Superelastic Graphene‐Based Composite Aerogel for Thermal and Electromagnetic Protection in Extreme Temperature Environments DOI

Junwei Yue,

Mengmeng Qin, Huitao Yu

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract The aerogel materials stacked with nanomaterials usually have good thermal insulation and electromagnetic wave (EMW) absorption properties due to their porous properties. However, consecutive mechanical loading cycles under extreme temperature environments cause irreversible structural damage. Furthermore, there is an inherent contradiction between the characteristics of multiple interfaces anti‐fatigue performance. In this study, polyimide (PI) fibers are dispersed in graphene aerogel, composite (G‐PI@F 20 /CNT x ) can be formed by situ welding. hierarchical structure endows excellent superelasticity, insulation, EMW endures 90% strain compression over a range −196 160 °C, deformation loss remaining below 5%. This hinders phonon conduction, resulting low conductivity (0.0313 W m −1 K ). thickness 4.1 mm achieves effective bandwidth (EAB) 12.48 GHz. By increasing 20.3 mm, ultra‐broadband 15.24 GHz optimal reflection (RL min −43.49 dB attained. These findings provide crucial insights into design multifunctional absorbing offer general strategy for synthesizing superelastic aerogels.

Language: Английский

Superelastic Graphene‐Based Composite Aerogel for Thermal and Electromagnetic Protection in Extreme Temperature Environments DOI

Junwei Yue,

Mengmeng Qin, Huitao Yu

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract The aerogel materials stacked with nanomaterials usually have good thermal insulation and electromagnetic wave (EMW) absorption properties due to their porous properties. However, consecutive mechanical loading cycles under extreme temperature environments cause irreversible structural damage. Furthermore, there is an inherent contradiction between the characteristics of multiple interfaces anti‐fatigue performance. In this study, polyimide (PI) fibers are dispersed in graphene aerogel, composite (G‐PI@F 20 /CNT x ) can be formed by situ welding. hierarchical structure endows excellent superelasticity, insulation, EMW endures 90% strain compression over a range −196 160 °C, deformation loss remaining below 5%. This hinders phonon conduction, resulting low conductivity (0.0313 W m −1 K ). thickness 4.1 mm achieves effective bandwidth (EAB) 12.48 GHz. By increasing 20.3 mm, ultra‐broadband 15.24 GHz optimal reflection (RL min −43.49 dB attained. These findings provide crucial insights into design multifunctional absorbing offer general strategy for synthesizing superelastic aerogels.

Language: Английский

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