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. 2021 Jul 6;14(14):3779.
doi: 10.3390/ma14143779.

A Silver Yarn-Incorporated Song Brocade Fabric with Enhanced Electromagnetic Shielding

Xiuling Zhang  1   2 , Zimin Jin  3 , Lizhu Hu  1 , Xinyi Zhou  1 , Kai Yang  2 , Dana Kremenakova  2 , Jiri Militky  2
Affiliations

A Silver Yarn-Incorporated Song Brocade Fabric with Enhanced Electromagnetic Shielding

Xiuling Zhang et al. Materials (Basel). .

Abstract

The fabrics with electromagnetic interference (EMI) have been used in various fields. However, most studies related to the EMI fabrics focused on the improvement of the final electromagnetic shielding effectiveness (EM SE) by adjusting the preparation parameters while the breathability of the EMI fabrics was affected and the visible surficial patterns on the EMI fabric was limited. In this work, the two samples based on the Song Brocade structure were fabricated with surficial visible pattern ''. One was fabricated with silver-plated polyamide (Ag-PA) yarns and the silk yarns, the another with polyester (PET) yarns and the silk yarns. The weaving structure of the two samples were investigated by scanning electronic microscopy (SEM) and laser optical microscopy (LOM). The resistance against the EM radiation near field communication (NFC) and the ultraviolet (UV) light was also evaluated. Besides, the surface resistance, the air permeability and the water evaporation rate were investigated. The results revealed that the '' appeared successfully on the surface of the two samples with stable weaving structure. The Ag-PA yarn-incorporated Song Brocade fabric had the EMI shielding effectiveness value around 50 dB, which was supported by the low surface resistance less than 40 Ω. The excellent NFC shielding of the Ag-PA yarn-incorporated Song Brocade was also found. The ultraviolet protection factor (UPF) value of the Ag-PA yarn-incorporated Song Brocade fabric was higher than 190. The air permeability and the evaporation rate of the Ag-PA yarn-incorporated Song Brocade fabric was higher than 99 mm/s, and 1.4 g/h, respectively. As a result, the Ag-PA yarn-incorporated Song Brocade fabrics were proposed for both the personal and the industrial scale utilization.

Keywords: Song Brocade fabric; UV protection; air permeability; electromagnetic shielding; surficial pattern.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Fabric weaves and structure of the Song Brocade fabric (schematic cross-section).
Figure 2
Figure 2
The optical images of the prepared sample S1 and S2 under standard light source.
Figure 3
Figure 3
Evaluation of NFC shielding for the prepared samples ((A): The standard measurement and (B): the measurement with mobile phone and IC card).
Figure 4
Figure 4
Morphology of the two Song Brocade fabrics from SEM ((A,A’): the front side and back side of sample S1; (B,B’): the front side and back side of sample S2).
Figure 5
Figure 5
Morphology of the two Song Brocade fabrics from LSM ((A,A’): the front side and back side of sample S1; (B,B’): the front side and back side of sample S2).
Figure 6
Figure 6
SEM-EDX results for both sides of two Song Brocade fabrics ((A,A’): the front side and back side of sample S1; (B,B’): the front side and back side of sample S2).
Figure 6
Figure 6
SEM-EDX results for both sides of two Song Brocade fabrics ((A,A’): the front side and back side of sample S1; (B,B’): the front side and back side of sample S2).
Figure 7
Figure 7
EM SE values versus frequency of EM curves for the Song Brocade Fabrics.
Figure 8
Figure 8
Practical measurement with NFC function in mobile phone ((a): the mobile phone read unprotected IC cards, (b): the details of IC card, (c): wrapping IC cards with the sample S2, (d): the reading situation of the mobile phone from the wrapped IC card and (e): no signal response shown on the mobile phone).
Figure 9
Figure 9
Description for the measurement of the surface resistance of the sample S2.
Figure 10
Figure 10
The change of resistance with distances for the silver-incorporated Song Brocade fabric (the sample S2).
Figure 11
Figure 11
The UV transmittance of the Song Brocade fabrics with and without Ag-PA yarns over 290–400 nm.
Figure 12
Figure 12
Evaluation of water evaporation rate of the sample S1 and S2.
Figure 13
Figure 13
The other Song Brocade fabric with Ag-PA yarns.
See this image and copyright information in PMC

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