Biomass-derived materials: Promising, affordable, capable, simple, and lightweight microwave absorbing structures

Peymanfar, Reza; Mirkhan, Ali

doi:10.1016/j.cej.2022.136903

Cited by 60 publications

(27 citation statements)

References 102 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Biomass-derived materials are a precious category applied in the fabrication of carbon-based materials. [33][34][35] For example, agricultural wastes, [36] forest derivatives, [37,38] insects, [39] etc., can be processed into cutting-edge MA absorbers. Herein, the chitosan-rich crab shells are recycled as raw materials, which are carbonized, removed impurities, and constructed porous structure by annealing, acid treatment, and KOH activation, respectively.…”

Section: Introductionmentioning

confidence: 99%

Catfish Effect Induced by Anion Sequential Doping for Microwave Absorption

Tao

Pei

et al. 2022

Adv Funct Materials

100

View full text Add to dashboard Cite

Heteroatom doping engineering is desirable in tuning crystal structures and electrical properties, which is considered an opportunity to further develop microwave absorption materials. However, the competition mechanism and priority among doped atoms have not been revealed, which are insufficient to guide the most reasonable dielectric coupling model and design highperformance absorbers. In this work, based on in situ N and O, ex situ S is introduced through external thermal driving, leading to fierce competition among anions. Specifically, S atoms replace pyrrole N, drive out lattice O, and create O vacancies, bringing more extensive local charge redistribution and stronger electron interaction, thus activating the defect-induced polarization (3-6 times higher than conduction loss) in the middle/high-frequency region. Therefore, the effective absorption bandwidth (EAB) of 9.03 GHz and the minimum reflection loss (RL min ) of −64.05 dB at a filling rate of 10 wt.% are obtained, which improves the record of carbon absorbers as reported. Through macro-designs, i.e., multi-layer gradient metamaterial, or utilizing other advantages, e.g., cost-effective, stable chemical properties and wideangle absorption, porous carbon may possess a great application prospect in the naval field.

show abstract

Section: Introductionmentioning

confidence: 99%

Catfish Effect Induced by Anion Sequential Doping for Microwave Absorption

Tao

Pei

et al. 2022

Adv Funct Materials

100

View full text Add to dashboard Cite

show abstract

“…Also, a large magnetic permeability will lead to the contribution of a higher absorption loss to the EMI. 29,30 Absorption-dominated EMI shielding composites with magnetic and conductive fillings have recently attracted much attention.…”

Section: Introductionmentioning

confidence: 99%

“…According to Schelkunoff formulation, 28 an excellent conductivity will strengthen the absorption loss (SE A ), reflection loss (SE R ), and the total shielding effectiveness (SE T ) of the shielding material. Also, a large magnetic permeability will lead to the contribution of a higher absorption loss to the EMI 29,30 . Absorption‐dominated EMI shielding composites with magnetic and conductive fillings have recently attracted much attention.…”

Section: Introductionmentioning

confidence: 99%

Regulation binary electromagnetic filler networks in segregated poly(vinylidenefluoride) composite for absorption‐dominated electromagnetic interference shielding

Zhang

Cui

Zhao

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

Excellent conductivity and optimized impedance matching are vital for superior absorption-dominated electromagnetic interference (EMI) shielding. An efficient binary electromagnetic filler network regulation method has been proposed. Poly-(vinylidenefluoride)-ferroferric oxide-reduced graphene oxide/ single-wall carbon nanotube (PVDF-Fe 3 O 4 -RGC) composite has been synthesized as a layered segregated polymer composite structure by using an electrostatic assembly and hot compression strategy. Binary electromagnetic filler networks have surpassed the obstacles of magnetic materials in conductive networks, and are thereby beneficial for outstanding conductivity and impedance matching. Therefore, a superior conductivity of 1.28 S cm À1 and an outstanding electromagnetic shielding interference and effectiveness of 44.5 dB have been obtained for loading of 2.02 vol.% single-wall carbon nanotubes (SWCNTs), with an absorption rate larger than 85.0% in the X-band. The enhanced EMI shielding performance is attributed to the regulation of the binary electromagnetic filler network.

show abstract

“…Lightweight microwave absorbing materials (LMAM) working on the 8-12 GHz (X-band) frequency has and is attracting a lot of attention to applications in the fields of industrial, civil, shielding, health and military technology [1][2][3][4]. LMAM is usually developed based on magnetic materials, but is currently being developed from dielectric materials namely reduced graphene oxide (rGO).…”

Section: Introductionmentioning

confidence: 99%

Reduced graphene oxide-ferrite microcomposites based on petung bamboo (dendrocalamus asper) charcoal and iron sand as lightweight microwave absorbing materials

Mashuri

Usman²,

Suyatno³

2023

Mater. Res. Express

View full text Add to dashboard Cite

Reduced graphene oxide-ferrite (rGO/Fe3O4) microcomposites as lightweight microwave absorbing materials has been successfully synthesized from petung bamboo and iron sand by mechanical mixing method at different rGO content (0:1, 1:0, 1:1, 1:2, 1:3, 2:1 and 3:1 wt.%). Reduced graphene oxide as dielectric material was synthesized from petung bamboo charcoal using carbonization method and ferrite as magnetic material was synthesized from iron sand using extraction-milling method. Structural characterization by X-ray Fluorosence, Fourier Transform Infrared, Vibrating Sample Magnetometry, X-ray Diffraction, Scanning Electron Microscopy proved that micrometer sized reduced graphene oxide ferrite in the microcomposites was responsible for the ferromagnetic behavior of the composites. The reflection loss of microcomposites measured in the microwave frequency range of 8-12 GHz using a Vector Network Analyzer. The results showed that at the micro scale, rGO had a higher absorption power with maximum reflection loss (RLm) value of -21.81 dB at matching frequency (fm) 10.85 GHz compared with Fe3O4 (RLm value of -9.25 dB at fm = 10.60 GHz) at thickness of 1 mm. The rGO/Fe3O4 (2:1 wt.%) microcomposites microwave absorber shows the optimum absorption with maximum reflection loss value of −16.51 dB at matching frequency (fm) 10.74 GHz at thickness of 1 mm. The use of natural materials and the controlled rGO/Fe3O4 microcomposites structure with simple synthesis methods, which the urgent need for developing high performance lightweight microwave abrsorbing materials and are environmentally friendly.

show abstract

Biomass-derived materials: Promising, affordable, capable, simple, and lightweight microwave absorbing structures

Cited by 60 publications

References 102 publications

Catfish Effect Induced by Anion Sequential Doping for Microwave Absorption

Catfish Effect Induced by Anion Sequential Doping for Microwave Absorption

Regulation binary electromagnetic filler networks in segregated poly(vinylidenefluoride) composite for absorption‐dominated electromagnetic interference shielding

Reduced graphene oxide-ferrite microcomposites based on petung bamboo (dendrocalamus asper) charcoal and iron sand as lightweight microwave absorbing materials

Contact Info

Product

Resources

About