Gas detonation-prepared nano-carbon-based capsule matrix materials: characterisation and microwave-absorption properties

Abstract

Carbon-based capsule nanomaterials were synthesised through gas-phase detonation using acetylene gas, oxygen, and pentacarbonyl iron. The resulting nanoparticles consisted of a thin layer of capsule-like amorphous carbon with a high specific surface area and strong adsorption capacity. The products exhibited good electromagnetic properties with good reflection loss and absorption capabilities in the frequency range 2–18 GHz. The effective response frequency band ranged from 10.12 to 11.30 GHz, and the reflection loss reached 10.94 dB at 10.96 GHz. The absorption mechanism was mainly owing to dielectric loss as no significant magnetic loss was observed. These nanomaterials have the potential to be used as a matrix for carrying other nanomaterials and for adjusting the impedance-matching of composite materials, thereby enhancing electromagnetic-wave absorption.

KEYWORDS:

• Nanomaterial
• electromagnetic-wave-absorbing material
• carbon material
• gas detonation
• characterisation

Acknowledgements

The authors acknowledge the support provided by the National Natural Science Foundation of China (Grant No. 52005065) and the National Natural Science Foundation of Chongqing Technology and Business University (Grant Nos. 2152031 and 2156010).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors acknowledge the support provided by the National Natural Science Foundation of China [grant number 52005065] and the National Natural Science Foundation of Chongqing Technology and Business University [grant nos. 950321024 and 950121057].