A broadband and tunable microwave absorption technology enabled by VGCFs/PDMS–EP shape memory composites

Xiang Li, Yaofeng Zhu, Xuqing Liu, Ben Bin Xu, Qingqing Ni

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A facile method for fabricating intelligent microwave absorber of vapor grown carbon fibers/Polydimethylsiloxane–epoxy resin shape memory composites (VGCFs/PDMS–SMEP) composites was proposed to deliver intelligently tunable and broadband microwave absorption performance. The maximal absorption intensity was regulated by varying the deformation of the composites driven by the superior shape memory property of SMEP, where practical the minimum reflection loss (RLmin) reaches -55.7 dB at 16.0 GHz with the thickness of 2.0 mm. The effective absorption bandwidth (EAB) reached 9.8 GHz, which covered the whole applied frequency range (8.2–18.0 GHz). The intelligent microwave absorption performance of the sample was attributed to robust conductive loss and dielectric loss enhanced by the dipole relaxations and multi-reflections. Thus, VGCFs/PDMS–SMEP composites serves as the key that really opens up opportunity for the application as flexible, shape memory and tunable high performance broadband microwave absorption absorber in frontiers such as wearable electronic devices, chips protection, stealth technology and information security.
Original languageEnglish
Article number111954
Number of pages9
JournalComposite Structures
Volume238
Early online date25 Jan 2020
DOIs
Publication statusPublished - 15 Apr 2020

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