Fabrics and their composites for electromagnetic shielding applications

Jagatheesan, Krishnasamy; Alagirusamy, R.; Das, Apurba; Basu, Ananjan

doi:10.1080/00405167.2015.1067077

Cited by 40 publications

(39 citation statements)

References 168 publications

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“…The EMI SE of the composite with unidirectional orientation of 90 • is almost the same as the orientation of 45/90 • , regardless of the composites C and D. This suggests that because the unidirectional 90 • of the CF contributes uniformly to conductive network in blend matrix which interacts with the electromagnetic waves, 18 there is scarcely the effect of fiber orientation on the electrical conductivity. Jagatheesan et al 19 observed the same as this results which the weave has no significant effect on the EMI SE.…”

Section: Emi Shielding Of Carbon Fiber Reinforced Bioplastic Compositessupporting

confidence: 75%

Effect of moisture absorption and fiber orientation on electrical conductivity and electromagnetic interference shielding of carbon fiber reinforced bioplastic composites

Solafide

Murakami

2019

Int. J. Mod. Phys. B

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The aim of this study is to discuss the effect of moisture absorption on electrical conductivity and electromagnetic interference of the carbon fiber (CF) reinforced bioplastic composite. The composites were prepared by the hot press machine, and immersed in water for 20 and 40 days. The electrical conductivity measurements were carried out as a function immersed time. The electrical conductivity of CF with two layers is greater than that of one layer, because the electrical conductivity increases with increasing the volume filler of CF. The electrical conductivity slightly increases with increasing the immersion time. The EMI SE (electromagnetic interference shielding effectiveness) of the composite was examined with the frequency from 500 MHz to 2000 MHz. The EMI SE of the CF increases with increasing the content of the CF, and the EMI SE result of composite is around 50 dB to 60 dB. There is scarcely significant effect of orientation on composite on the EMI SE.

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Section: Emi Shielding Of Carbon Fiber Reinforced Bioplastic Compositessupporting

confidence: 75%

Effect of moisture absorption and fiber orientation on electrical conductivity and electromagnetic interference shielding of carbon fiber reinforced bioplastic composites

Solafide

Murakami

2019

Int. J. Mod. Phys. B

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“…Polymer matrix composites containing conductive fillers have been extensively studied due to their growing demand for advanced technology and electronic systems [11]. The conductive material could be the right choice for use in shields, especially at low frequencies [12]. They are used in the field of electronics as flexibility conductors and absorption material especially with regard to electromagnetic radiation [13].…”

Section: Advances In Polymer Technologymentioning

confidence: 99%

The Effects of SLS on Structural and Complex Permittivity of SLS-HDPE Composites

Meli

Abbas

Zaid

et al. 2019

Advances in Polymer Technology

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RS-4050 is a rigid epoxy based magnetic castable microwave absorbing material; it has been used in many areas of waveguide application as a microwave waveguide terminations and dummy loads. In recent years, there is a demand for composites material with lower dielectric constant higher loss factor for microwave application. This research, the effect of soda lime silica (SLS) on structural and complex permittivity of soda lime silica-high density polyethylene (SLS-HDPE) composites was conducted in order to explore the possibility of substituting RS-4050 with SLS-HDPE composites as a microwave waveguide terminations and dummy loads. Elemental weight composition of the SLS glass powder and HDPE was identified through scaling of different percentage of SLS and HDPE. X-ray diffraction (XRD) was used to investigate the crystallinity behavior of SLS-HDPE composites. The proposed SLS-HDPE composites material was studied at frequencies 8 to 12 GHz. The study was conducted using waveguide Agilent N5230A PNA technique. The effect of microwave frequency on complex permittivity properties for SLS-HDPE composites of different percentages of SLS and HDPE (10% SLS-90% HDPE, 20% SLS-80% HDPE, 30% SLS-70% HDPE, 40% SLS-60% HDPE, and 50% SLS-50% HDPE) were investigated. Results showed the diffraction patterns reveal good amorphous quality with a genuinely properties structure. The microwave frequency and composites percentages significantly influenced the complex permittivity (real and imaginary) properties of the composites. Moreover, the complex permittivity increased as the percentage of SLS filler increased in the host matrix HDPE as a result of increased in composite density due to less volume being occupied by the filler as the percentage increased. The complex permittivity of the smallest and largest percentages of SLS (10% and 50%) was (2.67-j0.05) and (3.45-j0.35), respectively. The study revealed that the best sample for waveguide application as microwave terminator is 50% SLS as it has the highest dielectric constant, highest loss factor, and highest loss tangent as compared to 10% SLS to 40% SLS. Also 50% SLS has the highest absorption properties as compare to 10% SLS, 20% SLS, 30% SLS, or 40% SLS. The XRD physical structure of the SLS-HDPE composites revealed the absorption characteristics of different percentages of the materials. The SLS-HDPE composites can be applied in the area of waveguide as a microwave waveguide terminations and dummy loads.

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“…Basically, EM plane wave theory is generally applied for EMI shielding in far field region and it is based on the influence of electric (E) and magnetic (H) dipoles which is used for EMI shielding in near field region. [35] EM waves incident on the surface of an object and is attenuated by either reflection, absorption, multiple-reflection or is transmitted if not properly shielded [34,[36][37][38][39][40][41][42] as shown in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

Smart Textile Fabrics for Screening Millimeter Wavelength Radiations: Challenges and Future Perspectives

2018

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The conductive fabrics are widely used in smart protective textile, specifically to shield millimeter wavelength radiations. In this context, intrinsically conducting polymers (ICPs) have gained enormous interest in the recent past due to their myriad applications in the field of textile specifically because of their tunable conductivity, lightweight, ease of coating etc. Numerous research studies have been focused to develop electromagnetic (EM) shielding fabric using ICPs and various functional conducting, magnetic and dielectric nanoparticles. The objective of this review article is to highlight the state‐of‐the‐art literature and recent developments in this field involving surface modification of textile fabrics using physical/chemical methods targeted towards EM shielding application. Furthermore, this review also provides useful insight in the shielding mechanism and diverse processes to design and develop smart EM shielded flexible fabrics as protective textiles.

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Fabrics and their composites for electromagnetic shielding applications

Cited by 40 publications

References 168 publications

Effect of moisture absorption and fiber orientation on electrical conductivity and electromagnetic interference shielding of carbon fiber reinforced bioplastic composites

Effect of moisture absorption and fiber orientation on electrical conductivity and electromagnetic interference shielding of carbon fiber reinforced bioplastic composites

The Effects of SLS on Structural and Complex Permittivity of SLS-HDPE Composites

Smart Textile Fabrics for Screening Millimeter Wavelength Radiations: Challenges and Future Perspectives

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