Electromagnetic Shielding Effectiveness of Woven Fabric with Integrated Conductive Threads after Washing with Liquid and Powder Detergents

Pušić, Tanja; Šaravanja, Bosiljka; Malarić, Krešimir; Luburić, Marta; Kaurin, Tea

doi:10.3390/polym14122445

Cited by 8 publications

(6 citation statements)

References 23 publications

(25 reference statements)

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“…Other current researches related to EMS fabrics mainly focus on the numerical model calculation (Liu and Wang, 2020), structural characteristics (Yin et al, 2022), performance improvement (Zhang et al, 2021;Pusic et al, 2022), influencing factors analysis (Wang et al, 2021;Toghchi et al, 2020), test evaluation (Vohra and El-Shenawee, 2021), new product Carbon nanotube fiber's effect development (Uzun et al, 2021;Tunakova et al, 2020) and new mechanism research (Yang et al, 2021;Kumar et al, 2021). However, these efforts have not addressed the simultaneous improvement of EMS and wave absorbing properties in EMS fabrics, nor have they explored the application of carbon nanotubes in EMS fabrics.…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon nanotube fiber on shielding effectiveness of stainless-steel electromagnetic shielding fabric

Liu,

Yang,

Wang

2024

IJCST

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PurposeStainless-steel electromagnetic shielding (EMS) fabrics are widely applied as protective materials against electromagnetic interference (EMI). However, these fabrics primarily shield electromagnetic waves through reflection, which can lead to the formation of resonance effects that severely compromise their protective capabilities and potentially cause secondary electromagnetic pollution in the external environment.Design/methodology/approachIn this paper, carbon nanotube fibers are added via spacing method to replace some stainless-steel fibers to impart absorbing properties to stainless-steel EMS fabric. The shielding effectiveness (SE) of the EMS fabrics across various polarization directions is analyzed. Additionally, a spacing arrangement for the carbon nanotube fibers is designed. The EMS fabric with carbon nanotube fibers is manufactured using a semi-automatic sample loom, and its SE is tested using a small window method test box in both vertical and horizontal polarization directions.FindingsAccording to the experimental data and electromagnetic theory analysis, it is determined that when the spacing between the carbon nanotube fibers is less than a specific distance, the SE of the stainless-steel EMS fabric significantly improves. The fabric exhibits stable absorbing properties within the tested frequency range, effectively addressing the issue of secondary damage that arises from relying solely on reflective shielding. Conversely, as the spacing between the carbon nanotube fibers exceeds this distance, the SE diminishes. Notably, the SE in the vertical polarization direction is substantially higher than that in the horizontal polarization direction at the same frequency.Originality/valueThis study provides a new path for the development of high-performance EMS fabrics with good wave-absorption characteristics and SE.

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Section: Introductionmentioning

confidence: 99%

Effect of carbon nanotube fiber on shielding effectiveness of stainless-steel electromagnetic shielding fabric

Liu,

Yang,

Wang

2024

IJCST

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“…Previous research found that cyclic washing of electromagnetic shielding fabric (EMS)—polyester/cotton fabric with integrated stainless steel threads (PES/CO/SS)—with specifically formulated powder and liquid detergent had an effect on the loss of protective characteristics. If the electromagnetic shield effect (EMSE) is monitored at higher frequencies, the composition of the powder and liquid detergents is appropriate [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…Shielding properties of the fabric were measured before and after professional care processes, including dry cleaning and wet cleaning in two variations at frequencies of 0.9 GHz, 1.8 GHz, 2.1 GHz, and 2.4 GHz. The influence of process parameters of dry and wet cleaning on the mechanical damage of the fabric was additionally analyzed using microscopic examination of the surface [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Durability of Shield Effective Polyester Cotton Fabric with Integrated Stainless Steel Threads in Processes of Dry and Wet Cleaning

