Comparative study of polymer-based nanocomposites microwave absorption performance in X–band

Santhosi, B. V. S. R. N.; Ramji, K.; Rao, N.B.R. Mohan; Naidu, M. K.

doi:10.1088/2053-1591/ab621e

Cited by 12 publications

(10 citation statements)

References 30 publications

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“…By correlating with SEM analysis and previous reports with the present study, the composites with 5% level with PEC have better performance as electromagnetic absorbing properties and agglomeration process at 7% CNT level for composites. Thus, this characteristic suggests the formation of an interconnection network with CNT and PEC in the composites, which promotes better electrical and dielectric losses (Su et al, 2012;De Rosa et al, 2010;Santhosi et al, 2019Santhosi et al, , 2020.…”

Section: Microwave Absorbing Performancementioning

confidence: 97%

“…The maximum absorption reaches À43.56 dB when the concentration of CNT is 5% and reduced to À19.42 dB when the concentration increased to 7%. Due to the agglomeration of CNT in the epoxy resin, Figure 6 as shown in Table 1 SEM analysis about the agglomeration effect (Su et al, 2012;De Rosa et al, 2010;Santhosi et al, 2019Santhosi et al, , 2020.…”

Section: Microwave Absorbing Performancementioning

confidence: 99%

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Electromagnetic and microwave absorption properties of MWCNTs based polymer nanocomposites

Geeri¹,

Kolakoti²

2021

WJE

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Purpose The purpose of the present work is to fabricate composite with strong absorbing nature and with more strength. The usage of wireless communication is increasing day by day, electromagnetic absorbing material is required to reduce this pollution. In the present experimental investigation, composites were fabricated for zero and 45° fiber orientation and as a filler material of Multiwall Carbon Nanotubes (MWCNTs) for the proposed percentage in the composites. Microwave absorbing properties were investigated for both perfect electric conductor (PEC)-backed composites and without PEC-backed composites. Design/methodology/approach The electromagnetic absorbing performance was analyzed based on complex permeability, complex permittivity, dielectric tangent and magnetic tangent losses. The experimentation was done by Vector Network Analyzer in the frequency range of 8.2 to 12.4 GHz by X-band. The surface morphological study was done. The mechanical and thermal properties are also investigated for these composites. Findings By investigating the experimental values, the induced percentage of MWCNTs and PEC of composites affects the electromagnetic and microwave absorption properties of the composites. The microwave absorption properties improved when the composites were able to absorb wide bandwidth and low reflection loss. The best results are obtained for PEC-backed composites for 5%, which is about −43.56 dB at 11.1 GHz compared to without PEC-backed composites. The reflection loss is developed by the dielectric loss initiated from MWCNTs and by PEC. Originality/value To the best of the authors’ knowledge, no work was reported on hand lay-up method and PEC-backed composites in electromagnetic absorption properties with regression analysis.

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Section: Microwave Absorbing Performancementioning

confidence: 97%

Section: Microwave Absorbing Performancementioning

confidence: 99%

Electromagnetic and microwave absorption properties of MWCNTs based polymer nanocomposites

Geeri¹,

Kolakoti²

2021

WJE

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“…Recently, polyurethane/graphene composites have been attracting much attention in microwave absorption and electromagnetic shielding. 134–151 Santhosi et al 134 observed the R L value of −35 dB at 12.1 GHz and SE value of −45 dB in PU/epoxy reinforced with 2.5 wt% of graphene. In another work, epoxy-encapsulated PU/graphene (2.5–4.2 wt%) showed EMI SE in the range of 30–61 dB in the X band.…”

Section: Carbonaceous Nanomaterials/polymer Nanocompositesmentioning

confidence: 98%

“…4 Accordingly, the EMI shielding properties of nanocarbon incorporated in polymethylmethacrylate (PMMA), polystyrene (PS), epoxy resin (ER), polypropylene (PP), polyurethane (PU), polyvinylalcohol (PVA), polydimethylsiloxane (PDMS), polyimide (PI), polyethylene (PE), natural rubber (NR) and few other polymers are reviewed below. 66–213…”

Section: Carbonaceous Nanomaterials/polymer Nanocompositesmentioning

confidence: 99%

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Recent advancements in the electromagnetic interference shielding performance of nanostructured materials and their nanocomposites: a review

Srivastava

Manna

2022

J. Mater. Chem. A

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Improved dispersion of reduced graphene oxide in benzoxazine composites via electrostatic interaction with M‐cresol

Wang

et al. 2023

Polymer Composites

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Reduced graphene oxide (rGO) exerts excellent performance in polymers, but suffers from poor dispersion. Here, the electrostatic interaction between the phenolic hydroxyl group of m‐cresol and rGO was discovered for the first time, and benzoxazine with m‐cresol containing rGO as the phenolic source were synthesized to achieve a more uniform dispersion of rGO in benzoxazine. The results show that the in situ synthesized rGO/benzoxazine system exhibited superior properties, including a lower curing reaction temperature (21°C relative reductions in curing temperature (225.7°C) for the system with 2 wt% rGO added in situ), higher dielectric constant ((8.69) relative improvement of 0.79), higher electromagnetic shielding value at 8.2–12.4 GHz ((7.45 dB) relative improvement of 0.75 dB), and higher thermal diffusivity at room temperature ((0.162 mm2/s) relative improvement of 26%). This study provides a method to homogeneously disperse rGO in benzoxazine without using of a solvent or any other treatment.

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Comparative study of polymer-based nanocomposites microwave absorption performance in X–band

Cited by 12 publications

References 30 publications

Electromagnetic and microwave absorption properties of MWCNTs based polymer nanocomposites

Electromagnetic and microwave absorption properties of MWCNTs based polymer nanocomposites

Recent advancements in the electromagnetic interference shielding performance of nanostructured materials and their nanocomposites: a review

Improved dispersion of reduced graphene oxide in benzoxazine composites via electrostatic interaction with M‐cresol

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