Ultralight microwave absorber with an enhanced absorption performance based on chitosan aerogel
Year: 2026
Type: article
Abstract: In order to meet practical application, the fabrication and design of lightweight and multifunctional microwave absorbers is challenging. The strategy of this work, is the fabrication of polymer/carbon/mineral MoSe2/RGO/MMTi-Chitosan as a hybrid aerogel via freeze-drying method by introducing the adjusted weight ratio of MoSe2/RGO/MMTi (i = 0, 35, 50, and 75 wt% were named as: m1, m2, m3 and m4, respectively) nanocomposites as filler of chitosan polymer. FESEM confirmed the porous morphology of aerogels at different scales. The microwave absorption measurements showed that, raw chitosan polymer has a weak absorption efficiency. A significant improvement in microwave absorption efficiency was observed by introducing MoSe2/RGO/MMTi filler. MoSe2/RGO/MMT(50%wt)-Chitosan (m3) showed the RLmin of -72 dB with a bandwidth of 3.8 GHz at 2.7 mm. M4 showed the broadest bandwidth at 2.3 mm which covered the entire frequency X and Ku band. The energy conversion and absorption in MoSe2/RGO/MMTi-Chitosan originated from synergetic effect of these factors: high electrical conductivity of MoSe2/RGO, extensive surface of MMT which reduces MoSe2 agglomeration and microporous structure of chitosan. Finite element simulation showed that by covering a PEC (perfect electrical conductor) sphere with 2.3 mm of each composite, the radar cross-section (RCS) reduced to 30–60 dB across the entire frequency band and the scattered far filed reduced 30-35dB.
Source: Scientific Reports
Institution: Vali Asr University of Rafsanjan
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
OpenAlex ID: W7129052123