Abstract
Elastomeric, conductive composite yarns have recently received attention around the opportunity for them to offer special protective fields. A straightforward approach for fabricating tri-component elastic-conductive composite yarns (t-ECCYs) containing stainless steel wire (SSW) was proposed previously. This work mainly focuses on the electromagnetic shielding effectiveness (EMSE) of weft-stretchable woven fabric containing t-ECCY over the X-band under different testing conditions, e.g., single step-by-step elongation, cyclic stretch and lamination events. Results showed that a woven cotton fabric with weft yarn of t-ECCY not only exhibited superior weft stretch-ability to a higher elongation (>40%) compared with a pure cotton control but also had an acceptable 15-cyclic stability with 80% shape recovery retention. The t-ECCY weft fabric was effective in shielding electromagnetic radiation, and its EMSE was also enhanced at elevated elongations during stretch at parallel polarization of EM waves. There was also no decay in EMSE before and after the t-ECCY fabric was subject to 15 stretch cycles at extension of 20%. In addition, a 90° by 90° cross lamination of t-ECCY fabric remarkably improved the EMSE compared to a 0°/90° one. The scalable fabrication strategy and excellent EMSE seen in t-ECCY-incorporated fabrics represent a significant step forward in protective fields.
Highlights
Electromagnetic interference (EMI) is a new but ubiquitous source of radiation pollution, which affects the normal function of sensitive electronic equipment and systems and increasingly has become an environmental and health concern mainly due to a rapid increase in use of telecommunication, digital devices, coil components and electromagnets [1,2,3,4]
When an EM wave is incident to the conducting element with E field of wave parallel to conducting element (Figure 4e), an induced electrical field and a displacement current is generated in the conductor; this causes free electrons in metal to move under an acceleration that emits radiations in all directions, and the conducting element behaves as if it was a new source of EM wave as per the Huygens0 s principle
Investigating of dynamic elastic behavior is an objective evaluation of the stretch and recovery performance of elastic fabrics
Summary
Electromagnetic interference (EMI) is a new but ubiquitous source of radiation pollution, which affects the normal function of sensitive electronic equipment and systems and increasingly has become an environmental and health concern mainly due to a rapid increase in use of telecommunication, digital devices, coil components and electromagnets [1,2,3,4]. Yarns with a range of different conductive fibers and wires have been examined including stainless steel [5,7,19,20,21,22,23], copper [23,24], silver-coated wire [25] Fabrics containing these components offer a great opportunity to develop a new wave of EM shielding textiles due to their versatility, flexibility and 3D conformability to any desired apparel. One purpose of this work is to provide information around the above-mentioned gap in the analysis of conductive fabrics with elastic properties To simultaneously integrate these intriguing properties for a woven stretchable fabric, including elasticity, flexibility, cyclic durability, excellent EMI shielding performance, and easy processing, we prepared a woven fabric incorporating tri-component, elastic-conductive composite yarns (t-ECCYs) [30,31,32,33,34] along its weft direction, which can be applied for radar and thermal camouflage in military applications. This work puts forward a promising and scalable strategy for large-scale, lowcost fabrication of multifunctional stretchable and wearable protective devices
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