf and Cbcf-ca Compositesmentioning

confidence: 99%

Super-elastic carbon-bonded carbon fibre composites impregnated with carbon aerogel for high-temperature thermal insulation

Zhang

2019

Advances in Applied Ceramics

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A novel super-elastic carbon fibre composite was prepared by impregnating carbon aerogel into carbon-bonded carbon fibre (CBCF) through vacuum impregnation. The compressive strength of CBCF-CA was increased to 1.24 MPa in the z-direction, which was 6-fold more than that of neat CBCF. The CBCF-CA spontaneously recovered its size and shape without significant deformation when the pressure was released. The thermal conductivity of CBCF-CA was 0.246 W (m•K) −1 at 1400°C in the z-direction, which is lower than that of CBCF (0.341 W (m•K) −1 ). The average electromagnetic interference shielding effectiveness of CBCF-CA composites in the range of 12.4-18 GHz was higher than 40 dB, suggesting an absorption-dominant shielding feature. The CBCF-CA composite will be a new multifunctional material due to its low density, low thermal conductivity, high specific strength, excellent processability, super-elastic property and high electromagnetic shielding, which can be used for thermal insulation and protection of aerospace.

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“…Due to its low density (0.10~1 g cm −3 ), high porosity (60~90%), low thermal conductivity (<1 W m −1 k −1 ), and excellent high-temperature stability, it is widely used in the field of thermal insulation [ 1 , 2 , 3 , 4 , 5 , 6 ]. At present, the main preparation methods of CBCF composites are vacuum filtration, pressure filtration, and whole needle-punching method [ 7 , 8 , 9 , 10 ]. The vacuum filtration method or pressure filtration method has been developed because of its simplicity and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Preparation of Carbon-Bonded Carbon Fiber Based on Glucose-Polyacrylamide Hydrogel Derived Carbon as Binder

Zeng

Xie

et al. 2023

Nanomaterials

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Lightweight, high-temperature-resistant carbon-bonded carbon fiber (CBCF) composites with excellent thermal insulation properties are desirable materials for thermal protection systems in military and aerospace applications. Here, glucose was introduced into the polyacrylamide hydrogel to form the glucose-polyacrylamide (Glu-PAM) hydrogel. The CBCF composites were prepared using the Glu-PAM hydrogel as a brand-new binder, and the synergistic effect between glucose and acrylamide was investigated. The results showed the Glu-PAM hydrogel could limit the foaming of glucose and enhance the carbon yield of glucose. Meanwhile, the dopamine-modified chopped carbon fiber could be uniformly mixed by high-speed shearing to form a slurry with the Glu-PAM hydrogel. Finally, the slurry was successfully extruded and molded to prepare CBCF composites with a density of 0.158~0.390 g cm−3 and excellent thermal insulation performance and good mechanical properties. The compressive strength of CBCF composites with a density of 0.158 g cm−3 in the Z direction is 0.18 MPa, and the thermal conductivity in the Z direction at 25 °C and 1200 °C is 0.10 W m−1 k−1 and 0.20 W m−1 k−1, respectively. This study provided an efficient, environment-friendly, and cost-effective strategy for the preparation of CBCF composites.

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Organic aerogel-impregnated low-density carbon/carbon composites: Preparation, properties and response under simulated atmospheric re-entry conditions

Cited by 36 publications

References 50 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

Super-elastic carbon-bonded carbon fibre composites impregnated with carbon aerogel for high-temperature thermal insulation

Eco-Friendly Preparation of Carbon-Bonded Carbon Fiber Based on Glucose-Polyacrylamide Hydrogel Derived Carbon as Binder

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