Morphology, electrical and magnetic study of α-Fe2O3 coated carbon fabric

Chandra, R. B. Jagadeesh; Kumar, M. Sathish; Shivamurthy, B.; Kulkarni, Suresh D.; Rao, Ashok; Poornesh, P.; Babu, P. D.

doi:10.1088/2053-1591/ab525f

Cited by 3 publications

(4 citation statements)

References 21 publications

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“…1,2 Therefore, for the electronic equipment to function properly and in order to guard humans from the harmful effects of EM radiation, suitable EMI shielding materials must be developed. 3 The drawbacks of conventionally employed metal-based EMI shielding materials have prompted the development of novel polymer based shielding materials. [4][5][6][7][8] Due to their potential uses in a variety of industries, including artificial skins, supercapacitors, and sensors, the creation of hydrogel-based EMI shielding materials having new features is emerging as an alternative.…”

Section: Introductionmentioning

confidence: 99%

A PDMS pocket based transparent polydopamine-decorated polypyrrole nanofibril–polyacrylamide hydrogel for EMI shielding applications

De,

Mondal,

Das

et al. 2024

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

A PDMS pocket based transparent polydopamine-decorated polypyrrole nanofibril–polyacrylamide hydrogel for EMI shielding applications

De,

Mondal,

Das

et al. 2024

J. Mater. Chem. C

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“…Higher energy waves can penetrate the human body and affect biological processes, increasing body temperature and damaging tissues. [5,6] In face of these drawbacks, a particular need to develop EMI shielding materials arose to restrain the unwanted electromagnetic emissions. EMI shielding consists in preventing EMW propagation from a medium to another, using materials with electromagnetic properties as a barrier.…”

Section: Introductionmentioning

confidence: 99%

Flexible microwave absorbing composites based on polydimethylsiloxane filled with hybrid carbonaceous materials: Statistical analysis of the synergistic effect

Gabino,

Soares

2023

Polymer Composites

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The effect of the combination of carbon nanotubes (CNT) and graphene nanoplatelets (GNP) on the electromagnetic absorbing properties of polydimethylsiloxane (PDMS) composites was investigated. Samples were prepared by a low‐cost and scalable simple one‐step blending approach. The number of experiments and sample compositions were optimized by design of experiments (DOE) technique, namely, Axial Simplex Centroid. The samples were analyzed concerning rheology, electric conductivity and electromagnetic properties, such as absorptivity (reflection loss – RL). CNT was revealed to be more efficient than GNP in structuring the conductive network of filler particles. On the other hand, the hybrid filler composite with a 1:1 ratio (CNT/GNP = 0.67%:0.67%) presented the highest electric conductivity (3.53 × 10−3 S m−1) and the best overall electromagnetic results, with measured RL reaching −25 dB and effective absorption bandwidth frequency of 4.6 GHz, with sample 2 mm thick. The best calculated RL value for this sample was observed with 2.5 mm with RL value corresponding to −46.8 dB. The special cubic polynomial model was successfully adjusted to the experimental data and statistically proved the synergistic effect of the hybrid on the electromagnetic properties of PDMS composites. Finally, PDMS/CNT/GNP composites were successfully prepared by a simple, fast and inexpensive method.

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“…Some of the illeffects include tissue damage, the formation of tumors, chances of infertility, etc. 1 Furthermore, they tend to cause electrical/electronic equipment to malfunction and disrupt the radio frequency spectrum, which are vital in defense, communication systems, appliances, and aerospace applications. They also have the potential to inflict huge damages around hazardous atmospheres by igniting flammable materials.…”

Section: Introductionmentioning

confidence: 99%

“…The emission of radiations in various frequency ranges from these electronic products creates an interference known as electromagnetic interference, which is capable of hampering the performance of such devices as a part of the system or whole. 1 To run smooth operation within the majority of these important agencies of national security, banking, etc., it is vital to have EMI shielding materials that are effective in blocking out these damaging radiations that may result in loss of life, money, etc.…”

Section: Introductionmentioning

confidence: 99%

Predicting Percolation Threshold Value of EMI SE for Conducting Polymer Composite Systems Through Different Sigmoidal Models

Rahaman

Gupta²,

Hossain

et al. 2022

J. Electron. Mater.

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Like electrical conductivity, the electromagnetic interference shielding effectiveness (EMI SE) of carbon-containing polymeric composites also goes through a transition phase known as the percolation threshold (PT). In this study, the applicability of various sigmoidal models such as Sigmoidal-Boltzmann (SB), Sigmoidal-Dose Response (SD), Sigmoidal-Hill (SH), Sigmoidal-Logistic (SL), and Sigmoidal-Logistic-1 (SL-1) to determine the PT of EMI SE has been tested for composites of ethylene vinyl acetate (EVA) copolymer and acrylonitrile butadiene rubber (NBR) matrix reinforced with various particulate and fibrous carbon fillers.It is observed that the SB and SD models predicted similar PT. On the other hand, other models reported different values when validated for any particular composite system. The difference in results of PT has been discussed in detail from a viewpoint of the benefits and vice versa of these models. Also, the classical percolation theory has been applied to determine the PT of EMI SE for comparison with the values obtained through the sigmoidal models. In order to judge the universal acceptability of these models, the EMI SE results have been tested for various polymeric composites taken from some published literature. The results indicate that all the models except the SL-1 model can be successfully applied for predicting the PT of EMI SE for polymer composites.

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Morphology, electrical and magnetic study of α-Fe₂O₃ coated carbon fabric

Cited by 3 publications

References 21 publications

A PDMS pocket based transparent polydopamine-decorated polypyrrole nanofibril–polyacrylamide hydrogel for EMI shielding applications

A PDMS pocket based transparent polydopamine-decorated polypyrrole nanofibril–polyacrylamide hydrogel for EMI shielding applications

Flexible microwave absorbing composites based on polydimethylsiloxane filled with hybrid carbonaceous materials: Statistical analysis of the synergistic effect

Predicting Percolation Threshold Value of EMI SE for Conducting Polymer Composite Systems Through Different Sigmoidal Models

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