et al. 2023

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Protective properties against electromagnetic radiation represent the essential value of textiles for protective clothing worn in hazardous working conditions. To ensure that protective clothing lasts for as long as feasible, care processes must be optimized, especially since protective clothing is subjected to repeated cycles due to soiling. Improved formulations of special detergents and agents with high-performance finishing agents used in care processes can contribute to a longer life of protective clothing. In this paper, the shield effectiveness of a cotton polyester fabric with integrated metal threads in the warp and weft directions at frequencies of 0.9 GHz, 1.8 GHz, 2.1 GHz, and 2.4 GHz is compared to that of its environmentally friendly alternative, wet cleaning processes. The research is carried out by varying process parameters: mechanics, chemical action, and cycle number. The results proved the drop of shield properties of polyester/cotton fabric with integrated stainless steel threads depending on frequencies and the number of professional cleaning cycles. The worst shield effectiveness of the tested fabric was obtained after 10 cycles of dry cleaning, wherein the degree of protection at frequency 2.4 GHz is reduced by 6.89 dB. According to the obtained results, the level of functional properties was better preserved in the wet cleaning process, which additionally has better ecological premises compared to dry cleaning process.

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“…However, the research of this aspect is still slow, and the existing mainly focuses on the numerical model calculation [ 4 ], structural characteristics [ 5 ], performance improvement [ 6 , 7 ], influencing factors analysis [ 8 , 9 ], test evaluation [ 10 ], new product development [ 11 , 12 ], and new mechanism research [ 13 , 14 ]. At present, improving the SE of the EMS fabric and retaining the inherent porous characteristics lack effective methods.…”

Section: Introductionmentioning

confidence: 99%

Shielding Performance of Electromagnetic Shielding Fabric Implanted with “Split-Ring Resonator”

2023

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The electromagnetic shielding (EMS) fabric is an important electromagnetic protection product, which is widely applied in various fields. The improvement of its shielding effectiveness (SE) has always been the focus of research. This article proposes to implant a metamaterial structure of a “split-ring resonator (SRR)” in the EMS fabrics, so that the fabric not only maintains the porous and lightweight characteristics, but also obtains the SE improvement. With the help of the invisible embroidery technology, stainless-steel filaments were used to implant hexagonal SRRs inside the fabric. The effectiveness and influencing factors of the SRR implantation were described by testing the SE of the fabric and analyzing the experimental results. It was concluded that the SRR implantation inside the fabric can effectively improve the SE of the fabric. For the stainless-steel EMS fabric, the increase amplitude of the SE reached between 6 dB and 15 dB in most frequency bands. The overall SE of the fabric showed a decrease trend with the reduction of the outer diameter of the SRR. The decrease trend was sometimes fast and sometimes slow. The decreasing amplitudes were different in various frequency ranges. The number of embroidery threads had a certain effect on the SE of the fabric. When other parameters remained unchanged, the increase of the diameter of the embroidery thread resulted in the increase of the SE of the fabric. However, the overall improvement was not significant. Finally, this article also points out that other influencing factors of the SRR need to be explored, and the failure phenomenon may occur under certain situations. The proposed method has the advantages of the simple process, convenient design, no pore formation, SE improvement retaining the original porous characteristics of the fabric. This paper provides a new idea for the design, production, and development of new EMS fabrics.

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Electromagnetic Shielding Effectiveness of Woven Fabric with Integrated Conductive Threads after Washing with Liquid and Powder Detergents

Cited by 8 publications

References 23 publications

Effect of carbon nanotube fiber on shielding effectiveness of stainless-steel electromagnetic shielding fabric

Effect of carbon nanotube fiber on shielding effectiveness of stainless-steel electromagnetic shielding fabric

Durability of Shield Effective Polyester Cotton Fabric with Integrated Stainless Steel Threads in Processes of Dry and Wet Cleaning

Shielding Performance of Electromagnetic Shielding Fabric Implanted with “Split-Ring Resonator”

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